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Development of recombinant proteins for vaccine candidates against serotypes O and A of Foot-and-Mouth Disease virus in Bangladesh. 在孟加拉国开发针对口蹄疫病毒血清型 O 和 A 的候选疫苗重组蛋白。
Access microbiology Pub Date : 2024-06-24 eCollection Date: 2024-01-01 DOI: 10.1099/acmi.0.000713.v4
Salma Akter, M Shaminur Rahman, M Rafiul Islam, Masuda Akther, Humaira Anjume, Mafruha Marjia, Md Mizanur Rahaman, M Anwar Hossain, Munawar Sultana
{"title":"Development of recombinant proteins for vaccine candidates against serotypes O and A of Foot-and-Mouth Disease virus in Bangladesh.","authors":"Salma Akter, M Shaminur Rahman, M Rafiul Islam, Masuda Akther, Humaira Anjume, Mafruha Marjia, Md Mizanur Rahaman, M Anwar Hossain, Munawar Sultana","doi":"10.1099/acmi.0.000713.v4","DOIUrl":"10.1099/acmi.0.000713.v4","url":null,"abstract":"<p><p>Frequent vaccine failure leading to recurrent outbreaks of Foot-and-Mouth Disease (FMD) in livestock populations necessitates the development of a customizable vaccine platform comprising potential antigenic determinants of circulating lineages of FMD viruses. Artificially designed, chimaeric protein-based recombinant vaccines are novel approaches to combat the phylogenetically diverse FMD Virus (FMDV) strains. Among seven recognized serotypes, only serotypes O and A are dominantly circulating in Bangladesh and neighbouring countries of Asia, where transboundary transmission, recurrent outbreaks and emergence of novel lineages of FMDV are highly prevalent. The objective of this study was to develop multi-epitope recombinant proteins, procuring immunogenicity against circulating diverse genotypes of FMDV serotypes O and A. Two chimaeric proteins, named B1 (41.0 kDa) and B3 (39.3 kDa), have been designed to incorporate potential B-cell and T-cell epitopes selected from multiple FMDV strains, including previously reported and newly emerged sub-lineages. After expression, characterization and immunization of guinea pigs with a considerable antigen load of B1 and B3 followed by serological assays revealed the significant protective immunogenicity, developed from the higher (100 µg) doses of both antigens, against most of the currently prevalent serotype O and A strains of FMDV. The efficient expression, antigenic stability, and multivalent immunogenic potency of the chimaeric proteins strongly indicate their credibility as novel vaccine candidates for existing serotypes O and A of FMDV in Bangladesh and surrounding territories.</p>","PeriodicalId":94366,"journal":{"name":"Access microbiology","volume":"6 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11261717/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141753787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Group A streptococcus isolated in Guyana with reduced susceptibility to β-lactam antibiotics. 在圭亚那分离到的对β-内酰胺类抗生素敏感性降低的 A 组链球菌。
Access microbiology Pub Date : 2024-06-20 eCollection Date: 2024-01-01 DOI: 10.1099/acmi.0.000746.v3
Melissa Kalladeen, Paul Cheddie, Patrick Eberechi Akpaka
{"title":"Group A streptococcus isolated in Guyana with reduced susceptibility to β-lactam antibiotics.","authors":"Melissa Kalladeen, Paul Cheddie, Patrick Eberechi Akpaka","doi":"10.1099/acmi.0.000746.v3","DOIUrl":"10.1099/acmi.0.000746.v3","url":null,"abstract":"<p><p><b>Introduction.</b> <i>Streptococcus pyogenes</i> [group A streptococci (GAS)] is the causative agent of pharyngitis and various other syndromes involving cellulitis, streptococcal toxic shock syndrome (STSS), and necrotising fasciitis. Although the prevalence of GAS infections globally remains high, necessitating the widespread use of β-lactam antibiotics, GAS have remained largely susceptible to these agents. However, there have been several reports of GAS with reduced susceptibility harbouring mutations in genes for penicillin-binding proteins (PBPs). The objectives of this study were to examine the <i>in vitro</i> β-lactam susceptibility patterns of group A streptococci, determine the prevalence of drug resistance, and ascertain whether such resistance could be attributed to mutations in specific PBP genes. <b>Methods.