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Misumi W, Magome A, Okuhama E, Uchimura E, Tamamura-Andoh Y, Watanabe Y, Kusumoto M. CTX-M-55-type ESBL-producing fluoroquinolone-resistant Escherichia coli sequence type 23 repeatedly caused avian colibacillosis in Kagoshima Prefecture, Japan. J Glob Antimicrob Resist 2023; 35:325-331. [PMID: 37918785 DOI: 10.1016/j.jgar.2023.10.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 10/03/2023] [Accepted: 10/21/2023] [Indexed: 11/04/2023] Open
Abstract
OBJECTIVES The production of expanded-spectrum beta-lactamases (ESBLs) and fluoroquinolone resistance in Enterobacteriaceae has become a global concern. The aim of this study was to investigate the spread of ESBL-producing and fluoroquinolone-resistant avian pathogenic Escherichia coli (APEC) in Kagoshima, a prefecture with the largest amount of poultry in Japan. METHODS The antimicrobial susceptibility and genetic characteristics of 228 APEC strains isolated from 57 farms in Kagoshima Prefecture, Japan, between 2005 and 2017 were analysed. Information about the companies with hatcheries connected to the farms was also collected, and the epidemiologic relatedness of APEC strains and the processes of adopting chicks were compared. RESULTS Seven CTX-M-type ESBL genes, blaCTX-M-1, blaCTX-M-2, blaCTX-M-14, blaCTX-M-15, blaCTX-M-25, blaCTX-M-55, and blaCTX-M-65, were found in 60 (26.3%) of the 228 APEC strains. The ciprofloxacin-resistant strains belonged to 10 different sequence types (ST10, ST23, ST93, ST155, ST156, ST350, ST359, ST602, ST648, and ST9479), and the two ST602 strains showed remarkably high ciprofloxacin resistance (MIC: 128 µg/mL) and had amino acid mutations in GyrA (S83L and D87N), ParC (S80I), and ParE (E460A). A CTX-M-55-type ESBL-producing fluoroquinolone-resistant Og78-ST23 strain was isolated multiple times over two years on a farm. Furthermore, epidemiologically closely related strains were isolated from different farms that used the same common hatcheries. CONCLUSIONS APEC is often transferred from hatcheries to farms via healthy chicks, and the prudent use of antimicrobials and careful monitoring of resistant strains on poultry farms and hatcheries are important in preventing the selection and spread of high-risk APEC strains such as CTX-M-55-type ESBL-producing Og78-ST23.
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Affiliation(s)
- Wakako Misumi
- Kagoshima Central Livestock Hygiene Service Center, Hioki, Kagoshima, Japan; Soo Livestock Hygiene Service Center, Shibushi, Kagoshima, Japan
| | - Asami Magome
- Kagoshima Central Livestock Hygiene Service Center, Hioki, Kagoshima, Japan
| | - Erina Okuhama
- Miyazaki Livestock Hygiene Service Center, Sadowara, Miyazaki, Japan
| | - Eriko Uchimura
- Kagoshima Central Livestock Hygiene Service Center, Hioki, Kagoshima, Japan; Kimotsuki Livestock Hygiene Service Center, Kanoya, Kagoshima, Japan
| | - Yukino Tamamura-Andoh
- Division of Zoonosis Research, National Institute of Animal Health, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, Japan
| | - Yoichiro Watanabe
- Kagoshima Central Livestock Hygiene Service Center, Hioki, Kagoshima, Japan
| | - Masahiro Kusumoto
- Division of Zoonosis Research, National Institute of Animal Health, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, Japan; Graduate School of Veterinary Science, Osaka Metropolitan University, Izumisano, Osaka, Japan.
