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Maraci Ö, Antonatou-Papaioannou A, Jünemann S, Schneeberger K, Schulze M, Scheffler I, Caspers BA. Bats, Bacteria, and Bat Smell V.2.0: Repeatable Sex-Specific Differences in Scent Organ Microbiota. MICROBIAL ECOLOGY 2024; 87:55. [PMID: 38530469 DOI: 10.1007/s00248-024-02368-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 03/18/2024] [Indexed: 03/28/2024]
Abstract
Reproducibility is a fundamental principle in science, ensuring reliable and valid findings. However, replication studies are scarce, particularly in ecology, due to the emphasis on novelty for publication. We explored the possibility of replicating original findings in the field of microbial and chemical ecology by conducting a conceptual replication of a previous study analysing the sex-specific differences in the microbial communities inhabiting the wing sacs, a scent organ with crucial functions in olfactory communication, of greater sac-winged bat (Saccopteryx bilineata). In the original study, the skin swabs from the antebrachial wing sacs of the males and wing sac rudiments of the females were analysed using culture-dependent methods to test sex-specific differences. The authors demonstrated that males have lower microbial richness and different microbial composition than females. We attempted to reproduce these findings using 16S rRNA sequencing, which offers improved accuracy in pinpointing microbial members than culture-dependent methods because of advanced statistical methods. Our study validated the original study's findings: Males had a lower microbial richness, and the community composition differed between the sexes. Furthermore, in the current study, males had an increased abundance of bacteria that might potentially be involved in odour production and degradation of malodorous substances and antimicrobial production. Our conceptual replication study corroborated that microbes can play a role in shaping their host's olfactory phenotype and consequently influence sexual selection. Furthermore, the current study emphasises the importance of replication efforts and hopefully encourages a culture that values replication studies in scientific practice.
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Affiliation(s)
- Öncü Maraci
- Department of Behavioural Ecology, Bielefeld University, Konsequenz 45, 33619, Bielefeld, Germany.
- Joint Institute for Individualisation in a Changing Environment (JICE), University of Münster and Bielefeld University, Münster, Germany.
| | - Anna Antonatou-Papaioannou
- Evolutionary Biology, Bielefeld University, Universitätsstrasse 25, 33615, Bielefeld, Germany
- Institute of Biology-Zoology, Freie Universität Berlin, 14195, Köning-Luise-Str. 1-3, Berlin, Germany
| | - Sebastian Jünemann
- Faculty of Technology, Bielefeld University, Universitätsstrasse 25, 33615, Bielefeld, Germany
- Institute for Bio- and Geosciences, IBG-5, Research Center Jülich, Bielefeld University, Universitätsstrasse 27, 33615, Bielefeld, Germany
| | - Karin Schneeberger
- Animal Ecology, Institute of Biochemistry and Biology, University of Potsdam, Maulbeerallee 1, 14469, Potsdam, Germany
| | - Michael Schulze
- Animal Ecology, Institute of Biochemistry and Biology, University of Potsdam, Maulbeerallee 1, 14469, Potsdam, Germany
| | - Ingo Scheffler
- Evolutionary Adaptive Genomics, Institute for Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Straße 24-26, 14476, Potsdam, Germany
| | - Barbara A Caspers
- Department of Behavioural Ecology, Bielefeld University, Konsequenz 45, 33619, Bielefeld, Germany
- Joint Institute for Individualisation in a Changing Environment (JICE), University of Münster and Bielefeld University, Münster, Germany
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Abell-King C, Pokhrel A, Rice SA, Duggin IG, Söderström B. Multispecies bacterial invasion of human host cells. Pathog Dis 2024; 82:ftae012. [PMID: 38794885 PMCID: PMC11180983 DOI: 10.1093/femspd/ftae012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 05/05/2024] [Accepted: 05/23/2024] [Indexed: 05/26/2024] Open
Abstract
Urinary tract infection (UTI), one of the most common bacterial infections worldwide, is a typical example of an infection that is often polymicrobial in nature. While the overall infection course is known on a macroscale, bacterial behavior is not fully understood at the cellular level and bacterial pathophysiology during multispecies infection is not well characterized. Here, using clinically relevant bacteria, human epithelial bladder cells and human urine, we establish co-infection models combined with high resolution imaging to compare single- and multi-species bladder cell invasion events in three common uropathogens: uropathogenic Escherichia coli (UPEC), Klebsiella pneumoniae and Enterococcus faecalis. While all three species invaded the bladder cells, under flow conditions the Gram-positive E. faecalis was significantly less invasive compared to the Gram-negative UPEC and K. pneumoniae. When introduced simultaneously during an infection experiment, all three bacterial species sometimes invaded the same bladder cell, at differing frequencies suggesting complex interactions between bacterial species and bladder cells. Inside host cells, we observed encasement of E. faecalis colonies specifically by UPEC. During subsequent dispersal from the host cells, only the Gram-negative bacteria underwent infection-related filamentation (IRF). Taken together, our data suggest that bacterial multispecies invasions of single bladder cells are frequent and support earlier studies showing intraspecies cooperation on a biochemical level during UTI.
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Affiliation(s)
- Charlotte Abell-King
- Australian Institute for Microbiology and Infection, University of Technology, Sydney, Ultimo, NSW, 2007, Australia
| | - Alaska Pokhrel
- Australian Institute for Microbiology and Infection, University of Technology, Sydney, Ultimo, NSW, 2007, Australia
| | - Scott A Rice
- Australian Institute for Microbiology and Infection, University of Technology, Sydney, Ultimo, NSW, 2007, Australia
- Microbiomes for One Systems Health and Agriculture and Food, CSIRO, Westmead NSW, 2145 Sydney, Australia
| | - Iain G Duggin
- Australian Institute for Microbiology and Infection, University of Technology, Sydney, Ultimo, NSW, 2007, Australia
| | - Bill Söderström
- Australian Institute for Microbiology and Infection, University of Technology, Sydney, Ultimo, NSW, 2007, Australia
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Sah RK, Dahal P, Parajuli R, Giri GR, Tuladhar E. Prevalence of blaCTX-M and blaTEM Genes in Cefotaxime-Resistant Escherichia coli Recovered from Tertiary Care at Central Nepal: A Descriptive Cross-Sectional Study. THE CANADIAN JOURNAL OF INFECTIOUS DISEASES & MEDICAL MICROBIOLOGY = JOURNAL CANADIEN DES MALADIES INFECTIEUSES ET DE LA MICROBIOLOGIE MEDICALE 2024; 2024:5517662. [PMID: 38226321 PMCID: PMC10789516 DOI: 10.1155/2024/5517662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 12/20/2023] [Accepted: 12/22/2023] [Indexed: 01/17/2024]
Abstract
Urinary tract infections (UTIs) are highly prevalent globally, and various antibiotics are employed for their treatment. However, the emergence of drug-resistant uropathogens towards these antibiotics causes a high rate of morbidity and mortality. This study was conducted at the Microbiology Laboratory of Grande International Hospital from November 2021 to May 2022 and aimed to assess the prevalence of UTI caused by Escherichia coli and their antibiotic susceptibility pattern with a focus on extended-spectrum beta-lactamases (ESBLs) and the prevalence of two genes (blaCTX-M and blaTEM) in cephalosporin-resistant E. coli. Altogether, 1050 urine samples were processed to obtain 165 isolates of E. coli. The isolates were identified by colony morphology and biochemical characteristics. Antimicrobial susceptibility tests (ASTs) were determined by the Kirby-Bauer disk diffusion method, and their ESBL enzymes were estimated by the combined disk method (CDM). Two ESBL genes (blaCTX-M and blaTEM) were investigated by polymerase chain reaction (PCR) in cefotaxime-resistant E. coli. Among the 1050 urine samples that were processed, 335 (31.9%) were culture-positive with 165 (49.2%) identified as E. coli. The age group ≥60 years (30.3%) had greater susceptibility to bacterial infections. AST revealed that meropenem was highly effective (95.7% susceptibility), while ampicillin showed the least sensitivity (42.4%). Among the E. coli isolates, 86 were multidrug resistant (MDR) and 10 were extensively drug resistant (XDR). Of these, 46 MDR (96%) and 2 XDR (4%) were ESBL producers. The prevalence of ESBL genes (blaCTX-M and blaTEM) was 49.3% and 54.8%, respectively. The overall accuracy of CDM as compared to PCR for the detection of the blaCTX-M gene was 55.26%. The prevalence of MDR E. coli harboring the blaCTX-M and blaTEM genes underscores the imperative role of ESBL testing in accurately identifying both beta-lactamase producers and nonproducers.
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Grilo T, Freire S, Miguel B, Martins LN, Menezes MF, Nordmann P, Poirel L, Sousa MJR, Aires-de-Sousa M. Occurrence of plasmid-mediated fosfomycin resistance (fos genes) among Escherichia coli isolates, Portugal. J Glob Antimicrob Resist 2023; 35:342-346. [PMID: 37553021 DOI: 10.1016/j.jgar.2023.08.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 08/02/2023] [Indexed: 08/10/2023] Open
Abstract
OBJECTIVES To evaluate the occurrence of plasmid-mediated fos genes among fosfomycin-resistant Escherichia coli isolates collected from patients in Lisbon, Portugal, and characterize the fos-positive strains. METHODS A total of 19 186 E. coli isolates were prospectively collected between April 2022 and January 2023 from inpatients and outpatients at a private laboratory in Lisbon. Fosfomycin resistance was initially assessed by semi-automated systems and further confirmed by the disc diffusion method. Resistant isolates were investigated for plasmid-mediated fos genes (fosA1-fosA10, fosC and fosL1-fosL2) and extended-spectrum beta-lactamases (ESBLs) by PCR and sequencing. Multilocus sequence typing was performed to evaluate the clonal relationship among fos-carrying isolates. RESULTS Out of the 19 186 E. coli isolates, 100 were fosfomycin-resistant (0.5%), out of which 15 carried a fosA-like gene (15%). The most prevalent fosfomycin-resistant determinant was fosA3 (n = 11), followed by fosA4 (n = 4). Among the 15 FosA-producing isolates, 10 co-produced an ESBL (67%), being either of CTX-M-15 (n = 8) or CTX-M-14 (n = 2) types. The fosA3 gene was carried on IncFIIA-, IncFIB-, and IncY-type plasmids, whereas fosA4 was always located on IncFIB-type plasmids. Most FosA4-producing isolates belonged to a single sequence type ST2161, whereas isolates carrying the fosA3 gene were distributed into nine distinct genetic backgrounds. CONCLUSION The prevalence of fosfomycin-resistant E. coli isolates is still low in Portugal. Notably, 15% of fosfomycin-resistant isolates harbour a transferable fosA gene, among which there is a high rate of ESBL producers, turning traditional empirical therapeutical options used in Portugal (fosfomycin and amoxicillin-clavulanic acid) ineffective.
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Affiliation(s)
- Teresa Grilo
- Laboratory of Molecular Biology, Portuguese Red Cross, Lisboa, Portugal
| | - Samanta Freire
- Laboratory of Molecular Biology, Portuguese Red Cross, Lisboa, Portugal
| | - Bruno Miguel
- Centro Medicina Laboratorial - Germano de Sousa, Lisboa, Portugal
| | | | - Maria Favila Menezes
- Centro Medicina Laboratorial - Germano de Sousa, Lisboa, Portugal; Hospital CUF Descobertas, Lisboa, Portugal
| | - Patrice Nordmann
- Medical and Molecular Microbiology Unit, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland; Swiss National Reference Center for Emerging Antibiotic Resistance (NARA), Fribourg, Switzerland
| | - Laurent Poirel
- Medical and Molecular Microbiology Unit, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland; Swiss National Reference Center for Emerging Antibiotic Resistance (NARA), Fribourg, Switzerland
| | - Maria José Rego Sousa
- Centro Medicina Laboratorial - Germano de Sousa, Lisboa, Portugal; Hospital CUF Descobertas, Lisboa, Portugal
| | - Marta Aires-de-Sousa
- Escola Superior de Saúde da Cruz Vermelha Portuguesa - Lisboa (ESSCVP-Lisboa), Lisboa, Portugal; Laboratory of Molecular Genetics, Instituto de Tecnologia Química e Biológica António Xavier (ITQB), Universidade Nova de Lisboa (UNL), Oeiras, Portugal.
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Chen R, Wang G, Wang Q, Zhang M, Wang Y, Wan Z, Si Z, Bai Y, Song Z, Lu X, Hao Y. Antimicrobial resistance and molecular epidemiology of carbapenem-resistant Escherichia coli from urinary tract infections in Shandong, China. Int Microbiol 2023; 26:1157-1166. [PMID: 37145384 DOI: 10.1007/s10123-023-00369-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 04/15/2023] [Accepted: 04/26/2023] [Indexed: 05/06/2023]
Abstract
OBJECTIVES Urinary tract infection (UTI) is one of the most common extraintestinal infections, and uropathogenic Escherichia coli (UPEC) is the main cause of UTIs. However, the ability to treat UTI has been compromised by the increase in antimicrobial resistance, especially carbapenem resistance. Here, we aimed to characterize the antimicrobial resistance and molecular epidemiology of carbapenem-resistant UPEC isolated in Shandong, China. METHODS In total, 17 carbapenem-resistant UPEC (CR-UPEC) isolates were collected from July 2017 to May 2020 in the Shandong Provincial Hospital. Whole-genome sequencing and bioinformatics analyses were performed to understand the molecular epidemiology of CR-UPEC. Phylogenetic groups, drug resistance genes, biofilm formation, and virulence-related gene profiles of the isolates were analyzed. Plasmid profiling and conjugation assay were performed to evaluate the ability to transfer carbapenem resistance-related genes to other E. coli isolates. Biofilm formation was also evaluated, as it is important for the persistence of infectious diseases. RESULTS We observed that 15 out of 17 CR-UPEC strains were blaNDM producers, among which 4 isolates could transfer blaNDM to recipient cells. The predominant sequence type was ST167 (6/17), followed by ST410 (3/17). The most prevalent phylogenetic group was phylogenetic group A (10/17), followed by phylogenetic group C (3/17). One isolate was resistant to polymyxin, which was caused by the carriage of a transferable plasmid harboring mcr-1. Statistical analysis did not reveal any significant difference in the carriage rate of fimbriae-coding genes between strong and weak biofilm producers. CONCLUSIONS Our observations may assist in developing new therapeutic methods for drug-resistant organisms.
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Affiliation(s)
- Ran Chen
- Department of Clinical Laboratory, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, Shandong, China
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 9677# Jing-Shi Road, Jinan, 250014, People's Republic of China
| | - Guili Wang
- Department of Clinical Laboratory, Beijing Xiao Tang Shan Hospital, Beijing, 102200, China
| | - Qian Wang
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 9677# Jing-Shi Road, Jinan, 250014, People's Republic of China
| | - Meng Zhang
- Department of Clinical Laboratory, Liaocheng Second People's Hospital, Liaocheng, 252600, Shandong, China
| | - Yueling Wang
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 9677# Jing-Shi Road, Jinan, 250014, People's Republic of China
| | - Zhongkun Wan
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 9677# Jing-Shi Road, Jinan, 250014, People's Republic of China
| | - Zaifeng Si
- Department of Clinical Laboratory, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, Shandong, China
| | - Yuanyuan Bai
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 9677# Jing-Shi Road, Jinan, 250014, People's Republic of China
| | - Zhen Song
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 9677# Jing-Shi Road, Jinan, 250014, People's Republic of China
| | - Xinglun Lu
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 9677# Jing-Shi Road, Jinan, 250014, People's Republic of China
| | - Yingying Hao
- Department of Clinical Laboratory, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, Shandong, China.
