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Maniam L, Vellasamy KM, Ong TA, Teh CSJ, Jabar KA, Mariappan V, Narayanan V, Vadivelu J, Pallath V. Genotypic characteristics of Uropathogenic Escherichia coli isolated from complicated urinary tract infection (cUTI) and asymptomatic bacteriuria-a relational analysis. PeerJ 2023; 11:e15305. [PMID: 37361034 PMCID: PMC10289082 DOI: 10.7717/peerj.15305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 04/06/2023] [Indexed: 06/28/2023] Open
Abstract
Background Uropathogenic Escherichia coli (UPEC) is the predominant agent causing various categories of complicated urinary tract infections (cUTI). Although existing data reveals that UPEC harboured numerous virulence determinants to aid its survival in the urinary tract, the reason behind the occurrence of differences in the clinical severity of uninary tract infections (UTI) demonstrated by the UPEC infection is poorly understood. Therefore, the present study aims to determine the distribution of virulence determinants and antimicrobial resistance among different phylogroups of UPEC isolated from various clinical categories of cUTI and asymptomatic bacteriuria (ASB) E. coli isolates. The study will also attempt a relational analysis of the genotypic characteristics of cUTI UPEC and ASB E. coli isolates. Methods A total of 141 UPEC isolates from cUTI and 160 ASB E. coli isolates were obtained from Universiti Malaya Medical Centre (UMMC). Phylogrouping and the occurrence of virulence genes were investigated using polymerase chain reaction (PCR). Antimicrobial susceptibility of the isolates to different classes of antibiotics was determined using the Kirby Bauer Disc Diffusion method. Results The cUTI isolates were distributed differentially among both Extraintestinal Pathogenic E. coli (ExPEC) and non-ExPEC phylogroups. Phylogroup B2 isolates were observed to possess the highest average aggregative virulence score (7.17), a probable representation of the capability to cause severe disease. Approximately 50% of the cUTI isolates tested in this study were multidrug resistant against common antibiotics used to treat UTI. Analysis of the occurrence of virulence genes among different cUTI categories demonstrated that UPEC isolates of pyelonephritis and urosepsis were highly virulent and had the highest average aggregative virulence scores of 7.80 and 6.89 respectively, compared to other clinical categories. Relational analysis of the occurrence of phylogroups and virulence determinants of UPEC and ASB E. coli isolates showed that 46.1% of UPEC and 34.3% of ASB E. coli from both categories were distributed in phylogroup B2 and had the highest average aggregative virulence score of 7.17 and 5.37, respectively. The data suggest that UPEC isolates which carry virulence genes from all four virulence genes groups studied (adhesions, iron uptake systems, toxins and capsule synthesis) and isolates from phylogroup B2 specifically could predispose to severe UTI involving the upper urinary tract. Therefore, specific analysis of the genotypic characteristics of UPEC could be further explored by incorporating the combination of virulence genes as a prognostic marker for predicting disease severity, in an attempt to propose a more evidence driven treatment decision-making for all UTI patients. This will go a long way in enhancing favourable therapeutic outcomes and reducing the antimicrobial resistance burden among UTI patients.
