G. N. Hernández-Acevedo, R. Gónzalez-Vázquez, Diana Reyes-Pavón, Edgard Torres-Maravilla
According to the World Health Organization (WHO), tuberculosis (TB) remains a significant global health challenge, with approximately 10 million new cases and 1.4 million deaths reported in 2020. TB disproportionately affects low- and middle-income countries, where factors such as migrant population, malnutrition, type 2 diabetes, human immunodeficiency virus (HIV) co-infection, and COVID-19 exacerbate its impact. TB also leads to substantial economic losses due to decreased productivity and high healthcare costs. Despite advances in treatments, TB remains a major public health issue, particularly in poorer regions. In Mexico, TB is considered a moderate-incidence disease, with higher prevalence in border states, mainly due to population displacements. Effective TB control requires collaboration between Mexico and the United States of America given the high cross-border human movement, like in the Baja California State that reported predominantly pulmonary TB cases. Effective management of TB involves rapid diagnosis and identification of antibiotic resistance. Techniques such as PCR, high-resolution computed tomography (HRCT), and/or Xpert MTB/RIF have enhanced diagnostic accuracy. Future perspectives about TB management focus on developing new drugs and vaccines to combat drug-resistant strains, and the comorbidities associated, which must be addressed to reinforce of health public programs.
{"title":"Tuberculosis Infection and Comorbidities: A Public Health Issue in Baja California, Mexico","authors":"G. N. Hernández-Acevedo, R. Gónzalez-Vázquez, Diana Reyes-Pavón, Edgard Torres-Maravilla","doi":"10.3390/bacteria3030014","DOIUrl":"https://doi.org/10.3390/bacteria3030014","url":null,"abstract":"According to the World Health Organization (WHO), tuberculosis (TB) remains a significant global health challenge, with approximately 10 million new cases and 1.4 million deaths reported in 2020. TB disproportionately affects low- and middle-income countries, where factors such as migrant population, malnutrition, type 2 diabetes, human immunodeficiency virus (HIV) co-infection, and COVID-19 exacerbate its impact. TB also leads to substantial economic losses due to decreased productivity and high healthcare costs. Despite advances in treatments, TB remains a major public health issue, particularly in poorer regions. In Mexico, TB is considered a moderate-incidence disease, with higher prevalence in border states, mainly due to population displacements. Effective TB control requires collaboration between Mexico and the United States of America given the high cross-border human movement, like in the Baja California State that reported predominantly pulmonary TB cases. Effective management of TB involves rapid diagnosis and identification of antibiotic resistance. Techniques such as PCR, high-resolution computed tomography (HRCT), and/or Xpert MTB/RIF have enhanced diagnostic accuracy. Future perspectives about TB management focus on developing new drugs and vaccines to combat drug-resistant strains, and the comorbidities associated, which must be addressed to reinforce of health public programs.","PeriodicalId":502262,"journal":{"name":"Bacteria","volume":"38 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141924190","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}
Antimicrobial resistance is a significant public health issue. The unprecedented spread of antimicrobial-resistant organisms has been identified by the World Health Organization as one of the leading healthcare threats. Projections for annual worldwide deaths attributed to antimicrobial resistance approach 10 million by 2050, with an associated economic burden of USD 100 trillion. This paper reviews the mechanisms known to contribute to antimicrobial resistance and provides insight into potential available alternatives to conventional antibiotics. Antimicrobial approaches addressed include dual antibiotic therapy, antimicrobial peptides, monoclonal antibodies, bacteriophages, probiotics, nanomaterials, and cannabinoids. Key pathogens in need of antimicrobials referred to as the ESKAPE pathogens are discussed.
