51
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Mobasseri G, Thong KL, Rajasekaram G, Teh CSJ. Molecular characterization of extended-spectrum β-lactamase-producing Klebsiella pneumoniae from a Malaysian hospital. Braz J Microbiol 2020; 51:189-195. [PMID: 31838661 PMCID: PMC7058728 DOI: 10.1007/s42770-019-00208-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 12/07/2019] [Indexed: 10/25/2022] Open
Abstract
Multidrug-resistant (MDR) and extended-spectrum β-lactamase (ESBL)-producing Klebsiella pneumoniae associated with nosocomial infections have caused serious problems in antibiotic management with limited therapeutic choices. This study aimed to determine the genotypic and phenotypic characteristics of K. pneumoniae strains isolated from a tertiary hospital in Malaysia. Ninety-seven clinical K. pneumoniae strains were analyzed for antimicrobial susceptibility, all of which were sensitive to amikacin and colistin (except one strain), while 31.9 % and 27.8 % were MDR and ESBL producers, respectively. PCR and DNA sequencing of the amplicons indicated that the majority of MDR strains (26/27) were positive for blaTEM, followed by blaSHV (24/27), blaCTX-M-1 group (23/27), blaCTX-M-9 group (2/27), and mcr-1 (1/27). Thirty-seven strains were hypervirulent and PCR detection of virulence genes showed 38.1 %, 22.7 %, and 16.5 % of the strains were positive for K1, wabG, and uge genes, respectively. Genotyping by pulsed-field gel electrophoresis (PFGE) and multilocus sequence typing (MLST) showed that these strains were genetically diverse and heterogeneous. Sequence types, ST23, ST22, and ST412 were the predominant genotypes. This is the first report of colistin-resistant K. pneumoniae among clinical strains associated with mcr-1 plasmid in Malaysia. The findings in this study have contributed to the effort in combating the increase in antimicrobial resistance by providing better understanding of genotypic characteristics and resistance mechanisms of the organisms.
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Affiliation(s)
- Golnaz Mobasseri
- Institute of Biological Science, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Kwai Lin Thong
- Institute of Biological Science, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Ganeswarie Rajasekaram
- Department of Pathology, Hospital Sultanah Aminah Johor Bahru, 80100, Johor Bahru, Malaysia
| | - Cindy Shuan Ju Teh
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
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52
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Tang B, Chang J, Zhang L, Liu L, Xia X, Hassan BH, Jia X, Yang H, Feng Y. Carriage of Distinct
mcr‐1
‐Harboring Plasmids by Unusual Serotypes of
Salmonella. ACTA ACUST UNITED AC 2020; 4:e1900219. [DOI: 10.1002/adbi.201900219] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 12/14/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Biao Tang
- Institute of Quality and Standard for Agro‐Products & State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro‐ProductsZhejiang Academy of Agricultural Sciences Hangzhou Zhejiang 310021 China
| | - Jiang Chang
- Institute of Quality and Standard for Agro‐Products & State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro‐ProductsZhejiang Academy of Agricultural Sciences Hangzhou Zhejiang 310021 China
- College of Food Science and EngineeringNorthwest Agriculture and Forestry University Yangling Shaanxi 712100 China
| | - Ling Zhang
- College of Food Science and EngineeringNorthwest Agriculture and Forestry University Yangling Shaanxi 712100 China
| | - Lizhang Liu
- Department of Pathogen Biology & Microbiology and Department of General Intensive Care Unit of the Second Affiliated HospitalZhejiang University School of Medicine Hangzhou Zhejiang 310058 China
| | - Xiaodong Xia
- College of Food Science and EngineeringNorthwest Agriculture and Forestry University Yangling Shaanxi 712100 China
| | - Bachar H. Hassan
- Stony Brook University 101 Nicolls Road Stony Brook NY 11794 USA
| | - Xu Jia
- Non‐Coding RNA and Drug Discovery Key Laboratory of Sichuan ProvinceChengdu Medical College Chengdu Sichuan 610500 China
| | - Hua Yang
- Institute of Quality and Standard for Agro‐Products & State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro‐ProductsZhejiang Academy of Agricultural Sciences Hangzhou Zhejiang 310021 China
| | - Youjun Feng
- Department of Pathogen Biology & Microbiology and Department of General Intensive Care Unit of the Second Affiliated HospitalZhejiang University School of Medicine Hangzhou Zhejiang 310058 China
- Non‐Coding RNA and Drug Discovery Key Laboratory of Sichuan ProvinceChengdu Medical College Chengdu Sichuan 610500 China
- College of Animal SciencesZhejiang University Hangzhou Zhejiang 310058 China
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53
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Bennani H, Mateus A, Mays N, Eastmure E, Stärk KDC, Häsler B. Overview of Evidence of Antimicrobial Use and Antimicrobial Resistance in the Food Chain. Antibiotics (Basel) 2020; 9:E49. [PMID: 32013023 PMCID: PMC7168130 DOI: 10.3390/antibiotics9020049] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 01/25/2020] [Accepted: 01/27/2020] [Indexed: 01/06/2023] Open