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 9677# Jing-Shi Road, Jinan, 250014, People's Republic of China.
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Khatoon I, Khanam S, Azam A, Qadeer S, Naz S, Hassan NU. Incidence Pattern, Antibiotic Susceptibility Pattern and Associated Risk Factors of Bacterial Uropathogens Among General Population of Pakistan. Infect Drug Resist 2023; 16:4995-5005. [PMID: 37551281 PMCID: PMC10404436 DOI: 10.2147/idr.s418045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 06/21/2023] [Indexed: 08/09/2023] Open
Abstract
Purpose Urinary tract infections (UTIs) are of the most common bacterial infections in Pakistan. Rapid increase in antibiotic resistance has resulted in a limited number of treatment options available. This study aimed to determine the incidence patterns of uropathogens, their antimicrobial susceptibility pattern and risk factors for UTI among the general population. Methods This laboratory-based cross-sectional study was conducted between November 2020 and March 2021. Urine samples were collected, cultured and bacterial isolates were identified. Bacterial isolates were tested for antimicrobial susceptibility. Data regarding socio-demographic characteristics, clinical features and risk factors were collected using structured questionnaire. Results Of 459 urine samples, 299 (65.1%) showed positive urine cultures (105 CFU/mL). Both gram-negative and gram-positive isolates were obtained, with a prevalence of 230 (76.9%) and 69 (23%), respectively. Escherichia coli was the predominant bacteria isolated 146 (48.8%), and it showed most susceptibility to cefoperazone and imipenem. Most of the gram-negative isolates were resistant towards ampicillin. Most risk factors were not significantly associated with UTI, except for age, income, and previous history of hospitalization. Conclusion UTI is an important problem in the study area, with a prevalence rate of 65%. All bacterial isolates developed resistance towards most antibiotics available on the market. Therefore, there is a need to develop management strategies based on susceptibility pattern of uropathogens. Additionally, proper public education regarding causes of disease transmission and control strategies is required.
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Affiliation(s)
- Iram Khatoon
- Department of Zoology, Women University Swabi, Swabi, Khyber Pakhtunkhwa, Pakistan
| | - Surrya Khanam
- Department of Zoology, Women University Swabi, Swabi, Khyber Pakhtunkhwa, Pakistan
| | - Asima Azam
- Department of Zoology, Shaheed Benazir Bhutto Women University, Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - Saima Qadeer
- Department of Zoology, Division of Science & Technology, University of Education Lahore, Lahore, Punjab, 54000, Pakistan
| | - Shumaila Naz
- Department of Biological Sciences, National University of Medical Sciences, Rawalpindi, Punjab, Pakistan
| | - Najm Ul Hassan
- Department of Microbiology, Abdul Wali Khan University, Mardan, Khyber Pakhtunkhwa, Pakistan
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Kim YB, Whon TW, Kim JY, Kim J, Kim Y, Lee SH, Park SE, Kim EJ, Son HS, Roh SW. In-depth metataxonomic investigation reveals low richness, high intervariability, and diverse phylotype candidates of archaea in the human urogenital tract. Sci Rep 2023; 13:11746. [PMID: 37474649 PMCID: PMC10359320 DOI: 10.1038/s41598-023-38710-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 07/13/2023] [Indexed: 07/22/2023] Open
Abstract
The urogenital microbiota is the potential principal factor in the pathophysiology of urinary tract infection and the protection of urinary tract health. Little is known about the urogenital archaeome although several reports have indicated that the archaeomes of various regions of the human body are associated with health. Accordingly, we aimed to determine the presence and diversity of archaeomes in the human urogenital tract. To explore the urogenital archaeome, voided urine specimens from 373 asymptomatic Korean individuals were used. No difference was observed in body mass index, age, or gender, according to presence of archaea. Analysis of archaeal 16S rRNA gene amplicons of archaea positive samples consisted of simple community structures, including diverse archaea, such as the phyla Methanobacteriota, Thermoproteota, and Halobacteriota. Asymptomatic individuals showed high participant-dependent intervariability in their urogenital archaeomes. The mean relative archaeal abundance was estimated to be 0.89%, and fluorescence in situ hybridisation micrographs provided evidence of archaeal cells in the human urogenital tract. In addition, the urogenital archaeome shared partial taxonomic compositional characteristics with those of the other body sites. In this study, Methanobacteriota, Thermoproteota, and Halobacteriota were suggested as inhabitants of the human urogenital tract, and a distinct human urogenital archaeome was characterised. These findings expand our knowledge of archaea-host associations in the human urogenital tract and may lead to novel insights into the role of archaea in urinary tract health.
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Affiliation(s)
- Yeon Bee Kim
- Kimchi Functionality Research Group, World Institute of Kimchi, Gwangju, 61755, Republic of Korea
- Interdisciplinary Program in Agricultural Genomics, College of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Tae Woong Whon
- Kimchi Functionality Research Group, World Institute of Kimchi, Gwangju, 61755, Republic of Korea
| | - Joon Yong Kim
- Microbiome Research Team, LISCure Biosciences Inc, Gyeonggi-do, 13486, Republic of Korea
| | - Juseok Kim
- Microbiome Research Team, LISCure Biosciences Inc, Gyeonggi-do, 13486, Republic of Korea
| | - Yujin Kim
- Kimchi Functionality Research Group, World Institute of Kimchi, Gwangju, 61755, Republic of Korea
| | - Se Hee Lee
- Kimchi Functionality Research Group, World Institute of Kimchi, Gwangju, 61755, Republic of Korea
| | - Seong-Eun Park
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Eun-Ju Kim
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Hong-Seok Son
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea.
| | - Seong Woon Roh
- Microbiome Research Team, LISCure Biosciences Inc, Gyeonggi-do, 13486, Republic of Korea.
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Bezati S, Velliou M, Ventoulis I, Simitsis P, Parissis J, Polyzogopoulou E. Infection as an under-recognized precipitant of acute heart failure: prognostic and therapeutic implications. Heart Fail Rev 2023:10.1007/s10741-023-10303-8. [PMID: 36897491 PMCID: PMC9999079 DOI: 10.1007/s10741-023-10303-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/20/2023] [Indexed: 03/11/2023]
Abstract
As the prevalence of heart failure (HF) continues to rise, prompt diagnosis and management of various medical conditions, which may lead to HF exacerbation and result in poor patient outcomes, are of paramount importance. Infection has been identified as a common, though under-recognized, precipitating factor of acute heart failure (AHF), which can cause rapid development or deterioration of HF signs and symptoms. Available evidence indicates that infection-related hospitalizations of patients with AHF are associated with higher mortality, protracted length of stay, and increased readmission rates. Understanding the intricate interaction of both clinical entities may provide further therapeutic strategies to prevent the occurrence of cardiac complications and improve prognosis of patients with AHF triggered by infection. The purpose of this review is to investigate the incidence of infection as a causative factor in AHF, explore its prognostic implications, elucidate the underlying pathophysiological mechanisms, and highlight the basic principles of the initial diagnostic and therapeutic interventions in the emergency department.
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Affiliation(s)
- Sofia Bezati
- Emergency Medicine Department, Attikon University Hospital, Rimini 1, Chaidari, 12462, Athens, Greece.
| | - Maria Velliou
- Emergency Medicine Department, Attikon University Hospital, Rimini 1, Chaidari, 12462, Athens, Greece
| | - Ioannis Ventoulis
- Department of Occupational Therapy, University of Western Macedonia, Keptse Area, Ptolemaida, 50200, Greece
| | - Panagiotis Simitsis
- National and Kapodistrian University of Athens, 2nd Department of Cardiology, Heart Failure Unit, Attikon University Hospital, Athens, Greece
| | - John Parissis
- Emergency Medicine Department, Attikon University Hospital, Rimini 1, Chaidari, 12462, Athens, Greece.,Emergency Medicine Department, National and Kapodistrian University of Athens, Athens, Greece
| | - Effie Polyzogopoulou
- Emergency Medicine Department, Attikon University Hospital, Rimini 1, Chaidari, 12462, Athens, Greece.,Emergency Medicine Department, National and Kapodistrian University of Athens, Athens, Greece
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Liu L, Law COK, Nie Q, Pham HQ, Ma H, Zhang L, Ho PL, Lau TCK. Comparative analysis of outer membrane vesicles from uropathogenic Escherichia coli reveal the role of aromatic amino acids synthesis proteins in motility. Int J Med Microbiol 2023; 313:151573. [PMID: 36634604 DOI: 10.1016/j.ijmm.2023.151573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 12/15/2022] [Accepted: 01/05/2023] [Indexed: 01/09/2023] Open
Abstract
Uropathogenic Escherichia coli (UPEC) are causative agent that causes urinary tract infections (UTIs) and the recent emergence of multidrug resistance (MDR) of UPEC increases the burden on the community. Recent studies of bacterial outer membrane vesicles (OMV) identified various factors including proteins, nucleic acids, and small molecules which provided inter-cellular communication within the bacterial population. However, the components of UPEC-specific OMVs and their functional role remain unclear. Here, we systematically determined the proteomes of UPEC-OMVs and identified the specific components that provide functions to the recipient bacteria. Based on the functional network of OMVs' proteomes, a group of signaling peptides was found in all OMVs which provide communication among bacteria. Moreover, we demonstrated that treatment with UPEC-OMVs affected the motility and biofilm formation of the recipient bacteria, and further identified aromatic amino acid (AAA) biosynthesis proteins as the key factors to provide their movement.
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Affiliation(s)
- LiangZhe Liu
- Department of Biomedical Sciences, College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region; Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518000, China; Center for Clinical Precision Pharmacy, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, China; School of Clinical Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Carmen Oi Kwan Law
- Department of Biomedical Sciences, College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region; Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518000, China
| | - Qichang Nie
- Department of Biomedical Sciences, College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region; Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518000, China
| | - Hoa Quynh Pham
- Department of Biomedical Sciences, College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region; Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518000, China
| | - Haiying Ma
- Department of Biomedical Sciences, College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region
| | - Liang Zhang
- Department of Biomedical Sciences, College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region
| | - Pak Leung Ho
- Department of Microbiology, Queen Mary Hospital, University of Hong Kong, Hong Kong Special Administrative Region
| | - Terrence Chi-Kong Lau
- Department of Biomedical Sciences, College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region; Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518000, China.
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Taha, Elgamoudi BA, Andrianova EP, Haselhorst T, Day CJ, Hartley-Tassell LE, King RM, Najnin T, Zhulin IB, Korolik V. Diverse Sensory Repertoire of Paralogous Chemoreceptors Tlp2, Tlp3, and Tlp4 in Campylobacter jejuni. Microbiol Spectr 2022; 10:e0364622. [PMID: 36374080 PMCID: PMC9769880 DOI: 10.1128/spectrum.03646-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 10/19/2022] [Indexed: 11/16/2022] Open
Abstract
Campylobacter jejuni responds to extracellular stimuli via transducer-like chemoreceptors (Tlps). Here, we describe receptor-ligand interactions of a unique paralogue family of dCache_1 (double Calcium channels and chemotaxis) chemoreceptors: Tlp2, Tlp3, and Tlp4. Phylogenetic analysis revealed that Tlp2, Tlp3, and Tlp4 receptors may have arisen through domain duplications, followed by a divergent evolutionary drift, with Tlp3 emerging more recently, and unexpectedly, responded to glycans, as well as multiple organic and amino acids with overlapping specificities. All three Tlps interacted with five monosaccharides and complex glycans, including Lewis's antigens, P antigens, and fucosyl GM1 ganglioside, indicating a potential role in host-pathogen interactions. Analysis of chemotactic motility of single, double, and triple mutants indicated that these chemoreceptors are likely to work together to balance responses to attractants and repellents to modulate chemotaxis in C. jejuni. Molecular docking experiments, in combination with saturation transfer difference nuclear magnetic resonance spectroscopy and competition surface plasmon resonance analysis, illustrated that the ligand-binding domain of Tlp3 possess one major binding pocket with two overlapping, but distinct binding sites able to interact with multiple ligands. A diverse sensory repertoire could provide C. jejuni with the ability to modulate responses to attractant and repellent signals and allow for adaptation in host-pathogen interactions. IMPORTANCE Campylobacter jejuni responds to extracellular stimuli via transducer-like chemoreceptors (Tlps). This remarkable sensory perception mechanism allows bacteria to sense environmental changes and avoid unfavorable conditions or to maneuver toward nutrient sources and host cells. Here, we describe receptor-ligand interactions of a unique paralogue family of chemoreceptors, Tlp2, Tlp3, and Tlp4, that may have arisen through domain duplications, followed by a divergent evolutionary drift, with Tlp3 emerging more recently. Unlike previous reports of ligands interacting with sensory proteins, Tlp2, Tlp3, and Tlp4 responded to many types of chemical compounds, including simple and complex sugars such as those present on human blood group antigens and gangliosides, indicating a potential role in host-pathogen interactions. Diverse sensory repertoire could provide C. jejuni with the ability to modulate responses to attractant and repellent signals and allow for adaptation in host-pathogen interactions.
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Affiliation(s)
- Taha
- Institute for Glycomics, Griffith University, Gold Coast, Queensland, Australia
| | - Bassam A. Elgamoudi
- Institute for Glycomics, Griffith University, Gold Coast, Queensland, Australia
| | - Ekaterina P. Andrianova
- Department of Microbiology and Translational Data Analytics Institute, The Ohio State University, Columbus, Ohio, USA
| | - Thomas Haselhorst
- Institute for Glycomics, Griffith University, Gold Coast, Queensland, Australia
| | - Christopher J. Day
- Institute for Glycomics, Griffith University, Gold Coast, Queensland, Australia
| | | | - Rebecca M. King
- Institute for Glycomics, Griffith University, Gold Coast, Queensland, Australia
| | - Tahria Najnin
- Institute for Glycomics, Griffith University, Gold Coast, Queensland, Australia
| | - Igor B. Zhulin
- Department of Microbiology and Translational Data Analytics Institute, The Ohio State University, Columbus, Ohio, USA
| | - Victoria Korolik
- Institute for Glycomics, Griffith University, Gold Coast, Queensland, Australia
- School of Pharmacy and Medical Science, Griffith University, Gold Coast, Queensland, Australia
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SP P, R ASK, KS J. Insights from the molecular docking analysis of compounds from Vitex negundoi with targets from Klebsiella pneumoniai causing urinary tract infection. Bioinformation 2022; 18:1062-1068. [PMID: 37693077 PMCID: PMC10484700 DOI: 10.6026/973206300181062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/29/2022] [Accepted: 11/30/2022] [Indexed: 09/12/2023] Open
Abstract
Antimicrobial resistance among bacterial strains has emerged out to be a serious threat and contributes to the loss of effectiveness of the common antibiotics. New Delhi metallo-β-lactamase-1 (blaNDM-1) is an enzyme present in several pathogenic bacteria with a high incidence in Klebsiella pneumoniaie and plays a crucial role in the development of antibacterial resistance. Mur enzymes are also important alternative drug targets in addition to blaNDM-1 which are crucial for the survival of the bacteria. Vitex negundoi is an aromatic medicinaltree with proven antibacterial properties. Fifteen compounds from V. negundo were evaluated for their inhibitory effects on the target proteins blaNDM-1, Mur C, Mur E and Mur F of K. pneumoniae through molecular docking using the Glide (xp) module of Schrodinger. ADME toxicity was also predicted for all the fifteen compounds in the QikProp module. The docking results revealed that the compounds agnuside, negundoside and isoorientin showed promising inhibitory effects on all four targets blaNDM-1, Mur C, Mur E and Mur F of K. pneumoniae with docking scores greater than -7 kcal/mol and reasonable hydrogen bond interactions. The findings of this study provide a lead for developing novel drugs against potent multidrug-resistant K. pneumoniae.