</b> In this study, we sought to use Sanger sequencing to identify mutations in PBP genes of <i>Streptococcus pyogenes</i> isolated from patients that required inpatient and outpatient care that could confer reduced PBP affinity for penicillin and/or cephalosporin antibiotics. All isolates were screened for susceptibility to penicillin, amoxicillin, and cefazolin using E-test strips. <b>Results.</b> While there were no documented cases of reduced susceptibility to penicillin or amoxicillin, 13 isolates had reduced susceptibility to cefazolin. Examination of <i>pbp1a</i> by Sanger sequencing revealed several isolates with single amino acid substitutions, which could potentially reduce the affinity of PBP 1A for cefazolin and possibly other first-generation cephalosporins. <b>Conclusion.</b> Penicillin and penicillin-derived antibiotics remain effective treatment options for GAS infections, but active surveillance is needed to monitor for changes to susceptibility patterns against these and other antibiotics and understand the genetic mechanisms contributing to them.</p>","PeriodicalId":94366,"journal":{"name":"Access microbiology","volume":"6 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11261736/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141753788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A clinical metagenomic study of biopsies from Mexican endophthalmitis patients reveals the presence of complex bacterial communities and a diversity of resistance genes. 对墨西哥眼内炎患者活检组织进行的临床元基因组研究显示,存在复杂的细菌群落和多种抗性基因。
Access microbiology Pub Date : 2024-06-20 eCollection Date: 2024-01-01 DOI: 10.1099/acmi.0.000639.v3
Miguel Ángel Vences-Guzmán, Martín Jiménez-Rodríguez, Luis Lozano, Sergio Rojas-Juárez, Juan Abel Ramírez-Estudillo, Ángeles Yahel Hernández-Vázquez, Ingrid Yazmín Pita-Ortiz, Karol Guadalupe Ramírez-Ceballos, Silvia Medina-Medina, Christian Sohlenkamp
{"title":"A clinical metagenomic study of biopsies from Mexican endophthalmitis patients reveals the presence of complex bacterial communities and a diversity of resistance genes.","authors":"Miguel Ángel Vences-Guzmán, Martín Jiménez-Rodríguez, Luis Lozano, Sergio Rojas-Juárez, Juan Abel Ramírez-Estudillo, Ángeles Yahel Hernández-Vázquez, Ingrid Yazmín Pita-Ortiz, Karol Guadalupe Ramírez-Ceballos, Silvia Medina-Medina, Christian Sohlenkamp","doi":"10.1099/acmi.0.000639.v3","DOIUrl":"10.1099/acmi.0.000639.v3","url":null,"abstract":"<p><p>Infectious endophthalmitis is a severe ophthalmic emergency. This infection can be caused by bacteria and fungi. For efficient treatment, the administration of antimicrobial drugs to which the microbes are susceptible is essential. The aim of this study was to identify micro-organisms in biopsies of Mexican endophthalmitis patients using metagenomic next-generation sequencing and determine which antibiotic resistance genes were present in the biopsy samples. In this prospective case study, 19 endophthalmitis patients were recruited. Samples of vitreous or aqueous humour were extracted for DNA extraction for metagenomic next-generation sequencing. Analysis of the sequencing results revealed the presence of a wide variety of bacteria in the biopsies. Resistome analysis showed that homologues of antibiotic resistance genes were present in several biopsy samples. Genes possibly conferring resistance to ceftazidime and vancomycin were detected in addition to various genes encoding efflux pumps. Our findings contrast with the widespread opinion that only one or a few bacterial strains are present in the infected tissues of endophthalmitis patients. These diverse communities might host many of the resistance genes that were detected, which can further complicate the infections.</p>","PeriodicalId":94366,"journal":{"name":"Access microbiology","volume":"6 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11261729/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141753784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phenotypic antibiotic susceptibility profile of clinical Enterobacteriaceae isolates from Kaduna State, northwest Nigeria. 尼日利亚西北部卡杜纳州临床肠杆菌科细菌分离物的表型抗生素敏感性概况。