{"title":"Antimicrobial Resistance and Novel Alternative Approaches to Conventional Antibiotics","authors":"Irene Berger, Z. Loewy","doi":"10.3390/bacteria3030012","DOIUrl":"https://doi.org/10.3390/bacteria3030012","url":null,"abstract":"Antimicrobial resistance is a significant public health issue. The unprecedented spread of antimicrobial-resistant organisms has been identified by the World Health Organization as one of the leading healthcare threats. Projections for annual worldwide deaths attributed to antimicrobial resistance approach 10 million by 2050, with an associated economic burden of USD 100 trillion. This paper reviews the mechanisms known to contribute to antimicrobial resistance and provides insight into potential available alternatives to conventional antibiotics. Antimicrobial approaches addressed include dual antibiotic therapy, antimicrobial peptides, monoclonal antibodies, bacteriophages, probiotics, nanomaterials, and cannabinoids. Key pathogens in need of antimicrobials referred to as the ESKAPE pathogens are discussed.","PeriodicalId":502262,"journal":{"name":"Bacteria","volume":"79 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141817649","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}
Background: Several Acinetobacter species live in different ecosystems, such as soil, freshwater, wastewater, and solid wastes, which has attracted considerable research interests in public health and agriculture. Methods: We assessed the distribution of Acinetobacter baumannii and Acinetobacter nosocomialis in three freshwater resources (Great Fish, Keiskemma, and Tyhume rivers) in South Africa between April 2017–March 2018. Molecular identification of Acinetobacter species was performed using Acinetobacter-specific primers targeting the recA gene, whilst confirmed species were further delineated into A. baumannii and A. nosocomialis. Similarly, virulence genes; afa/draBC, epsA, fimH, OmpA, PAI, sfa/focDE, and traT in the two Acinetobacter species were assessed. Results: Our finding revealed that 410 (48.58%) and 23 (2.7%) of the isolates were confirmed as A. baumannii and A. nosocomalis, respectively. Additionally, three hundred and eight (75.12%) A. baumannii and three (13.04%) A. nosocomialis exhibited one or more of the virulence genes among the seven tested. OmpA was the most prevalent virulence gene in A. baumannii in freshwater sources. Conclusions: The distribution of clinically important Acinetobacter species in the freshwater sources studied suggests possible contamination such as the release of hospital wastewater and other clinical wastes into the environment thereby posing a risk to public health.
{"title":"Distribution and Molecular Characterization of Clinically Relevant Acinetobacter Species from Selected Freshwater Sources in the Eastern Cape Province, South Africa","authors":"M. A. Adewoyin, A. M. Ogunmolasuyi, A. Okoh","doi":"10.3390/bacteria3030011","DOIUrl":"https://doi.org/10.3390/bacteria3030011","url":null,"abstract":"Background: Several Acinetobacter species live in different ecosystems, such as soil, freshwater, wastewater, and solid wastes, which has attracted considerable research interests in public health and agriculture. Methods: We assessed the distribution of Acinetobacter baumannii and Acinetobacter nosocomialis in three freshwater resources (Great Fish, Keiskemma, and Tyhume rivers) in South Africa between April 2017–March 2018. Molecular identification of Acinetobacter species was performed using Acinetobacter-specific primers targeting the recA gene, whilst confirmed species were further delineated into A. baumannii and A. nosocomialis. Similarly, virulence genes; afa/draBC, epsA, fimH, OmpA, PAI, sfa/focDE, and traT in the two Acinetobacter species were assessed. Results: Our finding revealed that 410 (48.58%) and 23 (2.7%) of the isolates were confirmed as A. baumannii and A. nosocomalis, respectively. Additionally, three hundred and eight (75.12%) A. baumannii and three (13.04%) A. nosocomialis exhibited one or more of the virulence genes among the seven tested. OmpA was the most prevalent virulence gene in A. baumannii in freshwater sources. Conclusions: The distribution of clinically important Acinetobacter species in the freshwater sources studied suggests possible contamination such as the release of hospital wastewater and other clinical wastes into the environment thereby posing a risk to public health.","PeriodicalId":502262,"journal":{"name":"Bacteria","volume":"106 35","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141821787","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}
Nitin S. Kamble, S. Bera, Sanjivani A. Bhedase, Vinita Gaur, Debabrata Chowdhury
It is imperative to say that we are immersed in a sea of microorganisms due to their ubiquitous presence on the planet, from soil to water and air. Human bodies harbor a vast array of microorganisms from both the inside and out called the human microbiome. It is composed of single-celled organisms, including archaea, fungi, viruses, and bacteria, including bacteriophages, where bacteria are the biggest players, and this is collectively referred to as the human microbiome. These organisms have a symbiotic relationship with humans and impact human physiology where they colonize various sites on and in the human body, adapting to specific features of each niche. However, dysbiosis, or the deviation from normal microbial composition, is associated with adverse health effects, disrupted ecosystems, and eco-imbalance in nature. In this review, we delve into the comprehensive oversight of bacteria, their cosmopolitan presence, and their additional applications affecting human lives.
