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Genetic Variations of Candida glabrata Clinical Isolates from Korea using Multilocus Sequence Typing 韩国光念珠菌临床分离株的多位点序列分型分析
Pub Date : 2018-01-01 DOI: 10.4172/1989-8436.100086
M. Kang, Yoon-Sung Choi, Jiyoung Lee, K. Shin, Y. Uh, Young Kwon Kim, Hyunwoo Jin, Sunghyun Kim
Background: Although Candida albicans is considered to be the major fungal pathogen of candidemia, severe infections by non-albicans Candida (NAC) spp. have been on the increase in recent years. Among NAC spp., C. glabrata has emerged as the second most common pathogen. Unlike other Candida spp., it is often resistant to various azole antifungal agents, such as fluconazole. However, few studies have been conducted to investigate its structure, epidemiology, and basic biology. Recently, multi-locus sequence typing (MLST) has been developed as a highly useful and portable molecular biology technique. Methods: In the present study, MLST was performed with a total of 102 C. glabrata clinical isolates that were isolated from various types of clinical specimens. The present study was performed with a total of 102 C. glabrata clinical isolates that were isolated from various types of clinical specimens. The fungal internal transcribed spacer (ITS) gene wad amplified and sequenced to identify and confirm C. glabrata clinical isolates. For MLST, six housekeeping genes including 1,3-beta-glucan synthase (FKS), 3-isopropylmalate dehydrogenase (LEU2),myristoyl-CoA, protein Nmyristoyltransferase (NMT1), phosphoribosyl-anthranilate isomerase (TRP1), UTP-glucose-1-phosphate uridylyltransferase (UGP1), and orotidine-5'-phosphate decarboxylase (URA3) were amplified and sequenced. The results were analyzed by using the C. glabrata database. Results: Of a total of 3,345 base-pair DNA sequences, 49 (1.5%) variable nucleotide sites were found and the results showed that a total of 12 different sequence types (STs) were identified from the 102 clinical isolates. As classified by STs, The ST138 was the most predominant sequence type (ST) in this study as a result of 52.9% (54/102), and the following most predominant ST was the ST63 as a result of 23.5% (24/102). Conclusion: In conclusion, this data demonstrated that the ST138 was the most predominant ST in Korea. Further, we found eight undetermined STs (USTs) and then seven STs among these STs were given the number by PubMLST database. The data from this study might provide a fundamental database for further studies on C. glabrata, including its epidemiology, and evolution. Furthermore, the data might also contribute to the development of novel antifungal agents and diagnostic tests.
背景:虽然白色念珠菌被认为是念珠菌病的主要真菌病原体,但近年来非白色念珠菌(NAC)的严重感染呈上升趋势。在NAC中,光斑锥虫已成为第二大常见病原体。与其他念珠菌不同,它通常对各种唑类抗真菌剂(如氟康唑)具有耐药性。然而,对其结构、流行病学和基础生物学的研究很少。近年来,多位点序列分型(MLST)已成为一种非常有用的便携式分子生物学技术。方法:本研究对从不同类型临床标本中分离的共102株glabrata临床分离株进行MLST分析。本研究共从不同类型的临床标本中分离出102株光棘球蚴临床分离株。对真菌内部转录间隔段(ITS)基因进行扩增和测序,以鉴定和确认临床分离株。对于MLST,扩增并测序了6个内务基因,包括1,3- β -葡聚糖合成酶(FKS)、3-异丙基苹果酸脱氢酶(LEU2)、肉豆肉酰基辅酶a、蛋白肉豆肉酰基转移酶(NMT1)、磷酸核糖酰基-甲酰异构体酶(TRP1)、utp -葡萄糖-1-磷酸尿苷基转移酶(UGP1)和欧罗嘌呤-5′-磷酸脱羧酶(URA3)。利用C. glabrata数据库对结果进行分析。结果:在共3345个碱基对DNA序列中,发现49个(1.5%)可变核苷酸位点,结果表明102株临床分离株共鉴定出12种不同的序列类型(STs)。按序列类型分类,ST138是本研究中最主要的序列类型(ST),占52.9%(54/102),其次是ST63,占23.5%(24/102)。结论:该数据表明ST138是韩国最主要的ST。进一步,我们发现了8个未确定的STs (USTs),并通过PubMLST数据库给出了其中7个STs的编号。本研究的数据可为进一步研究青叶蝉的流行病学和进化提供基础数据。此外,这些数据也可能有助于开发新的抗真菌药物和诊断测试。
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引用次数: 1
Comparative Studies on the Bacteria associated with Hands of School Pupils’ in Government and Private Primary Schools in Dutsin-MA, Kastina State Kastina州dutin - ma公立和私立小学与学校之手相关细菌Pupils’的比较研究
Pub Date : 2018-01-01 DOI: 10.4172/1989-8436.100087
John Wisdom Maji, Musa Daniel Danladi, S. AghemwenhioItohan, Ra