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Christensen H, Nielsen C. Safety of the live Escherichia coli vaccine Poulvac® E. coli in layer parent stock in a field trial. Vet Microbiol 2019; 240:108537. [PMID: 31902490 DOI: 10.1016/j.vetmic.2019.108537] [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: 04/16/2019] [Revised: 10/31/2019] [Accepted: 11/28/2019] [Indexed: 10/25/2022]
Abstract
The safety of the live Escherichia coli vaccine Poulvac® E. coli was tested with a flock (10,000) of layer parents aged 30 weeks. Three and 7 days after vaccination, 60 whole unbroken eggs, the egg white and yolk of 60 eggs and 60 cloacal swabs were enriched in MacConkey broth. At both sampling times, 6 out of 60 whole eggs were found positive for coliform bacteria. None of the enriched samples of yolk + egg white were positive for coliform bacteria. Three and seven days after vaccination 44 and 37, respectively out of 60 swabs were positive for coliform bacteria in MacConkey broth. All coliform isolates collected from whole eggs and cloacal swabs were tested in parallel for growth on minimal agar and blood agar to identify the vaccine strain. Some isolates showed reduced growth on minimal agar compared to blood agar and they were tested further with a PCR for the aroA gene mutation and all were found with the wild type version of the gene. Only two isolates did not grow on minimal agar but grew on blood agar and they were tested both with PCR and PFGE. They also showed the wild type version of the aroA gene and their PFGE profile was different from the vaccine strain of Poulvac® E. coli. In conclusion, the Poulvac® E. coli vaccine strain of E. coli was not identified at the detection limit of one CFU on one egg or in the content of one egg or from a cloacal swab of one hen with at least 95 % probability on flock level. The use of the vaccine is safe for hens in lay with lack of survival of the vaccine strain and lack of negative effects on the hens including egg production.
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Affiliation(s)
- Henrik Christensen
- Department of Veterinary Animal Sciences, University of Copenhagen, Stigbøjlen 4, 1870, Frederiksberg C, Denmark.
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Schweizer C, Bischoff P, Bender J, Kola A, Gastmeier P, Hummel M, Klefisch FR, Schoenrath F, Frühauf A, Pfeifer Y. Plasmid-Mediated Transmission of KPC-2 Carbapenemase in Enterobacteriaceae in Critically Ill Patients. Front Microbiol 2019; 10:276. [PMID: 30837980 PMCID: PMC6390000 DOI: 10.3389/fmicb.2019.00276] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 02/01/2019] [Indexed: 11/25/2022] Open
Abstract
Carbapenem-resistant Enterobacteriaceae (CRE) cause health care-associated infections worldwide, and they are of severe concern due to limited treatment options. We report an outbreak of KPC-2-producing CRE that was caused by horizontal transmission of a promiscuous plasmid across different genera of bacteria and hospitals in Germany. Eleven isolates (8 Citrobacter freundii, 2 Klebsiella oxytoca, and 1 Escherichia coli) were obtained from seven critically ill patients during the six months of the outbreak in 2016. One patient developed a CRE infection while the other six patients were CRE-colonized. Three patients died in the course of the hospital stay. Six of the seven patients carried the same C. freundii clone; one K. oxytoca clone was found in two patients, and one patient carried E. coli and C. freundii. Molecular analysis confirmed the presence of a conjugative, blaKPC-2-carrying 70 kb-IncN plasmid in C. freundii and E. coli and an 80 kb-IncN plasmid in K. oxytoca. All transconjugants harbored either the 70 or 80 kb plasmid with blaKPC-2, embedded within transposon variant Tn4401g. Whole genome sequencing and downstream bioinformatics analyses of all plasmid sequences showed an almost perfect match when compared to a blaKPC-2-carrying plasmid of a large outbreak in another German hospital two years earlier. Differences in plasmid sizes and open reading frames point to the presence of inserted mobile genetic elements. There are few outbreak reports worldwide on the transmission of blaKPC-2-carrying plasmids across different bacterial genera. Our data suggest a regional and supraregional spread of blaKPC-2-carrying IncN-plasmids harboring the Tn4401g isoform in Germany.