Access microbiology Pub Date : 2024-06-20 eCollection Date: 2024-01-01 DOI: 10.1099/acmi.0.000747.v5
Peace Amarachukwu Ezeh, Busayo Olalekan Olayinka, Rebecca Olajumoke Bolaji, Suleiman Ahmed Babangida, Ahmed Olowo-Okere
{"title":"Phenotypic antibiotic susceptibility profile of clinical Enterobacteriaceae isolates from Kaduna State, northwest Nigeria.","authors":"Peace Amarachukwu Ezeh, Busayo Olalekan Olayinka, Rebecca Olajumoke Bolaji, Suleiman Ahmed Babangida, Ahmed Olowo-Okere","doi":"10.1099/acmi.0.000747.v5","DOIUrl":"10.1099/acmi.0.000747.v5","url":null,"abstract":"<p><p><b>Background.</b> The increasing resistance of clinical <i>Enterobacteriaceae</i> isolates to commonly prescribed antibiotics has been reported around the world. Data are generally lacking on the prevalence and antibiotic susceptibility profile of clinical <i>Enterobacteriaceae</i> isolates from Kaduna, northwest Nigeria. This study thus aimed to determine the diversity and antibiotic resistance profile of clinical <i>Enterobacteriaceae</i> isolates recovered from clinical specimens from patients admitted to two selected healthcare institutions in Kaduna. <b>Methods.</b> This was a prospective cross-sectional study conducted between September and December 2021. Non-duplicate clinical bacterial isolates recovered from various specimens were collected and identified using rapid biochemical identification kits. The susceptibility of identified <i>Enterobacteriaceae</i> to various antibiotics and phenotypic detection of carbapenemase enzymes were thereafter determined. The data were analysed and visualized using R software version 4.3.1. <b>Results.</b> Of the 500 bacterial isolates recovered from specimens collected for the purpose of clinical bacteriology diagnostics, 108 (21.6 %) were identified as <i>Enterobacteriaceae</i>, with <i>Pantoea agglomerans</i> (52, 48.1 %) and <i>Klebsiella oxytoca</i> (19, 17.6 %) being the most prevalent. The isolates exhibited high resistance to azithromycin (69 %) and ceftazidime (42 %), while exhibiting low resistance to amikacin (7 %) and imipenem (10 %). Among the carbapenem-resistant <i>Enterobacteriaceae</i> (CRE) isolates, a significant proportion (12/17, 70.6 %) tested positive for carbapenemase activity. <b>Conclusion.</b> This study reports a high prevalence of multidrug-resistant <i>Enterobacteriaceae</i> in Kaduna, northwest Nigeria. The emergence of pathogenic <i>P. agglomerans</i> and an alarmingly high prevalence of carbapenemase-producing CRE were also observed. The presence of carbapenemase producers in an area with low carbapenem usage and resistance rates raises significant concerns. Continuous surveillance and robust antibiotic stewardship policies are imperative to preserve the efficacy of carbapenems in this region.</p>","PeriodicalId":94366,"journal":{"name":"Access microbiology","volume":"6 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11261666/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141753791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unearthing new learning opportunities: adapting and innovating through the 'Antibiotics under our feet' citizen science project in Scotland during COVID-19. 发掘新的学习机会:通过 COVID-19 期间在苏格兰开展的 "我们脚下的抗生素 "公民科学项目进行调整和创新。
Access microbiology Pub Date : 2024-06-19 eCollection Date: 2024-01-01 DOI: 10.1099/acmi.0.000710.v3
