首页 > 最新文献

Microbiology Research最新文献

英文 中文
First Record of Summer Truffle (Tuber aestivum) in Portugal 葡萄牙首次记录夏季块菌(Tuber aestivum)
IF 2.1 Q3 MICROBIOLOGY Pub Date : 2024-08-09 DOI: 10.3390/microbiolres15030101
Celeste Santos-Silva, C. Brígido
Tuber aestivum, commonly known as the summer truffle, is typically found in various parts of Europe where it grows naturally. However, its presence in Portugal was not confirmed until now. The first fruit bodies were collected in April 2024 at stone pine stands (Alenquer and Arruda dos Vinhos, Lisbon) and in June at holm oak stands (Salir, Faro). These specimens are characterized by hypogeous, subglobose, black ascomata with a peridium surface covered with pyramidal warts. Ascopores are subglobose-to-broadly ellipsoid, distinctively ornamented, usually 1–6 per asci. According to the results of the internal transcribed spacer (ITS) rDNA sequence analysis, these specimens form a well-supported group within the Aestivum clade, with T. aestivum being the closest phylogenetic taxon. This remarkable discovery opens up new opportunities for truffle exploitation in Portugal thanks to the summer truffle’s gastronomical value and high market prices.
Tuber aestivum,俗称夏松露,通常生长在欧洲各地。然而,直到现在葡萄牙才证实了它的存在。2024 年 4 月在石松林(里斯本的 Alenquer 和 Arruda dos Vinhos)和 6 月在冬青栎林(法鲁的 Salir)采集到了第一批果实。这些标本的特征是下生、近球形、黑色的气孔,包膜表面布满金字塔形的疣。气孔近球形至宽椭圆形,装饰明显,通常每个气孔 1-6 个。根据内部转录间隔(ITS)rDNA 序列分析的结果,这些标本在 Aestivum 支系中形成了一个支持性很强的类群,T. aestivum 是最接近的系统发育类群。由于夏季松露的美食价值和高昂的市场价格,这一重大发现为葡萄牙松露的开发利用带来了新的机遇。
{"title":"First Record of Summer Truffle (Tuber aestivum) in Portugal","authors":"Celeste Santos-Silva, C. Brígido","doi":"10.3390/microbiolres15030101","DOIUrl":"https://doi.org/10.3390/microbiolres15030101","url":null,"abstract":"Tuber aestivum, commonly known as the summer truffle, is typically found in various parts of Europe where it grows naturally. However, its presence in Portugal was not confirmed until now. The first fruit bodies were collected in April 2024 at stone pine stands (Alenquer and Arruda dos Vinhos, Lisbon) and in June at holm oak stands (Salir, Faro). These specimens are characterized by hypogeous, subglobose, black ascomata with a peridium surface covered with pyramidal warts. Ascopores are subglobose-to-broadly ellipsoid, distinctively ornamented, usually 1–6 per asci. According to the results of the internal transcribed spacer (ITS) rDNA sequence analysis, these specimens form a well-supported group within the Aestivum clade, with T. aestivum being the closest phylogenetic taxon. This remarkable discovery opens up new opportunities for truffle exploitation in Portugal thanks to the summer truffle’s gastronomical value and high market prices.","PeriodicalId":43788,"journal":{"name":"Microbiology Research","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141923382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Plant Growth Promoting Rhizobacteria on the Development and Biochemical Composition of Cucumber under Different Substrate Moisture Levels 不同基质湿度下植物生长促进根瘤菌对黄瓜生长和生化成分的影响
IF 2.1 Q3 MICROBIOLOGY Pub Date : 2024-08-09 DOI: 10.3390/microbiolres15030102
Gerardo Zapata-Sifuentes, Manuel Fortis-Hernández, Jorge Sáenz-Mata, Christian Silva-Martínez, Liliana Lara-Capistrán, P. Preciado-Rangel, L. Hernández-Montiel
Cucumis sativus L. plants are subjected to stress during production, affecting their growth, development, and fruit quality due to abiotic factors. Thus, the aim of this research is to evaluate Pseudomonas paralactis, Sinorhizobium meliloti, and Acinetobacter radioresistens plant growth promoting rhizobacteria (PGPR) effect on C. sativus plants under three substrate moisture levels (100, 75, and 50%). A randomized complete block design (RCBD) was used with an A x B arrangement: (1) factor A (inoculant) with four levels; (2) PGPR and control (without bacterium); (3) factor B (substrate moisture content) with three levels. Plant height, root length, and fresh weight increased by inoculating PGPR (121%, 135%, and 134%, respectively); likewise, these variables increased with higher moisture content (177%, 204%, and 234%, respectively), while the effect of the interactions of the PGPR and the moisture content in the substrate showed statistical differences in plant height increasing of 197% and root length of 267%. On the other hand, the content of phenols, flavonoids, and antioxidant capacity was statistically different (p ≤ 0.05) in inoculated plants, with PGPR increasing by 117%, 126%, and 150% respectively. In the moisture content of the substrate, statistical differences were observed, with an increase in the flavonoid content (114%) and antioxidant capacity (116%). The assimilation of nitrogen was higher by 274% and phosphorus by 124% with the PGPR inoculation, the moisture content increased the nitrogen content in the plant (257%) and the phosphorus content in plant (135%), showing significant differences (p ≤ 0.05). However, the interaction of PGPR and moisture content only presented statistical differences in nitrogen assimilation. PGPR can be considered as an alternative to obtain vigorous cucumber seedlings.