The importance of regular hand washing cannot be overemphasized, as this study reviewed the need to constantly wash our hands as well as the benefits derived from the practice and also pointed out the consequences of not regularly observing this healthy practice. The following species were isolated from swabs from different primary school pupils from private and government owned primary schools, Salmonella spp., Staphylococcus spp., E. coli and Bacillus spp. Swabs from pupils showed the following result of cfu mean total viable count; 1.61 × 104, 1.52 × 102, 1.61 × 101 and 1.8 × 102. This result was obtained from pupils from the four schools; Sada primary school, Dammy preparatory School, Apollo nursery and primary school, Gummi primary school(Government school) respectively. Microbial population was more in the Government School than in the private schools. The isolated organisms were quite resistant to most of the antibiotics used, however, Staphyloccus sp. Was most sensitive to streptomycin, while Bacillus sp. was most sensitive to perfloxacin, E. coli and Salmonella sp. were very sensitive to ciprofloxacin. I therefore conclude that since the hand is a major reservoir of enteric diseases , there is need to create public awareness and build a global network on hand washing bearing the health implications of dirty and contaminated hands; therefore Proper hygiene and public enlightenment of the hands in disease dissemination should be advocated. Promotion of good hygiene by school teachers is very important, hence, key hygiene habits such as good hand washing practice that are likely to be taken further into adulthood can be adopted by encouraging millions of school children to engage in these good repetitive behaviors.
经常洗手的重要性怎么强调都不为过,因为这项研究回顾了经常洗手的必要性以及洗手带来的好处,并指出了不定期遵守这种健康做法的后果。从私立和官办小学的不同小学生拭子中分离出以下菌种:沙门氏菌、葡萄球菌、大肠杆菌和芽孢杆菌。小学生拭子cfu平均总活菌数结果如下:1.61 × 104、1.52 × 102、1.61 × 101和1.8 × 102。这一结果是从四所学校的学生中得出的;分别是Sada小学,Dammy预备学校,Apollo幼儿园和小学,Gummi小学(官立学校)。公立学校的微生物数量多于私立学校。其中,葡萄球菌对链霉素最敏感,芽孢杆菌对过氟沙星最敏感,大肠杆菌和沙门氏菌对环丙沙星最敏感。因此,我的结论是,由于手是肠道疾病的主要宿主,有必要提高公众意识,并建立一个关于洗手的全球网络,以了解脏手和被污染的手对健康的影响;因此,在疾病传播过程中应提倡正确的手部卫生和公众启蒙。学校教师促进良好的卫生习惯是非常重要的,因此,通过鼓励数百万学童从事这些良好的重复性行为,可能会在成年后进一步采用良好的卫生习惯,例如良好的洗手习惯。
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引用次数: 2
A Comprehensive Review of the Present and Future Antibiotic Susceptibility Testing (AST) Systems 当前和未来抗生素药敏试验(AST)系统的综合综述
Pub Date : 2018-01-01 DOI: 10.4172/1989-8436.100083
S. Puttaswamy, Sagar K. Gupta, Hariharan Regunath, L. Smith, Shramik Sengupta
Tools and instruments available in the clinical microbiology labs for analysis of patient samples and diagnosis are constantly evolving. The main impetus behind this is to decrease the overall time taken to obtain the results from the instruments, enhance the ease of sample processing, increasing the sample turn-around time with the ultimate goal of earlier patient treatment and better recovery rates. This is especially true in the case of antibiotic susceptibility testing (AST), where every hour saved in obtaining the results leading to an earlier switch to targeted antibiotic therapy will have a direct influence on improving clinical outcomes. Reduction in the time to obtain AST results reduces the duration of use of broad-spectrum antibiotics, which in turn decreases the emergence of antibiotic resistance among bacteria. Many of the traditional methods available for AST are labor intensive and slow despite being precise in obtaining results. Thus, there is a trend towards development and use of automated diagnostic devices which are rapid and easy to use. This review article provides a detailed summary of traditional AST methods, currently used automated methods, and focuses on some of the promising emerging and future technologies in the field of rapid antibiotic susceptibility profiling.