Rebecca Mary Cornwell, Kirsty Ross, Caius Gibeily, Isobel Guthrie, Pak Hei Li, Laurence Taylor Seeley, Yaxuan Kong, Ava True, Arun Barnes, Emma Nimmo, Gloriya Len, Ioana Oprea, Boyang Lin, Aswin Sasi, Vicky Chu, Chloe Davidson, Daniil Ulasavets, Grace Renouf-Bilanski, Maria Dmitrieva, Yana Leung, Ziying Ye, Sasha Brown, Meghna Vaidya, Jenna Hynes, Catherine Mullner, Priyansha Agarwal, Paul Johnston, Charlotte Thorley, Clarissa Melo Czekster
{"title":"Unearthing new learning opportunities: adapting and innovating through the 'Antibiotics under our feet' citizen science project in Scotland during COVID-19.","authors":"Rebecca Mary Cornwell, Kirsty Ross, Caius Gibeily, Isobel Guthrie, Pak Hei Li, Laurence Taylor Seeley, Yaxuan Kong, Ava True, Arun Barnes, Emma Nimmo, Gloriya Len, Ioana Oprea, Boyang Lin, Aswin Sasi, Vicky Chu, Chloe Davidson, Daniil Ulasavets, Grace Renouf-Bilanski, Maria Dmitrieva, Yana Leung, Ziying Ye, Sasha Brown, Meghna Vaidya, Jenna Hynes, Catherine Mullner, Priyansha Agarwal, Paul Johnston, Charlotte Thorley, Clarissa Melo Czekster","doi":"10.1099/acmi.0.000710.v3","DOIUrl":"10.1099/acmi.0.000710.v3","url":null,"abstract":"<p><p>'Antibiotics under our feet' is a Scottish citizen science project that aimed to raise science capital in primary school learners and their teachers through measurement of microbial diversity in urban soil samples in the search for novel antimicrobial compounds. Resistance to antibiotics is rising, posing a global threat to human health. Furthermore, science, technology, engineering and mathematics (STEM) skills are in crisis, jeopardising our capacity to mobilise as a society to fight antimicrobial resistance (AMR). Originally conceived as a response to the AMR and STEM emergencies, our project was hit by the unprecedented challenge of engaging with schools during the COVID-19 pandemic. We describe how we adapted our project to enable remote participation from primary schools and youth groups, utilising COVID-19 response initiatives as opportunities for multi-level co-creation of resources with learners in primary, secondary, and higher education. We produced portable kit boxes for soil sample collection with learning activities and videos linked to the Scottish Curriculum for Excellence. We also addressed glaring project specific content gaps relating to microbiology on English and Simple English Wikipedia. Our hybrid model of working extended our geographical reach and broadened inclusion. We present here the inception, implementation, digital resource outputs, and discussion of pedagogical aspects of 'Antibiotics under our feet'. Our strategies and insights are applicable post-pandemic for educators to develop STEM skills using soil, microbes, and antibiotics as a theme.</p>","PeriodicalId":94366,"journal":{"name":"Access microbiology","volume":"6 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11261732/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141753796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reply to letter: Erosive balanitis caused by Staphylococcus haemolyticus in a healthy, circumcised adult male 回信一名健康、包皮环切的成年男性因溶血性葡萄球菌引起的侵蚀性包皮龟头炎
Access microbiology Pub Date : 2024-06-04 DOI: 10.1099/acmi.0.000831
José Mazuecos-Blanca, José Rafael Mazuecos-Gutiérrez, Ana Jiménez-Gil
{"title":"Reply to letter: Erosive balanitis caused by Staphylococcus haemolyticus in a healthy, circumcised adult male","authors":"José Mazuecos-Blanca, José Rafael Mazuecos-Gutiérrez, Ana Jiménez-Gil","doi":"10.1099/acmi.0.000831","DOIUrl":"https://doi.org/10.1099/acmi.0.000831","url":null,"abstract":"","PeriodicalId":94366,"journal":{"name":"Access microbiology","volume":"9 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141266925","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
Erysipelothrix spp. and other Erysipelotrichales detected by 16S rRNA microbial community profiling in samples from healthy conventionally reared chickens and their environment 通过 16S rRNA 微生物群落分析检测健康常规饲养鸡及其环境样本中的 Erysipelothrix spp.