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Affiliation(s)
- Preetha SP
- Department of Bioinformatics, Bharathidasan University, Tiruchirappalli - 620024
- Department of Veterinary Pharmacology and Toxicology, Madras Veterinary College, Tamil Nadu Veterinary and Animal Sciences University, Chennai - 600007
| | | | - Jayachandran KS
- Department of Bioinformatics, Bharathidasan University, Tiruchirappalli - 620024
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12
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Comparative Analysis of Complicated Urinary Tract Infections Caused by Extensively Drug-Resistant Pseudomonas aeruginosa and Extended-Spectrum β-Lactamase-Producing Klebsiella pneumoniae. Antibiotics (Basel) 2022; 11:antibiotics11111511. [PMID: 36358167 PMCID: PMC9686592 DOI: 10.3390/antibiotics11111511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 10/24/2022] [Accepted: 10/26/2022] [Indexed: 11/17/2022] Open
Abstract
The objective was to compare clinical characteristics, outcomes, and economic differences in complicated urinary tract infections (cUTI) caused by extensively drug-resistant Pseudomonas aeruginosa (XDR P. aeruginosa) and extended-spectrum beta-lactamase-producing Klebsiella pneumoniae (ESBL-K. pneumoniae). A retrospective study was conducted at a tertiary care hospital. Patients with XDR P. aeruginosa and ESBL-K. pneumoniae cUTIs were compared. The primary outcome was clinical failure at day 7 and at the end of treatment (EOT). Secondary outcomes: 30- and 90-day mortality, microbiological eradication, and economic cost. Two-hundred and one episodes were included, of which 24.8% were bloodstream infections. Patients with XDR P. aeruginosa cUTI more frequently received inappropriate empirical therapy (p < 0.001). Nephrotoxicity due to antibiotics was only observed in the XDR P. aeruginosa group (26.7%). ESBL-K. pneumoniae cUTI was associated with worse eradication rates, higher recurrence, and higher infection-related readmission. In multivariate analysis, XDR P. aeruginosa was independently associated with clinical failure on day 7 of treatment (OR 4.34, 95% CI 1.71−11.04) but not at EOT, or with mortality. Regarding hospital resource consumption, no significant differences were observed between groups. XDR P. aeruginosa cUTI was associated with worse early clinical cures and more antibiotic side effects than ESBL-K. pneumoniae infections. However, no differences in mortality or in hospitalization costs were observed.
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Radera S, Srivastava S, Agarwal J. Virulence Genotyping and Multidrug Resistance Pattern of Escherichia coli Isolated From Community-Acquired and Hospital-Acquired Urinary Tract Infections. Cureus 2022; 14:e29404. [DOI: 10.7759/cureus.29404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/08/2022] [Indexed: 11/05/2022] Open
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14
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Bhargava K, Nath G, Bhargava A, Kumari R, Aseri GK, Jain N. Bacterial profile and antibiotic susceptibility pattern of uropathogens causing urinary tract infection in the eastern part of Northern India. Front Microbiol 2022; 13:965053. [PMID: 36016776 PMCID: PMC9396120 DOI: 10.3389/fmicb.2022.965053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 07/15/2022] [Indexed: 11/27/2022] Open
Abstract
Urinary tract infection (UTI) is a common infectious disease that affects men and women. It is a significant health concern due to multidrug-resistant (MDR) organisms. Therefore, it is necessary to have a current understanding of the antibiotic susceptibility (AS) pattern of uropathogens to manage UTI effectively. Since the bacterial pathogen causing UTI and its AS vary with time and place, the prevailing AS pattern of the causative agents are essential for empirical antibiotic therapy. This study aims to determine the prevalence and AS of uropathogens isolated from UTI patients in the eastern part of Northern India. The study was carried out between November 2018 and December 2019. Clean catch midstream urine samples were collected and processed using standard guidelines for microbiological procedures. Positive microbiological cultures were found in 333 of the 427 patients, where 287 were gram-negative bacteria (GNB), and 46 were gram-positive bacteria (GPB). Females had a higher prevalence of UTI (60.7%) than males (39.3%) (p = 0.00024). The most susceptible age group in females was 18–50 years as compared to males, whereas at the age of 51–80 years and >80 years males were more susceptible than females (p = 0.053). The most prevalent pathogen identified were Escherichia coli (55.0%), followed by Proteus sp. (6.9%), Klebsiella pneumoniae (6.6%), Pseudomonas aeruginosa (6.3%), of which 96.0% were MDR bacteria. The susceptibility pattern of our study also revealed that amikacin, gentamycin and imipenem were the most effective drugs against GNB. In contrast, nitrofurantoin, vancomycin, and chloramphenicol were the most effective drugs against GPB. According tothe findings, MDR pathogens are very much prevalent. Since UTI is one of the most frequent bacterial diseases, proper management necessitates extensive investigation and implementation of antibiotic policy based on AS patterns for a particular region.
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Affiliation(s)
- Kanika Bhargava
- Amity Institute of Microbial Technology, Amity University Rajasthan, Jaipur, India
- Department of Microbiology, Institute of Medical Sciences (IMS), Banaras Hindu University, Varanasi, India
| | - Gopal Nath
- Department of Microbiology, Institute of Medical Sciences (IMS), Banaras Hindu University, Varanasi, India
- Gopal Nath,
| | - Amit Bhargava
- Department of Medicine, Hayes Memorial Hospital, Sam Higginbottom University of Agriculture, Technology and Sciences (SHUATS), Allahabad, India
| | - Ritu Kumari
- Department of Microbiology, Institute of Medical Sciences (IMS), Banaras Hindu University, Varanasi, India
| | - G. K. Aseri
- Amity Institute of Microbial Technology, Amity University Rajasthan, Jaipur, India
| | - Neelam Jain
- Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur, India
- *Correspondence: Neelam Jain,
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Lima WG, Batista Filho FL, Lima IP, Simião DC, Brito JCM, da Cruz Nizer WS, Cardoso VN, Fernandes SOA. Antibacterial, anti-biofilm, and anti-adhesive activities of melittin, a honeybee venom-derived peptide, against quinolone-resistant uropathogenic Escherichia coli (UPEC). Nat Prod Res 2022; 36:6381-6388. [PMID: 35073796 DOI: 10.1080/14786419.2022.2032047] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Here, we demonstrated the in vitro and in vivo antibacterial and anti-biofilm activities of melittin, a peptide derived from honeybee venom, against uropathogenic Escherichia coli (UPEC) resistant to quinolones. The minimum inhibitory concentration (MIC) of melittin varied from 0.5 to 8 μM. The bactericidal effect was considered rapid and potent (ranging from 3.0 to 6.0 h after incubation) against a quinolone-resistant and Extended Spectrum Beta-lactamase (ESBL)-producing UPEC strain. Prior exposure to melittin did not reduce the MIC of the quinolones tested, but it decreased the MIC of ceftizoxime by 8-fold due to its ability to form pores in the membrane. Furthermore, melittin disrupted mature biofilms (39.58% at 32 μM) and inhibited the adhesion of this uropathogen to the surfaces of urethral catheter. These results show that melittin is a promising molecule that can be incorporated into invasive urethral medical devices to prevent urinary infections caused by multidrug-resistant UPECs.
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Affiliation(s)
- William Gustavo Lima
- Laboratório de Radioisótopos, Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Francisco Leandro Batista Filho
- Laboratório de Radioisótopos, Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Iasmin Pinheiro Lima
- Laboratório de Radioisótopos, Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Daniela Carolina Simião
- Laboratório de Radioisótopos, Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | | | - Valbert Nascimento Cardoso
- Laboratório de Radioisótopos, Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Simone Odília Antunes Fernandes
- Laboratório de Radioisótopos, Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
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González-Villalobos E, Ribas-Aparicio RM, Belmont-Monroy L, Aparicio-Ozores G, Manjarrez-Hernández HÁ, Gavilanes-Parra S, Balcázar JL, Molina-López J. Identification and characterization of class 1 integrons among multidrug-resistant uropathogenic Escherichia coli strains in Mexico. Microb Pathog 2021; 162:105348. [PMID: 34871727 DOI: 10.1016/j.micpath.2021.105348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 11/30/2021] [Accepted: 12/01/2021] [Indexed: 10/19/2022]
Abstract
This study aimed to identify and characterize integrons among multidrug-resistant (MDR) uropathogenic Escherichia coli (UPEC) from outpatients in Mexico City, Mexico. PCR assays were used to screen for the presence of class 1, 2 and 3 integrons, whose PCR products were sequenced to identify the inserted gene cassettes within the variable regions. Out of 83 tested strains, 53 (63.9%) were positive for the presence of class 1 integrons, whereas no integrons were detected in the remaining strains, regardless of their classes. Most of the strains carrying the intI1 gene belonged to the extraintestinal B2 (41.5%) and commensal A (32.1%) phylogroups, and to a lesser extent, the extraintestinal D (20.8%) and commensal B1 (5.7%) phylogroups. Moreover, 8 different gene cassette arrangements were detected, with dfrA17 and aadA5 being the most common (32.1% of the class 1 integron-positive strains), which confer resistance to trimethoprim/sulfamethoxazole and aminoglycosides, respectively. Our results suggest that class 1 integrons are widely distributed among MDR-UPEC strains in Mexico, which may directly or indirectly contribute to the selection of MDR strains. These findings are important for a better understanding of the factors and mechanisms that promote multidrug resistance among UPEC strains.
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Affiliation(s)
- Edgar González-Villalobos
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas (ENCB), Instituto Politécnico Nacional (IPN), Mexico City, 11340, Mexico; Unidad Periférica de Investigación Básica y Clínica en Enfermedades Infecciosas, Departamento de Salud Pública, División de Investigación, Facultad de Medicina, UNAM, Mexico City, 04510, Mexico; Laboratorio de Patogenicidad Bacteriana, Unidad de Hemato-Oncología e Investigación, Hospital Infantil de México Federico Gómez, Facultad de Medicina, UNAM, Mexico City, 06720, Mexico; Catalan Institute for Water Research (ICRA), Girona, 17003, Spain.
| | - Rosa María Ribas-Aparicio
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas (ENCB), Instituto Politécnico Nacional (IPN), Mexico City, 11340, Mexico.
| | - Laura Belmont-Monroy
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas (ENCB), Instituto Politécnico Nacional (IPN), Mexico City, 11340, Mexico; Unidad Periférica de Investigación Básica y Clínica en Enfermedades Infecciosas, Departamento de Salud Pública, División de Investigación, Facultad de Medicina, UNAM, Mexico City, 04510, Mexico; Laboratorio de Patogenicidad Bacteriana, Unidad de Hemato-Oncología e Investigación, Hospital Infantil de México Federico Gómez, Facultad de Medicina, UNAM, Mexico City, 06720, Mexico.
| | - Gerardo Aparicio-Ozores
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas (ENCB), Instituto Politécnico Nacional (IPN), Mexico City, 11340, Mexico.
| | - H Ángel Manjarrez-Hernández
- Departamento de Salud Pública, Facultad de Medicina, UNAM. Mexico City, 04510, Mexico; Unidad Periférica de Patogénesis Bacteriana, Hospital General Dr. Manuel Gea González, Tlalpan, Mexico City, 14080, Mexico.
| | - Sandra Gavilanes-Parra
- Departamento de Salud Pública, Facultad de Medicina, UNAM. Mexico City, 04510, Mexico; Unidad Periférica de Patogénesis Bacteriana, Hospital General Dr. Manuel Gea González, Tlalpan, Mexico City, 14080, Mexico.
| | - José Luis Balcázar
- Catalan Institute for Water Research (ICRA), Girona, 17003, Spain; University of Girona. Girona, 17004, Spain.
| | - José Molina-López
- Unidad Periférica de Investigación Básica y Clínica en Enfermedades Infecciosas, Departamento de Salud Pública, División de Investigación, Facultad de Medicina, UNAM, Mexico City, 04510, Mexico; Laboratorio de Patogenicidad Bacteriana, Unidad de Hemato-Oncología e Investigación, Hospital Infantil de México Federico Gómez, Facultad de Medicina, UNAM, Mexico City, 06720, Mexico.
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Mohammed Mohsen S, Wisam malik A. Prevalence of antibodies in Iraqi Urinary Tract Infection patients using radial immunodiffusion (RID) assay. BIONATURA 2021. [DOI: 10.21931/rb/2021.06.04.23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Urinary Tract Infection (UTI) is an infection every place in the urinary tract that may be in the urethra, bladder, or kidneys by microbes. Greatest UTIs are affected by bacteria, but some are affected by fungi and, in rare cases, by viruses. UTI is the most significant common infection in humans. This study deals with the prevalence of antibodies in UTI patients; this study aims to determine the level of antibodies in UTI patients and compare with healthy controls by using the radial immunodiffusion (RID) test. The study was done during the period November 2019 to April 2020 on UTI Iraqi patients. The study included 40 patients and 20 healthy controls. Results show UTI infection occurs in females more than males also; the mean age is 40 years. All the patients with UTI showed decreased IgM serum levels and increased IgG compared with the control group. IgG, IgG, and IgM showed high significance between two UTI patients and the control group groups, while IgM doesn’t show significant differences between study groups.
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Affiliation(s)
| | - Anas Wisam malik
- Middle Technical University, Baquba Technical Institute, Baquba, Iraq
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Interleukin-6 mediates delirium-like phenotypes in a murine model of urinary tract infection. J Neuroinflammation 2021; 18:247. [PMID: 34711238 PMCID: PMC8554965 DOI: 10.1186/s12974-021-02304-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 10/20/2021] [Indexed: 01/06/2023] Open
Abstract
Background Urinary tract infection (UTI) is frequently implicated as a precipitant of delirium, which refers to an acute confusional state that is associated with high mortality, increased length of stay, and long-term cognitive decline. The pathogenesis of delirium is thought to involve cytokine-mediated neuronal dysfunction of the frontal cortex and hippocampus. We hypothesized that systemic IL-6 inhibition would mitigate delirium-like phenotypes in a mouse model of UTI. Methods C57/BL6 mice were randomized to either: (1) non-UTI control, (2) UTI, and (3) UTI + anti-IL-6 antibody. UTI was induced by transurethral inoculation of 1 × 108Escherichia coli. Frontal cortex and hippocampus-mediated behaviors were evaluated using functional testing and corresponding structural changes were evaluated via quantification of neuronal cleaved caspase-3 (CC3) by immunohistochemistry and western blot. IL-6 in the brain and plasma were evaluated using immunohistochemistry, ELISA, and RT-PCR. Results Compared to non-UTI control mice, mice with UTI demonstrated significantly greater impairments in frontal and hippocampus-mediated behaviors, specifically increased thigmotaxis in Open Field (p < 0.05) and reduced spontaneous alternations in Y-maze (p < 0.01), while treatment of UTI mice with systemic anti-IL-6 fully reversed these functional impairments. These behavioral impairments correlated with frontal and hippocampal neuronal CC3 changes, with significantly increased frontal and hippocampal CC3 in UTI mice compared to non-UTI controls (p < 0.0001), and full reversal of UTI-induced CC3 neuronal changes following treatment with systemic anti-IL-6 antibody (p < 0.0001). Plasma IL-6 was significantly elevated in UTI mice compared to non-UTI controls (p < 0.01) and there were positive and significant correlations between plasma IL-6 and frontal CC3 (r2 = 0.5087/p = 0.0028) and frontal IL-6 and CC3 (r2 = 0.2653, p < 0.0001). Conclusions These data provide evidence for a role for IL-6 in mediating delirium-like phenotypes in a mouse model of UTI. These findings provide pre-clinical justification for clinical investigations of IL-6 inhibitors to treat UTI-induced delirium. Supplementary Information The online version contains supplementary material available at 10.1186/s12974-021-02304-x.