{"title":"Review on Applied Applications of Microbiome on Human Lives","authors":"Nitin S. Kamble, S. Bera, Sanjivani A. Bhedase, Vinita Gaur, Debabrata Chowdhury","doi":"10.3390/bacteria3030010","DOIUrl":"https://doi.org/10.3390/bacteria3030010","url":null,"abstract":"It is imperative to say that we are immersed in a sea of microorganisms due to their ubiquitous presence on the planet, from soil to water and air. Human bodies harbor a vast array of microorganisms from both the inside and out called the human microbiome. It is composed of single-celled organisms, including archaea, fungi, viruses, and bacteria, including bacteriophages, where bacteria are the biggest players, and this is collectively referred to as the human microbiome. These organisms have a symbiotic relationship with humans and impact human physiology where they colonize various sites on and in the human body, adapting to specific features of each niche. However, dysbiosis, or the deviation from normal microbial composition, is associated with adverse health effects, disrupted ecosystems, and eco-imbalance in nature. In this review, we delve into the comprehensive oversight of bacteria, their cosmopolitan presence, and their additional applications affecting human lives.","PeriodicalId":502262,"journal":{"name":"Bacteria","volume":"52 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141659954","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}
Fernanda Diniz Prates, Max Roberto Batista Araújo, Eduarda Guimarães Sousa, Juliana Nunes Ramos, M. Viana, S. Soares, L. S. dos Santos, V. Azevedo
Corynebacterium rouxii is one of the recently described species of the Corynebacterium diphtheriae complex. As this species can potentially infect different hosts and harbor the tox gene, producing diphtheria toxin, we present its first pangenomic analysis in this work. A total of fifteen genomes deposited in online databases were included. After confirming the taxonomic position of the isolates by genomic taxonomy, the genomes were submitted to genomic plasticity, gene synteny, and pangenome prediction analyses. In addition, virulence and antimicrobial resistance genes were investigated. Finally, epidemiological data were obtained through molecular typing, clustering, and phylogenetic analysis. Our data demonstrated genetic diversity within the species with low synteny. However, the gene content is extensively conserved, and the pangenome is composed of 2606 gene families, of which 1916 are in the core genome and 80 are related to unique genes. Prophages, insertion sequences, and genomic islands were found. A type I-E CRISPR-Cas system was also detected. Besides the tox gene, determinants involved in adhesion and iron acquisition and two putative antimicrobial resistance genes were predicted. These findings provide valuable insight about this species’ pathogenicity, evolution, and diversity. In the future, our data can contribute to different areas, including vaccinology and epidemiology.