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Affiliation(s)
- Christian Schweizer
- Department of Infection Control/Internal Medicine, Paulinenkrankenhaus, Berlin, Germany.,Department of Infection Control, German Heart Center Berlin, Berlin, Germany
| | - Peter Bischoff
- Institute of Hygiene and Environmental Medicine, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
| | - Jennifer Bender
- Robert Koch Institute, FG13 Nosocomial Pathogens and Antibiotic Resistances, Wernigerode, Germany
| | - Axel Kola
- Institute of Hygiene and Environmental Medicine, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
| | - Petra Gastmeier
- Institute of Hygiene and Environmental Medicine, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
| | - Manfred Hummel
- Department of Infection Control/Internal Medicine, Paulinenkrankenhaus, Berlin, Germany
| | - Frank-Rainer Klefisch
- Department of Infection Control/Internal Medicine, Paulinenkrankenhaus, Berlin, Germany
| | - Felix Schoenrath
- Department of Cardiothoracic and Vascular Surgery, German Heart Center Berlin, Berlin, Germany.,Partner Site Berlin, DZHK: German Centre for Cardiovascular Research, Berlin, Germany
| | - Andre Frühauf
- Robert Koch Institute, FG13 Nosocomial Pathogens and Antibiotic Resistances, Wernigerode, Germany
| | - Yvonne Pfeifer
- Robert Koch Institute, FG13 Nosocomial Pathogens and Antibiotic Resistances, Wernigerode, Germany
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Diversity of Multi-Drug Resistant Avian Pathogenic Escherichia coli (APEC) Causing Outbreaks of Colibacillosis in Broilers during 2012 in Spain. PLoS One 2015; 10:e0143191. [PMID: 26600205 PMCID: PMC4657910 DOI: 10.1371/journal.pone.0143191] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 11/01/2015] [Indexed: 12/03/2022] Open
Abstract
Avian pathogenic Escherichia coli (APEC) are the major cause of colibacillosis in poultry production. In this study, a total of 22 E. coli isolated from colibacillosis field cases and 10 avian faecal E. coli (AFEC) were analysed. All strains were characterised phenotypically by susceptibility testing and molecular typing methods such as pulsed-field gel electrophoresis (PFGE) and multi-locus sequence typing (MLST). The presence of 29 virulence genes associated to APEC and human extraintestinal pathogenic E. coli (ExPEC) was also evaluated. For cephalosporin resistant isolates, cephalosporin resistance genes, plasmid location and replicon typing was assessed. Avian isolates belonged to 26 O:H serotypes and 24 sequence types. Out of 22 APEC isolates, 91% contained the virulence genes predictors of APEC; iutA, hlyF, iss, iroN and ompT. Of all strains, 34% were considered ExPEC. PFGE analysis demonstrated a high degree of genetic polymorphism. All strains were multi-resistant, including those isolated from healthy animals. Eleven strains were resistant to cephalosporins; six contained blaCTX-M-14, two blaSHV-12, two blaCMY-2 and one blaSHV-2. Two strains harboured qnrA, and two qnrA together with aac(6’)-Ib-cr. Additionally, the emergent clone O25b:H4-B2-ST131 was isolated from a healthy animal which harboured blaCMY-2 and qnrS genes. Cephalosporin resistant genes were mainly associated to the presence of IncK replicons. This study demonstrates a very diverse population of multi-drug resistant E. coli containing a high number of virulent genes. The E. coli population among broilers is a reservoir of resistance and virulence-associated genes that could be transmitted into the community through the food chain. More epidemiological studies are necessary to identify clonal groups and resistance mechanisms with potential relevance to public health.
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Ferreira JC, Penha Filho RAC, Andrade LN, Berchieri A, Darini ALC. IncI1/ST113 and IncI1/ST114 conjugative plasmids carrying blaCTX-M-8 in Escherichia coli isolated from poultry in Brazil. Diagn Microbiol Infect Dis 2014; 80:304-6. [PMID: 25284375 DOI: 10.1016/j.diagmicrobio.2014.09.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Revised: 08/22/2014] [Accepted: 09/12/2014] [Indexed: 11/20/2022]
Abstract
Extended-spectrum beta-lactamase-producing Escherichia coli isolated from poultry in Brazil showed blaCTX-M-8 gene. IS10 was found upstream of blaCTX-M-8, harbored on plasmids IncI1, ST113/ST114 subtypes. Genomic relationship revealed a heterogeneous E. coli population. The gene blaCTX-M-8 is established in South America in food-producing animals, which represent risk of dissemination for other countries.