临床微生物实验室中用于分析患者样本和诊断的工具和仪器不断发展。这背后的主要推动力是减少从仪器获得结果所需的总时间,增强样品处理的便利性,增加样品周转时间,最终目标是早期患者治疗和更好的恢复率。在抗生素敏感性试验(AST)中尤其如此,在获得结果中节省的每一个小时都会导致更早地转向靶向抗生素治疗,这将对改善临床结果产生直接影响。获得AST结果的时间缩短缩短了使用广谱抗生素的时间,从而减少了细菌中抗生素耐药性的出现。许多用于AST的传统方法是劳动密集型的,尽管获得结果很精确,但速度很慢。因此,开发和使用快速且易于使用的自动诊断设备是一种趋势。本文对传统的AST方法和目前使用的自动化方法进行了详细的总结,并重点介绍了一些有前途的新兴技术和未来的快速抗生素药敏分析技术。
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引用次数: 42
Asymptomatic Fasciola hepatica Infection presenting with Hypereosinophilia 无症状肝片形吸虫感染,表现为嗜酸性细胞增多
Pub Date : 2018-01-01 DOI: 10.4172/1989-8436.100073
C. Medicina, G. Mabel, M. Greta, C. William, C. Maritza, R. Richar, S. Hiromu
Background: Fascioliasis is a worldwide zoonosis caused by trematodes F. hepatica and F. gigantica. The clinical signs, symptoms and laboratory tests are related to acute, latent or chronic phase of infection. Usually it is characterized by fever, abdominal pain, hepatosplenomegaly, high leukocyte count, vague gastrointestinal disturbances, biliary obstruction with intermittent jaundice, and eosinophilia. Methods and findings: A 7-year-old girl from a rural Andean area of Ecuador presented with a persistent hypereosinophilia. Leukocyte count was 35,200 mm3, with 60% eosinophilia. Anamnesis and physical examination did not reveal any signs or symptoms of infection. Ova, characteristic of Fasciola spp. were observed in the patient’s stool by direct microscopic examination and confirmed to be F. hepatica by the sequence analysis of the PCR amplicons of the second internal transcribed spacer (ITS2) gene. Abdominal ultrasonography showed a liver of normal shape, size and location with no dilation of the intra or extra-hepatic biliary tract. The patient was successfully treated with triclabendazole, 10 mg/kg for two consecutive days. Conclusions: Clinicians and lab technicians working in endemic and non-endemic areas for fascioliasis should consider the possibility of this parasitic infection in clinically asymptomatic patients with persistent eosinophilia in order to avoid erroneous diagnosis and therapeutic interventions.
背景:片形吸虫病是一种由肝吸虫和巨吸虫引起的世界性人畜共患病。临床体征、症状和实验室检查与感染的急性期、潜伏期或慢性期有关。通常表现为发热、腹痛、肝脾肿大、白细胞计数高、胃肠功能不清、胆道梗阻伴间歇性黄疸和嗜酸性粒细胞增多。方法和结果:一名来自厄瓜多尔安第斯地区农村的7岁女孩出现了持续性嗜酸性粒细胞增多症。白细胞计数35200 mm3, 60%嗜酸性粒细胞增多。记忆和体格检查未发现任何感染的体征或症状。直接显微镜检查患者粪便中观察到具有片形吸虫特征的卵细胞,经第二内转录间隔基因(ITS2) PCR扩增子序列分析证实为肝吸虫。腹部超声检查显示肝脏形状、大小和位置正常,肝内或肝外胆道未扩张。三氯咪唑10 mg/kg连续2天治疗成功。结论:在片形吸虫病流行区和非流行区工作的临床医生和实验室技术人员应考虑临床上无症状的持续性嗜酸性粒细胞增多患者发生这种寄生虫感染的可能性,以避免误诊和治疗干预。
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引用次数: 5
Biological Characters of Vancomycin ResistantStaphylococcus aureus Isolates from aUniversity Hospital in Egypt 埃及某大学医院耐万古霉素金黄色葡萄球菌的生物学特性
Pub Date : 2018-01-01 DOI: 10.4172/1989-8436.100072
S. FatmaIbrahim, T. El-SaidEl-Banna, Abdullahi Aa, E. El-Ekhnawy
Background: Vancomycin resistance in Staphylococcus aureus in many cases appears to be associated with some biological changes. Methods and Findings: In this study 88 vancomycin resistant Staphylococcus aureus (VRSA) were isolated from Tanta. Antibiotic susceptibility test was performed. Some of its biological characters were studied including autolytic activity, coagulase production, surface hydrophobicity and biofilm formation. Conclusion: As observed, vancomycin MICs of the selected VRSA isolates were directly proportional to their hydrophobicity index and biofilm production. On the other hand, MICs were inversely proportional to coagulase activity (the higher the dye diffusion, the lower the coagulase activity).