Abstract
Antimicrobial resistance (AMR) is a global health problem. Bacteria carrying resistance genes can be transmitted between humans, animals and the environment. There are concerns that the widespread use of antimicrobials in the food chain constitutes an important source of AMR in humans, but the extent of this transmission is not well understood. The aim of this review is to examine published evidence on the links between antimicrobial use (AMU) in the food chain and AMR in people and animals. The evidence showed a link between AMU in animals and the occurrence of resistance in these animals. However, evidence of the benefits of a reduction in AMU in animals on the prevalence of resistant bacteria in humans is scarce. The presence of resistant bacteria is documented in the human food supply chain, which presents a potential exposure route and risk to public health. Microbial genome sequencing has enabled the establishment of some links between the presence of resistant bacteria in humans and animals but, for some antimicrobials, no link could be established. Research and monitoring of AMU and AMR in an integrated manner is essential for a better understanding of the biology and the dynamics of antimicrobial resistance.
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Affiliation(s)
- Houda Bennani
- Veterinary Epidemiology, Economics and Public Health Group, Department of Pathobiology and Population Sciences, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire AL9 7TA, UK; (A.M.); (K.D.C.S.); (B.H.)
| | - Ana Mateus
- Veterinary Epidemiology, Economics and Public Health Group, Department of Pathobiology and Population Sciences, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire AL9 7TA, UK; (A.M.); (K.D.C.S.); (B.H.)
| | - Nicholas Mays
- Policy Innovation Research Unit, Department of Health Services Research & Policy, London School of Hygiene and Tropical Medicine, London WC1H 9SH, UK; (N.M.); (E.E.)
| | - Elizabeth Eastmure
- Policy Innovation Research Unit, Department of Health Services Research & Policy, London School of Hygiene and Tropical Medicine, London WC1H 9SH, UK; (N.M.); (E.E.)
| | - Katharina D. C. Stärk
- Veterinary Epidemiology, Economics and Public Health Group, Department of Pathobiology and Population Sciences, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire AL9 7TA, UK; (A.M.); (K.D.C.S.); (B.H.)
- SAFOSO AG, Waldeggstrasse 1, CH 3097 Liebefeld, Switzerland
| | - Barbara Häsler
- Veterinary Epidemiology, Economics and Public Health Group, Department of Pathobiology and Population Sciences, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire AL9 7TA, UK; (A.M.); (K.D.C.S.); (B.H.)
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54
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Sevilla E, Marín C, Delgado-Blas JF, González-Zorn B, Vega S, Kuijper E, Bolea R, Mainar-Jaime RC. Wild griffon vultures (Gyps fulvus) fed at supplementary feeding stations: Potential carriers of pig pathogens and pig-derived antimicrobial resistance? Transbound Emerg Dis 2020; 67:1295-1305. [PMID: 31901154 DOI: 10.1111/tbed.13470] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 12/19/2019] [Accepted: 12/27/2019] [Indexed: 12/18/2022]
Abstract
The carriage of two important pathogens of pigs, that is enterotoxigenic Escherichia coli (ETEC) and Clostridioides difficile, was investigated in 104 cloacal samples from wild griffon vultures (Gyps fulvus) fed on pig carcasses at supplementary feeding stations (SFS), along with their level of antimicrobial resistance (AMR). E. coli was isolated from 90 (86.5%) samples, but no ETEC was detected, likely because ETEC fimbriae confer the species specificity of the pathogen. Resistance to at least one antimicrobial agent was detected in 89.9% of E. coli isolates, with AMR levels being extremely high (>70%) for tetracycline and streptomycin and very high (>50%) for ampicillin and sulfamethoxazole-trimethoprim. Resistance to other critically important antimicrobials such as colistin and extended-spectrum cephalosporins was 2.2% and 1.1%, respectively, and was encoded by the mcr-1 and blaSHV-12 genes. Multidrug resistance was displayed by 80% of the resistant E. coli, and blaSHV-12 gene shared plasmid with other AMR genes. In general, resistance patterns in E. coli from vultures mirrored those found in pigs. Clostridioides difficile was detected in three samples (2.9%); two of them belonged to PCR ribotype 078 and one to PCR ribotype 126, both commonly found in pigs. All C. difficile isolates were characterized by a moderate-to-high level of resistance to fluoroquinolones and macrolides but susceptible to metronidazole or vancomycin, similar to what is usually found in C. difficile isolates from pigs. Thus, vultures may contribute somewhat to the environmental dissemination of some pig pathogens through their acquisition from pig carcasses and, more importantly, of AMR for antibiotics of critical importance for humans. However, the role of vultures would likely be much lesser than that of disposing pig carcasses at the SFS. The monitoring of AMR, and particularly of colistin-resistant and ESBL-producing E. coli, should be considered in pig farms used as sources of carcasses for SFS.