黄瓜(Cucumis sativus L.)植物在生产过程中会受到非生物因素的胁迫,影响其生长、发育和果实质量。因此,本研究旨在评估在三种基质水分水平(100%、75% 和 50% )下,假单胞菌(Pseudomonas paralactis)、拟杆菌(Sinorhizobium meliloti)和放射线杆菌(Acinetobacter radioresistens)植物生长促进根瘤菌(PGPR)对莴苣植株的影响。采用随机完全区组设计(RCBD),A x B 排列:(1) 因子 A(接种剂),四个水平;(2) PGPR 和对照(不含细菌);(3) 因子 B(基质含水量),三个水平。接种 PGPR 后,植株高度、根长和鲜重均有所增加(分别为 121%、135% 和 134%);同样,这些变量也随水分含量的增加而增加(分别为 177%、204% 和 234%),而 PGPR 与基质水分含量的交互作用效应则显示出统计学差异,植株高度增加了 197%,根长增加了 267%。另一方面,接种植物的酚类、类黄酮和抗氧化能力的含量与 PGPR 的影响有统计学差异(p ≤ 0.05),分别增加了 117%、126% 和 150%。基质的水分含量也存在统计学差异,类黄酮含量(114%)和抗氧化能力(116%)均有所增加。接种 PGPR 后,氮的同化率提高了 274%,磷的同化率提高了 124%,水分含量提高了植株中氮的含量(257%)和磷的含量(135%),差异显著(p ≤ 0.05)。然而,PGPR 和含水量的交互作用只在氮同化方面显示出统计学差异。PGPR 可被视为获得生长旺盛的黄瓜幼苗的一种替代方法。
{"title":"Effect of Plant Growth Promoting Rhizobacteria on the Development and Biochemical Composition of Cucumber under Different Substrate Moisture Levels","authors":"Gerardo Zapata-Sifuentes, Manuel Fortis-Hernández, Jorge Sáenz-Mata, Christian Silva-Martínez, Liliana Lara-Capistrán, P. Preciado-Rangel, L. Hernández-Montiel","doi":"10.3390/microbiolres15030102","DOIUrl":"https://doi.org/10.3390/microbiolres15030102","url":null,"abstract":"Cucumis sativus L. plants are subjected to stress during production, affecting their growth, development, and fruit quality due to abiotic factors. Thus, the aim of this research is to evaluate Pseudomonas paralactis, Sinorhizobium meliloti, and Acinetobacter radioresistens plant growth promoting rhizobacteria (PGPR) effect on C. sativus plants under three substrate moisture levels (100, 75, and 50%). A randomized complete block design (RCBD) was used with an A x B arrangement: (1) factor A (inoculant) with four levels; (2) PGPR and control (without bacterium); (3) factor B (substrate moisture content) with three levels. Plant height, root length, and fresh weight increased by inoculating PGPR (121%, 135%, and 134%, respectively); likewise, these variables increased with higher moisture content (177%, 204%, and 234%, respectively), while the effect of the interactions of the PGPR and the moisture content in the substrate showed statistical differences in plant height increasing of 197% and root length of 267%. On the other hand, the content of phenols, flavonoids, and antioxidant capacity was statistically different (p ≤ 0.05) in inoculated plants, with PGPR increasing by 117%, 126%, and 150% respectively. In the moisture content of the substrate, statistical differences were observed, with an increase in the flavonoid content (114%) and antioxidant capacity (116%). The assimilation of nitrogen was higher by 274% and phosphorus by 124% with the PGPR inoculation, the moisture content increased the nitrogen content in the plant (257%) and the phosphorus content in plant (135%), showing significant differences (p ≤ 0.05). However, the interaction of PGPR and moisture content only presented statistical differences in nitrogen assimilation. PGPR can be considered as an alternative to obtain vigorous cucumber seedlings.","PeriodicalId":43788,"journal":{"name":"Microbiology Research","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141921972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Probiotic Lactobacilli Ameliorate Antibiotic-Induced Cognitive and Behavioral Impairments in Mice 益生菌乳酸杆菌能改善抗生素诱发的小鼠认知和行为损伤
IF 2.1 Q3 MICROBIOLOGY Pub Date : 2024-08-08 DOI: 10.3390/microbiolres15030099
D. Yarullina, Vera Novoselova, Anastasia D. Alexandrova, A. Arslanova, Olga Yakovleva, Ilnar Shaidullov, Yury Nikolaev, Galina El-Registan, Vladimir Kudrin, G. Sitdikova
Increasing evidence suggests that the gut microbiota, through the “microbiota–gut–brain axis”, can regulate anxiety, mood, and cognitive abilities such as memory and learning processes. Consistently with this, treatments altering the gut microbiota, such as antibiotics and probiotics, may influence brain function and impact behavior. The mechanisms that underlie the interplay between the intestinal microbiota and the brain have been intensively studied. We aimed to investigate the effects of two probiotic lactobacilli strains, Lacticaseibacillus rhamnosus 12L and Lactiplantibacillus plantarum 8PA3, on behavioral disorders in mice induced by a two-week parenteral treatment with broad-spectrum antibiotics. On completion of the treatment, the mice were subjected to behavioral tests, including the open field test (OFT), novel object recognition test (ORT), and T-maze test. Antibiotic-treated mice demonstrated anxiety-related behavior, decreased cognition, and retarded exploratory activity that were ameliorated by the administration of probiotics. As was determined by high-performance liquid chromatography (HPLC), both tested strains produced serotonin and its metabolite 5-hydroxyindoleacetic acid (5-HIAA), as well as dopamine, which was further metabolized into norepinephrine by L. plantarum 8PA3 and epinephrine by L. rhamnosus 12L. Moreover, these lactobacilli were found to harbor catecholamines and 3,4-dihydroxyphenylacetic acid (DOPAC) in their biomass when grown on MRS broth. Additionally, L. plantarum 8PA3 and L. rhamnosus 12L were able to impact oxidative stress via H2O2 production and antioxidant activity, as determined in this study by the ferrous oxidation–xylenol orange (FOX) assay and the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay, respectively. The results obtained in this study support the role of probiotics as a promising therapeutic for neurological disorders. However, more investigations are required to confirm the clinical significance of this finding.