{"title":"First Pangenome of Corynebacterium rouxii, a Potentially Toxigenic Species of Corynebacterium diphtheriae Complex","authors":"Fernanda Diniz Prates, Max Roberto Batista Araújo, Eduarda Guimarães Sousa, Juliana Nunes Ramos, M. Viana, S. Soares, L. S. dos Santos, V. Azevedo","doi":"10.3390/bacteria3020007","DOIUrl":"https://doi.org/10.3390/bacteria3020007","url":null,"abstract":"Corynebacterium rouxii is one of the recently described species of the Corynebacterium diphtheriae complex. As this species can potentially infect different hosts and harbor the tox gene, producing diphtheria toxin, we present its first pangenomic analysis in this work. A total of fifteen genomes deposited in online databases were included. After confirming the taxonomic position of the isolates by genomic taxonomy, the genomes were submitted to genomic plasticity, gene synteny, and pangenome prediction analyses. In addition, virulence and antimicrobial resistance genes were investigated. Finally, epidemiological data were obtained through molecular typing, clustering, and phylogenetic analysis. Our data demonstrated genetic diversity within the species with low synteny. However, the gene content is extensively conserved, and the pangenome is composed of 2606 gene families, of which 1916 are in the core genome and 80 are related to unique genes. Prophages, insertion sequences, and genomic islands were found. A type I-E CRISPR-Cas system was also detected. Besides the tox gene, determinants involved in adhesion and iron acquisition and two putative antimicrobial resistance genes were predicted. These findings provide valuable insight about this species’ pathogenicity, evolution, and diversity. In the future, our data can contribute to different areas, including vaccinology and epidemiology.","PeriodicalId":502262,"journal":{"name":"Bacteria","volume":"20 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140967301","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}
The current healthcare environment is at risk due to the facilitated transmission and empowerment of the ESKAPE pathogens, comprising of Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species. These pathogens have posed significant challenges to global public health and the threat has only amplified over time. These multidrug-resistant bacteria have become adept at escaping the effects of conventional antibiotics utilized, leading to severe healthcare-associated infections and compromising immunocompromised patient outcomes to a greater extent. The impact of ESKAPE pathogens is evident in the rapidly rising rates of treatment failures, increased mortality, and elevated healthcare costs. To combat this looming crisis, diverse strategies have been adopted, ranging from the development of novel antimicrobial agents and combination therapies to the implementation of stringent infection control measures. Additionally, there has been a growing emphasis on promoting antimicrobial stewardship programs to optimize the use of existing antibiotics and reduce the selective pressure driving the evolution of resistance. While progress has been made to some extent, the rapid adaptability of these pathogens and the enhancement of antimicrobial resistance mechanisms proves to be a major hurdle yet to be crossed by healthcare professionals. In this viewpoint, the impending threat heralded by the proliferation of ESKAPE pathogens, and the need for a concerted global effort via international collaborations for the assurance of effective and sustainable solutions, are explored. To curb the possibility of outbreaks in the future and to safeguard public health, better preparation via global awareness and defense mechanisms should be given paramount importance.
{"title":"ESKAPE: Navigating the Global Battlefield for Antimicrobial Resistance and Defense in Hospitals","authors":"Kamna Ravi, Baljit Singh","doi":"10.3390/bacteria3020006","DOIUrl":"https://doi.org/10.3390/bacteria3020006","url":null,"abstract":"The current healthcare environment is at risk due to the facilitated transmission and empowerment of the ESKAPE pathogens, comprising of Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species. These pathogens have posed significant challenges to global public health and the threat has only amplified over time. These multidrug-resistant bacteria have become adept at escaping the effects of conventional antibiotics utilized, leading to severe healthcare-associated infections and compromising immunocompromised patient outcomes to a greater extent. The impact of ESKAPE pathogens is evident in the rapidly rising rates of treatment failures, increased mortality, and elevated healthcare costs. To combat this looming crisis, diverse strategies have been adopted, ranging from the development of novel antimicrobial agents and combination therapies to the implementation of stringent infection control measures. Additionally, there has been a growing emphasis on promoting antimicrobial stewardship programs to optimize the use of existing antibiotics and reduce the selective pressure driving the evolution of resistance. While progress has been made to some extent, the rapid adaptability of these pathogens and the enhancement of antimicrobial resistance mechanisms proves to be a major hurdle yet to be crossed by healthcare professionals. In this viewpoint, the impending threat heralded by the proliferation of ESKAPE pathogens, and the need for a concerted global effort via international collaborations for the assurance of effective and sustainable solutions, are explored. To curb the possibility of outbreaks in the future and to safeguard public health, better preparation via global awareness and defense mechanisms should be given paramount importance.","PeriodicalId":502262,"journal":{"name":"Bacteria","volume":"135 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140698490","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}
Asma Hasan, B. Tabassum, Mohammad Hashim, Nagma Khan
The rhizosphere of a plant is home to helpful microorganisms called plant growth-promoting rhizobacteria (PGPR), which play a crucial role in promoting plant growth and development. The significance of PGPR for long-term agricultural viability is outlined in this review. Plant growth processes such as nitrogen fixation, phosphate solubilization, and hormone secretion are discussed. Increased plant tolerance to biotic and abiotic stress, reduced use of chemical fertilizers and pesticides, and enhanced nutrient availability, soil fertility, and absorption are all mentioned as potential benefits of PGPR. PGPR has multiple ecological and practical functions in the soil’s rhizosphere. One of PGPR’s various roles in agroecosystems is to increase the synthesis of phytohormones and other metabolites, which have a direct impact on plant growth. Phytopathogens can be stopped in their tracks, a plant’s natural defenses can be bolstered, and so on. PGPR also helps clean up the soil through a process called bioremediation. The PGPR’s many functions include indole acetic acid (IAA) production, ammonia (NH3) production, hydrogen cyanide (HCN) production, catalase production, and more. In addition to aiding in nutrient uptake, PGPR controls the production of a hormone that increases root size and strength. Improving crop yield, decreasing environmental pollution, and guaranteeing food security are only some of the ecological and economic benefits of employing PGPR for sustainable agriculture.