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Rivoarilala LO, Victor J, Crucitti T, Collard JM. LAMP assays for the simple and rapid detection of clinically important urinary pathogens including the detection of resistance to 3rd generation cephalosporins. BMC Infect Dis 2021; 21:1037. [PMID: 34615472 PMCID: PMC8495977 DOI: 10.1186/s12879-021-06720-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 09/15/2021] [Indexed: 11/16/2022] Open
Abstract
Background Timely and accurate identification of uropathogens and determination of their antimicrobial susceptibility is paramount to the management of urinary tract infections (UTIs). The main objective of this study was to develop an assay using LAMP (Loop mediated isothermal amplification) technology for simple, rapid and sensitive detection of the most common bacteria responsible for UTIs, as well as for the detection of the most prevalent genes (encoding cefotaximases from CTX-M group 1) responsible for resistance to 3rd generation of cephalosporins. Method We designed primers targeting Proteus mirabilis, while those targeting Escherichia coli, Klebsiella pneumoniae and Enterococcus faecalis and the CTX-M group 1 resistance gene were benchmarked from previous studies. The amplification reaction was carried out in a warm water bath for 60 min at 63 ± 0.5 °C. The amplicons were revealed by staining with Sybr Green I. Specificity and sensitivity were determined using reference DNA extracts spiked in sterile urine samples. The analytical performance of the assays was evaluated directly on pellets of urine samples from patients suspected of UTI and compared with culture. Results We found a high specificity (100%) for LAMP assays targeting the selected bacteria (P. mirabilis, E. coli, K. pneumoniae, E. faecalis) and the CTX-M group 1 when using DNA extracts spiked in urine samples. The sensitivities of the assays were around 1.5 103 Colony Forming Units (CFU) /mL corresponding to the cut-off value used to define bacteriuria or UTIs in patients with symptoms. Out of 161 urine samples tested, using culture as gold standard, we found a sensitivity of the LAMP techniques ranging from 96 to 100% and specificity from 95 to 100%. Conclusion We showed that the LAMP assays were simple and fast. The tests showed high sensitivity and specificity using a simple procedure for DNA extraction. In addition, the assays could be performed without the need of an expensive device such as a thermal cycler. These LAMP assays could be useful as an alternative or a complementary tool to culture reducing the time to diagnosis and guiding for more effective treatment of UTIs but also as a powerful diagnostic tool in resource-limited countries where culture is not available in primary health care structures. Supplementary Information The online version contains supplementary material available at 10.1186/s12879-021-06720-5.
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Affiliation(s)
| | | | - Tania Crucitti
- Experimental Bacteriology Unit, Institut Pasteur de Madagascar, Antananarivo, Madagascar
| | - Jean Marc Collard
- Experimental Bacteriology Unit, Institut Pasteur de Madagascar, Antananarivo, Madagascar.,Experimental Bacteriology Laboratory, Center for Microbes, Development and Health (CMDH), Institut Pasteur of Shanghai/Chinese Academy of Sciences, Shanghai, People's Republic of China
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20
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Faggian M, Bernabè G, Valente M, Francescato S, Baratto G, Brun P, Castagliuolo I, Dall'Acqua S, Peron G. Characterization of PACs profile and bioactivity of a novel nutraceutical combining cranberry extracts with different PAC-A oligomers, D-mannose and ascorbic acid: An in vivo/ex vivo evaluation of dual mechanism of action on intestinal barrier and urinary epithelium. Food Res Int 2021; 149:110649. [PMID: 34600651 DOI: 10.1016/j.foodres.2021.110649] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 08/04/2021] [Accepted: 08/17/2021] [Indexed: 11/26/2022]
Abstract
In this paper, an A-type procyanidin (PAC)-rich cranberry extract (CB-B) was obtained mixing different extracts and was formulated with D-mannose and ascorbic acid to obtain a novel nutraceutical (URO-F) aimed at preventing non-complicated bacterial urinary tract infections (UTIs). To assess the bioactivity of CB-B and URO-F, urine samples collected from six healthy volunteers undergoing a 2-days oral consumption of 0.41 g/day of CB-B or 10 g/day of URO-F (corresponding to 72 mg/day of PACs) were tested against uropathogenic E. coli (UPEC) incubated on urinary bladder epithelial cells (T24). Urinary markers of CB-B and URO-F consumption were assessed in the same urine output by UPLC-QTOF-based untargeted metabolomics approach. CB-B and URO-F were evaluated for their ability to promote the intestinal barrier function by restoring the trans-epithelial electrical resistance (TEER) and to inhibit the production of inflammatory cytokines in intestinal epithelial Caco2 cells. CB-B was characterized by a high PAC-A content (70% of total PACs) and a broad distribution of different PACs polymers (dimers-hexamers). Urine from subjects consuming CB-B and URO-F showed a significant effect in reducing the adhesion of UPEC to urothelium in vitro, supporting their efficacy as anti-adhesive agents after oral intake. CB-B inhibited the release of cytokine IL-8, and both products were effective in restoring the TEER. Overall, our results show that the beneficial effects of CB-B and URO-F on UTIs are not only due to the antiadhesive activity of cranberry on UPEC in the urothelium, but also to a multi-target activity involving anti-inflammatory and permeability-enhancing effects on intestinal epithelium.
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Affiliation(s)
- Marta Faggian
- Unired srl, Via Niccolò Tommaseo 69, 35131 Padova, Italy.
| | - Giulia Bernabè
- Department of Molecular Medicine, University of Padova, Via Gabelli 63, 35121 Padova, Italy.
| | - Marco Valente
- Unifarco spa, Via Cal Longa 62, 32035 Santa Giustina, Belluno, Italy.
| | | | - Gianni Baratto
- Unired srl, Via Niccolò Tommaseo 69, 35131 Padova, Italy; Unifarco spa, Via Cal Longa 62, 32035 Santa Giustina, Belluno, Italy.
| | - Paola Brun
- Department of Molecular Medicine, University of Padova, Via Gabelli 63, 35121 Padova, Italy.
| | - Ignazio Castagliuolo
- Department of Molecular Medicine, University of Padova, Via Gabelli 63, 35121 Padova, Italy.
| | - Stefano Dall'Acqua
- Unired srl, Via Niccolò Tommaseo 69, 35131 Padova, Italy; Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy.
| | - Gregorio Peron
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy.
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21
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Zeng Q, Xiao S, Gu F, He W, Xie Q, Yu F, Han L. Antimicrobial Resistance and Molecular Epidemiology of Uropathogenic Escherichia coli Isolated From Female Patients in Shanghai, China. Front Cell Infect Microbiol 2021; 11:653983. [PMID: 34485168 PMCID: PMC8414883 DOI: 10.3389/fcimb.2021.653983] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 07/28/2021] [Indexed: 11/21/2022] Open
Abstract
Urinary tract infection (UTI) is one of the most common bacterial infections and UTI is the most common extraintestinal infectious disease entity in women worldwide. Uropathogenic Escherichia coli (UPEC) is the leading cause of UTI. While antimicrobial resistance has emerged as one of the principal problems of UTI, little is known about the epidemiology of UPEC isolated from female patients in Shanghai. This study aimed to describe the antimicrobial resistance and molecular epidemiology of UPEC isolated from female patients in Shanghai, China. UPEC isolates were collected from female patients from July 2019 to June 2020 in Shanghai and a total of 151 isolates were obtained randomly. Antimicrobial susceptibility testing was performed using the disk diffusion method. Multilocus sequencing type, phylogenetic groups, antimicrobial resistance genes, and virulence genes were detected by polymerase chain reaction. In our study, no carbapenem-resistant isolates were found, but fluoroquinolone-resistant and multi-drug resistant UPEC accounted for 62.25% and 42.38%, respectively. The phylogenetic group B2 (58.94%) predominated, followed by phylogenetic group D (26.49%). The most prevalent sequence type was ST1193 (25.83%), which was first reported in Shanghai. The rate of extended-spectrum β-lactamase (ESBL)-positive isolates was 39.74% and the dominant ESBL genotype was blaCTX-M-14 (21/60), followed by blaCTX-M-55 (12/60). Mutations in gyrA were detected in the majority of fluoroquinolone-resistant isolates (90/94), followed by parC (85/94) and parE (71/94). The aac (3) -IIa was also found in 85% of aminoglycoside resistance isolates. Among 151 UPEC isolates, the common virulence genes were csgA (97.35%), fimH (92.72%), sitA (82.12%), and malX (65.56%). In conclusion, the high antimicrobial resistance of UPEC isolated from female patients, harboring a series of virulence genes, are troublesome for medical practitioners in Shanghai. At present, the prevalent ST1193 and emerging blaCTX-M-55 make UTI therapy more challenging.
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Affiliation(s)
- Qian Zeng
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Clinical Microbiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shuzhen Xiao
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Clinical Microbiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Feifei Gu
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Clinical Microbiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Weiping He
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Clinical Microbiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qing Xie
- Department of Infectious Diseases, Translational Laboratory of Liver Diseases, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Fangyou Yu
- Department of Clinical Laboratory Medicine, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Lizhong Han
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Clinical Microbiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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22
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Manoharan A, Ognenovska S, Paino D, Whiteley G, Glasbey T, Kriel FH, Farrell J, Moore KH, Manos J, Das T. N-Acetylcysteine Protects Bladder Epithelial Cells from Bacterial Invasion and Displays Antibiofilm Activity against Urinary Tract Bacterial Pathogens. Antibiotics (Basel) 2021; 10:900. [PMID: 34438950 PMCID: PMC8388742 DOI: 10.3390/antibiotics10080900] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/20/2021] [Accepted: 07/20/2021] [Indexed: 01/24/2023] Open
Abstract
Introduction: Urinary tract infections (UTIs) affect more than 150 million individuals annually. A strong correlation exists between bladder epithelia invasion by uropathogenic bacteria and patients with recurrent UTIs. Intracellular bacteria often recolonise epithelial cells post-antibiotic treatment. We investigated whether N-acetylcysteine (NAC) could prevent uropathogenic E. coli and E. faecalis bladder cell invasion, in addition to its effect on uropathogens when used alone or in combination with ciprofloxacin. Methods: An invasion assay was performed in which bacteria were added to bladder epithelial cells (BECs) in presence of NAC and invasion was allowed to occur. Cells were washed with gentamicin, lysed, and plated for enumeration of the intracellular bacterial load. Cytotoxicity was evaluated by exposing BECs to various concentrations of NAC and quantifying the metabolic activity using resazurin at different exposure times. The effect of NAC on the preformed biofilms was also investigated by treating 48 h biofilms for 24 h and enumerating colony counts. Bacteria were stained with propidium iodide (PI) to measure membrane damage. Results: NAC completely inhibited BEC invasion by multiple E. coli and E. faecalis clinical strains in a dose-dependent manner (p < 0.01). This was also evident when bacterial invasion was visualised using GFP-tagged E. coli. NAC displayed no cytotoxicity against BECs despite its intrinsic acidity (pH ~2.6), with >90% cellular viability 48 h post-exposure. NAC also prevented biofilm formation by E. coli and E. faecalis and significantly reduced bacterial loads in 48 h biofilms when combined with ciprofloxacin. NAC visibly damaged E. coli and E. faecalis bacterial membranes, with a threefold increase in propidium iodide-stained cells following treatment (p < 0.05). Conclusions: NAC is a non-toxic, antibiofilm agent in vitro and can prevent cell invasion and IBC formation by uropathogens, thus providing a potentially novel and efficacious treatment for UTIs. When combined with an antibiotic, it may disrupt bacterial biofilms and eliminate residual bacteria.
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Affiliation(s)
- Arthika Manoharan
- Department of Infectious Diseases and Immunology, School of Medical Sciences, Charles Perkins Centre, The University of Sydney, Sydney, NSW 2006, Australia; (A.M.); (D.P.); (J.F.); (J.M.)
| | - Samantha Ognenovska
- Department of Urogynaecology, St George Hospital, University of New South Wales, Sydney, NSW 2052, Australia; (S.O.); (K.H.M.)
| | - Denis Paino
- Department of Infectious Diseases and Immunology, School of Medical Sciences, Charles Perkins Centre, The University of Sydney, Sydney, NSW 2006, Australia; (A.M.); (D.P.); (J.F.); (J.M.)
| | - Greg Whiteley
- Whiteley Corporation, 19–23 Laverick Avenue, Tomago, NSW 2319, Australia; (G.W.); (T.G.); (F.H.K.)
| | - Trevor Glasbey
- Whiteley Corporation, 19–23 Laverick Avenue, Tomago, NSW 2319, Australia; (G.W.); (T.G.); (F.H.K.)
| | - Frederik H. Kriel
- Whiteley Corporation, 19–23 Laverick Avenue, Tomago, NSW 2319, Australia; (G.W.); (T.G.); (F.H.K.)
| | - Jessica Farrell
- Department of Infectious Diseases and Immunology, School of Medical Sciences, Charles Perkins Centre, The University of Sydney, Sydney, NSW 2006, Australia; (A.M.); (D.P.); (J.F.); (J.M.)
- Whiteley Corporation, 19–23 Laverick Avenue, Tomago, NSW 2319, Australia; (G.W.); (T.G.); (F.H.K.)
| | - Kate H. Moore
- Department of Urogynaecology, St George Hospital, University of New South Wales, Sydney, NSW 2052, Australia; (S.O.); (K.H.M.)
| | - Jim Manos
- Department of Infectious Diseases and Immunology, School of Medical Sciences, Charles Perkins Centre, The University of Sydney, Sydney, NSW 2006, Australia; (A.M.); (D.P.); (J.F.); (J.M.)
| | - Theerthankar Das
- Department of Infectious Diseases and Immunology, School of Medical Sciences, Charles Perkins Centre, The University of Sydney, Sydney, NSW 2006, Australia; (A.M.); (D.P.); (J.F.); (J.M.)
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23
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Baker JL, Dahlberg T, Bullitt E, Andersson M. Impact of an alpha helix and a cysteine-cysteine disulfide bond on the resistance of bacterial adhesion pili to stress. Proc Natl Acad Sci U S A 2021; 118:e2023595118. [PMID: 34011607 PMCID: PMC8166124 DOI: 10.1073/pnas.2023595118] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Escherichia coli express adhesion pili that mediate attachment to host cell surfaces and are exposed to body fluids in the urinary and gastrointestinal tracts. Pilin subunits are organized into helical polymers, with a tip adhesin for specific host binding. Pili can elastically unwind when exposed to fluid flow forces, reducing the adhesin load, thereby facilitating sustained attachment. Here we investigate biophysical and structural differences of pili commonly expressed on bacteria that inhabit the urinary and intestinal tracts. Optical tweezers measurements reveal that class 1a pili of uropathogenic E. coli (UPEC), as well as class 1b of enterotoxigenic E. coli (ETEC), undergo an additional conformational change beyond pilus unwinding, providing significantly more elasticity to their structure than ETEC class 5 pili. Examining structural and steered molecular dynamics simulation data, we find that this difference in class 1 pili subunit behavior originates from an α-helical motif that can unfold when exposed to force. A disulfide bond cross-linking β-strands in class 1 pili stabilizes subunits, allowing them to tolerate higher forces than class 5 pili that lack this covalent bond. We suggest that these extra contributions to pilus resiliency are relevant for the UPEC niche, since resident bacteria are exposed to stronger, more transient drag forces compared to those experienced by ETEC bacteria in the mucosa of the intestinal tract. Interestingly, class 1b ETEC pili include the same structural features seen in UPEC pili, while requiring lower unwinding forces that are more similar to those of class 5 ETEC pili.