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Affiliation(s)
- Joseane Cristina Ferreira
- School of Pharmaceutical Sciences of Ribeirão Preto-University of São Paulo (USP), Ribeirão Preto, SP, 14040-903, Brazil
| | | | - Leonardo Neves Andrade
- School of Pharmaceutical Sciences of Ribeirão Preto-University of São Paulo (USP), Ribeirão Preto, SP, 14040-903, Brazil
| | - Angelo Berchieri
- School of Agricultural and Veterinary Sciences-São Paulo State University (UNESP), Jaboticabal, SP, 14884-900, Brazil
| | - Ana Lúcia Costa Darini
- School of Pharmaceutical Sciences of Ribeirão Preto-University of São Paulo (USP), Ribeirão Preto, SP, 14040-903, Brazil.
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Landman WJM, Buter GJ, Dijkman R, van Eck JHH. Molecular typing of avian pathogenicEscherichia colicolonies originating from outbreaks ofE. coliperitonitis syndrome in chicken flocks. Avian Pathol 2014; 43:345-56. [DOI: 10.1080/03079457.2014.935291] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Hiki M, Usui M, Akiyama T, Kawanishi M, Tsuyuki M, Imamura S, Sekiguchi H, Kojima A, Asai T. Phylogenetic grouping, epidemiological typing, analysis of virulence genes, and antimicrobial susceptibility of Escherichia coli isolated from healthy broilers in Japan. Ir Vet J 2014; 67:14. [PMID: 25061511 PMCID: PMC4110063 DOI: 10.1186/2046-0481-67-14] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 06/20/2014] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND The aim of our study was to investigate the possible etiology of avian colibacillosis by examining Escherichia coli isolates from fecal samples of healthy broilers. FINDINGS Seventy-eight E. coli isolates from fecal samples of healthy broilers in Japan were subjected to analysis of phylogenetic background, virulence-associated gene profiling, multi-locus sequence typing (MLST), and antimicrobial resistance profiling. Phylogenetic analysis demonstrated that 35 of the 78 isolates belonged to group A, 28 to group B1, one to group B2, and 14 to group D. Virulence-associated genes iutA, iss, cvaC, tsh, iroN, ompT, and hlyF were found in 23 isolates (29.5%), 16 isolates (20.5%), nine isolates (11.5%), five isolates (6.4%), 19 isolates (24.4%), 23 isolates (29.5%), and 22 isolates (28.2%) respectively. Although the genetic diversity of group D isolates was revealed by MLST, the group D isolates harbored iutA (10 isolates, 71.4%), iss (6 isolates, 42.9%), cvaC (5 isolates, 35.7%), tsh (3 isolates, 21.4%), hlyF (9 isolates, 64.3%), iroN (7 isolates, 50.0%), and ompT (9 isolates, 64.3%). CONCLUSIONS Our results indicated that E. coli isolates inhabiting the intestines of healthy broilers pose a potential risk of causing avian colibacillosis.