{"title":"Role of Plant Growth Promoting Rhizobacteria (PGPR) as a Plant Growth Enhancer for Sustainable Agriculture: A Review","authors":"Asma Hasan, B. Tabassum, Mohammad Hashim, Nagma Khan","doi":"10.3390/bacteria3020005","DOIUrl":"https://doi.org/10.3390/bacteria3020005","url":null,"abstract":"The rhizosphere of a plant is home to helpful microorganisms called plant growth-promoting rhizobacteria (PGPR), which play a crucial role in promoting plant growth and development. The significance of PGPR for long-term agricultural viability is outlined in this review. Plant growth processes such as nitrogen fixation, phosphate solubilization, and hormone secretion are discussed. Increased plant tolerance to biotic and abiotic stress, reduced use of chemical fertilizers and pesticides, and enhanced nutrient availability, soil fertility, and absorption are all mentioned as potential benefits of PGPR. PGPR has multiple ecological and practical functions in the soil’s rhizosphere. One of PGPR’s various roles in agroecosystems is to increase the synthesis of phytohormones and other metabolites, which have a direct impact on plant growth. Phytopathogens can be stopped in their tracks, a plant’s natural defenses can be bolstered, and so on. PGPR also helps clean up the soil through a process called bioremediation. The PGPR’s many functions include indole acetic acid (IAA) production, ammonia (NH3) production, hydrogen cyanide (HCN) production, catalase production, and more. In addition to aiding in nutrient uptake, PGPR controls the production of a hormone that increases root size and strength. Improving crop yield, decreasing environmental pollution, and guaranteeing food security are only some of the ecological and economic benefits of employing PGPR for sustainable agriculture.","PeriodicalId":502262,"journal":{"name":"Bacteria","volume":"940 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140774853","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}
Ricardo S Aleman, Franklin Delarca, M. Sarmientos, Jhunior Marcía, Ajitesh Yaday, Aryana Kayanush
Nipple fruit (Solanum mammosum), teosinte (Dioon mejiae), Caesar mushroom (Amanita caesarea), and weevil (Rhynchophorus palmarum) powders have shown great nutritional content with meaningful dietary applications. This study aspired to investigate the impact of nipple fruit, teosinte, Caesar mushroom, and weevil powders on the bile tolerance, acid tolerance, lysozyme tolerance, gastric juice resistance, and protease activity of Lactobacillus casei. Nipple fruit, teosinte, Caesar mushroom, and weevil powders were combined at 2% (wt/vol), whereas the control samples did not include the ingredients. The bile and acid tolerances were analyzed in Difco De Man–Rogosa–Sharpe broth incubated under aerobic conditions at 37 °C. The bile tolerance was investigated by adding 0.3% oxgall, whereas the acid tolerance was studied by modifying the pH to 2.0. The lysozyme tolerance was studied in electrolyte solution containing lysozyme (100 mg/L), while the gastric juice tolerance was analyzed at pH levels of 2, 3, 4, 5, and 7. The protease activity was studied spectrophotometrically at 340 nm in skim milk incubated under aerobic conditions at 37 °C. The results show that nipple fruit increased the counts, whereas Caesar mushroom and weevil powders resulted in lower counts for bile tolerance, acid tolerance, lysozyme resistance, and simulated gastric juice tolerance characteristics. Furthermore, the protease activity increased by adding nipple fruit to skim milk. According to the results, nipple fruit may improve the characteristics of L. casei in cultured dairy by-products.