背景:在许多情况下,金黄色葡萄球菌的万古霉素耐药似乎与一些生物学变化有关。方法与发现:本研究从坦他菌中分离到88株耐万古霉素金黄色葡萄球菌(VRSA)。进行抗生素药敏试验。研究了它的一些生物学特性,包括自溶活性、凝固酶的产生、表面疏水性和生物膜的形成。结论:所选VRSA分离株的万古霉素mic与其疏水指数和生物膜产量成正比。另一方面,mic与凝固酶活性成反比(染料扩散越高,凝固酶活性越低)。
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引用次数: 4
Prevalence and Antibiotic SensitivityPattern of Staphylococcus aureusIsolates of Non-Hospital Origin 非医院来源金黄色葡萄球菌分离株的流行和抗生素敏感性模式
Pub Date : 2018-01-01 DOI: 10.4172/1989-8436.100076
Okonkwo Ec, Orji Jo, Aondoackaa Ad, Ugbo En, Moses Ib, Ogene L, Nwuna En
Title: Antibiogram of Staphylococcus aureus isolates bacteriologically recovered from urine samples of pupils. Background: The emergence and spread of strains of S. aureus that are resistant to some first line antibiotics is of public health importance. Staphylococcus aureus is ubiquitously found in the environment as a commensal organism, but pathogenic strains of the bacterium that are resistant to some commonly available antibiotics puts antimicrobial therapy at risk. This study reports the prevalence and sensitivity of S. aureus from primary school pupils. Methods and findings: A total of 25 urine samples were collected and bacteriologically analyzed for the isolation of S. aureus isolates. The antibiogram of the S. aureus isolates was carried out using the Kirby-Bauer disk diffusion method as per the CLSI guideline. Statistical analysis was carried out using SPSS. Out of 25 urine samples screened for the isolation of S. aureus, 22 (88%) of them were confirmed positive. S. aureus was found to be higher in females 12 (93.3%) compared to males (n=10; 83.3%). In females, the occurrence of S. aureus isolates was highest among pupils aged ≤ 7 years (n=6; 100%), and this was followed by pupils aged 8-10 years (n=4; 80%). S. aureus isolates was least recovered from urine samples of pupils aged ≥ 12 years (n=2; 100%). There was no statistical difference in the rate of isolation of S. aureus isolates in relation to the age and sex of the pupils recruited for this study. The S. aureus isolates were resistant or intermediately resistant to ampicillin (77.2%), chloramphenicol (72.2%), ampicillin (77.2%) and levofloxacin (59.0%). But they were considerably sensitive to gentamicin (77.2%) and ciprofloxacin (72.7%). Conclusions: Our study has shown that S. aureus isolates from apparently healthy pupils are drug resistant in nature. We recommend a periodic screening of environmental isolates of S. aureus in order to contain any disease outbreak due to drug resistant S. aureus isolates.