越来越多的证据表明,肠道微生物群通过 "微生物群-肠道-大脑轴 "可以调节焦虑、情绪和认知能力,如记忆和学习过程。与此相一致,改变肠道微生物群的治疗方法,如抗生素和益生菌,可能会影响大脑功能并影响行为。人们对肠道微生物群与大脑之间相互作用的机制进行了深入研究。我们的目的是研究两种益生菌株(鼠李糖乳杆菌 12L 和植物乳杆菌 8PA3)对广谱抗生素肠外治疗两周后诱发的小鼠行为紊乱的影响。治疗结束后,对小鼠进行了行为测试,包括开阔地测试(OFT)、新物体识别测试(ORT)和 T 型迷宫测试。经抗生素治疗的小鼠表现出与焦虑相关的行为、认知能力下降和探索活动迟缓,而服用益生菌后这些症状得到了改善。经高效液相色谱法(HPLC)测定,两种受试菌株都能产生血清素及其代谢产物 5-羟基吲哚乙酸(5-HIAA)以及多巴胺,植物乳杆菌 8PA3 和鼠李糖乳杆菌 12L 能将多巴胺进一步代谢为去甲肾上腺素和肾上腺素。此外,在 MRS 肉汤中生长时,发现这些乳酸菌的生物量中含有儿茶酚胺和 3,4-二羟基苯乙酸(DOPAC)。此外,植物乳杆菌 8PA3 和鼠李糖乳杆菌 12L 能够通过 H2O2 的产生和抗氧化活性影响氧化应激,本研究分别采用亚铁氧化-二甲酚橙(FOX)测定法和 2,2-二苯基-1-苦基肼(DPPH)自由基清除测定法进行了测定。本研究获得的结果支持益生菌作为一种有前景的神经系统疾病疗法的作用。然而,要证实这一发现的临床意义,还需要更多的研究。
{"title":"Probiotic Lactobacilli Ameliorate Antibiotic-Induced Cognitive and Behavioral Impairments in Mice","authors":"D. Yarullina, Vera Novoselova, Anastasia D. Alexandrova, A. Arslanova, Olga Yakovleva, Ilnar Shaidullov, Yury Nikolaev, Galina El-Registan, Vladimir Kudrin, G. Sitdikova","doi":"10.3390/microbiolres15030099","DOIUrl":"https://doi.org/10.3390/microbiolres15030099","url":null,"abstract":"Increasing evidence suggests that the gut microbiota, through the “microbiota–gut–brain axis”, can regulate anxiety, mood, and cognitive abilities such as memory and learning processes. Consistently with this, treatments altering the gut microbiota, such as antibiotics and probiotics, may influence brain function and impact behavior. The mechanisms that underlie the interplay between the intestinal microbiota and the brain have been intensively studied. We aimed to investigate the effects of two probiotic lactobacilli strains, Lacticaseibacillus rhamnosus 12L and Lactiplantibacillus plantarum 8PA3, on behavioral disorders in mice induced by a two-week parenteral treatment with broad-spectrum antibiotics. On completion of the treatment, the mice were subjected to behavioral tests, including the open field test (OFT), novel object recognition test (ORT), and T-maze test. Antibiotic-treated mice demonstrated anxiety-related behavior, decreased cognition, and retarded exploratory activity that were ameliorated by the administration of probiotics. As was determined by high-performance liquid chromatography (HPLC), both tested strains produced serotonin and its metabolite 5-hydroxyindoleacetic acid (5-HIAA), as well as dopamine, which was further metabolized into norepinephrine by L. plantarum 8PA3 and epinephrine by L. rhamnosus 12L. Moreover, these lactobacilli were found to harbor catecholamines and 3,4-dihydroxyphenylacetic acid (DOPAC) in their biomass when grown on MRS broth. Additionally, L. plantarum 8PA3 and L. rhamnosus 12L were able to impact oxidative stress via H2O2 production and antioxidant activity, as determined in this study by the ferrous oxidation–xylenol orange (FOX) assay and the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay, respectively. The results obtained in this study support the role of probiotics as a promising therapeutic for neurological disorders. However, more investigations are required to confirm the clinical significance of this finding.","PeriodicalId":43788,"journal":{"name":"Microbiology Research","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141927281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exploring Local Reservoirs for Bacteriophages with Therapeutic Potential against ESKAPE Pathogens 探索对 ESKAPE 病原体具有治疗潜力的噬菌体的本地蓄水池
IF 2.1 Q3 MICROBIOLOGY Pub Date : 2024-08-08 DOI: 10.3390/microbiolres15030098
Alejandra Aidee Loera Piedra, Isamar Leticia Becerra Mejía, Brenda Luna Galicia, Sergio Francisco Martínez Díaz, Julieta Luna Herrera, Ma. Guadalupe Aguilera Arreola
Bacteriophage therapy is a promising strategy used to treat antimicrobial-resistant or persistent bacterial infections. More recently, the clinical utility of bacteriophages has been rediscovered due to the rise of multi-drug resistance and their potential use in clinical practice as an additional treatment option. In this study, local municipal wastewater facilities, hospital wastewater systems, and freshwater reservoirs were evaluated for the presence of lytic bacteriophages. These phages were isolated using conventional phage isolation techniques: water sample collection and processing, pre-enrichment with the host bacteria, the spot test, and the double-layer method. Plaques were selected according to their morphology and lytic activity on the target bacteria. Clinical isolates and reference strains belonging to the ESKAPE group were the targets during phage isolation. A total of 210 lytic plaque morphotypes with activity against ESKAPE strains were isolated from 22 water samples. Each isolate was qualitatively evaluated for its ability to inhibit the growth of its host strain. Thirty-one translucent plaques with apparent lytic activity were selected for purification. Of these, 87.1% were isolated from wastewater samples, and 12.9% were isolated from flowing freshwater. Specifically, the phages isolated from the freshwater samples targeted Staphylococcus aureus strains, and no phage from Enterococcus faecium strains was isolated. In conclusion, wastewater samples are a suitable source for the isolation of exogenous lytic phages; however, freshwater could be considered an alternative source for the isolation of lytic phages.