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Affiliation(s)
- Lalitha Maniam
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Kumutha Malar Vellasamy
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Teng Aik Ong
- Department of Surgery, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Cindy Shuan Ju Teh
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Kartini Abdul Jabar
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Vanitha Mariappan
- Centre of Toxicology and Health Risk Studies (CORE), Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Vallikkannu Narayanan
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Jamuna Vadivelu
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Vinod Pallath
- Medical Education Research and Development Unit (MERDU), Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
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Priyanka P, Meena PR, Raj D, Rana A, Dhanokar A, Duggirala KS, Singh AP. Urinary tract infection and sepsis causing potential of multidrug-resistant Extraintestinal pathogenic E. coli isolated from plant-origin foods. Int J Food Microbiol 2023; 386:110048. [PMID: 36502688 DOI: 10.1016/j.ijfoodmicro.2022.110048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 11/29/2022] [Accepted: 11/30/2022] [Indexed: 12/12/2022]
Abstract
The dissemination of Extraintestinal pathogenic Escherichia coli (ExPEC) in food is a critical concern for human health and food safety. The present study is the first to systematically examine the diverse plant-origin foods such as cucumber, carrot, tomato, radish, chilli, fenugreek, coriander, peppermint, spring onion, cabbage, and spinach for the presence of ExPEC or specific putative ExPEC pathotypes with an in-depth assessment of their phylogenetics, virulence, and drug resistance. A total of 77 (15.9 %) ExPEC isolates were recovered from 1780 samples of the diverse plant-origin foods of distinct environments. Specific putative ExPEC pathotypes such as Uropathogenic E. coli (UPEC, 23.3 %) and Septicemia-associated E. coli (SEPEC, 24.6 %) were identified among ExPEC isolates. The Clermont revisited new phylotyping method revealed the varied distribution (1-27 %) of specific putative ExPEC pathotypes in the different phylogenetic lineages such as A, D/E, B1, and Clade 1, etc. All putative ExPEC pathotypes possess multiple genes (4.3-92.8 %) or phenotypes (3.3-100 %) associated with their virulence. In-vitro antimicrobial susceptibility testing of all putative ExPEC pathotypes demonstrated the presence of 100 % multidrug resistance with moderate to high (52-100 %) resistance to drugs used as last-resorts (chloramphenicol, colistin) or frontline (nitrofurantoin, sulfamethoxazole, ampicillin, gentamicin) in ExPEC-associated infections in humans. Overall, the present findings significantly contribute to our better understanding of the presence of ExPEC in the non-clinical niche, such as plant-origin foods with a possible consequence on human health and food safety.
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Affiliation(s)
- Priyanka Priyanka
- Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Rajasthan, India
| | - Prem Raj Meena
- Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Rajasthan, India
| | - Dharma Raj
- Department of Biostatistics and Bioinformatics, ICMR-National Institute for Research in Environmental Health, Madhya Pradesh, India
| | - Anuj Rana
- Department of Microbiology, College of Basic Sciences & Humanities, Chaudhary Charan Singh Haryana Agricultural University, Haryana, India
| | - Akshay Dhanokar
- Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Rajasthan, India
| | - K Siddaardha Duggirala
- Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Rajasthan, India
| | - Arvind Pratap Singh
- Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Rajasthan, India.
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Yang C, Diarra MS, Attiq Rehman M, Li L, Yu H, Yin X, Aslam M, Carrillo CD, Yang C, Gong J. Virulence potential of antimicrobial-resistant extraintestinal pathogenic Escherichia coli from retail poultry meat in a Caenorhabditis elegans model. J Food Prot 2023; 86:100008. [PMID: 36916583 DOI: 10.1016/j.jfp.2022.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 11/01/2022] [Accepted: 11/04/2022] [Indexed: 12/23/2022]
Abstract
Healthy poultry can be a reservoir for extraintestinal pathogenic Escherichia coli (ExPEC), some of which could be multidrug resistant to antimicrobials. These ExPEC strains could contaminate the environment and/or food chain representing thus, food safety and human health risk. However, few studies have shown the virulence of poultry-source antimicrobial-resistant (AMR) ExPEC in humans. This study characterized AMR ExPEC and investigated the virulence potential of some of their isolates in a Caenorhabditis elegans infection model. A total of 46 E. coli isolates from poultry (chicken, n = 29; turkey, n = 12) retail meats and chicken feces (n = 4), or humans (n = 1) were sequenced and identified as ExPEC. Except eight, all remaining 38 ExPEC isolates were resistant to at least one antibiotic and carried corresponding antimicrobial resistance genes (ARGs). About 27 of the 46 ExPEC isolates were multidrug-resistant (≥3 antibiotic classes). Seven ExPEC isolates from chicken or turkey meats were of serotype O25:H4 and sequence type (ST) 131 which clustered with an isolate from a human urinary tract infection (UTI) case having the same serotype and ST. The C. elegans challenge model using eight of studied ExPEC isolates harboring various ARGs and virulence genes (VGs) showed that regardless of their ARG or VG numbers in tested poultry meat and feces, ExPEC significantly reduced the life span of the nematode (P < 0.05) similarly to a human UTI isolate. This study indicated the pathogenic potential of AMR ExPEC from retail poultry meat or feces, but more studies are warranted to establish their virulence in poultry and human. Furthermore, relationships between specific resistance profiles and/or VGs in these E. coli isolates for their pathogenicity deserve investigations.