题目:从小学生尿样中分离出金黄色葡萄球菌的抗生素谱。背景:对一些一线抗生素具有耐药性的金黄色葡萄球菌菌株的出现和传播具有重要的公共卫生意义。金黄色葡萄球菌作为一种共生生物在环境中无处不在,但这种细菌的致病性菌株对一些常用的抗生素具有耐药性,这使得抗菌治疗面临风险。本研究报告了小学生金黄色葡萄球菌的患病率和敏感性。方法与发现:收集25份尿样,进行细菌学分析,分离金黄色葡萄球菌。根据CLSI指南,采用Kirby-Bauer纸片扩散法对金黄色葡萄球菌分离株进行抗生素谱分析。采用SPSS进行统计分析。在筛选分离金黄色葡萄球菌的25份尿液样本中,22份(88%)被确认为阳性。金黄色葡萄球菌在女性中的感染率(93.3%)高于男性(n=10;83.3%)。在女性中,金黄色葡萄球菌分离株在≤7岁的小学生中发生率最高(n=6;100%),其次是8-10岁的学生(n=4;80%)。≥12岁学生尿液样本中检出的金黄色葡萄球菌最少(n=2;100%)。在金黄色葡萄球菌分离率方面,与本研究招募的学生的年龄和性别没有统计学差异。金黄色葡萄球菌对氨苄西林(77.2%)、氯霉素(72.2%)、氨苄西林(77.2%)和左氧氟沙星(59.0%)耐药或中耐药;但对庆大霉素(77.2%)和环丙沙星(72.7%)相当敏感。结论:我们的研究表明,金黄色葡萄球菌分离自表面健康的瞳孔本质上是耐药的。我们建议对金黄色葡萄球菌的环境分离株进行定期筛查,以控制因耐药金黄色葡萄球菌分离株引起的任何疾病暴发。
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引用次数: 0
Intestinal Parasites, Malaria and Anemiaamong School Children in Some FloodAffected Areas of Ogbaru Local GovernmentAnambra State, Nigeria 尼日利亚阿南布拉州奥格巴鲁地方政府部分洪灾灾区学童肠道寄生虫、疟疾和贫血
Pub Date : 2018-01-01 DOI: 10.4172/1989-8436.100080
M. OgalueUchenna, M. EkejinduIfeoma, Ochiabuto Omtb, Obi Mc, Obeagu EmmanuelI, S. EkelozieIfeoma
An epidemiological study was carried out on school children in some flood affected areas of Ogbaru local government Anambra state Nigeria to assess their health and environment after the 2011/2012 flood. Four hundred and eighty primary school children were examined for intestinal parasite, malaria parasite and anaemia. Formol acetate concentration method was used to analyse the stool samples for intestinal parasites. Giemsia’s staining technique was used for malaria parasite test, while Haematocrit packed cell volume capillary method and cyanmethaemoglobin method were used to screen for anaemia. Fifty two point five (52.5%) percent were infected with one or more of the intestinal parasites. Eighty six point four six percent (86.46%) were infected with malaria parasite, while 55.21% were anaemic (hemoglobin <11 g/dl). Ascaris lumbricoides was the highest (29.20%) intestinal parasites obtained while Hymenolepis nana was least (2.35%). The highest rate of intestinal parasite infection was seen in the age group10-13 years (52.54%) and the least was from 14-17 years (49.02%). Intestinal parasites were more in females (51.29%) than in males (48.08%). The highest rate of infection with malaria parasite was seen among the ages of 6-9years (89.83%) while 10-13 years and 14-17 years had a prevalence of 85.17% and 85.62% respectively. Malaria infection was more prevalent in males (45.83%) than females (40.63%). The highest prevalence of anaemia was seen between the ages of 10- 13 (57.77%) and the least 14-17 (52.29%). Forty seven point five percent of the children had both malaria parasite and anaemia. There was significant association between PCV of malaria infected children and non infected children (p<0.05). These findings suggest that this area has some major public health challenges therefore the need for adequate measures to remedy the situation and avoid epidemics.