噬菌体疗法是一种用于治疗抗菌药耐药性或顽固性细菌感染的有前途的策略。最近,由于多重耐药性的增加,噬菌体的临床用途被重新发现,并有可能在临床实践中作为一种额外的治疗选择。在这项研究中,对当地的市政污水处理设施、医院污水处理系统和淡水水库进行了评估,以确定是否存在溶解性噬菌体。这些噬菌体是采用传统的噬菌体分离技术分离出来的:水样采集和处理、宿主细菌预富集、斑点测试和双层法。根据噬菌体的形态和对目标细菌的溶菌活性选择噬菌体斑块。噬菌体分离过程中以 ESKAPE 组的临床分离菌株和参考菌株为目标。从 22 份水样中总共分离出 210 个对 ESKAPE 菌株有活性的溶菌斑形态。对每个分离物抑制宿主菌株生长的能力进行了定性评估。筛选出 31 个具有明显溶菌活性的半透明斑块进行纯化。其中,87.1%是从废水样本中分离出来的,12.9%是从流动的淡水中分离出来的。从淡水样本中分离出的噬菌体主要针对金黄色葡萄球菌菌株,没有从粪肠球菌菌株中分离出噬菌体。总之,废水样本是分离外源致死噬菌体的合适来源;然而,淡水也可被视为分离致死噬菌体的替代来源。
{"title":"Exploring Local Reservoirs for Bacteriophages with Therapeutic Potential against ESKAPE Pathogens","authors":"Alejandra Aidee Loera Piedra, Isamar Leticia Becerra Mejía, Brenda Luna Galicia, Sergio Francisco Martínez Díaz, Julieta Luna Herrera, Ma. Guadalupe Aguilera Arreola","doi":"10.3390/microbiolres15030098","DOIUrl":"https://doi.org/10.3390/microbiolres15030098","url":null,"abstract":"Bacteriophage therapy is a promising strategy used to treat antimicrobial-resistant or persistent bacterial infections. More recently, the clinical utility of bacteriophages has been rediscovered due to the rise of multi-drug resistance and their potential use in clinical practice as an additional treatment option. In this study, local municipal wastewater facilities, hospital wastewater systems, and freshwater reservoirs were evaluated for the presence of lytic bacteriophages. These phages were isolated using conventional phage isolation techniques: water sample collection and processing, pre-enrichment with the host bacteria, the spot test, and the double-layer method. Plaques were selected according to their morphology and lytic activity on the target bacteria. Clinical isolates and reference strains belonging to the ESKAPE group were the targets during phage isolation. A total of 210 lytic plaque morphotypes with activity against ESKAPE strains were isolated from 22 water samples. Each isolate was qualitatively evaluated for its ability to inhibit the growth of its host strain. Thirty-one translucent plaques with apparent lytic activity were selected for purification. Of these, 87.1% were isolated from wastewater samples, and 12.9% were isolated from flowing freshwater. Specifically, the phages isolated from the freshwater samples targeted Staphylococcus aureus strains, and no phage from Enterococcus faecium strains was isolated. In conclusion, wastewater samples are a suitable source for the isolation of exogenous lytic phages; however, freshwater could be considered an alternative source for the isolation of lytic phages.","PeriodicalId":43788,"journal":{"name":"Microbiology Research","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141925501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
New Insights into Molecular Characterization, Antimicrobial Resistance and Virulence Factors of Methicillin-Sensitive Coagulase-Positive Staphylococcus spp. from Dogs with Pyoderma and Otitis Externa 关于患有脓皮病和外耳道炎的狗体内对甲氧西林敏感的凝固酶阳性葡萄球菌的分子特征、抗菌药耐药性和致病因子的新见解
IF 2.1 Q3 MICROBIOLOGY Pub Date : 2024-07-12 DOI: 10.3390/microbiolres15030081
Faten Ben Chehida, W. Tombari, H. Gharsa, Youssef Rabia, Sana Ferhi, Maha Jrad, L. Messadi
The first Tunisian national molecular survey of coagulase-positive staphylococci (CoPS) isolated from dogs with pyoderma and otitis externa was conducted to evaluate the prevalence of CoPS and identify its phenotypic and genotypic diversities. A total of 99 out of the 195 samples collected from 39 sick dogs were identified across multiple sites as methicillin-susceptible CoPS belonging to the species S. pseudintermedius (64.4%), S. aureus (20.2%), S. coagulans (10.1%), and S. hyicus (5%). Fifteen sampled dogs carried more than one Staphylococcus species. Their antibiotic resistance and virulence factors were determined using conventional and molecular methods. Of the S. pseudintermedius isolates found, 17.4% were multidrug-resistant, whereas high rates of virulence genes were observed among the S. aureus isolates. On polystyrene surfaces, 75% of S. aureus isolates were biofilm producers, of which 15% were classified as strong producers. The capsular polysaccharide cap8 genotype was predominant among them. A MultiLocus Sequence Typing (MLST) analysis clustered the S.aureus isolates into five distinct sequence types (STs), with four assigned for the first time. Our findings highlight the spread of CoPS among diseased dogs and, especially, the emergence of S. hyicus, S. coagulans, multidrug-resistant S. pseudintermedius and S. aureus isolates with high genetic variability. The precise characterization of these strains, as well as their continuous monitoring, is necessary for the implementation of preventive strategies given the significant public health risk.
突尼斯首次对从患脓疱病和外耳道炎的狗身上分离出的凝固酶阳性葡萄球菌(CoPS)进行了全国性分子调查,以评估 CoPS 的流行率并确定其表型和基因型的多样性。在从 39 只病犬身上采集的 195 份样本中,共有 99 份在多个地点被鉴定为对甲氧西林敏感的 CoPS,分别属于假中间肠球菌(64.4%)、金黄色葡萄球菌(20.2%)、凝结球菌(10.1%)和希氏球菌(5%)。15 只采样犬携带一种以上的葡萄球菌。它们的抗生素耐药性和毒力因子是通过传统方法和分子方法确定的。在发现的假金黄色葡萄球菌分离株中,17.4%具有多重耐药性,而在金黄色葡萄球菌分离株中则观察到了高比率的毒力基因。在聚苯乙烯表面,75% 的金黄色葡萄球菌分离株是生物膜生产者,其中 15%属于强生产者。其中以帽状多糖 cap8 基因型为主。多焦点序列分型(MLST)分析将金黄色葡萄球菌分离株聚类为五种不同的序列类型(ST),其中四种类型为首次分配。我们的研究结果突显了 CoPS 在病犬中的传播,尤其是出现了具有高度遗传变异的 S.hyicus、S.coagulans、耐多药的 S.pseudintermedius 和 S.aureus 分离物。鉴于这些菌株对公众健康造成的重大风险,有必要对其进行精确定性和持续监测,以便实施预防战略。
{"title":"New Insights into Molecular Characterization, Antimicrobial Resistance and Virulence Factors of Methicillin-Sensitive Coagulase-Positive Staphylococcus spp. from Dogs with Pyoderma and Otitis Externa","authors":"Faten Ben Chehida, W. Tombari, H. Gharsa, Youssef Rabia, Sana Ferhi, Maha Jrad, L. Messadi","doi":"10.3390/microbiolres15030081","DOIUrl":"https://doi.org/10.3390/microbiolres15030081","url":null,"abstract":"The first Tunisian national molecular survey of coagulase-positive staphylococci (CoPS) isolated from dogs with pyoderma and otitis externa was conducted to evaluate the prevalence of CoPS and identify its phenotypic and genotypic diversities. A total of 99 out of the 195 samples collected from 39 sick dogs were identified across multiple sites as methicillin-susceptible CoPS belonging to the species S. pseudintermedius (64.4%), S. aureus (20.2%), S. coagulans (10.1%), and S. hyicus (5%). Fifteen sampled dogs carried more than one Staphylococcus species. Their antibiotic resistance and virulence factors were determined using conventional and molecular methods. Of the S. pseudintermedius isolates found, 17.4% were multidrug-resistant, whereas high rates of virulence genes were observed among the S. aureus isolates. On polystyrene surfaces, 75% of S. aureus isolates were biofilm producers, of which 15% were classified as strong producers. The capsular polysaccharide cap8 genotype was predominant among them. A MultiLocus Sequence Typing (MLST) analysis clustered the S.aureus isolates into five distinct sequence types (STs), with four assigned for the first time. Our findings highlight the spread of CoPS among diseased dogs and, especially, the emergence of S. hyicus, S. coagulans, multidrug-resistant S. pseudintermedius and S. aureus isolates with high genetic variability. The precise characterization of these strains, as well as their continuous monitoring, is necessary for the implementation of preventive strategies given the significant public health risk.","PeriodicalId":43788,"journal":{"name":"Microbiology Research","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141653067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Predictive Modeling of UV-C Inactivation of Microorganisms in Glass, Titanium, and Polyether Ether Ketone 玻璃、钛和聚醚醚酮中微生物的紫外线灭活预测模型