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Affiliation(s)
- Mototaka Hiki
- National Veterinary Assay Laboratory, Ministry of Agriculture, Forestry and Fisheries, 1-15-1 Tokura, Kokubunji, Tokyo 185-8511, Japan
| | - Masaru Usui
- Laboratory of Food Microbiology and Food Safety, Department of Health and Environmental Sciences, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
| | - Tetsuo Akiyama
- National Veterinary Assay Laboratory, Ministry of Agriculture, Forestry and Fisheries, 1-15-1 Tokura, Kokubunji, Tokyo 185-8511, Japan
| | - Michiko Kawanishi
- National Veterinary Assay Laboratory, Ministry of Agriculture, Forestry and Fisheries, 1-15-1 Tokura, Kokubunji, Tokyo 185-8511, Japan
| | - Mai Tsuyuki
- National Veterinary Assay Laboratory, Ministry of Agriculture, Forestry and Fisheries, 1-15-1 Tokura, Kokubunji, Tokyo 185-8511, Japan ; Food Safety and Consumer Affairs Bureau, Ministry of Agriculture, Forestry and Fisheries, 1-2-1 Kasumigaseki, Chiyoda-ku, Tokyo 100-8950, Japan
| | - Saiki Imamura
- National Veterinary Assay Laboratory, Ministry of Agriculture, Forestry and Fisheries, 1-15-1 Tokura, Kokubunji, Tokyo 185-8511, Japan ; Food Safety and Consumer Affairs Bureau, Ministry of Agriculture, Forestry and Fisheries, 1-2-1 Kasumigaseki, Chiyoda-ku, Tokyo 100-8950, Japan
| | - Hideto Sekiguchi
- Food Safety and Consumer Affairs Bureau, Ministry of Agriculture, Forestry and Fisheries, 1-2-1 Kasumigaseki, Chiyoda-ku, Tokyo 100-8950, Japan
| | - Akemi Kojima
- National Veterinary Assay Laboratory, Ministry of Agriculture, Forestry and Fisheries, 1-15-1 Tokura, Kokubunji, Tokyo 185-8511, Japan
| | - Tetsuo Asai
- The United Graduate School of Veterinary Sciences, Gifu University, Gifu-shi, Gifu, Japan
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A longitudinal study simultaneously exploring the carriage of APEC virulence associated genes and the molecular epidemiology of faecal and systemic E. coli in commercial broiler chickens. PLoS One 2013; 8:e67749. [PMID: 23825682 PMCID: PMC3692481 DOI: 10.1371/journal.pone.0067749] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 05/22/2013] [Indexed: 02/06/2023] Open
Abstract
Colibacillosis is an economically important syndromic disease of poultry caused by extra-intestinal avian pathogenic Escherichia coli (APEC) but the pathotype remains poorly defined. Combinations of virulence-associated genes (VAGs) have aided APEC identification. The intestinal microbiota is a potential APEC reservoir. Broiler chickens are selectively bred for fast, uniform growth. Here we simultaneously investigate intestinal E. coli VAG carriage in apparently healthy birds and characterise systemic E. coli from diseased broiler chickens from the same flocks. Four flocks were sampled longitudinally from chick placement until slaughter. Phylogrouping, macro-restriction pulsed-field gel electrophoresis (PFGE) and multi-locus sequence typing (MLST) were performed on an isolate subset from one flock to investigate the population structure of faecal and systemic E. coli. Early in production, VAG carriage among chick intestinal E. coli populations was diverse (average Simpson's D value = 0.73); 24.05% of intestinal E. coli (n = 160) from 1 day old chicks were carrying ≥5 VAGs. Generalised Linear models demonstrated VAG prevalence in potential APEC populations declined with age; 1% of E. coli carrying ≥5 VAGs at slaughter and demonstrated high strain diversity. A variety of VAG profiles and high strain diversity were observed among systemic E. coli. Thirty three new MLST sequence types were identified among 50 isolates and a new sequence type representing 22.2% (ST-2999) of the systemic population was found, differing from the pre-defined pathogenic ST-117 at a single locus. For the first time, this study takes a longitudinal approach to unravelling the APEC paradigm. Our findings, supported by other studies, highlight the difficulty in defining the APEC pathotype. Here we report a high genetic diversity among systemic E. coli between and within diseased broilers, harbouring diverse VAG profiles rather than single and/or highly related pathogenic clones suggesting host susceptibility in broilers plays an important role in APEC pathogenesis.