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Affiliation(s)
- Joseph L Baker
- Department of Chemistry, The College of New Jersey, Ewing, NJ 08628;
| | | | - Esther Bullitt
- Department of Physiology & Biophysics, Boston University School of Medicine, Boston, MA 02118
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24
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Adekanmbi AO, Usidamen S, Onilude AA. Molecular characterization of ESBL- producing uropathogenic Escherichia coli recovered from urine samples of patients attending a University Teaching hospital in Nigeria. Acta Microbiol Immunol Hung 2021. [PMID: 33964125 DOI: 10.1556/030.2021.01380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Accepted: 02/09/2021] [Indexed: 11/19/2022]
Abstract
Infection of the urinary tract ranks as one of the most common infections affecting people worldwide and its treatment is made complicated by the rising incidence of antibiotic resistance. This study aimed to detect extended spectrum beta-lactamase (ESBL) genes and antibiotic resistance profile of uropathogenic Escherichia coli (E. coli) recovered from patients attending a University Teaching hospital in Nigeria. Uropathogenic E. coli isolates were obtained from the culture collection of Department of Microbiology and Parasitology of the University Teaching hospital for a period of four months (October 2019-January, 2020). Antibiotic susceptibility testing was done using the disc diffusion method while phenotypic ESBL production was detected using double disc synergy test (DDST). Detection of β-lactamase genes was done using Real-Time PCR. Forty-nine E. coli isolates were recovered from 120 urine samples, with 24 (49%) being ESBL positive. The resistance to antibiotics in the ESBL producers was: ciprofloxacin (100%), cefotaxime (100%), cefpodoxime (100%), tetracycline (95.7%), ceftazidime (56.7%), amoxicillin-clavulanate (50%), gentamicin (33.3%), and imipenem (0%). All the ESBL producers carried blaTEM, blaCTX-M-1 and blaCTX-M-9, 75% (18/24) carried blaSHV, while blaCTX-M-2, blaCTX-M-8 and blaCTX-M-25 groups were detected in 20.8% (5/24) of the isolates. There was co-occurrence of CTX-M, SHV and TEM β-lactamases in 79.2% (19/24) isolates, while five isolates (20.8%) co-harbored blaCTX-M and blaTEM. This study showed a high level of multidrug resistance and ESBL gene carriage in uropathogenic E. coli obtained in this study, suggesting a likely review of therapeutic options in the treatment of UTI to clamp down on the rising cases of antibiotic resistance.
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Affiliation(s)
- Abimbola Olumide Adekanmbi
- 1Environmental Microbiology and Biotechnology Laboratory, Department of Microbiology, University of Ibadan, Nigeria
| | - Sandra Usidamen
- 2Pathogenic Microbiology Laboratory, Department of Microbiology, University of Ibadan, Nigeria
| | - Anthony Abiodun Onilude
- 3Microbial Physiology and Biochemistry Laboratory, Department of Microbiology, University of Ibadan, Nigeria
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25
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Kuznetsova MV, Gizatullina JS. Epidemiological characteristics of uropatogenic isolates of Escherichia coli in hospitals. Klin Lab Diagn 2021; 66:248-256. [PMID: 33878248 DOI: 10.51620/0869-2084-2021-66-4-248-256] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The aim of the study was to evaluate the genetic affinity of uropathogenic E. coli cultures (UPEC) and to identify the major types of extended spectrum beta-lactamases (ESBL) found among nosocomial isolates. A molecular typing of UPEC (n=93) isolated from patients with urinary tract infections (UTI) who were hospitalised in nine medical facilities (MO) in Perm was performed. It was found that 69.89% of the cultures had individual RAPD/ERIC profiles, the remaining 30.10% were distributed among 13 genome groups. Most frequently blaCTX-M-1 was detected individually or in combination with other beta-lactamase genes (n=23, 79.31% of ESBL phenotype-positive isolates), genes were detected in seventeen cases (58.62%) blaTEM and/or blaOXA, the blaCMY fragment was found in only three isolates (10.34%), blaSHV was missing in this isolates. It was shown that in two thirds of the cases the pathogens of the infection process are representatives of the endogenous intestinal microbiota of the patients, in other cases an exogenous infection occurs. The proportion of "circulating" (possibly hospital) isolates in the spectrum of UTI increased in the series: therapy departments - surgery departments - intensive care units. In addition, in multidisciplinary hospitals there are conditions for cross-infections of patients, but the epidemiological chains of episodes of UTI are short and concise. It has been shown that the probability of infection with E. coli producing CTX-M or OXA enzymes is significantly higher in the intensive care unit than in surgery or therapy departments. The data obtained complement the understanding of the epidemiology of UTI caused by E. coli and can be used as an aid in the planning and implementation of methods for the prevention and control of nosocomial UTI.
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Affiliation(s)
- M V Kuznetsova
- Institute of Ecology and Genetic of Microorganisms Ural Branch Russian Academy of Sciences
| | - J S Gizatullina
- Institute of Ecology and Genetic of Microorganisms Ural Branch Russian Academy of Sciences
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26
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Raplee I, Walker L, Xu L, Surathu A, Chockalingam A, Stewart S, Han X, Rouse R, Li Z. Emergence of nosocomial associated opportunistic pathogens in the gut microbiome after antibiotic treatment. Antimicrob Resist Infect Control 2021; 10:36. [PMID: 33588951 PMCID: PMC7885457 DOI: 10.1186/s13756-021-00903-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 01/25/2021] [Indexed: 12/12/2022] Open
Abstract
Introduction According to the Centers for Disease Control’s 2015 Hospital Acquired Infection Hospital Prevalence Survey, 1 in 31 hospital patients was infected with at least one nosocomial pathogen while being treated for unrelated issues. Many studies associate antibiotic administration with nosocomial infection occurrence. However, to our knowledge, there is little to no direct evidence of antibiotic administration selecting for nosocomial opportunistic pathogens. Aim This study aims to confirm gut microbiota shifts in an animal model of antibiotic treatment to determine whether antibiotic use favors pathogenic bacteria. Methodology We utilized next-generation sequencing and in-house metagenomic assembly and taxonomic assignment pipelines on the fecal microbiota of a urinary tract infection mouse model with and without antibiotic treatment. Results Antibiotic therapy decreased the number of detectable species of bacteria by at least 20-fold. Furthermore, the gut microbiota of antibiotic treated mice had a significant increase of opportunistic pathogens that have been implicated in nosocomial infections, like Acinetobacter calcoaceticus/baumannii complex, Chlamydia abortus, Bacteroides fragilis, and Bacteroides thetaiotaomicron. Moreover, antibiotic treatment selected for antibiotic resistant gene enriched subpopulations for many of these opportunistic pathogens. Conclusions Oral antibiotic therapy may select for common opportunistic pathogens responsible for nosocomial infections. In this study opportunistic pathogens present after antibiotic therapy harbored more antibiotic resistant genes than populations of opportunistic pathogens before treatment. Our results demonstrate the effects of antibiotic therapy on induced dysbiosis and expansion of opportunistic pathogen populations and antibiotic resistant subpopulations of those pathogens. Follow-up studies with larger samples sizes and potentially controlled clinical investigations should be performed to confirm our findings.
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Affiliation(s)
- Isaac Raplee
- Division of Applied Regulatory Science, Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| | - Lacey Walker
- Division of Applied Regulatory Science, Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| | - Lei Xu
- Division of Applied Regulatory Science, Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| | - Anil Surathu
- Division of Applied Regulatory Science, Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| | - Ashok Chockalingam
- Division of Applied Regulatory Science, Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| | - Sharron Stewart
- Division of Applied Regulatory Science, Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| | - Xiaomei Han
- Division of Applied Regulatory Science, Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| | - Rodney Rouse
- Division of Applied Regulatory Science, Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| | - Zhihua Li
- Division of Applied Regulatory Science, Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA.
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27
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Recurrent Urinary Tract Infection in Women: Primary Care Referral Patterns in a Tertiary Care Center. Female Pelvic Med Reconstr Surg 2021; 27:118-120. [DOI: 10.1097/spv.0000000000000752] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Zaki MES, El Salam MA, Faried OA. Study of Plasmid-Mediated Quinolone Resistance in Escherichia coli from Nosocomial Urinary Tract Infections. Infect Disord Drug Targets 2021; 21:243-247. [PMID: 32433009 DOI: 10.2174/1871526520666200520112319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 12/24/2019] [Accepted: 04/10/2020] [Indexed: 06/11/2023]
Abstract
The aim of the present study was to study the prevalence of plasmid-mediated quinolone resistance (PMQR) genes (qnrA, qnrB, qnrC, qnrD, qnrS, qepA, oqxA, oqxB and aac) in Escherichia coli (E. coli) isolated from patients with nosocomial urinary tract infections (UTIs) and its relation to the extended-spectrum β-lactamase (ESBL) production. ; Methods: A cross-sectional study was carried out on 200 non-duplicated isolates of E. coli isolated from patients with nosocomial UTIs. E.coli isolates were subjected to antibiotic susceptibility testing by disc diffusion method, determination of minimum inhibitory concentrations (MICs) of ciprofloxacin by Epsillometer (E) test strips, detection of ESBL production by double disc synergy method and detection of qnrA, qnrB, qnrC, qnrD, qnrS, qepA, oqxA, oqxB and aac genes by polymerase chain reaction (PCR). ; Results: The antimicrobial susceptibility testing of the isolated E. coli revealed a high frequency of resistance to ampicillin (73.5%), ceftazidime (72%) and imipenem (71.5%). The less frequent resistance was for aztreonam (21.5%), amikacin (36.5%) and gentamicin (38.5%). ESBL production was found in 131 isolates (65.5%) and phenotypic quinolone resistance was detected by MIC in 65 isolates (32.5%), with 52.3% of them showed high resistance to ciprofloxacin with an MIC more than 32 μg/ml. PMQR genes were found in 40 isolates. The frequency of the detected genes was 40%, 37.5%, 35%, 20% and 5% for qnrA, qnrS, qepA, qnrB and oqxA, respectively. Significant association was found between the presence of PMQR genes and ESBL production (P=0.0001). ; Conclusion: The study highlights the prevalence of PMQR genes in E. coli with high association with the ESBL phenotype. This finding is a sign of limited therapeutic options for E. coli.
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Affiliation(s)
| | - Mostafa Abd El Salam
- Nephrology Unit, Internal Medicine Department, Mansoura Faculty of Medicine, Mansoura, Egypt
| | - Osama Ahmed Faried
- Medical Microbiology and Immunology Department, Faculty of Medicine, Beni-suef University, Egypt
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29
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Varney AM, Smitten KL, Thomas JA, McLean S. Transcriptomic Analysis of the Activity and Mechanism of Action of a Ruthenium(II)-Based Antimicrobial That Induces Minimal Evolution of Pathogen Resistance. ACS Pharmacol Transl Sci 2020; 4:168-178. [PMID: 33615170 DOI: 10.1021/acsptsci.0c00159] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Indexed: 01/30/2023]
Abstract
Increasing concern over rising levels of antibiotic resistance among pathogenic bacteria has prompted significant research into developing efficacious alternatives to antibiotic treatment. Previously, we have reported on the therapeutic activity of a dinuclear ruthenium(II) complex against pathogenic, multi-drug-resistant bacterial pathogens. Herein, we report that the solubility properties of this lead are comparable to those exhibited by orally available therapeutics that in comparison to clinically relevant antibiotics it induces very slow evolution of resistance in the uropathogenic, therapeutically resistant, E. coli strain EC958, and this resistance was lost when exposure to the compound was temporarily removed. With the aim of further investigating the mechanism of action of this compound, the regulation of nine target genes relating to the membrane, DNA damage, and other stress responses provoked by exposure to the compound was also studied. This analysis confirmed that the compound causes a significant transcriptional downregulation of genes involved in membrane transport and the tricarboxylic acid cycle. By contrast, expression of the chaperone protein-coding gene, spy, was significantly increased suggesting a requirement for repair of damaged proteins in the region of the outer membrane. The complex was also found to display activity comparable to that in E. coli in a range of other therapeutically relevant Gram-negative pathogens.
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Affiliation(s)
- Adam M Varney
- School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, United Kingdom
| | - Kirsty L Smitten
- Department of Chemistry, The University of Sheffield, Western Bank, Sheffield S3 7HF, United Kingdom
| | - Jim A Thomas
- Department of Chemistry, The University of Sheffield, Western Bank, Sheffield S3 7HF, United Kingdom
| | - Samantha McLean
- School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, United Kingdom
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30
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Wang P, Wang J, Xie Z, Zhou J, Lu Q, Zhao Y, Dong C, Zou L. Depletion of multidrug-resistant uropathogenic Escherichia coli BC1 by ebselen and silver ion. J Cell Mol Med 2020; 24:13139-13150. [PMID: 32975381 PMCID: PMC7701569 DOI: 10.1111/jcmm.15920] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 08/19/2020] [Accepted: 09/07/2020] [Indexed: 12/18/2022] Open
Abstract
Ebselen, an organo‐selenium compound with well‐characterized toxicology and pharmacology, recently exhibited potent antibacterial activity against glutathione (GSH)‐negative bacteria by disrupting redox homeostasis. In this paper, we show that ebselen and silver ion in combination exert strong bactericidal activity against multidrug‐resistant (MDR) uropathogenic Escherichia coli (UPEC) BC1, a model MDR GSH‐positive bacterium. The mechanisms were found to involve consumption of total intracellular GSH and inhibition of thioredoxin reductase activity, which was highly related to reactive oxygen species up‐regulation. Furthermore, the therapeutic efficacy of ebselen and silver ion against UPEC‐induced cystitis was assessed in a mouse model. Treatment with ebselen and silver ion significantly reduced bacterial loads, down‐regulated the expression levels of tumour necrosis factor‐α (TNF‐α) and interferon‐γ (IFN‐γ) on‐site and decreased white/red blood cell counts in mild cystitis model mice, which demonstrated the anti‐inflammatory property of these agents. In addition, ebselen and silver ion also exhibited significantly high protective ability (100%) against acute cystitis infections. These results together may lay the foundation for further analysis and development of ebselen and silver ion as antibacterial agents for treatment of MDR UPEC infections.