IF 2.1 Q3 MICROBIOLOGY Pub Date : 2024-07-05 DOI: 10.3390/microbiolres15030080
Amira Chroudi, Talita Nicolau, Narayan Sahoo, Ó. Carvalho, A. Zille, Samir Hamza, J. Padrão
Biomaterials consist of both natural and synthetic components, such as polymers, tissues, living cells, metals, and ceramics. Their purpose is focused on repairing or replacing malfunctioning living tissues and organs. Therefore, it is imperative to ensure the safety and sterility of biomaterials before any contact with living tissue. Ultraviolet (UV)-C irradiation for biomaterial disinfection has been considered due to the high recurrence rate of bacterial infections and to prevent resistance. Physical composition and surface properties and UV-C sensitivity of microorganisms can alter its efficacy. The main objective of this study was to evaluate the efficacy of UV-C in terms of microbial lethality and additional underlying factors contributing to its performance, namely the surface properties. For this purpose, twelve different strains were first screened, from which four microorganism species known to have the ability to cause nosocomial infections were further tested, namely Escherichia coli, Pseudomonas aeruginosa, Candida albicans, and Candida glabrata. These microorganisms were inoculated onto slides and disks of various bio contact surfaces, including glass (GLS), titanium (Ti), and poly ether etherketone (PEEK), and exposed to UV-C. The results demonstrate that bacterial pathogens on biomaterial surfaces respond differently to UV-C light exposure, and the bactericidal effect decreased in this order: glass, PEEK, and Ti (0.5 to 2.0 log reduction differences). P. aeruginosa ATCC 27853 on glass surfaces was reduced to an undetectable level after being exposed to 6.31 J.cm−2 of UV-C, displaying the highest reduction rate observed among all the tested microorganisms, 2.90 J−1.cm−3, compared to Ti and PEEK. Similarly, a higher reduction in C. glabrata ATCC 2001 was observed on glass; the modeled inhibition displayed a rate of 1.30 J−1.cm−3, the highest observed rate among yeast, compared to Ti and PEEK, displaying rates of 0.10 J−1.cm−3 and 0.04 J−1.cm−3, respectively. The inactivation rates were higher for less hydrophobic materials with smoother surfaces as compared to biomaterials with rougher surfaces.
生物材料由天然和合成成分组成,如聚合物、组织、活细胞、金属和陶瓷。它们的作用主要是修复或替代功能失常的活体组织和器官。因此,在与活体组织接触之前,必须确保生物材料的安全性和无菌性。由于细菌感染的复发率很高,为了防止细菌产生耐药性,人们考虑采用紫外线(UV)-C 照射对生物材料进行消毒。微生物的物理成分和表面特性以及对紫外线-C 的敏感性会改变其功效。本研究的主要目的是评估紫外线-C 在微生物致死率方面的功效,以及影响其性能的其他潜在因素,即表面特性。为此,研究人员首先筛选了 12 种不同的菌株,并进一步测试了其中 4 种已知能引起医院感染的微生物,即大肠杆菌、铜绿假单胞菌、白色念珠菌和白色念珠菌。将这些微生物接种到各种生物接触表面(包括玻璃(GLS)、钛(Ti)和聚醚醚酮(PEEK))的载玻片和磁盘上,然后暴露在紫外线-C 下。结果表明,生物材料表面上的细菌病原体对紫外线-C 光照射的反应不同,杀菌效果依次降低:玻璃、PEEK 和钛(降低对数相差 0.5 到 2.0)。玻璃表面上的铜绿假单胞菌 ATCC 27853 在暴露于 6.31 J.cm-2 的紫外线-C 后被减少到检测不到的水平,与钛和 PEEK 相比,铜绿假单胞菌 ATCC 27853 的减少率是所有测试微生物中最高的,达到 2.90 J-1.cm-3。同样,在玻璃上观察到的对 C. glabrata ATCC 2001 的抑制率更高;模型抑制率为 1.30 J-1.cm-3,是酵母菌中观察到的最高抑制率,而 Ti 和 PEEK 的抑制率分别为 0.10 J-1.cm-3 和 0.04 J-1.cm-3。与表面粗糙的生物材料相比,表面较光滑的疏水性较低的材料的灭活率较高。
{"title":"Predictive Modeling of UV-C Inactivation of Microorganisms in Glass, Titanium, and Polyether Ether Ketone","authors":"Amira Chroudi, Talita Nicolau, Narayan Sahoo, Ó. Carvalho, A. Zille, Samir Hamza, J. Padrão","doi":"10.3390/microbiolres15030080","DOIUrl":"https://doi.org/10.3390/microbiolres15030080","url":null,"abstract":"Biomaterials consist of both natural and synthetic components, such as polymers, tissues, living cells, metals, and ceramics. Their purpose is focused on repairing or replacing malfunctioning living tissues and organs. Therefore, it is imperative to ensure the safety and sterility of biomaterials before any contact with living tissue. Ultraviolet (UV)-C irradiation for biomaterial disinfection has been considered due to the high recurrence rate of bacterial infections and to prevent resistance. Physical composition and surface properties and UV-C sensitivity of microorganisms can alter its efficacy. The main objective of this study was to evaluate the efficacy of UV-C in terms of microbial lethality and additional underlying factors contributing to its performance, namely the surface properties. For this purpose, twelve different strains were first screened, from which four microorganism species known to have the ability to cause nosocomial infections were further tested, namely Escherichia coli, Pseudomonas aeruginosa, Candida albicans, and Candida glabrata. These microorganisms were inoculated onto slides and disks of various bio contact surfaces, including glass (GLS), titanium (Ti), and poly ether etherketone (PEEK), and exposed to UV-C. The results demonstrate that bacterial pathogens on biomaterial surfaces respond differently to UV-C light exposure, and the bactericidal effect decreased in this order: glass, PEEK, and Ti (0.5 to 2.0 log reduction differences). P. aeruginosa ATCC 27853 on glass surfaces was reduced to an undetectable level after being exposed to 6.31 J.cm−2 of UV-C, displaying the highest reduction rate observed among all the tested microorganisms, 2.90 J−1.cm−3, compared to Ti and PEEK. Similarly, a higher reduction in C. glabrata ATCC 2001 was observed on glass; the modeled inhibition displayed a rate of 1.30 J−1.cm−3, the highest observed rate among yeast, compared to Ti and PEEK, displaying rates of 0.10 J−1.cm−3 and 0.04 J−1.cm−3, respectively. The inactivation rates were higher for less hydrophobic materials with smoother surfaces as compared to biomaterials with rougher surfaces.","PeriodicalId":43788,"journal":{"name":"Microbiology Research","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141674442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Limosilactobacillus reuteri and Its Probiotic Potential against Cariogenic Bacteria 芦特氏柠檬乳杆菌及其对致癌细菌的益生潜力