{"title":"Impact of Novel Functional Ingredients on Lactobacillus casei Viability","authors":"Ricardo S Aleman, Franklin Delarca, M. Sarmientos, Jhunior Marcía, Ajitesh Yaday, Aryana Kayanush","doi":"10.3390/bacteria3010003","DOIUrl":"https://doi.org/10.3390/bacteria3010003","url":null,"abstract":"Nipple fruit (Solanum mammosum), teosinte (Dioon mejiae), Caesar mushroom (Amanita caesarea), and weevil (Rhynchophorus palmarum) powders have shown great nutritional content with meaningful dietary applications. This study aspired to investigate the impact of nipple fruit, teosinte, Caesar mushroom, and weevil powders on the bile tolerance, acid tolerance, lysozyme tolerance, gastric juice resistance, and protease activity of Lactobacillus casei. Nipple fruit, teosinte, Caesar mushroom, and weevil powders were combined at 2% (wt/vol), whereas the control samples did not include the ingredients. The bile and acid tolerances were analyzed in Difco De Man–Rogosa–Sharpe broth incubated under aerobic conditions at 37 °C. The bile tolerance was investigated by adding 0.3% oxgall, whereas the acid tolerance was studied by modifying the pH to 2.0. The lysozyme tolerance was studied in electrolyte solution containing lysozyme (100 mg/L), while the gastric juice tolerance was analyzed at pH levels of 2, 3, 4, 5, and 7. The protease activity was studied spectrophotometrically at 340 nm in skim milk incubated under aerobic conditions at 37 °C. The results show that nipple fruit increased the counts, whereas Caesar mushroom and weevil powders resulted in lower counts for bile tolerance, acid tolerance, lysozyme resistance, and simulated gastric juice tolerance characteristics. Furthermore, the protease activity increased by adding nipple fruit to skim milk. According to the results, nipple fruit may improve the characteristics of L. casei in cultured dairy by-products.","PeriodicalId":502262,"journal":{"name":"Bacteria","volume":"110 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140228346","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}
A variety of agrochemicals, especially fertilizers, are applied indiscriminately by farmers across trapezoidal landscapes to increase productivity and satisfy the rising food demand. Around one-third of the populace in developing nations is susceptible to zinc (Zn) deficiency as a result of their direct reliance on cereals as a source of calories. Zinc, an essential micronutrient for plants, performs several critical functions throughout the life cycle of a plant. Zinc is frequently disregarded, due to its indirect contribution to the enhancement of yield. Soil Zn deficiency is one of the most prevalent micronutrient deficiencies that reduces crop yield. A deficiency of Zn in both plants and soils results from the presence of Zn in fixed forms that are inaccessible to plants, which characterizes the majority of agricultural soils. As a result, alternative and environmentally sustainable methods are required to satisfy the demand for food. It appears that the application of zinc-solubilizing bacteria (ZSB) for sustainable agriculture is feasible. Inoculating plants with ZSB is likely a more efficacious strategy for augmenting Zn translocation in diverse edible plant components. ZSB possessing plant growth-promoting characteristics can serve as bio-elicitors to promote sustainable plant growth, through various methods that are vital to the health and productivity of plants. This review provides an analysis of the efficacy of ZSB, the functional characteristics of ZSB-mediated Zn localization, the mechanism underlying Zn solubilization, and the implementation of ZSB to increase crop yield.