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Affiliation(s)
- Chongwu Yang
- Guelph Research and Development Centre, Agriculture Agri-Food Canada (AAFC), Guelph, Ontario, Canada N1G 5C9; Department of Animal Science, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
| | - Moussa S Diarra
- Guelph Research and Development Centre, Agriculture Agri-Food Canada (AAFC), Guelph, Ontario, Canada N1G 5C9.
| | - Muhammad Attiq Rehman
- Guelph Research and Development Centre, Agriculture Agri-Food Canada (AAFC), Guelph, Ontario, Canada N1G 5C9
| | - Linyan Li
- Guelph Research and Development Centre, Agriculture Agri-Food Canada (AAFC), Guelph, Ontario, Canada N1G 5C9; State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Hai Yu
- Guelph Research and Development Centre, Agriculture Agri-Food Canada (AAFC), Guelph, Ontario, Canada N1G 5C9
| | - Xianhua Yin
- Guelph Research and Development Centre, Agriculture Agri-Food Canada (AAFC), Guelph, Ontario, Canada N1G 5C9
| | - Mueen Aslam
- Lacombe Research Centre, AAFC, Lacombe, Alberta, Canada T4L1W1
| | - Catherine D Carrillo
- Canadian Food Inspection Agency (CFIA), Ottawa Laboratory (Carling), Ottawa, Ontario, Canada K1Y 4K7
| | - Chengbo Yang
- Department of Animal Science, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
| | - Joshua Gong
- Guelph Research and Development Centre, Agriculture Agri-Food Canada (AAFC), Guelph, Ontario, Canada N1G 5C9.
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Ksiezarek M, Novais Â, Felga H, Mendes F, Escobar M, Peixe L. Phylogenomic analysis of a highly virulent Escherichia coli ST83 lineage with potential animal-human transmission. Microb Pathog 2021; 155:104920. [PMID: 33930418 DOI: 10.1016/j.micpath.2021.104920] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 02/01/2021] [Accepted: 03/22/2021] [Indexed: 11/22/2022]
Abstract
The presence of specific virulence features conditions severe forms of urinary tract disease, but the frequency and distribution of these highly virulent extraintestinal pathogenic Escherichia coli strains in animals and humans is unclear. We used whole genome sequencing, comparative genomics, histological and clinical data to characterize the genetic basis for pathogenesis and origin of E. coli Ec_151217, a strain (B2, ST83, O83:H5:K5) that caused an extremely aggressive upper urinary tract infection (UTI) in a cat. We show that Ec_151217 and 52% of other highly related ST83 genomes (O6 and O83) identified from different animal species and human infections carry two copies of the hemolysin A operon, though this duplication is infrequent (~1%) among closed ExPEC genomes from multiple sources. Our data enlarges the list of E. coli genetic backgrounds carrying hlyA operon duplication which is potentially involved in severity of UTI, and demonstrates that it seems to occur infrequently amongst ExPEC. Its identification in E. coli lineages (diverse ST83 serotypes) of potential animal-human transmission is of concern and anticipates the need to screen larger collections.