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Affiliation(s)
- Peng Wang
- The First College of Clinical Medical Science, China Three Gorges University, Yichang, Hubei, China.,The Institute of Infection and Inflammation, Medical College, China Three Gorges University, Yichang, Hubei, China.,Central Laboratory, The People's Hospital of China Three Gorges University, Yichang, Hubei, China
| | - Jun Wang
- The Institute of Infection and Inflammation, Medical College, China Three Gorges University, Yichang, Hubei, China.,Central Laboratory, The People's Hospital of China Three Gorges University, Yichang, Hubei, China
| | - Zonglan Xie
- The First College of Clinical Medical Science, China Three Gorges University, Yichang, Hubei, China
| | - Jingxuan Zhou
- The Institute of Infection and Inflammation, Medical College, China Three Gorges University, Yichang, Hubei, China.,Central Laboratory, The People's Hospital of China Three Gorges University, Yichang, Hubei, China
| | - Qianqian Lu
- The Institute of Infection and Inflammation, Medical College, China Three Gorges University, Yichang, Hubei, China.,Central Laboratory, The People's Hospital of China Three Gorges University, Yichang, Hubei, China
| | - Ying Zhao
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, China
| | - Chuanjiang Dong
- The First College of Clinical Medical Science, China Three Gorges University, Yichang, Hubei, China
| | - Lili Zou
- The First College of Clinical Medical Science, China Three Gorges University, Yichang, Hubei, China.,The Institute of Infection and Inflammation, Medical College, China Three Gorges University, Yichang, Hubei, China.,Central Laboratory, The People's Hospital of China Three Gorges University, Yichang, Hubei, China
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31
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Mohsenzadeh M, Abtahi-Eivary SH, Pirouzi A, Khaledi A, Rahimi M. A systematic review and meta-analysis of urinary tract infection, frequency of IS elements and MDR isolates retrieved from adult patients. GENE REPORTS 2020. [DOI: 10.1016/j.genrep.2020.100707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Antimicrobial activity of three plant species against multi-drug resistant E. coli causing urinary tract infection. J Herb Med 2020. [DOI: 10.1016/j.hermed.2020.100352] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Rasoulinasab M, Shahcheraghi F, Feizabadi MM, Nikmanesh B, Hajihasani A, Sabeti S, Aslani MM. Distribution of Pathogenicity Island Markers and H-Antigen Types of Escherichia coli O25b/ST131 Isolates from Patients with Urinary Tract Infection in Iran. Microb Drug Resist 2020; 27:369-382. [PMID: 32716242 DOI: 10.1089/mdr.2019.0485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Escherichia coli serogroup O25b-sequence type 131 (E. coli O25b/ST131) is known as a multidrug-resistant organism with high virulence potential and has received attention internationally. We aim to investigate the prevalence of O25b/ST131 and the distribution of blaCTX-M-15, pathogenicity island (PAI) markers, phylogenetic groups, and H-antigen typing in the E. coli O25b/ST131 isolated from patients with urinary tract infection (UTI) in Tehran, the capital of Iran. Seventy (26.9%) E. coli isolates were identified as O25b/ST131. There was also a significant difference in the prevalence of virulence genes, including papA, sfa, sat, cnf1, iutA, kpMII, traT, and usp, in the O25b/ST131 isolates rather than non-O25b/ST131 ones (p ≤ 0.05). Furthermore, 78% of the O25b/ST131 isolates carried four to seven PAIs, while 71% of non-O25b/ST131 isolates carried two to four PAI markers (p ≤ 0.05). Our study showed that in addition to H4, other H-antigens may play a role in the O25b/ST131 virulence potential. Besides, a significant association was found between the history of previous UTIs and infection among the O25b/ST131 clone isolates. Pulsed-field gel electrophoresis revealed circulating of O25b:H4-ST131/PST43 clone in both hospital and community. Approximately one in every three uropathogenic E. coli isolates was the O25b/ST131 clone, representing a significant public health threat. Practical investigation on O25b/ST131 can be helpful in better understanding of ST131 evolution and controlling UTI in hospitals.
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Affiliation(s)
| | | | - Mohammad Mehdi Feizabadi
- Department of Microbiology, Faculty of Medicine, Tehran University of Medical Science, Tehran, Iran
| | - Bahram Nikmanesh
- Department of Medical Laboratory Sciences, School of Allied Medical Sciences, Tehran University of Medical Sciences, Tehran, Iran
| | - Azade Hajihasani
- Department of Bacteriology, Pasteur Institute of Iran, Tehran, Iran
| | - Shahram Sabeti
- Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Tessema NN, Ali MM, Zenebe MH. Bacterial associated urinary tract infection, risk factors, and drug susceptibility profile among adult people living with HIV at Haswassa University Comprehensive Specialized Hospital, Hawassa, Southern Esthiopia. Sci Rep 2020; 10:10790. [PMID: 32612139 PMCID: PMC7330024 DOI: 10.1038/s41598-020-67840-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Accepted: 06/10/2020] [Indexed: 11/09/2022] Open
Abstract
People living with human immunodeficiency virus (HIV) are more likely to develop urinary tract infections (UTI) due to the suppression of their immunity. The aim of this study was to determine the prevalence, risk factors of UTI, and drug susceptibility pattern of bacteria isolated among peoples infected with HIV. A hospital-based cross-sectional study was conducted among 224 HIV positive individuals attending Hawassa University Comprehensive Specialized Hospital (HUCSH) from September 17 to November 16, 2018. Midstream urine was collected from all study participants and inoculated on to Blood and MacConkey agar. Bacterial isolates were characterized by Gram stain and standard biochemical tests. Kirby-Bauer method was used for antimicrobial susceptibility testing. Sociodemographic and clinical data were collected by a semi-structured questionnaire. Data were analyzed using SPSS version 20. A bivariate and a multivariable regression model were employed to determine the association between dependent and independent variables. From the total 224 study participants, 23 (10.3%) (95% CI 6.7-14.7) had culture-confirmed UTIs. The distributions of the bacteria were as follows: Escherichia coli 16 (69.6%), Staphylococcus aureus 2 (8.7%), Klebsiella pneumoniae 2 (8.7%), Enterobacter aerogenes 2 (8.7%) and Pseudomonas species 1 (4.3%). UTI prevalence was also high among study participants with a previous history of UTI and CD4+ count < 200/mm3. Female study participants were about five times more likely to have UTI (AOR 5.3, 95% CI 1.5-19.2). Ninety-three percent of bacteria isolated were susceptible to nitrofurantoin, ceftriaxone, and gentamycin; 87.5% were susceptible to meropenem and norfloxacin; whereas 93.8%, 68.8%, and 62.5% of isolates were resistant to ampicillin, tetracycline, and cotrimoxazole respectively. Multidrug resistance (MDR) was seen in 18 (78.3%) of bacterial isolates.
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Affiliation(s)
| | - Musa Mohammed Ali
- School of Medical Laboratory Science, Hawassa University College of Medicine and Health Sciences, Awassa, Ethiopia.
| | - Mengistu Hyilemeriam Zenebe
- School of Medical Laboratory Science, Hawassa University College of Medicine and Health Sciences, Awassa, Ethiopia
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Xu L, Surathu A, Raplee I, Chockalingam A, Stewart S, Walker L, Sacks L, Patel V, Li Z, Rouse R. The effect of antibiotics on the gut microbiome: a metagenomics analysis of microbial shift and gut antibiotic resistance in antibiotic treated mice. BMC Genomics 2020; 21:263. [PMID: 32228448 PMCID: PMC7106814 DOI: 10.1186/s12864-020-6665-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 03/10/2020] [Indexed: 02/08/2023] Open
Abstract
Background Emergence of antibiotic resistance is a global public health concern. The relationships between antibiotic use, the gut community composition, normal physiology and metabolism, and individual and public health are still being defined. Shifts in composition of bacteria, antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs) after antibiotic treatment are not well-understood. Methods This project used next-generation sequencing, custom-built metagenomics pipeline and differential abundance analysis to study the effect of antibiotic monotherapy on resistome and taxonomic composition in the gut of Balb/c mice infected with E. coli via transurethral catheterization to investigate the evolution and emergence of antibiotic resistance. Results There is a longitudinal decrease of gut microbiota diversity after antibiotic treatment. Various ARGs are enriched within the gut microbiota despite an overall reduction of the diversity and total amount of bacteria after antibiotic treatment. Sometimes treatment with a specific class of antibiotics selected for ARGs that resist antibiotics of a completely different class (e.g. treatment of ciprofloxacin or fosfomycin selected for cepA that resists ampicillin). Relative abundance of some MGEs increased substantially after antibiotic treatment (e.g. transposases in the ciprofloxacin group). Conclusions Antibiotic treatment caused a remarkable reduction in diversity of gut bacterial microbiota but enrichment of certain types of ARGs and MGEs. These results demonstrate an emergence of cross-resistance as well as a profound change in the gut resistome following oral treatment of antibiotics.
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Affiliation(s)
- Lei Xu
- U. S. Food and Drug Administration, Center for Drug Evaluation and Research, Office of Translational Science, Office of Clinical Pharmacology, Division of Applied Regulatory Science, HFD-910, White Oak Federal Research Center, 10903 New Hampshire Ave, Silver Spring, MD, 20993, USA
| | - Anil Surathu
- U. S. Food and Drug Administration, Center for Drug Evaluation and Research, Office of Translational Science, Office of Clinical Pharmacology, Division of Applied Regulatory Science, HFD-910, White Oak Federal Research Center, 10903 New Hampshire Ave, Silver Spring, MD, 20993, USA
| | - Isaac Raplee
- U. S. Food and Drug Administration, Center for Drug Evaluation and Research, Office of Translational Science, Office of Clinical Pharmacology, Division of Applied Regulatory Science, HFD-910, White Oak Federal Research Center, 10903 New Hampshire Ave, Silver Spring, MD, 20993, USA
| | - Ashok Chockalingam
- U. S. Food and Drug Administration, Center for Drug Evaluation and Research, Office of Translational Science, Office of Clinical Pharmacology, Division of Applied Regulatory Science, HFD-910, White Oak Federal Research Center, 10903 New Hampshire Ave, Silver Spring, MD, 20993, USA
| | - Sharron Stewart
- U. S. Food and Drug Administration, Center for Drug Evaluation and Research, Office of Translational Science, Office of Clinical Pharmacology, Division of Applied Regulatory Science, HFD-910, White Oak Federal Research Center, 10903 New Hampshire Ave, Silver Spring, MD, 20993, USA
| | - Lacey Walker
- U. S. Food and Drug Administration, Center for Drug Evaluation and Research, Office of Translational Science, Office of Clinical Pharmacology, Division of Applied Regulatory Science, HFD-910, White Oak Federal Research Center, 10903 New Hampshire Ave, Silver Spring, MD, 20993, USA
| | - Leonard Sacks
- U. S. Food and Drug Administration, Center for Drug Evaluation and Research, Office of Medical Policy, White Oak Federal Research Center, 10903 New Hampshire Ave, Silver Spring, MD, 20993, USA
| | - Vikram Patel
- U. S. Food and Drug Administration, Center for Drug Evaluation and Research, Office of Translational Science, Office of Clinical Pharmacology, Division of Applied Regulatory Science, HFD-910, White Oak Federal Research Center, 10903 New Hampshire Ave, Silver Spring, MD, 20993, USA
| | - Zhihua Li
- U. S. Food and Drug Administration, Center for Drug Evaluation and Research, Office of Translational Science, Office of Clinical Pharmacology, Division of Applied Regulatory Science, HFD-910, White Oak Federal Research Center, 10903 New Hampshire Ave, Silver Spring, MD, 20993, USA
| | - Rodney Rouse
- U. S. Food and Drug Administration, Center for Drug Evaluation and Research, Office of Translational Science, Office of Clinical Pharmacology, Division of Applied Regulatory Science, HFD-910, White Oak Federal Research Center, 10903 New Hampshire Ave, Silver Spring, MD, 20993, USA.
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Compounds targeting YadC of uropathogenic Escherichia coli and its host receptor annexin A2 decrease bacterial colonization in bladder. EBioMedicine 2019; 50:23-33. [PMID: 31757778 PMCID: PMC6921372 DOI: 10.1016/j.ebiom.2019.11.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 11/07/2019] [Accepted: 11/08/2019] [Indexed: 12/13/2022] Open
Abstract
Background Uropathogenic Escherichia coli (UPEC) is the leading cause of urinary tract infections (UTIs), and fimbrial tip adhesins, play important roles in UPEC colonization. Few fimbrial tip adhesins and their receptors on host cells, which have the potential to be the therapeutic targets, have been identified. Methods the UPEC wild-type strain CFT073, ΔyadC and the complemented strain were used to perform assays in vitro and in vivo. The effects of D-xylose targeting YadC on UPEC colonization were evaluated. A YadC receptor was identified by far-western blotting, LC-MS/MS and co-immunoprecipitation. The effects of compounds targeting the receptor on UPEC colonization were tested. Findings YadC was investigated for its mediation of UPEC adhesion and invasion to bladder epithelial cells in vitro; and its promotion of UPEC colonization in bladder in vivo. D-xylose, targeting YadC, showed prophylactic and therapeutic effects on UPEC colonization. Annexin A2 (ANXA2) was identified as a YadC receptor, involved in UPEC infection. ANXA2 inhibitors attenuated UPEC infections. The yadC gene was widely present in UPEC clinical isolates and phylogenetic analysis of yadC was performed. Interpretation YadC and its receptor ANXA2 play important roles in UPEC colonization in bladder, leading to novel treatment strategies targeting YadC or ANXA2 for acute UTIs. Fund This study was supported by grants from the National Natural Science Foundation of China (NSFC) Programs (31670071 and 31970133), the National Key Technologies R&D Program, Intergovernmental international innovation cooperation (2018YFE0102000), Tianjin Science and Technology Commissioner Project (18JCZDJC36000), the Science & Technology Development Fund of Tianjin Education Commission for Higher Education (2017ZD12). The Science Foundation of Tianjin Medical University (2016KY2M08).
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Anti-Adhesive Effect of ZnO Nanoparticles Against Uropathogenic Escherichia coli in Bladder Epithelial Cell Cultures and on fimH Gene Expression. Jundishapur J Microbiol 2019. [DOI: 10.5812/jjm.86885] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Sharaha U, Rodriguez-Diaz E, Sagi O, Riesenberg K, Salman A, Bigio IJ, Huleihel M. Fast and reliable determination of Escherichia coli susceptibility to antibiotics: Infrared microscopy in tandem with machine learning algorithms. JOURNAL OF BIOPHOTONICS 2019; 12:e201800478. [PMID: 30916881 DOI: 10.1002/jbio.201800478] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 03/12/2019] [Accepted: 03/25/2019] [Indexed: 06/09/2023]
Abstract
Antimicrobial drugs have an important role in controlling bacterial infectious diseases. However, the increasing resistance of bacteria to antibiotics has become a global health care problem. Rapid determination of antimicrobial susceptibility of clinical isolates is often crucial for the optimal antimicrobial therapy. The conventional methods used in medical centers for susceptibility testing are time-consuming (>2 days). Two bacterial culture steps are needed, the first is used to grow the bacteria from urine on agar plates to determine the species of the bacteria (~24 hours). The second culture is used to determine the susceptibility by growing colonies from the first culture for another 24 hours. Here, the main goal is to examine the potential of infrared microscopy combined with multivariate analysis, to reduce the time it takes to identify Escherichia coli susceptibility to antibiotics and to determine the optimum choice of antibiotic to which the bacteria will respond. E coli colonies of the first culture from patients with urinary tract infections (UTI) were examined for the bacterial susceptibility using Fourier-transform infrared (FTIR). Our results show that it is possible to determine the optimum choice of antibiotic with better than 89% sensitivity, in the time span of few minutes, following the first culture.