Access microbiology Pub Date : 2024-06-01 DOI: 10.1099/acmi.0.000736.v3
E. Wattrang, Tina Sørensen Dalgaard, Helena Eriksson, R. Söderlund
{"title":"Erysipelothrix spp. and other Erysipelotrichales detected by 16S rRNA microbial community profiling in samples from healthy conventionally reared chickens and their environment","authors":"E. Wattrang, Tina Sørensen Dalgaard, Helena Eriksson, R. Söderlund","doi":"10.1099/acmi.0.000736.v3","DOIUrl":"https://doi.org/10.1099/acmi.0.000736.v3","url":null,"abstract":"Outbreaks of erysipelas, a disease caused by infection with Erysipelothrix rhusiopathiae (ER), is a re-emerging problem in cage-free laying hen flocks. The source of ER infection in hens is usually unknown and serological evidence has also indicated the presence of ER or other antigenically related bacteria in healthy flocks. The aim of the present study was to evaluate sample collection, culture methods and DNA-based methodology to detect ER and other Erysipelotrichales in samples from healthy chickens and their environment. We used samples from a research facility with conventionally reared chickens with no history of erysipelas outbreaks where hens with high titres of IgY recognising ER previously have been observed. Microbial DNA was extracted from samples either directly or after pre-culture in nonselective or ER-selective medium. Real-time PCR was used for detection of Erysipelothrix spp. and high-throughput amplicon sequencing of 16S rRNA sequencing was used for detection of Erysipelotrichales. A pilot serological analysis of some Erysipelotrichales members with IgY from unvaccinated and ER-vaccinated high-biosecurity chickens, as well as conventionally reared chickens, was also performed. All samples were negative for ER, E. tonsillarum and E. piscisicarius by PCR analysis. However, 16S rRNA community profiling indicated the presence of several Erysipelotrichales genera in both environmental samples and chicken intestinal samples, including Erysipelothrix spp. that were detected in environmental samples. Sequences from Erysipelothrix spp. were most frequently detected in samples pre-cultured in ER-selective medium. At species level the presence of Erysipelothrix anatis and/or Erysipelothrix aquatica was indicated. Serological results indicated that IgY raised to ER showed some cross-reactivity with E. anatis. Hence, environmental samples pre-cultured in selective medium and analysis by 16S rRNA sequencing proved a useful method for detection of Erysipelotrichales, including Erysipelothrix spp., in chicken flocks. The observation of such bacteria in environmental samples offers a possible explanation for the observation of high antibody titres to ER in flocks without a history of clinical erysipelas.","PeriodicalId":94366,"journal":{"name":"Access microbiology","volume":"30 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141275922","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
Enhancement of growth media for extreme iron limitation in Escherichia coli 增强大肠杆菌的生长培养基以适应极端铁限制
Access microbiology Pub Date : 2024-06-01 DOI: 10.1099/acmi.0.000735.v4
James W. Southwell, Keith S. Wilson, Gavin H. Thomas, A. Duhme‐Klair
{"title":"Enhancement of growth media for extreme iron limitation in Escherichia coli","authors":"James W. Southwell, Keith S. Wilson, Gavin H. Thomas, A. Duhme‐Klair","doi":"10.1099/acmi.0.000735.v4","DOIUrl":"https://doi.org/10.1099/acmi.0.000735.v4","url":null,"abstract":"Iron is an essential nutrient for microbial growth and bacteria have evolved numerous routes to solubilize and scavenge this biometal, which is often present at very low concentrations in host tissue. We recently used a MOPS-based medium to induce iron limitation in Escherichia coli K-12 during the characterization of novel siderophore-conjugated antibiotics. In this study we confirm that growth media derived from commercially available M9 salts are unsuitable for studies of iron-limited growth, probably through the contamination of the sodium phosphate buffer components with over 100 µM iron. In contrast, MOPS-based media that are treated with metal-binding Chelex resin allow the free iron concentration to be reduced to growth-limiting levels. Despite these measures a small amount of E. coli growth is still observed in these iron-depleted media. By growing E. coli in