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Foster-Nyarko E, Alikhan NF, Ravi A, Thilliez G, Thomson NM, Baker D, Kay G, Cramer JD, O’Grady J, Antonio M, Pallen MJ. Genomic diversity of Escherichia coli isolates from non-human primates in the Gambia. Microb Genom 2020; 6:mgen000428. [PMID: 32924917 PMCID: PMC7643976 DOI: 10.1099/mgen.0.000428] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 08/13/2020] [Indexed: 01/27/2023] Open
Abstract
Increasing contact between humans and non-human primates provides an opportunity for the transfer of potential pathogens or antimicrobial resistance between host species. We have investigated genomic diversity and antimicrobial resistance in Escherichia coli isolates from four species of non-human primates in the Gambia: Papio papio (n=22), Chlorocebus sabaeus (n=14), Piliocolobus badius (n=6) and Erythrocebus patas (n=1). We performed Illumina whole-genome sequencing on 101 isolates from 43 stools, followed by nanopore long-read sequencing on 11 isolates. We identified 43 sequence types (STs) by the Achtman scheme (ten of which are novel), spanning five of the eight known phylogroups of E. coli. The majority of simian isolates belong to phylogroup B2 - characterized by strains that cause human extraintestinal infections - and encode factors associated with extraintestinal disease. A subset of the B2 strains (ST73, ST681 and ST127) carry the pks genomic island, which encodes colibactin, a genotoxin associated with colorectal cancer. We found little antimicrobial resistance and only one example of multi-drug resistance among the simian isolates. Hierarchical clustering showed that simian isolates from ST442 and ST349 are closely related to isolates recovered from human clinical cases (differences in 50 and 7 alleles, respectively), suggesting recent exchange between the two host species. Conversely, simian isolates from ST73, ST681 and ST127 were distinct from human isolates, while five simian isolates belong to unique core-genome ST complexes - indicating novel diversity specific to the primate niche. Our results are of planetary health importance, considering the increasing contact between humans and wild non-human primates.
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Affiliation(s)
- Ebenezer Foster-Nyarko
- Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk, UK
- Medical Research Council Unit the Gambia at the London School of Hygiene and Tropical Medicine, Atlantic Boulevard Road, Fajara, Gambia
| | | | - Anuradha Ravi
- Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk, UK
| | - Gaëtan Thilliez
- Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk, UK
| | | | - David Baker
- Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk, UK
| | - Gemma Kay
- Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk, UK
| | | | - Justin O’Grady
- Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk, UK
| | - Martin Antonio
- Medical Research Council Unit the Gambia at the London School of Hygiene and Tropical Medicine, Atlantic Boulevard Road, Fajara, Gambia
- Microbiology and Infection Unit, Warwick Medical School, University of Warwick, Coventry, UK
| | - Mark J. Pallen
- Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk, UK
- School of Veterinary Medicine, University of Surrey, Guildford, Surrey, UK
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Huang WC, Liao YJ, Hashimoto M, Chen KF, Chu C, Hsu PC, Wang S, Teng CH. cjrABC-senB hinders survival of extraintestinal pathogenic E. coli in the bloodstream through triggering complement-mediated killing. J Biomed Sci 2020; 27:86. [PMID: 32762693 PMCID: PMC7412671 DOI: 10.1186/s12929-020-00677-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Accepted: 07/28/2020] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Extraintestinal pathogenic E. coli (ExPEC) is a common gram-negative organism causing various infections, including urinary tract infections (UTIs), bacteremia, and neonatal meningitis. The cjrABC-senB gene cluster of E. coli contributes to ExPEC virulence in the mouse model of UTIs. Consistently, the distribution of cjrABC-senB