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Affiliation(s)
- Eloísa Sevilla
- Dpto. de Patología Animal, Facultad de Veterinaria, Instituto Agroalimentario de Aragón - IA2 - (Universidad de Zaragoza-CITA), Zaragoza, Spain
| | - Clara Marín
- Instituto de Ciencias Biomédicas, Universidad CEU Cardenal Herrera, CEU Universities, Valencia, Spain
| | - José F Delgado-Blas
- Dpto. de Sanidad Animal y Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Facultad de Veterinaria, Universidad Complutense de Madrid, Madrid, Spain
| | - Bruno González-Zorn
- Dpto. de Sanidad Animal y Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Facultad de Veterinaria, Universidad Complutense de Madrid, Madrid, Spain
| | - Santiago Vega
- Instituto de Ciencias Biomédicas, Universidad CEU Cardenal Herrera, CEU Universities, Valencia, Spain
| | - Ed Kuijper
- Dpt. of Medical Microbiology, Centre of Infectious Diseases, Leiden University Medical Centre, Leiden, The Netherlands
| | - Rosa Bolea
- Dpto. de Patología Animal, Facultad de Veterinaria, Instituto Agroalimentario de Aragón - IA2 - (Universidad de Zaragoza-CITA), Zaragoza, Spain
| | - Raúl C Mainar-Jaime
- Dpto. de Patología Animal, Facultad de Veterinaria, Instituto Agroalimentario de Aragón - IA2 - (Universidad de Zaragoza-CITA), Zaragoza, Spain
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55
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Kim S, Woo JH, Kim N, Kim MH, Kim SY, Son JH, Moon DC, Lim SK, Shin M, Lee JC. Characterization Of Chromosome-Mediated Colistin Resistance In Escherichia coli Isolates From Livestock In Korea. Infect Drug Resist 2019; 12:3291-3299. [PMID: 31695448 PMCID: PMC6815941 DOI: 10.2147/idr.s225383] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 09/25/2019] [Indexed: 02/06/2023] Open
Abstract
Purpose Colistin resistance in gram-negative bacteria from humans and livestock has been increasingly reported worldwide. The aim of this study was to investigate the underlying mechanisms of chromosome-mediated colistin resistance in Escherichia coli isolates from livestock in Korea. Materials and methods Thirty mcr-1-negative isolates were selected from a collection of colistin-resistant E. coli isolates collected from livestock in 2005 and 2015 in Korea. Amino acid alterations in PmrAB, PhoPQ, MgrB, and PmrD were investigated. Colistin-resistant derivatives were produced by serial passage of colistin-susceptible E. coli isolates in colistin-containing media. Results Thirty colistin-resistant mcr-negative E. coli isolates were classified into 26 sequence types. Twenty-two isolates carried diverse amino acid alterations in PmrB, PhoP, PhoQ, MgrB, and/or PmrD, whereas no mutation in any of these genes was found in the remaining eight isolates. Sixteen out of the 22 isolates shared a total of nine polymorphic positions that were found in colistin-susceptible E. coli strains. Colistin-resistant derivatives from two colistin-susceptible isolates showed the same genetic alterations that were observed in colistin-resistant clinical isolates. Conclusion Our results suggest that the mechanism underlying chromosome-mediated colistin resistance remain to be discovered in E. coli. Selective pressure of colistin in vitro induced the same genetic mutations associated with colistin resistance in vivo. Efforts to reduce colistin consumption in livestock should be redoubled, to prevent the occurrence of colistin-resistant E. coli strains.