IF 2.1 Q3 MICROBIOLOGY Pub Date : 2024-07-03 DOI: 10.3390/microbiolres15030079
Brianda Karina Félix-Sicairos, R. Martínez-Martínez, S. Aranda-Romo, Roberto González-Amaro, M. Salgado-Bustamante, N. V. Zavala-Alonso, Á. Alpuche-Solís
Bacteriotherapy is a promising option in addressing dental caries, a persistent global public health challenge with multifactorial origin, including dysbiosis. Despite the exploration of various probiotics, outcomes remain inconclusive. Objective: This study aimed to assess the inhibitory potential of L. reuteri and other potential probiotics like S. salivarius and S. oralis on the growth, adhesion, colonization, and viability of major cariogenic pathogens, comparing their probiotic efficacy. Methods: An in vitro experimental study was conducted, encompassing direct competition assays in solid and liquid co-culture tests and the characterization of adhesion to dental enamel and cell viability by life or death assay. Results: L. reuteri exhibited the significant inhibition of S. sobrinus and S. mutans growth in both solid and liquid cultures, with statistically notable differences. Scanning electron microscopy and confocal microscopy demonstrated reduced cariogenic biofilm formation when combined with L. reuteri, corroborated by diminished bacterial viability and decreased dental enamel coverage. These findings underscore L. reuteri’s potential as an effective agent in caries prevention. Conclusion: The study suggests L. reuteri could serve as an effective probiotic in bacteriotherapy against dental caries. It displayed substantial inhibitory activity in vitro against cariogenic bacteria, impeding biofilm formation and adhesion, thereby impacting cell viability.
细菌疗法是解决龋齿问题的一个很有前景的选择,龋齿是一个长期存在的全球性公共卫生挑战,其根源是多因素的,包括菌群失调。尽管对各种益生菌进行了研究,但结果仍不确定。研究目的本研究旨在评估 L. reuteri 和其他潜在益生菌(如唾液球菌和口腔球菌)对主要致龋病原体的生长、粘附、定植和存活的抑制潜力,并比较它们的益生菌功效。方法:体外实验研究进行了一项体外实验研究,包括固体和液体共培养试验中的直接竞争试验,以及牙釉质粘附性和细胞存活率的生死试验。研究结果在固体和液体培养物中,L. reuteri 对 S. sobrinus 和 S. mutans 的生长都有明显的抑制作用,在统计学上差异显著。扫描电子显微镜和共聚焦显微镜显示,与 L. reuteri 结合使用可减少致龋生物膜的形成,细菌存活率降低和牙釉质覆盖率降低也证实了这一点。这些发现凸显了L. reuteri作为一种有效防龋剂的潜力。结论:研究表明,L. reuteri 可作为一种有效的益生菌用于龋齿的细菌疗法。它在体外对致癌细菌有很强的抑制作用,能阻碍生物膜的形成和粘附,从而影响细胞的活力。
{"title":"Limosilactobacillus reuteri and Its Probiotic Potential against Cariogenic Bacteria","authors":"Brianda Karina Félix-Sicairos, R. Martínez-Martínez, S. Aranda-Romo, Roberto González-Amaro, M. Salgado-Bustamante, N. V. Zavala-Alonso, Á. Alpuche-Solís","doi":"10.3390/microbiolres15030079","DOIUrl":"https://doi.org/10.3390/microbiolres15030079","url":null,"abstract":"Bacteriotherapy is a promising option in addressing dental caries, a persistent global public health challenge with multifactorial origin, including dysbiosis. Despite the exploration of various probiotics, outcomes remain inconclusive. Objective: This study aimed to assess the inhibitory potential of L. reuteri and other potential probiotics like S. salivarius and S. oralis on the growth, adhesion, colonization, and viability of major cariogenic pathogens, comparing their probiotic efficacy. Methods: An in vitro experimental study was conducted, encompassing direct competition assays in solid and liquid co-culture tests and the characterization of adhesion to dental enamel and cell viability by life or death assay. Results: L. reuteri exhibited the significant inhibition of S. sobrinus and S. mutans growth in both solid and liquid cultures, with statistically notable differences. Scanning electron microscopy and confocal microscopy demonstrated reduced cariogenic biofilm formation when combined with L. reuteri, corroborated by diminished bacterial viability and decreased dental enamel coverage. These findings underscore L. reuteri’s potential as an effective agent in caries prevention. Conclusion: The study suggests L. reuteri could serve as an effective probiotic in bacteriotherapy against dental caries. It displayed substantial inhibitory activity in vitro against cariogenic bacteria, impeding biofilm formation and adhesion, thereby impacting cell viability.","PeriodicalId":43788,"journal":{"name":"Microbiology Research","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141681930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparative High-Throughput Sequencing Analysis of the Bacterial Community Associated with the Rhizosphere of Date Palm (Phoenix dactyllifera L.) Irrigated with Treated Wastewater and Groundwater 用处理过的废水和地下水灌溉枣椰树(Phoenix dactyllifera L.)根瘤菌相关细菌群落的高通量测序对比分析
IF 2.1 Q3 MICROBIOLOGY Pub Date : 2024-07-02 DOI: 10.3390/microbiolres15030078
F. Kouadri
Water scarcity is a major agricultural issue in most arid and semi-arid regions of the world. Alternative water supplies, such as the reuse of wastewater for agricultural irrigation, have been introduced. However, little is known about their impact on the soil and rhizosphere microbiomes that receive irrigation. Therefore, this work evaluates the impact of treated wastewater (TWW) irrigation on the soil and rhizosphere bacterial communities of date palms in Al Madinah, Saudi Arabia. In this study, metagenomic DNA from the rhizosphere of the date palm was sequenced using Illumina high-throughput sequencing. According to the observed OTUs, Chao1 richness estimations, and Shannon diversity values, soils from groundwater-irrigated date palms showed higher microbial diversity than did soils from TWW-irrigated date palms. A total of 569 OTUs were generated; most of them (97.3%) were assigned into 15 different phyla, whereas 2.7% were marked as unclassified. DNA sequence analysis of the WWT-irrigated rhizosphere showed that the most abundant phyla were Firmicutes (43.6%), Bacteroidetes (17.3%), Proteobacteria (15.2%), and Actinobacteria (14.6%), representing more than 90.7% of the total community, while the soil of the rhizosphere irrigated with GW was dominated by Actinobacteria (44.1%), Proteobacteria (23.4%), Firmicutes (15.5%), and Gemmatimonadetes (4.9%). The most frequently observed species in the two soils were also different. The dominant species in TWW-irrigated soil was Planococcus plakortidis, which is prevalent in saline and moderately saline habitats and can play an important ecological role. The GW-irrigated rhizosphere exhibited higher levels of biocontrol bacteria, particularly Nocardioides mesophilus. These results provide a comprehensive understanding and insights into the population dynamics and microbiome of date palm rhizosphere. The findings show that the irrigation water quality has a significant impact on the microbiome composition. Identifying the microbial diversity is the first step toward determining the best way to use TWW in irrigation.