is epidemiologically associated with human UTIs caused by E. coli. cjrABC-senB, which has previously been proposed to encode an iron uptake system, may facilitate ExPEC survival in the iron availability-restricted urinary tract. Given that the bloodstream is also an iron limited environment to invading bacteria, the pathogenic role of cjrABC-senB in ExPEC bacteremia, however, remains to be investigated. METHODS The ability of ExPEC RS218 strains with and without cjrABC-senB to survive in the mouse bloodstream and human serum was evaluated. Subsequently, the role of this gene cluster in the ExPEC interaction with the complement system was evaluated. Finally, the distribution of cjrABC-senB in human clinical E. coli isolates was determined by PCR. The frequency of cjrABC-senB in bacteremia isolates that were not associated with UTIs (non-UTI bacteremia isolates) was compared with that in UTI-associated isolates and fecal isolates. RESULTS Expression of cjrABC-senB attenuated the survival of RS218 in the mouse bloodstream and human serum. The cjrABC-senB-harboring strains triggered enhanced classical- and alternative-complement pathway activation and became more vulnerable to complement-mediated killing in serum. cjrA was identified as the major gene responsible for the attenuated serum survival. Expressing cjrABC-senB and cjrA increased bacterial susceptibility to detergent and induced periplasmic protein leakage, suggesting that the expression of these genes compromises the integrity of the outer membrane of ExPEC. In addition, the frequency of cjrABC-senB in non-UTI bacteremia isolates was significantly lower than that in UTI-associated isolates, while the frequencies in non-UTI bacteremia isolates and fecal isolates showed no significant difference. Consistently, this epidemiological investigation suggests that cjrABC-senB does not contribute to E. coli bacteremia in humans. CONCLUSION The contribution of cjrABC-senB to the pathogenesis of ExPEC is niche dependent and contradictory because the genes facilitate ExPEC UTIs but hinder bacteremia. The contradictory niche-dependent characteristic may benefit the development of novel strategies against E. coli-caused infections.
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Affiliation(s)
- Wen-Chun Huang
- Institute of Molecular Medicine, College of Medicine, National Cheng Kung University, 4th F, 367 Sheng Li Road, North District, Tainan City, Taiwan
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan City, Taiwan
| | - Yi-Jyun Liao
- Institute of Molecular Medicine, College of Medicine, National Cheng Kung University, 4th F, 367 Sheng Li Road, North District, Tainan City, Taiwan
| | - Masayuki Hashimoto
- Institute of Molecular Medicine, College of Medicine, National Cheng Kung University, 4th F, 367 Sheng Li Road, North District, Tainan City, Taiwan
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan City, Taiwan
- Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan City, Taiwan
| | - Kuan-Fu Chen
- Institute of Molecular Medicine, College of Medicine, National Cheng Kung University, 4th F, 367 Sheng Li Road, North District, Tainan City, Taiwan
| | - Chishih Chu
- Department of Microbiology, Immunology, and Biopharmaceuticals, National Chiayi University, Chiayi City, Taiwan
| | - Po-Chuen Hsu
- Institute of Molecular Medicine, College of Medicine, National Cheng Kung University, 4th F, 367 Sheng Li Road, North District, Tainan City, Taiwan
| | - Shuying Wang
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan City, Taiwan
- Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan City, Taiwan
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan City, Taiwan
- Department of Biotechnology and Bioindustry Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan City, Taiwan
| | - Ching-Hao Teng
- Institute of Molecular Medicine, College of Medicine, National Cheng Kung University, 4th F, 367 Sheng Li Road, North District, Tainan City, Taiwan.
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan City, Taiwan.
- Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan City, Taiwan.