conditions that theoretically increase the demand for iron-dependent enzymes, namely by replacing the glucose carbon source for acetate and by switching to a microaerobic atmosphere, we can reduce background growth even further. Finally, we demonstrate that by adding an exogeneous siderophore to the growth media which is poorly used by E. coli, we can completely prevent growth, perhaps mimicking the situation in host tissue. In conclusion, this short study provides practical experimental insight into low iron media and how to augment the growth conditions of E. coli for extreme iron-limited growth.","PeriodicalId":94366,"journal":{"name":"Access microbiology","volume":"74 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141280748","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
ELISA for leptospiral 3-hydroxyacyl-CoA dehydrogenase in urine is a promising screening tool for acute leptospirosis. 用酶联免疫吸附法检测尿液中的钩端螺旋体 3-羟基乙酰-CoA脱氢酶是一种很有前途的筛查急性钩端螺旋体病的工具。
Access microbiology Pub Date : 2024-05-31 eCollection Date: 2024-01-01 DOI: 10.1099/acmi.0.000651.v4
A K U I Karunadasa, C Toma, P Senaratne, K G R A Kumara, T M Herath, M M K Pathirage, C D Gamage
{"title":"ELISA for leptospiral 3-hydroxyacyl-CoA dehydrogenase in urine is a promising screening tool for acute leptospirosis.","authors":"A K U I Karunadasa, C Toma, P Senaratne, K G R A Kumara, T M Herath, M M K Pathirage, C D Gamage","doi":"10.1099/acmi.0.000651.v4","DOIUrl":"10.1099/acmi.0.000651.v4","url":null,"abstract":"<p><p><b>Introduction.</b> Leptospirosis is a zoonotic disease that is prevalent worldwide. Leptospiral 3-hydroxyacyl-CoA dehydrogenase (3-HADH) is excreted in the urine of infected individuals. However, the potential use of 3-HADH as a biomarker for the diagnosis of leptospirosis using enzyme-linked immunosorbent assay (ELISA) has not been investigated. A technique that identifies <i>Leptospira</i> in a patient in urine sample will be valuable in regular diagnostics and epidemic scenarios, as opposed to existing serological approaches. This study aimed to develop and evaluate an ELISA that can detect 3-HADH in the urine of patients with confirmed acute leptospirosis and to assess its potential as a screening test for leptospirosis. <b>Methods.</b> Laboratory confirmation of acute leptospirosis was done by <i>flaB</i>-nested polymerase chain reaction (PCR) of plasma samples from suspected patients. ELISA-based determination of the presence of 3-HADH in the urine of PCR-positive patients versus PCR-negative patients matched for fever date was performed by coating ELISA plates with urine supernatants and using rabbit anti-3-HADH as the primary antibody. Receiver operating characteristic curve analysis was used to determine the cutoff values for the ELISA. The diagnostic measures between the PCR-positive and PCR-negative patients were compared using the Mann-Whitney U test. <b>Results.</b> In total, 158 febrile patients were assessed, of whom 121 (76.6 %) were male. Of the 15 <i>flaB-</i>nested PCR-positive patients, 12 were in the acute phase of the febrile illness. The best cutoff was an average optical density (OD<sub>av</sub>) value of 0.2200 for febrile patients. Sensitivity and specificity were 83.33% [95 % confidence interval (CI), 51.59-97.91 %) and 83.33 % (95 % CI, 76.05-89.13 %), respectively. The OD<sub>av</sub> values for PCR-positive patients in the acute phase of the disease (≤7 days of fever) were significantly higher than those for PCR-negative patients (<i>P</i><0.001, <i>U</i>=114.0, <i>z</i>=-4.946). <b>Conclusion.</b> Detection of 3-HADH in urine by ELISA appears to be promising for the screening of acute leptospirosis in suspected patients.</p>","PeriodicalId":94366,"journal":{"name":"Access microbiology","volume":"6 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11165595/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141312705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Preparation of antiviral multispray with cationic antimicrobial dialkyldimethyl ammonium salt and sulfobetaine against new coronaviruses (SARS-CoV-2). 用阳离子抗菌剂二烷基二甲基铵盐和磺基甜菜碱制备抗新型冠状病毒(SARS-CoV-2)的多重喷雾剂。
Access microbiology Pub Date : 2024-05-31 eCollection Date: 2024-01-01 DOI: 10.1099/acmi.0.000631.v5
Masahiko Morioka, Daisuke Shimaoka, Mamoru Ohnishi
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