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Affiliation(s)
- Uraib Sharaha
- Department of Microbiology, Immunology and Genetic, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Eladio Rodriguez-Diaz
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts
- Section of Gastroenterology, VA Boston Healthcare System, Boston, Massachusetts
| | - Orli Sagi
- Microbiology Laboratory, Soroka University Medical Center, Beer-Sheva, Israel
| | - Klaris Riesenberg
- Infectious Diseases Department, Soroka University Medical Center, Beer-Sheva, Israel
| | - Ahmad Salman
- Department of Physics, SCE-Shamoon College of Engineering, Beer-Sheva, Israel
| | - Irving J Bigio
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts
- Department of Electrical & Computer Engineering, Boston University, Boston, Massachusetts
| | - Mahmoud Huleihel
- Department of Microbiology, Immunology and Genetic, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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Abrar S, Ain NU, Liaqat H, Hussain S, Rasheed F, Riaz S. Distribution of bla CTX - M , bla TEM , bla SHV and bla OXA genes in Extended-spectrum- β-lactamase-producing Clinical isolates: A three-year multi-center study from Lahore, Pakistan. Antimicrob Resist Infect Control 2019; 8:80. [PMID: 31139363 PMCID: PMC6530043 DOI: 10.1186/s13756-019-0536-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 05/09/2019] [Indexed: 01/05/2023] Open
Abstract
Background Frequency of extended-spectrum-β-lactamase-producing clinical isolates is increasing worldwide. This is a multi-center study which was aimed to check the frequency of third-generation cephalosporin resistance and distribution of the key genetic determinants of Extended-spectrum-β-lactamase-producing Clinical isolates in Pakistan. Methods A total of 2372 samples were processed in three tertiary care hospitals and one diagnostic research center of Lahore, Pakistan during Aug-2014 to Sep-2017. Analytical profile index (API 20-E) was used for biochemical characterization of isolates. Antibiotic susceptibility testing (AST) and third generation cephalosporin resistant (3GC-R) isolates were subjected to: double disc synergism test (DDST), combination disc test (CDST) and epsilometric test (E-test) for confirmation of ESBL-production. PCR amplification of isolates with plasmid and genomic DNA was performed. Amplicon sequences were checked for gene-variants and statistical analyses were performed to check the significance of data. Results A total of 497/995 (50%) isolates including Escherichia coli 65% (n = 321), Klebsiella spp. 25% (n = 124) and Pseudomonas. 5% (n = 24), Enterobacter spp. 4% (n = 20) and Acinetobacter spp. 2% (n = 8) were screened as third generation cephalosporin resistant (3GC-R). Urine 56% (n = 278) followed by pus 20% (n = 99) and wound swab 6% (n = 29) were frequent sources. Incidence of ESBL-producers detected by combination disc test was 79% (n = 392). PCR revealed blaCTX − M (76%) gene followed by blaOXA (52%), blaTEM (28%) and blaSHV (21%) were most prevalent among ESBL-producers detected by CDST. blaCTX − M − 1(65%), blaOXA (78%) and blaTEM (57%) genes were carried on plasmids. Amplicon sequencing revealed blaCTX − M − 15 (75%), blaOXA − 1 (49%) and blaTEM − 1B (34%) and 21 (n = 28) isolates carried three genes in them. Conclusion Prevalence of ESBL-producing isolates has increased 1.13 folds during study years. Isolates had high prevalence of ESBL-encoding blaCTXM − 15 gene and narrow spectrum blaOXA − 1 and blaTEM − 1B were also prevalent.
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Affiliation(s)
- Samyyia Abrar
- 1Department of Microbiology and Molecular genetics, University of the Punjab, Lahore, Pakistan
| | - Noor Ul Ain
- 1Department of Microbiology and Molecular genetics, University of the Punjab, Lahore, Pakistan
| | - Huma Liaqat
- 1Department of Microbiology and Molecular genetics, University of the Punjab, Lahore, Pakistan
| | - Shahida Hussain
- 1Department of Microbiology and Molecular genetics, University of the Punjab, Lahore, Pakistan
| | - Farhan Rasheed
- Allama Iqbal Medical College, Jinnah Hospital Lahore, Lahore, Pakistan
| | - Saba Riaz
- 1Department of Microbiology and Molecular genetics, University of the Punjab, Lahore, Pakistan.,Citilab and Research Center, Lahore, Pakistan
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Syukri M, Imran I, Harapan H, Sja’bani M, Astuti I, Soesatyo MHNE. Comparison of serum C3 complement levels between young women with recurrent urinary tract infection and healthy women. ALEXANDRIA JOURNAL OF MEDICINE 2019. [DOI: 10.1016/j.ajme.2014.04.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Affiliation(s)
- Maimun Syukri
- Department of Internal Medicine, School of Medicine, Syiah Kuala University, Banda Aceh, Indonesia
| | - Imran Imran
- Medical Research Unit, School of Medicine, Syiah Kuala University, Tropical Diseases Centre, School of Medicine, Syiah Kuala University, Banda Aceh, Indonesia
| | - Harapan Harapan
- Medical Research Unit, School of Medicine, Syiah Kuala University, Tropical Diseases Centre, School of Medicine, Syiah Kuala University, Banda Aceh, Indonesia
- Tropical Diseases Centre, School of Medicine, Syiah Kuala University, Banda Aceh, Indonesia
| | - Mochammad Sja’bani
- Department of Internal Medicine, Faculty of Medicine, Gadjah Mada University, Yogyakarta, Indonesia
| | - Indwiani Astuti
- Department of Pharmacology, Faculty of Medicine, Gadjah Mada University, Yogyakarta, Indonesia
| | - Marsetyawan HNE Soesatyo
- Department of Histology and Cell Biology, Faculty of Medicine, Gadjah Mada University, Yogyakarta, Indonesia
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DEHBANIPOUR R, KHANAHMAD H, SEDIGHI M, BIALVAEI AZAHEDI, FAGHRI J. High prevalence of fluoroquinolone-resistant Escherichia coli strains isolated from urine clinical samples. JOURNAL OF PREVENTIVE MEDICINE AND HYGIENE 2019; 60:E25-E30. [PMID: 31041407 PMCID: PMC6477561 DOI: 10.15167/2421-4248/jpmh2019.60.1.884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Accepted: 12/12/2018] [Indexed: 11/16/2022]
Abstract
Background Fluoroquinolone resistant Escherichia coli isolates have become an important challenge in healthcare settings in Iran. In this study, we have determined Fluoroquinolone resistant E. coli isolates (from both outpatients and inpatients) and evaluated mutations of gyrA and parC within the quinolone resistance-determining regions (QRDR) of these clinical isolates. Materials and methods Clinical isolates were recovered from the urine sample of patients with urinary tract infections admitted at Alzahra hospital, Iran, between September and February 2013. We assessed antimicrobial susceptibility of all isolates and determined mutations in QRDR of gyrA and parC genes from 13 fluoroquinolone-resistant isolates by DNA sequencing. Results A total of 135 E. coli strains were obtained from 135 patients (91 outpatients and 44 inpatients). The resistance rate of fluoroquinolones (Ciprofloxacin, Norfloxacin and Ofloxacin) among our strains was 45.2%. Two E. coli isolates were shown just a single mutation, but other isolates possessed 2-5 mutations in gyrA and parC genes. Mutations in the QRDR regions of gyrA were at positions Ser83 and Asp87 and parC at positions Ser80, Glu84, Gly78. Conclusions Ciprofloxacin is the most common antimicrobial agent used for treating urinary tract infections (UTIs) in healthcare settings in Iran. Accumulation of different substitutions in the QRDR regions of gyrA and parC confers high-level resistance of fluoroquinolones in clinical isolates.
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Affiliation(s)
- R. DEHBANIPOUR
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - H. KHANAHMAD
- Department of Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - M. SEDIGHI
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - A. ZAHEDI BIALVAEI
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - J. FAGHRI
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
- Jamshid Faghri, Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran - Tel/Fax +983137922421 - E-mail:
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Verderosa AD, Harris J, Dhouib R, Totsika M, Fairfull-Smith KE. Eradicating uropathogenic Escherichia coli biofilms with a ciprofloxacin-dinitroxide conjugate. MEDCHEMCOMM 2019; 10:699-711. [PMID: 31191860 DOI: 10.1039/c9md00062c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 02/19/2019] [Indexed: 11/21/2022]
Abstract
Urinary tract infections (UTIs) are amongst the most common and prevalent infectious diseases worldwide, with uropathogenic Escherichia coli (UPEC) reported as the main causative pathogen. Fluoroquinolone antibiotics are commonly used to treat UTIs but for infections involving UPEC biofilms, which are commonly associated with catheter use and recurrent episodes, ciprofloxacin is often ineffective. Here we report the development of a ciprofloxacin-dinitroxide (CDN) conjugate with potent UPEC biofilm-eradication activity. CDN 11 exhibited a 2-fold increase in potency over the parent antibiotic ciprofloxacin against UPEC biofilms. Moreover, CDN 11 resulted in almost complete UPEC biofilm cell eradication (99.7%) at concentrations as low as 12.5 μM, and significantly potentiated ciprofloxacin's biofilm-eradication activity against UPEC upon co-administration. The biofilm-eradication activity of CDN 11 highlights the potential of nitroxide functionalized antibiotics as a promising strategy for the treatment of biofilm-related UTIs.
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Affiliation(s)
- Anthony D Verderosa
- Queensland University of Technology , School of Chemistry, Physics and Mechanical Engineering , 2 George St , Brisbane , Queensland 4001 , Australia . .,Queensland University of Technology , School of Biomedical Sciences , Institute of Health and Biomedical Innovation , 300 Herston Rd , Brisbane , Queensland 4006 , Australia .
| | - Jessica Harris
- Queensland University of Technology , School of Chemistry, Physics and Mechanical Engineering , 2 George St , Brisbane , Queensland 4001 , Australia .
| | - Rabeb Dhouib
- Queensland University of Technology , School of Biomedical Sciences , Institute of Health and Biomedical Innovation , 300 Herston Rd , Brisbane , Queensland 4006 , Australia .
| | - Makrina Totsika
- Queensland University of Technology , School of Biomedical Sciences , Institute of Health and Biomedical Innovation , 300 Herston Rd , Brisbane , Queensland 4006 , Australia .
| | - Kathryn E Fairfull-Smith
- Queensland University of Technology , School of Chemistry, Physics and Mechanical Engineering , 2 George St , Brisbane , Queensland 4001 , Australia .
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Asadi Karam MR, Habibi M, Bouzari S. Urinary tract infection: Pathogenicity, antibiotic resistance and development of effective vaccines against Uropathogenic Escherichia coli. Mol Immunol 2019; 108:56-67. [PMID: 30784763 DOI: 10.1016/j.molimm.2019.02.007] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Revised: 02/02/2019] [Accepted: 02/12/2019] [Indexed: 12/13/2022]
Abstract
Urinary tract infections (UTIs) are recognized as one of the most common infectious diseases in the world that can be divided to different types. Uropathogenic Escherichia coli (UPEC) strains are the most prevalent causative agent of UTIs that applied different virulence factors such as fimbriae, capsule, iron scavenger receptors, flagella, toxins, and lipopolysaccharide for their pathogenicity in the urinary tract. Despite the high pathogenicity of UPEC strains, host utilizes different immune systems such as innate and adaptive immunity for eradication of them from the urinary tract. The routine therapy of UTIs is based on the use of antibiotics such as β-lactams, trimethoprim, nitrofurantoin and quinolones in many countries. Unfortunately, the widespread and misuse of these antibiotics resulted in the increasing rate of resistance to them in the societies. Increasing antibiotic resistance and their side effects on human body show the need to develop alternative strategies such as vaccine against UTIs. Developing a vaccine against UTI pathogens will have an important role in reduction the mortality rate as well as reducing economic costs. Different vaccines based on the whole cells (killed or live-attenuated vaccines) and antigens (subunits, toxins and conjugatedvaccines) have been evaluated against UTIs pathogens. Furthermore, other therapeutic strategies such as the use of probiotics and antimicrobial peptides are considered against UTIs. Despite the extensive efforts, limited success has been achieved and more studies are needed to reach an alternative of antibiotics for treatment of UTIs.
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Affiliation(s)
| | - Mehri Habibi
- Department of Molecular Biology, Pasteur Institute of Iran, Pasteur Ave., Tehran, 13164, Iran.
| | - Saeid Bouzari
- Department of Molecular Biology, Pasteur Institute of Iran, Pasteur Ave., Tehran, 13164, Iran.
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Prevalence of Multidrug Resistance and Extended-Spectrum β-Lactamase Carriage of Clinical Uropathogenic Escherichia coli Isolates in Riyadh, Saudi Arabia. Int J Microbiol 2018; 2018:3026851. [PMID: 30305814 PMCID: PMC6165594 DOI: 10.1155/2018/3026851] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Accepted: 08/17/2018] [Indexed: 12/30/2022] Open
Abstract
The prevalence of extended-spectrum β-lactamase-producing Escherichia coli (ESBL-producing E. coli) has recently increased worldwide. This study aims at determining the antimicrobial susceptibility patterns of a collection of clinical E. coli urine isolates and evaluating the ESBL carriage of these isolates at phenotypic and genotypic levels. A total of 100 E. coli urine isolates were collected at a tertiary healthcare centre in Riyadh from January 2018 to March 2018. Antimicrobial susceptibility testing was carried out for all isolates. ESBL production was characterized at phenotypic and genotypic levels using double-disc synergy test and polymerase chain reaction, respectively. Detection of different ESBL variants was performed using DNA sequencing. Of 100 E. coli isolates, 67 were associated with multidrug resistance (MDR) phenotype. All isolates showed variable resistance levels to all antibiotics used here expect to imipenem, where they were all imipenem-sensitive. 33 out of 100 E. coli isolates were positive for ESBLs by phenotypic and genotypic methods. Among all ESBL-positive E. coli isolates, the CTX-M was the most prevalent ESBL type (31/33 isolates; 93.94%). CTX-M-15 variant was detected in all isolates associated with CTX-M carriage. Multiple ESBL gene carriage was detected in 15/33 isolates (45.45%), where 11 (33.33%) isolates produced two different ESBL types while 4 isolates (12.12%) associated with carrying three different ESBL types. Our study documented the high antimicrobial resistance of ESBL-producing E. coli to many front-line antibiotics currently used to treat UTI patients, and this implies the need to continuously revise the local guidelines used for optimal empirical therapy for UTI patients. It also showed the high prevalence of ESBL carriage in E. coli urine isolates, with CTX-M-15 being the most predominant CTX-M variant.
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Yang H, Li Q, Wang C, Wang J, Lv J, Wang L, Zhang ZS, Yao Z, Wang Q. Cytotoxic Necrotizing Factor 1 Downregulates CD36 Transcription in Macrophages to Induce Inflammation During Acute Urinary Tract Infections. Front Immunol 2018; 9:1987. [PMID: 30233583 PMCID: PMC6128224 DOI: 10.3389/fimmu.2018.01987] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 08/13/2018] [Indexed: 11/13/2022] Open
Abstract
Urinary tract infections (UTIs) caused by uropathogenic Escherichia coli (UPEC) induce cystitis, pyelonephritis, and can cause kidney scarring and failure if inflammation is not under control. The detailed effects of cytotoxic necrotizing factor 1 (CNF1), the key UPEC toxin, on the pathogenicity of UPEC remain unclear. CD36 is an important scavenger receptor, responsible for pathogen and apoptotic cell clearance, and plays an essential role in host immune defense and homeostasis. Regulation of CD36 by bacterial toxins has not been reported. In this study, using a pyelonephritis mouse model, CNF1 was observed to contribute to increasing neutrophils and bacterial titers in infected bladder and kidney tissues, resulting in severe inflammation and tissue damage. CD36 expression in macrophages was found to be decreased by CNF1 in vitro and in vivo. We demonstrated that CNF1 attenuated CD36 transcription by decreasing expressions of its upstream transcription factors LXRβ and C/EBPα and their recruitment to the CD36 promotor. In addition, Cdc42 was found to be involved in CNF1-mediated downregulation of LXRβ. Our study investigated the pathogenesis of cnf1-carrying UPEC, which affected host innate immune defenses and homeostasis through regulation of CD36 in macrophages during acute UTIs.