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Papouskova A, Masarikova M, Valcek A, Senk D, Cejkova D, Jahodarova E, Cizek A. Genomic analysis of Escherichia coli strains isolated from diseased chicken in the Czech Republic. BMC Vet Res 2020; 16:189. [PMID: 32522212 PMCID: PMC7286222 DOI: 10.1186/s12917-020-02407-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 06/02/2020] [Indexed: 01/01/2023] Open
Abstract
Background Avian pathogenic Escherichia coli (APEC) can cause various extraintestinal infections in poultry, resulting in massive economic losses in poultry industry. In addition, some avian E. coli strains may have zoonotic potential, making poultry a possible source of infection for humans. Due to its extreme genetic diversity, this pathotype remains poorly defined. This study aimed to investigate the diversity of colibacillosis-associated E. coli isolates from Central European countries with a focus on the Czech Republic. Results Of 95 clinical isolates subjected to preliminary characterization, 32 were selected for whole-genome sequencing. A multi resistant phenotype was detected in a majority of the sequenced strains with the predominant resistance to β-lactams and quinolones being associated with TEM-type beta-lactamase genes and chromosomal gyrA mutations respectively. The phylogenetic analysis confirmed a great diversity of isolates, that were derived from nearly all phylogenetic groups, with predominace of B2, B1 and C phylogroups. Clusters of closely related isolates within ST23 (phylogroup C) and ST429 (phylogroup B2) indicated a possible local spread of these clones. Besides, the ST429 cluster carried blaCMY-2, − 59 genes for AmpC beta-lactamase and isolates of both clusters were generally well-equipped with virulence-associated genes, with considerable differences in distribution of certain virulence-associated genes between phylogenetically distant lineages. Other important and potentially zoonotic APEC STs were detected, incl. ST117, ST354 and ST95, showing several molecular features typical for human ExPEC. Conclusions The results support the concept of local spread of virulent APEC clones, as well as of zoonotic potential of specific poultry-associated lineages, and highlight the need to investigate the possible source of these pathogenic strains.
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Affiliation(s)
- Aneta Papouskova
- Department of Infectious Diseases and Microbiology, Faculty of Veterinary Medicine, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic. .,Central European Institute of Technology, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic.
| | - Martina Masarikova
- Department of Infectious Diseases and Microbiology, Faculty of Veterinary Medicine, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic.,Central European Institute of Technology, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
| | - Adam Valcek
- Central European Institute of Technology, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic.,Department of Biology and Wildlife Diseases, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
| | - David Senk
- Department of Infectious Diseases and Microbiology, Faculty of Veterinary Medicine, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
| | - Darina Cejkova
- Department of Immunology, Veterinary Research Institute, Brno, Czech Republic
| | - Eva Jahodarova
- Department of Immunology, Veterinary Research Institute, Brno, Czech Republic
| | - Alois Cizek
- Department of Infectious Diseases and Microbiology, Faculty of Veterinary Medicine, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic.,Central European Institute of Technology, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
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Nandanwar N, Janssen T, Kühl M, Ahmed N, Ewers C, Wieler LH. Extraintestinal pathogenic Escherichia coli (ExPEC) of human and avian origin belonging to sequence type complex 95 (STC95) portray indistinguishable virulence features. Int J Med Microbiol 2014; 304:835-42. [PMID: 25037925 DOI: 10.1016/j.ijmm.2014.06.009] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Extraintestinal pathogenic Escherichia coli (ExPEC) strains of certain genetic lineages are frequently implicated in a wide range of diseases in humans and birds. ExPEC strains belonging to the phylogenetic lineage/sequence type complex 95 (STC95) are one such prominent lineage that is commonly isolated from extraintestinal infections such as systemic disease in poultry and urinary tract infections (UTIs), neonatal meningitis and sepsis in humans. Several epidemiological studies have indicated that ST95 strains obtained from such infections may share similar virulence genes and other genomic features. However, data on their ability to establish infections in vivo as deduced from the manifestation of similar virulence phenotypes remain elusive. In the present study, 116 STC95 ExPEC isolates comprising 55 human and 61 avian strains, possessing similar virulence gene patterns, were characterized in vitro using adhesion, invasion, biofilm formation and serum bactericidal assays. Overall, STC95 strains from both groups, namely human and birds, were equally capable of adhering to and invading the two mammalian kidney cell lines. Similarly, these strains were able to form strong biofilms in M63 medium. Furthermore, they were equally resistant to the bactericidal activity of human and avian serum. Our cumulative data reinforce the understanding that ST95 strains from poultry present a potential zoonotic risk and therefore need a One Health strategy for a successfull intervention.
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