在尼日利亚阿南布拉州Ogbaru地方政府的一些受洪水影响地区对学龄儿童进行了流行病学研究,以评估2011/2012年洪水后他们的健康和环境。对480名小学生进行了肠道寄生虫、疟疾寄生虫和贫血检查。采用醋酸福尔摩浓度法对粪便标本进行肠道寄生虫分析。疟疾寄生虫检测采用吉姆氏染色法,贫血筛查采用红细胞堆积细胞体积毛细管法和氰化血红蛋白法。52.5%(52.5%)的人感染了一种或多种肠道寄生虫。86.46%感染疟疾,55.21%感染贫血(血红蛋白<11 g/dl)。检出的肠道寄生虫中,蚓状蛔虫最多(29.20%),微小膜膜绦虫最少(2.35%)。肠道寄生虫感染率以10 ~ 13岁最高(52.54%),14 ~ 17岁最低(49.02%)。女性肠道寄生虫感染率(51.29%)高于男性(48.08%)。其中,6 ~ 9岁感染率最高(89.83%),10 ~ 13岁和14 ~ 17岁感染率分别为85.17%和85.62%。男性疟疾感染率(45.83%)高于女性(40.63%)。10 ~ 13岁贫血发生率最高(57.77%),14 ~ 17岁最低(52.29%)。47.5%的儿童同时患有疟疾寄生虫和贫血。疟疾感染儿童PCV与未感染儿童PCV有显著相关性(p<0.05)。这些调查结果表明,该地区存在一些重大的公共卫生挑战,因此需要采取适当措施来纠正这种情况并避免流行病。
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引用次数: 1
Susceptibility of Neisseria gonorrhoeae to Quinolones and Azithromycin: ItsImplication in the Treatment of Pharyngeal Infection 淋病奈瑟菌对喹诺酮类药物和阿奇霉素的敏感性:在咽部感染治疗中的应用
Pub Date : 2018-01-01 DOI: 10.4172/1989-8436.100084
A. Aguirre-Quiñonero, Rodríguez-Achaer, A. Io, F. Calvo-Muro, A. Canut-Blasco
Neisseria gonorrhoeae infections are the second most common bacterial sexually transmitted infections (STI) in our area [1-3]. Resistance to this microorganism is currently considered a global threat by the World Health Organization (WHO). Current Spanish guidelines recommend a dual therapy with extended-spectrum cephalosporines (such as cefotaxime, ceftriaxone, cefuroxime or cefixime) and azithromycin (AZT) [4]. Dual therapy has shown synergy in-vitro and in-vivo and is effective against Chlamydia trachomatis. In pharyngeal infections cephalosporins have shown to be less effective than quinolones; thus, UK guideline recommend ciprofloxacin (CIP) in pharyngeal infection if the isolate is known to be quinolone susceptible. On the other hand, European and German guidelines recommend quinolones as an alternative treatment in pharyngeal infections if the isolated strain is susceptible to these compounds and there are indications against using ceftriaxone [5].
淋病奈瑟菌感染是我国地区第二常见的细菌性传播感染(STI)[1-3]。对这种微生物的耐药性目前被世界卫生组织(世卫组织)认为是一种全球性威胁。目前的西班牙指南推荐使用广谱头孢菌素(如头孢噻肟、头孢曲松、头孢呋辛或头孢克肟)和阿奇霉素(AZT)进行双重治疗[4]。双重治疗已显示出体外和体内协同作用,对沙眼衣原体有效。在咽部感染中,头孢菌素已显示不如喹诺酮类药物有效;因此,英国指南推荐环丙沙星(CIP)咽部感染,如果分离物是已知喹诺酮敏感。另一方面,欧洲和德国的指南建议,如果分离的菌株对这些化合物敏感,并且有不使用头孢曲松的适应症,则将喹诺酮类药物作为咽感染的替代治疗方法[5]。
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引用次数: 0
Detection of Quinolones Resistance in Ureaplasma urealyticum Clinical Isolates 解脲原体临床分离株喹诺酮类药物耐药性检测
Pub Date : 2018-01-01 DOI: 10.4172/1989-8436.100082
R. Rashid, A. Safari
Background: Widespread use of quinolones are increasing resistance to these antibiotic in Ureaplasma urealyticum. Quinolone resistance occur in U. urealyticum due to Point mutations in DNA topoisomerase and DNA gyrase genes (gyrA, gyrB, parC and parE). The aim of this study were determination of point mutation in clinical isolate by PCR and sequencing methods. Materials and Methods: To investigate the prevalence of quinolone resistance mutations, 30 U. urealyticum positive sample were gathered from pregnant women, referred to obstetrics and gynecology section or prenatal clinic in Beasat Hospital, Sanandaj, Iran. DNA extraction were performed. Point mutation of target genes were done after PCR amplification reaction by sequencing. Results: The results of gene sequencing showed that the substitution of amino acids in codon 83 parC happened in 5 samples. Aspartic acid 82 Asparagine change caused by amino acid substitution D to N happened in 4 cases. The results of the gyrA gene sequencing showed that the amino acid substitution in codon 104 occurred in 2 sample. GUL104LYS amino acid substitution change occurred in 5 samples. Conclusion: Quinolones are most common antibiotics effective in treatment infections caused by a U. urealyticum. Therefore early detection of resistance genes is essential to correct treatment regime to prevent the spread of resistant strains.