缺水是世界上大多数干旱和半干旱地区的主要农业问题。替代水源,如将废水回用于农业灌溉,已被引入。然而,人们对其对接受灌溉的土壤和根瘤微生物群的影响知之甚少。因此,本研究评估了经处理的废水(TWW)灌溉对沙特阿拉伯马迪纳(Al Madinah)枣椰树土壤和根圈细菌群落的影响。在这项研究中,利用 Illumina 高通量测序技术对来自椰枣根圈的元基因组 DNA 进行了测序。根据观察到的 OTU、Chao1 丰富度估计值和香农多样性值,地下水灌溉的枣椰树土壤比 TWW 灌溉的枣椰树土壤显示出更高的微生物多样性。共产生了 569 个 OTUs,其中大部分(97.3%)被归入 15 个不同的门,2.7% 被标记为未分类。对 WWT 灌溉根瘤菌群的 DNA 序列分析表明,最丰富的菌门是固氮菌(43.6%)、类杆菌(17.3%)、变形菌(15.2%)和放线菌(14.6%),占整个群落的 90.7%以上。7%,而用 GW 灌溉的根圈土壤则以放线菌(44.1%)、变形菌(23.4%)、固着菌(15.5%)和革囊菌(4.9%)为主。在两种土壤中观察到的最常见物种也有所不同。荃湾水厂灌溉土壤中的优势物种是 Plakortidis Planococcus,它在盐碱地和中度盐碱地中很普遍,能发挥重要的生态作用。GW-irrigated rhizosphere 表现出较高水平的生物控制细菌,尤其是嗜中性嗜盐菌(Nocardioides mesophilus)。这些结果提供了对枣树根瘤菌群动态和微生物组的全面了解和见解。研究结果表明,灌溉水质对微生物组的组成有重大影响。确定微生物多样性是确定在灌溉中使用 TWW 的最佳方法的第一步。
{"title":"Comparative High-Throughput Sequencing Analysis of the Bacterial Community Associated with the Rhizosphere of Date Palm (Phoenix dactyllifera L.) Irrigated with Treated Wastewater and Groundwater","authors":"F. Kouadri","doi":"10.3390/microbiolres15030078","DOIUrl":"https://doi.org/10.3390/microbiolres15030078","url":null,"abstract":"Water scarcity is a major agricultural issue in most arid and semi-arid regions of the world. Alternative water supplies, such as the reuse of wastewater for agricultural irrigation, have been introduced. However, little is known about their impact on the soil and rhizosphere microbiomes that receive irrigation. Therefore, this work evaluates the impact of treated wastewater (TWW) irrigation on the soil and rhizosphere bacterial communities of date palms in Al Madinah, Saudi Arabia. In this study, metagenomic DNA from the rhizosphere of the date palm was sequenced using Illumina high-throughput sequencing. According to the observed OTUs, Chao1 richness estimations, and Shannon diversity values, soils from groundwater-irrigated date palms showed higher microbial diversity than did soils from TWW-irrigated date palms. A total of 569 OTUs were generated; most of them (97.3%) were assigned into 15 different phyla, whereas 2.7% were marked as unclassified. DNA sequence analysis of the WWT-irrigated rhizosphere showed that the most abundant phyla were Firmicutes (43.6%), Bacteroidetes (17.3%), Proteobacteria (15.2%), and Actinobacteria (14.6%), representing more than 90.7% of the total community, while the soil of the rhizosphere irrigated with GW was dominated by Actinobacteria (44.1%), Proteobacteria (23.4%), Firmicutes (15.5%), and Gemmatimonadetes (4.9%). The most frequently observed species in the two soils were also different. The dominant species in TWW-irrigated soil was Planococcus plakortidis, which is prevalent in saline and moderately saline habitats and can play an important ecological role. The GW-irrigated rhizosphere exhibited higher levels of biocontrol bacteria, particularly Nocardioides mesophilus. These results provide a comprehensive understanding and insights into the population dynamics and microbiome of date palm rhizosphere. The findings show that the irrigation water quality has a significant impact on the microbiome composition. Identifying the microbial diversity is the first step toward determining the best way to use TWW in irrigation.","PeriodicalId":43788,"journal":{"name":"Microbiology Research","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141685941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Factors Influencing Central Venous Catheter-Associated Bloodstream Infections in COVID-19 Patients 影响 COVID-19 患者中心静脉导管相关血流感染的因素
IF 2.1 Q3 MICROBIOLOGY Pub Date : 2024-07-02 DOI: 10.3390/microbiolres15030076
Adriana Lemos de Sousa Neto, Thalita Campos, C. Mendes-Rodrigues, Reginaldo dos Santos Pedroso, D. V. D. B. Röder
During the pandemic of COVID-19, the rates of bloodstream infection associated with venous catheter in patients infected with the disease admitted to an intensive care unit rose significantly. In this study, we evaluated the occurrence of bloodstream infections in patients with SARS-CoV-2 and the variables that made the patients more susceptible to the catheter-associated bloodstream infection (CABSI). Blood culture results from patients interned between March 2020 and December 2021 (n= 109) were collected electronically from the hospital information system and then analyzed. The following variables presented statistical relevance after an adjusted model as follows: obesity (p = 0.003) and time of use of catheter before infection (p = 0.019). In conclusion, patients with shorter catheter use time and obesity had higher incidence of CABSI.