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Affiliation(s)
- Huan Yang
- Key Laboratory of Immune Microenvironment and Disease of the Educational Ministry of China, Tianjin Key Laboratory of Cellular and Molecular Immunology, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Qianqian Li
- Key Laboratory of Immune Microenvironment and Disease of the Educational Ministry of China, Tianjin Key Laboratory of Cellular and Molecular Immunology, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Changying Wang
- Key Laboratory of Immune Microenvironment and Disease of the Educational Ministry of China, Tianjin Key Laboratory of Cellular and Molecular Immunology, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Jingyu Wang
- Key Laboratory of Immune Microenvironment and Disease of the Educational Ministry of China, Tianjin Key Laboratory of Cellular and Molecular Immunology, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Junqiang Lv
- Key Laboratory of Immune Microenvironment and Disease of the Educational Ministry of China, Tianjin Key Laboratory of Cellular and Molecular Immunology, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Lei Wang
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Drug Research, Collaborative Innovation Center for Biotherapy, College of Pharmacy, Nankai University, Tianjin, China
| | - Zhi-Song Zhang
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Drug Research, Collaborative Innovation Center for Biotherapy, College of Pharmacy, Nankai University, Tianjin, China
| | - Zhi Yao
- Key Laboratory of Immune Microenvironment and Disease of the Educational Ministry of China, Tianjin Key Laboratory of Cellular and Molecular Immunology, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China.,Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Medical University, Tianjin, China
| | - Quan Wang
- Key Laboratory of Immune Microenvironment and Disease of the Educational Ministry of China, Tianjin Key Laboratory of Cellular and Molecular Immunology, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
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Ramírez-Castillo FY, Moreno-Flores AC, Avelar-González FJ, Márquez-Díaz F, Harel J, Guerrero-Barrera AL. An evaluation of multidrug-resistant Escherichia coli isolates in urinary tract infections from Aguascalientes, Mexico: cross-sectional study. Ann Clin Microbiol Antimicrob 2018; 17:34. [PMID: 30041652 PMCID: PMC6057003 DOI: 10.1186/s12941-018-0286-5] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 07/14/2018] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Uropathogenic Escherichia coli (UPEC) are one of the main bacteria causing urinary tract infections (UTIs). The rates of UPEC with high resistance towards antibiotics and multidrug-resistant bacteria have increased dramatically in recent years and could difficult the treatment. METHODS The aim of the study was to determine multidrug-resistant bacteria, antibiotic resistance profile, virulence traits, and genetic background of 110 E. coli isolated from community (79 isolates) and hospital-acquired (31 isolates) urinary tract infections. The plasmid-mediated quinolone resistance genes presence was also investigated. A subset of 18 isolates with a quinolone-resistance phenotype was examined for common virulence genes encoded in diarrheagenic and extra-intestinal pathogenic E. coli by a specific E. coli microarray. RESULTS Female children were the group most affected by UTIs, which were mainly community-acquired. Resistance to trimethoprim-sulfamethoxazole, ampicillin, and ampicillin-sulbactam was most prevalent. A frequent occurrence of resistance toward ciprofloxacin (47.3%), levofloxacin (43.6%) and cephalosporins (27.6%) was observed. In addition, 63% of the strains were multidrug-resistant (MDR). Almost all the fluoroquinolone (FQ)-resistant strains showed MDR-phenotype. Isolates from male patients were associated to FQ-resistant and MDR-phenotype. Moreover, hospital-acquired infections were correlated to third generation cephalosporin and nitrofurantoin resistance and the presence of kpsMTII gene. Overall, fimH (71.8%) and fyuA (68.2%), had the highest prevalence as virulence genes among isolates. However, the profile of virulence genes displayed a great diversity, which included the presence of genes related to diarrheagenic E. coli. Out of 110 isolates, 25 isolates (22.7%) were positive to qnrA, 23 (20.9%) to qnrB, 7 (6.4%) to qnrS1, 7 (6.4%) to aac(6')lb-cr, 5 (4.5%) to qnrD, and 1 (0.9%) to qnrC genes. A total of 12.7% of the isolates harbored blaCTX-M genes, with blaCTX-M-15 being the most prevalent. CONCLUSIONS Urinary tract infection due to E. coli may be difficult to treat empirically due to high resistance to commonly used antibiotics. Continuous surveillance of multidrug resistant organisms and patterns of drug resistance are needed in order to prevent treatment failure and reduce selective pressure. These findings may help choosing more suitable treatments of UTI patients in this region of Mexico.
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Affiliation(s)
- Flor Y. Ramírez-Castillo
- Laboratorio de Biología Celular y Tisular, Departamento de Morfología, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Col. Cd. Universitaria, 20131 Aguascalientes, Mexico
| | - Adriana C. Moreno-Flores
- Laboratorio de Biología Celular y Tisular, Departamento de Morfología, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Col. Cd. Universitaria, 20131 Aguascalientes, Mexico
| | - Francisco J. Avelar-González
- Laboratorio de Ciencias Ambientales, Departamento de Fisiología y Farmacología, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Col. Cd. Universitaria, 20131 Aguascalientes, Mexico
| | - Francisco Márquez-Díaz
- Departamento de Infectología, Centenario Hospital Miguel Hidalgo, Galeana Sur 495, Obraje, 20000 Aguascalientes, Mexico
| | - Josée Harel
- Département de pathologie et microbiologie, Centre de Recherche en Infectologíe Porcine et Aviaire, Faculté de Médecine Vétérinaire, Université de Montréal, 3200, rue Sicott, Saint-Hyacinthe, Montreal, QC J2S 2M2 Canada
| | - Alma L. Guerrero-Barrera
- Laboratorio de Biología Celular y Tisular, Departamento de Morfología, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Col. Cd. Universitaria, 20131 Aguascalientes, Mexico
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Anigilaje EA. A Putative Role of Apolipoprotein L1 Polymorphism in Renal Parenchymal Scarring Following Febrile Urinary Tract Infection in Nigerian Under-Five Children: Proposal for a Case-Control Association Study. JMIR Res Protoc 2018; 7:e156. [PMID: 29903699 PMCID: PMC6024104 DOI: 10.2196/resprot.9514] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 03/23/2018] [Accepted: 04/10/2018] [Indexed: 01/13/2023] Open
Abstract
Background Although urinary tract infection (UTI) resolves with prompt treatment in a majority of children, some children, especially those aged less than 5 years, also develop renal parenchymal scarring (RPS). RPS causes high blood pressure that may lead to severe chronic kidney disease and end-stage renal disease (ESRD). Although the risk of UTI is higher in white children than in black children, it is unknown whether RPS is more common in white children than in black children as data are scarce in this regard. A common genetic predisposition to kidney disease in African Americans and the sub-Saharan African blacks is the possession of apolipoprotein L1 (APOL1). APOL1 risk variants regulate the production of APOL1. APOL1 circulates in the blood, and it is also found in the kidney tissue. While circulating, APOL1 kills the trypanosome parasites; an increased APOL1 in kidney tissues, under the right environmental conditions, can also result in the death of kidney tissue (vascular endothelium, the podocytes, proximal tubules, and arterial cells), which, ultimately, is replaced by fibrous tissue. APOL1 may influence the development of RPS, as evidence affirms that its expression is increased in kidney tissue following UTI caused by bacteria. Thus, UTI may be a putative environmental risk factor responsible for APOL1-induced kidney injury. Objective The aim of this proposal was to outline a study that seeks to determine if the possession of two copies of either G1 or G2 APOL1 variant increases the risk of having RPS, 6 months following a febrile UTI among Nigerian under-five children. Methods This case-control association study seeks to determine whether the risk of RPS from febrile UTI is conditional on having 2 APOL1 risk alleles (either G1 or G2). Cases will be children with a confirmed RPS following a febrile UTI. Controls will be age-, gender-, and ethnic-matched children with a febrile UTI but without RPS. Children with vesicoureteral reflux and other congenital anomalies of the urinary tract are to be excluded. Association between predictor variables (ethnicity, APOL1 G1 or G2, and others) and RPS will be tested at bivariate logistic regression analyses. Predictors that attained significance at a P value of ˂.05 will be considered for multiple logistic regressions. Likelihood-based tests will be used for hypothesis testing. Estimation will be done for the effect size for each of the APOL1 haplotypes using a generalized linear model. Results The study is expected to last for 3 years. Conclusions The study is contingent on having a platform for undergoing a research-based PhD program in any willing university in Europe or elsewhere. The findings of this study will be used to improve the care of African children who may develop RPS following febrile UTI. Registered Report Identifier RR1-10.2196/9514
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Affiliation(s)
- Emmanuel Ademola Anigilaje
- Nephrology Unit, Department of Paediatrics, College of Health Sciences, University of Abuja, Abuja, Nigeria
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Mowbray CA, Shams S, Chung G, Stanton A, Aldridge P, Suchenko A, Pickard RS, Ali ASM, Hall J. High molecular weight hyaluronic acid: a two-pronged protectant against infection of the urogenital tract? Clin Transl Immunology 2018; 7:e1021. [PMID: 29928502 PMCID: PMC5993165 DOI: 10.1002/cti2.1021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 05/08/2018] [Accepted: 05/09/2018] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVES Recurrent urinary tract infections are associated with uropathogenic Escherichia coli (UPEC) ascending and infecting the urinary tract. Antibiotics provide only symptomatic relief, not prevent recurrence. Clinical evidence suggests that intravesical glycosaminoglycan therapy, such as hyaluronic acid (HA), helps reduce UTI recurrence. This has been investigated here using in vitro systems modelling the urogenital tract tissues. METHODS RT4 bladder cells were preconditioned with high molecular weight HA (> 1500 kDa) at 2 mg mL-1 and challenged with UPEC to analyse barrier protection and bacterial adherence. Untreated and HA-preconditioned VK2 E6/E7 vaginal cells were challenged with E. coli flagellin (50 ng mL-1) to mimic bacterial challenge, and media analysed for lipocalin-2, human β-defensin 2 and interleukin-8 by ELISA. Experiments were repeated after siRNA knockdown of Toll-like receptors 2, 4 and 5, and CD44 to investigate signalling. RESULTS Microscopic analyses showed reduced bacterial adherence and urothelial disruption with HA, suggesting that HA functions as a barrier protecting the epithelium from bacterial infection. Cells treated with HA and flagellin simultaneously produced more of the host antimicrobial peptide LCN2 and pro-inflammatory IL-8 (P < 0.05) compared to the no HA/flagellin challenges. Increased gene expression of DEFB4 (P < 0.05), but not the hBD2 peptide, was observed in the HA/flagellin-challenged cells. CONCLUSION These data suggest that exogenous HA has potential to protect the urogenital epithelia from UPEC infection via a two-pronged approach that involves the physical enhancement of the epithelial barrier and augmentation of its innate immune response.
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Affiliation(s)
- Catherine A Mowbray
- Institute of Cell and Molecular BiosciencesMedical SchoolNewcastle UniversityNewcastle upon TyneUK
| | - Syema Shams
- Institute of Cell and Molecular BiosciencesMedical SchoolNewcastle UniversityNewcastle upon TyneUK
- Institute of Cellular MedicineMedical SchoolNewcastle UniversityNewcastle upon TyneUK
| | - Git Chung
- Institute of Cell and Molecular BiosciencesMedical SchoolNewcastle UniversityNewcastle upon TyneUK
| | - Anna Stanton
- Institute of Cell and Molecular BiosciencesMedical SchoolNewcastle UniversityNewcastle upon TyneUK
| | - Phillip Aldridge
- Institute of Cell and Molecular BiosciencesMedical SchoolNewcastle UniversityNewcastle upon TyneUK
| | - Andrejus Suchenko
- Institute of Cell and Molecular BiosciencesMedical SchoolNewcastle UniversityNewcastle upon TyneUK
| | - Robert S Pickard
- Institute of Cellular MedicineMedical SchoolNewcastle UniversityNewcastle upon TyneUK
- Department of UrologyNewcastle upon Tyne Hospitals NHS TrustNewcastle upon TyneUK
| | - Ased SM Ali
- Institute of Cellular MedicineMedical SchoolNewcastle UniversityNewcastle upon TyneUK
- Department of Urology and Regional Spinal Injuries UnitMid Yorkshire Hospitals NHS TrustNewcastle upon TyneUK
| | - Judith Hall
- Institute of Cell and Molecular BiosciencesMedical SchoolNewcastle UniversityNewcastle upon TyneUK
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Baby S, Kumar Karnaker V, Krishnaswamy Geetha R. Determination of Adhesion Encoding Genes of Uropathogenic Escherichia coli. ACTA ACUST UNITED AC 2018. [DOI: 10.34172/ajcmi.2018.04] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abrar S, Hussain S, Khan RA, Ul Ain N, Haider H, Riaz S. Prevalence of extended-spectrum-β-lactamase-producing Enterobacteriaceae: first systematic meta-analysis report from Pakistan. Antimicrob Resist Infect Control 2018; 7:26. [PMID: 29484173 PMCID: PMC5819302 DOI: 10.1186/s13756-018-0309-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Accepted: 01/26/2018] [Indexed: 12/18/2022] Open
Abstract
Background South-Asia is known as a hub for multidrug-resistant (MDR) bacteria. Unfortunately, proper surveillance and documentation of MDR pathogens is lacking in Pakistan. The alarming increase in the prevalence of extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae is a serious problem. From this perspective, we analysed published data regarding ESBL-producing Enterobacteriaceae in different regions of Pakistan. Methods A meta-analysis was performed to determine the prevalence of ESBL-producing Enterobacteriaceae in Pakistan. A Web-based search was conducted in electronic databases, including PubMed, Scopus and PakMedi Net (for non-indexed Pakistani journals). Articles published (in either indexed or non-indexed journals) between January 2002 and July 2016 were included in the study. Relevant data were extracted, and statistical analysis was performed using the Metaprop command of STATA version 14.1. Results A total of 68 studies were identified from the electronic data base search, and 55 of these studies met our inclusion criteria. Pakistan’s overall pooled proportion of ESBL-producers was 0.40 (95% CI: 0.34–0.47). The overall heterogeneity was significant (I2 = 99.75%, p < 0.001), and significant ES = 0 (Z = 18.41, p < 0.001) was found. OXA, SHV, TEM and CTX-M were the most commonly found gene variants for ESBLs in these studies. Conclusion The prevalence of ESBL-producing Enterobacteriaceae is high in Pakistan. Little is known about the annual frequency of ESBLs and their prevalence in different provinces of Pakistan. No data are available regarding ESBL frequency in Baluchistan. This underscores an urgent demand for regular surveillance to address this antimicrobial resistance problem. Surveillance to better understand the annual ESBL burden is crucial to improve national and regional guidelines.
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Affiliation(s)
- Samyyia Abrar
- 1Department of Microbiology and Molecular Genetics, University of the Punjab, Lahore, Pakistan
| | - Shahida Hussain
- 1Department of Microbiology and Molecular Genetics, University of the Punjab, Lahore, Pakistan
| | - Rehan Ahmad Khan
- 3College of Statistical and Actuarial Sciences, University of the Punjab, Lahore, Pakistan
| | - Noor Ul Ain
- 1Department of Microbiology and Molecular Genetics, University of the Punjab, Lahore, Pakistan
| | - Hayat Haider
- 1Department of Microbiology and Molecular Genetics, University of the Punjab, Lahore, Pakistan
| | - Saba Riaz
- 1Department of Microbiology and Molecular Genetics, University of the Punjab, Lahore, Pakistan.,Citilab and Research center, Lahore, Pakistan
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