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Affiliation(s)
- Shukho Kim
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Jung Hwa Woo
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Nayeong Kim
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Mi Hyun Kim
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Se Yeon Kim
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Joo Hee Son
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Dong Chan Moon
- Bacterial Disease Division, Animal and Plant Quarantine Agency, Gimcheon-si, Gyeongsangbuk-do, Republic of Korea
| | - Suk-Kyung Lim
- Bacterial Disease Division, Animal and Plant Quarantine Agency, Gimcheon-si, Gyeongsangbuk-do, Republic of Korea
| | - Minsang Shin
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Je Chul Lee
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
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56
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Antonelli P, Belluco S, Mancin M, Losasso C, Ricci A. Genes conferring resistance to critically important antimicrobials in Salmonella enterica isolated from animals and food: A systematic review of the literature, 2013–2017. Res Vet Sci 2019; 126:59-67. [DOI: 10.1016/j.rvsc.2019.08.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 08/12/2019] [Accepted: 08/12/2019] [Indexed: 01/03/2023]
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57
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Do KH, Park HE, Byun JW, Lee WK. Virulence and antimicrobial resistance profiles of Escherichia coli encoding mcr gene from diarrhoeic weaned piglets in Korea during 2007-2016. J Glob Antimicrob Resist 2019; 20:324-327. [PMID: 31542552 DOI: 10.1016/j.jgar.2019.09.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 09/11/2019] [Accepted: 09/13/2019] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVE This study aimed to analyse the presence of mcr genes and virulence genes in Escherichia coli (E. coli) isolates from diarrhoeic piglets between 2007-2016 in Korea. METHODS A total of 364 E. coli isolates were obtained from diarrhoeic weaned piglets between 2007-2016. Minimum inhibitory concentrationss were determined according to the Clinical and Laboratory Standards Institute (CLSI). DNA samples were tested for the presence of mcr-1, mcr-2 and mcr-3 genes. Furthermore, multiplex PCR was used to detect toxin, fimbrial and non-fimbrial adhesin genes. RESULTS It was found that 2.5% (nine of 364) of the isolates carried the mcr genes. Four isolates carried the mcr-1 gene and eight isolates had the mcr-3 gene. Three isolates carried both mcr-1 and mcr-3 genes; the mcr-2 gene was not found. All isolates carrying mcr genes were multidrug-resistant. F18 (77.8%, seven of nine) and Stx2e (44.4%, four of nine) were frequently detected in E. coli carrying the mcr gene. CONCLUSIONS In conclusion, it would appear that the most prevalent mcr gene of E. coli from diarrhoeic weaned piglets in Korea was mcr-3. It is believed that this is the first report of two plasmid-mediated colistin resistance genes - mcr-1 and mcr-3 - coexisting in the same isolates (0258, 0491, 0516) from piglets with diarrhoea in Korea. Those mcr-positive isolates showed multidrug resistance and the majority of those encoded Stx2e and F18. This indicates the risk of inefficient treatment for oedema disease in weaned piglets.
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Affiliation(s)
- Kyung-Hyo Do
- College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Ho-Eun Park
- College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Jae-Won Byun
- Animal and Plant Quarantine Agency, Gimcheon, 39660, Republic of Korea
| | - Wan-Kyu Lee
- College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Republic of Korea.
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58
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Yamaguchi T, Kawahara R, Harada K, Teruya S, Nakayama T, Motooka D, Nakamura S, Nguyen PD, Kumeda Y, Van Dang C, Hirata K, Yamamoto Y. The presence of colistin resistance gene mcr-1 and -3 in ESBL producing Escherichia coli isolated from food in Ho Chi Minh City, Vietnam. FEMS Microbiol Lett 2019; 365:4978414. [PMID: 29684127 DOI: 10.1093/femsle/fny100] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 04/17/2018] [Indexed: 12/26/2022] Open
Abstract
Colistin is indicated for the treatment of multidrug-resistant gram-negative bacterial infections. However, the spread of colistin-resistant bacteria harbouring an mcr gene has become a serious concern. This study investigated local foods in Vietnam for contamination with colistin-resistant bacteria. A total of 261 extended-spectrum β-lactamase (ESBL)- and AmpC-producing Escherichia coli isolates from 330 meat and seafood products were analysed for colistin susceptibility and the presence of mcr genes. Approximately, 24% (62/261) of ESBL- or AmpC-producing E. coli isolates showed colistin resistance; 97% (60/62) of colistin-resistant isolates harboured mcr-1, whereas 3% (2/62) harboured mcr-3. As the result of plasmid analysis of two strains, both plasmids harbouring mcr-3 revealed that plasmid replicon type was IncFII. Sequencing analysis indicated that an insertion sequence was present near mcr-3, suggesting that IncFII plasmids harbouring mcr-3 could be transferred to other bacterial species by horizontal transfer of the plasmid or transfer with some insertion sequence. In conclusion, ESBL-producing E. coli and AmpC-producing E. coli have acquired colistin resistance because 24% of such isolates show colistin resistance and 3% of the colistin-resistant strains harbour mcr-3. We reported the present of the mcr-3-carrying ESBL-producing E. coli isolated from pork in Vietnam.