背景:喹诺酮类药物的广泛使用增加了解脲原体对这些抗生素的耐药性。由于DNA拓扑异构酶和DNA回转酶基因(gyrA、gyrB、parC和parE)的点突变,解脲脲菌对喹诺酮类药物产生耐药性。本研究的目的是用PCR和测序方法检测临床分离株的点突变。材料与方法:为调查喹诺酮类药物耐药突变的流行情况,在伊朗Sanandaj Beasat医院妇产科或产前门诊收集30例孕妇解脲菌阳性样本。进行DNA提取。目的基因经PCR扩增反应测序后进行点突变。结果:基因测序结果显示,5份样本中密码子83parc的氨基酸发生了替换。天冬氨酸82 4例发生氨基酸D向N取代引起的天冬氨酸变化。gyrA基因测序结果显示,2份样品的密码子104发生了氨基酸替换。5个样品发生了GUL104LYS氨基酸取代变化。结论:喹诺酮类抗生素是治疗解脲酵母菌感染最常用的有效抗生素。因此,早期发现耐药基因对于纠正治疗方案以防止耐药菌株的传播至关重要。
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引用次数: 0
Evaluation for the Novel mecC MethicillinResistance among Methicillin ResistantStaphylococcal Isolates in two EgyptianUniversity Hospitals 埃及两所大学医院耐甲氧西林葡萄球菌新型耐甲氧西林葡萄球菌的评价
Pub Date : 2018-01-01 DOI: 10.4172/1989-8436.100071
Rania Aa, Nsreen Mk, R. Hel, Mona Ma
Methicillin resistance adds to the threat of staphylococcal infections in humans. The gene for methicillin resistance in staphylococci is not only mecA gene as it was thought. The recently discovered mecC gene in animal and human isolates also encodes for methicillin resistance. The prevalence of the novel gene may be underestimated. It is discovered so far in Europe with low prevalence. This study evaluates the existence of mecC gene in two Egyptian university hospitals. A total of 600 methicillin resistant (520 MRSA and 80 MRCoNS) isolates from two university hospitals were screened for discrepancy in susceptibility between cefoxitin (30 μg) and oxacillin (1 μg) by disc diffusion as a method that could be used to predict the potential existence of mecC gene whose protein product has noticeably higher affinity for oxacillin. Discordant isolates included in selected 150 samples (110 MRSA and 40 MR-CoNS) were tested by PBP2a latex agglutination test, and or conventional PCR for mecA gene. Samples negative for mecA gene were tested for oxacillin and cefoxitin MIC by Vitec II and for mecC gene by PCR. All discrepant isolates were positive for PBP2a latex agglutination and mecA PCR, while the 6 isolates (5.5%) negative for mecA by PCR were resistant to both cefoxitin and oxacillin by disc diffusion and by Vitec II. In addition, those 6 isolates negative for mecA were also negative for mecC gene. Thus mecC gene for methicillin resistance couldn’t be detected in this study, though this may be baseline for further prevalence studies.
甲氧西林耐药性增加了人类葡萄球菌感染的威胁。葡萄球菌耐甲氧西林基因并不像以前认为的那样仅仅是mecA基因。最近在动物和人类分离株中发现的mecC基因也编码甲氧西林耐药性。这种新基因的流行程度可能被低估了。到目前为止,在欧洲发现的发病率很低。本研究评估了埃及两所大学医院中mecC基因的存在。对两所大学医院的600株耐甲氧西林菌株(520株MRSA和80株MRCoNS)进行盘片扩散筛选,检测头孢西丁(30 μg)和奥西林(1 μg)的敏感性差异,预测其蛋白产物对奥西林具有明显较高亲和力的mecC基因是否存在。采用PBP2a胶乳凝集试验和常规PCR对150个样本(110株MRSA和40株MR-CoNS)中不一致的分离株进行mecA基因检测。对mecA基因阴性的样品,分别用Vitecⅱ检测oxacillin和头孢西丁MIC, PCR检测mecC基因。PBP2a胶乳凝集和mecA PCR检测均为阳性,mecA PCR检测为阴性的6株(5.5%)对头孢西丁和邻苯西林均耐药。此外,mecA阴性的6株菌株mecC基因也呈阴性。因此,本研究未检测到甲氧西林耐药的mecC基因,但这可能是进一步流行病学研究的基础。
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引用次数: 5
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Archives of Clinical Microbiology
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