{"title":"Harnessing the Power of Zinc-Solubilizing Bacteria: A Catalyst for a Sustainable Agrosystem","authors":"Swapnil Singh, Rohit Chhabra, Ashish Sharma, Aditi Bisht","doi":"10.3390/bacteria3010002","DOIUrl":"https://doi.org/10.3390/bacteria3010002","url":null,"abstract":"A variety of agrochemicals, especially fertilizers, are applied indiscriminately by farmers across trapezoidal landscapes to increase productivity and satisfy the rising food demand. Around one-third of the populace in developing nations is susceptible to zinc (Zn) deficiency as a result of their direct reliance on cereals as a source of calories. Zinc, an essential micronutrient for plants, performs several critical functions throughout the life cycle of a plant. Zinc is frequently disregarded, due to its indirect contribution to the enhancement of yield. Soil Zn deficiency is one of the most prevalent micronutrient deficiencies that reduces crop yield. A deficiency of Zn in both plants and soils results from the presence of Zn in fixed forms that are inaccessible to plants, which characterizes the majority of agricultural soils. As a result, alternative and environmentally sustainable methods are required to satisfy the demand for food. It appears that the application of zinc-solubilizing bacteria (ZSB) for sustainable agriculture is feasible. Inoculating plants with ZSB is likely a more efficacious strategy for augmenting Zn translocation in diverse edible plant components. ZSB possessing plant growth-promoting characteristics can serve as bio-elicitors to promote sustainable plant growth, through various methods that are vital to the health and productivity of plants. This review provides an analysis of the efficacy of ZSB, the functional characteristics of ZSB-mediated Zn localization, the mechanism underlying Zn solubilization, and the implementation of ZSB to increase crop yield.","PeriodicalId":502262,"journal":{"name":"Bacteria","volume":"21 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140434819","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}
Abdullah Al Amin, Md. Hosen Ali, Md. Morshedul Islam, S. Chakraborty, Muhammad Humayun Kabir, M. A. R. Khokon
Bakanae is one of the important diseases of rice in Bangladesh that causes substantial yield loss every year. We collected thirty isolates of Fusarium spp. from bakanae-infected rice plants from different agroecological zones of Bangladesh and investigated the variations in cultural and morphological characteristics and pathogenicity. Diversity was found in cultural characteristics, viz., colony features, phialide, chlamydospore formation, shape, and size of macro- and microconidia. Three variants of Fusarium species such as F. moniliforme, F. fujikuroi, and F. proliferatum were identified on PDA media based on their cultural and morphological characteristics. Isolate FM10 (F. moniliforme) exhibited the highest disease aggressiveness in developing elongated plants (26.50 cm), the highest number of chlorotic leaves (5.75), and a lower germination percentage. We evaluated different bioagents against the virulent isolate of F. moniliforme to develop a rice bakanae disease management approach. Four bioagents, viz., Trichoderma spp., Bacillus subtilis, Pseudomonas fluorescens, and Achromobacter spp., were evaluated for growth suppression of F. moniliforme. Among the bioagents, Achromobacter spp. and B. subtilis (BS21) showed 73.54% and 71.61% growth suppression, respectively. The investigation revealed that the application of Achromobacter spp. and B. subtilis (BS21) would be a potential candidate for effective and eco-friendly management of the bakanae disease of rice.
Bakanae 是孟加拉国水稻的重要病害之一，每年都会造成大量减产。我们从孟加拉不同农业生态区受巴卡纳氏菌感染的水稻植株上收集了 30 株镰刀菌属分离物，并研究了其文化和形态特征以及致病性的变化。研究发现，菌落特征、噬菌体、衣壳孢子的形成、形状以及大锥体和小锥体的大小都具有多样性。根据其培养和形态特征，在 PDA 培养基上鉴定出三种镰刀菌变种，如 F. moniliforme、F. fujikuroi 和 F. proliferatum。FM10（F. moniliforme）表现出最高的侵染性，植株变长（26.50 厘米），枯萎叶片数最多（5.75），发芽率较低。我们针对 F. moniliforme 的毒力分离株评估了不同的生物制剂，以开发一种水稻白粉病管理方法。我们评估了四种生物制剂（即毛霉菌属、枯草芽孢杆菌、荧光假单胞菌和 Achromobacter 菌属）对 F. moniliforme 的生长抑制作用。其中，Achromobacter 菌属和枯草芽孢杆菌（BS21）的生长抑制率分别为 73.54% 和 71.61%。调查显示，应用 Achromobacter spp.
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