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Kwon HJ, Seong WJ, Kim JH. Molecular prophage typing of avian pathogenic Escherichia coli. Vet Microbiol 2013; 162:785-792. [DOI: 10.1016/j.vetmic.2012.10.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Revised: 10/03/2012] [Accepted: 10/06/2012] [Indexed: 11/28/2022]
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Nagano T, Kitahara R, Nagai S. An attenuated mutant of avian pathogenic Escherichia coli serovar O78: a possible live vaccine strain for prevention of avian colibacillosis. Microbiol Immunol 2012; 56:605-12. [DOI: 10.1111/j.1348-0421.2012.00482.x] [Citation(s) in RCA: 15] [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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Mora A, López C, Herrera A, Viso S, Mamani R, Dhabi G, Alonso MP, Blanco M, Blanco JE, Blanco J. Emerging avian pathogenic Escherichia coli strains belonging to clonal groups O111:H4-D-ST2085 and O111:H4-D-ST117 with high virulence-gene content and zoonotic potential. Vet Microbiol 2011; 156:347-52. [PMID: 22112854 DOI: 10.1016/j.vetmic.2011.10.033] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2011] [Revised: 10/22/2011] [Accepted: 10/26/2011] [Indexed: 10/15/2022]
Abstract
The present study characterizes, for the first time, two emerging avian pathogenic Escherichia coli (APEC) clonal groups of serogroup O111: O111:H4-D-ST117 and O111:H4-D-ST2085. The clonal group O111:H4-D-ST117 was already present in APEC strains isolated between 1991 and 2000, and was still present in strains isolated between 2004 and 2009, showing long time evolution according to the virulence-gene differences and macrorestriction profiles. Among ST117 strains, two virulence profiles could be distinguished: papG II-positive tsh-negative strains which satisfied criteria for extraintestinal pathogenic E. coli (ExPEC), and papG II-negative tsh-positive strains without ExPEC status. Interestingly, we have detected a human septicemic O111:H4-D-ST117 ExPEC strain isolated from a hemocultive in 2000 whose macrorestriction profile showed >85% similarity with four APEC strains of the study. The clonal group O111:H4-D-ST2085 was exclusively detected in 17 APEC strains isolated in 2008 and 2009, and showed short time evolution based on its homogeneity since all were nalidixic acid-resistant, all had ExPEC status, and most carried papG II and tsh genes. From the clinical point of view, O111:H4-D-ST2085 seems a successful clonal group that could be the result of the epidemiological evolution of O111:H4-D-ST117. Due to the increasing prevalence of both clonal groups among clinical APEC isolates, their high virulence-gene content, and zoonotic potential, we suggest them as possible candidates for the development of a future vaccine against avian colibacillosis.
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Affiliation(s)
- Azucena Mora
- Laboratorio de Referencia de E. coli (LREC), Departamento de Microbioloxía e Parasitoloxía, Facultade de Veterinaria, Universidade de Santiago de Compostela, Lugo, Spain.
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Woodford N, Turton JF, Livermore DM. Multiresistant Gram-negative bacteria: the role of high-risk clones in the dissemination of antibiotic resistance. FEMS Microbiol Rev 2011; 35:736-55. [PMID: 21303394 DOI: 10.1111/j.1574-6976.2011.00268.x] [Citation(s) in RCA: 630] [Impact Index Per Article: 48.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Multilocus sequence typing reveals that many bacterial species have a clonal structure and that some clones are widespread. This underlying phylogeny was not revealed by pulsed-field gel electrophoresis, a method better suited to short-term outbreak investigation. Some global clones are multiresistant and it is easy to assume that these have disseminated from single foci. Such conclusions need caution, however, unless there is a clear epidemiological trail, as with KPC carbapenemase-positive Klebsiella pneumoniae ST258 from Greece to northwest Europe. Elsewhere, established clones may have repeatedly and independently acquired resistance. Thus, the global ST131 Escherichia coli clone most often has CTX-M-15 extended-spectrum β-lactamase (ESBL), but also occurs without ESBLs and as a host of many other ESBL types. We explore this interaction of clone and resistance for E. coli, K. pneumoniae, Acinetobacter baumannii- a species where three global lineages dominate--and Pseudomonas aeruginosa, which shows clonal diversity, but includes the relatively 'tight' serotype O12/Burst Group 4 cluster that has proved adept at acquiring resistances--from PSE-1 to VIM-1 β-lactamases--for over 20 years. In summary, 'high-risk clones' play a major role in the spread of resistance, with the risk lying in their tenacity--deriving from poorly understood survival traits--and a flexible ability to accumulate and switch resistance, rather than to constant resistance batteries.
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Affiliation(s)
- Neil Woodford
- Microbiology Services-Colindale, Health Protection Agency, London, UK
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