在 COVID-19 大流行期间,入住重症监护病房的感染者中与静脉导管相关的血流感染率显著上升。在这项研究中,我们评估了 SARS-CoV-2 患者血流感染的发生率,以及导致患者更易发生导管相关血流感染(CABSI)的变量。研究人员从医院信息系统中收集了 2020 年 3 月至 2021 年 12 月期间住院患者(109 人)的血液培养结果,并对其进行了分析。经调整模型后,以下变量具有统计学相关性:肥胖(p = 0.003)和感染前使用导管的时间(p = 0.019)。总之,导管使用时间较短和肥胖的患者 CABSI 发生率较高。
{"title":"Factors Influencing Central Venous Catheter-Associated Bloodstream Infections in COVID-19 Patients","authors":"Adriana Lemos de Sousa Neto, Thalita Campos, C. Mendes-Rodrigues, Reginaldo dos Santos Pedroso, D. V. D. B. Röder","doi":"10.3390/microbiolres15030076","DOIUrl":"https://doi.org/10.3390/microbiolres15030076","url":null,"abstract":"During the pandemic of COVID-19, the rates of bloodstream infection associated with venous catheter in patients infected with the disease admitted to an intensive care unit rose significantly. In this study, we evaluated the occurrence of bloodstream infections in patients with SARS-CoV-2 and the variables that made the patients more susceptible to the catheter-associated bloodstream infection (CABSI). Blood culture results from patients interned between March 2020 and December 2021 (n= 109) were collected electronically from the hospital information system and then analyzed. The following variables presented statistical relevance after an adjusted model as follows: obesity (p = 0.003) and time of use of catheter before infection (p = 0.019). In conclusion, patients with shorter catheter use time and obesity had higher incidence of CABSI.","PeriodicalId":43788,"journal":{"name":"Microbiology Research","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141687385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Plant Growth-Promoting and Tequila Vinasse-Resistant Bacterial Strains 促进植物生长和耐龙舌兰酒渣的细菌菌株
IF 2.1 Q3 MICROBIOLOGY Pub Date : 2024-07-02 DOI: 10.3390/microbiolres15030077
A. Valencia-Botín, Ismael F. Chávez-Díaz, Florentina Zurita-Martínez, Allan Tejeda-Ortega, L. Zelaya-Molina
Tequila vinasse, a byproduct of the tequila industry, is frequently discharged into water bodies or agricultural fields, posing significant ecological and human health risks. Bacterial communities that inhabit these agricultural fields have developed mechanisms to utilize tequila vinasse as a potential nutrient source and to promote plant growth. In this study, strains from the phyla Actinomycetota and Pseudomonadota were isolated from agricultural fields irrigated with tequila vinasse for 2, 10, and 14 years in Jalisco, Mexico. The results showed that strains of Terrabacter, Azotobacter, Agromyces, Prescottella, and Leifsonia tolerate high concentrations of tequila vinasse and promote maize seedling growth in the presence of tequila vinasse. Additionally, some of the strains solubilize potassium and produce siderophores, cellulase, protease, lipase, and esterase. The strains Terrabacter sp. WCNS1C, Azotobacter sp. WCNS1D, and Azotobacter sp. WCNS2A have potential applications in the bioremediation of tequila vinasse in agricultural fields discharged with tequila vinasse.
龙舌兰酒渣是龙舌兰酒业的副产品,经常被排放到水体或农田中,对生态和人类健康造成严重危害。栖息在这些农田中的细菌群落已经形成了利用龙舌兰酒渣作为潜在营养源和促进植物生长的机制。本研究从墨西哥哈利斯科州使用龙舌兰酒渣灌溉 2 年、10 年和 14 年的农田中分离出放线菌门和假单胞菌门的菌株。结果表明,Terrabacter、Azotobacter、Agromyces、Prescottella 和 Leifsonia 菌株能耐受高浓度的龙舌兰酒渣,并能在龙舌兰酒渣的作用下促进玉米幼苗的生长。此外,一些菌株还能溶解钾,并产生苷酸、纤维素酶、蛋白酶、脂肪酶和酯酶。WCNS1C、WCNS1D 和 WCNS2A 等菌株在龙舌兰酒渣农田的生物修复中具有潜在的应用价值。
{"title":"Plant Growth-Promoting and Tequila Vinasse-Resistant Bacterial Strains","authors":"A. Valencia-Botín, Ismael F. Chávez-Díaz, Florentina Zurita-Martínez, Allan Tejeda-Ortega, L. Zelaya-Molina","doi":"10.3390/microbiolres15030077","DOIUrl":"https://doi.org/10.3390/microbiolres15030077","url":null,"abstract":"Tequila vinasse, a byproduct of the tequila industry, is frequently discharged into water bodies or agricultural fields, posing significant ecological and human health risks. Bacterial communities that inhabit these agricultural fields have developed mechanisms to utilize tequila vinasse as a potential nutrient source and to promote plant growth. In this study, strains from the phyla Actinomycetota and Pseudomonadota were isolated from agricultural fields irrigated with tequila vinasse for 2, 10, and 14 years in Jalisco, Mexico. The results showed that strains of Terrabacter, Azotobacter, Agromyces, Prescottella, and Leifsonia tolerate high concentrations of tequila vinasse and promote maize seedling growth in the presence of tequila vinasse. Additionally, some of the strains solubilize potassium and produce siderophores, cellulase, protease, lipase, and esterase. The strains Terrabacter sp. WCNS1C, Azotobacter sp. WCNS1D, and Azotobacter sp. WCNS2A have potential applications in the bioremediation of tequila vinasse in agricultural fields discharged with tequila vinasse.","PeriodicalId":43788,"journal":{"name":"Microbiology Research","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141684583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Microbiology Research
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1