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Affiliation(s)
- Takahiro Yamaguchi
- Osaka Institute of Public Health, 1-3-69 Nakamichi, Higashinari-ku, Osaka, Japan.,Graduate School of Pharmaceutical Sciences Osaka University, 1-6 Yamadaoka, Suita, Osaka, Japan
| | - Ryuji Kawahara
- Osaka Institute of Public Health, 1-3-69 Nakamichi, Higashinari-ku, Osaka, Japan
| | - Kazuo Harada
- Graduate School of Pharmaceutical Sciences Osaka University, 1-6 Yamadaoka, Suita, Osaka, Japan.,Osaka University Center for Global Initiatives, 1-1 Yamadaoka, Suita, Osaka, Japan
| | - Shihono Teruya
- Department of Molecular Bacteriology, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamadaoka, Suita, Osaka, Japan
| | - Tatsuya Nakayama
- National Institute of Health Science, 3-25-26 Tonomachi, Kanagawa-ku, Kanagawa, Japan
| | - Daisuke Motooka
- Genome Information Research Center, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamadaoka, Suita, Osaka, Japan
| | - Shota Nakamura
- Genome Information Research Center, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamadaoka, Suita, Osaka, Japan
| | - Phuc Do Nguyen
- Institute of Public Health, Ho Chi Minh City, 159 Hung Phu, District 8, Ward 8, Ho Chi Minh City, Vietnam
| | - Yuko Kumeda
- Research Center for Microorganism Control Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, Japan
| | - Chinh Van Dang
- Institute of Public Health, Ho Chi Minh City, 159 Hung Phu, District 8, Ward 8, Ho Chi Minh City, Vietnam
| | - Kazumasa Hirata
- Graduate School of Pharmaceutical Sciences Osaka University, 1-6 Yamadaoka, Suita, Osaka, Japan
| | - Yoshimasa Yamamoto
- Graduate School of Pharmaceutical Sciences Osaka University, 1-6 Yamadaoka, Suita, Osaka, Japan
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Futoma-Kołoch B, Bugla-Płoskońska G, Dudek B, Dorotkiewicz-Jach A, Drulis-Kawa Z, Gamian A. Outer Membrane Proteins of Salmonella as Potential Markers of Resistance to Serum, Antibiotics and Biocides. Curr Med Chem 2019; 26:1960-1978. [PMID: 30378478 DOI: 10.2174/0929867325666181031130851] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 07/13/2018] [Accepted: 08/14/2018] [Indexed: 01/05/2023]
Abstract
Salmonellosis continues to be a significant worldwide health problem. Despite rapid progress in identifying mechanisms of Salmonella virulence and resistance to chemicals, our knowledge of these mechanisms remains limited. Furthermore, it appears that the resistance to antibiotics can be amplified by ubiquitous usage of the disinfectants (biocides), both by industry and by ordinary households. Salmonella, as other Gram-negative bacteria possess outer membrane proteins (OMPs), which participate in maintaining cell integrity, adapting to environment, and interacting with infected host. Moreover, the OMPs may also contribute to resistance to antibacterials. This review summarizes the role of OMPs in Salmonella serum resistance, antibiotics resistance and cross-resistance to biocides. Although collected data do not allow to assign OMPs as markers of the Salmonella susceptibility to the above-mentioned factors, some of these proteins retain a dominant presence in certain types of resistance.
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Affiliation(s)
- Bożena Futoma-Kołoch
- Department of Microbiology, Institute of Genetics and Microbiology, University of Wrocław, Przybyszewskiego 63-77, 51-148 Wroclaw, Poland
| | - Gabriela Bugla-Płoskońska
- Department of Microbiology, Institute of Genetics and Microbiology, University of Wrocław, Przybyszewskiego 63-77, 51-148 Wroclaw, Poland
| | - Bartłomiej Dudek
- Department of Microbiology, Institute of Genetics and Microbiology, University of Wrocław, Przybyszewskiego 63-77, 51-148 Wroclaw, Poland
| | - Agata Dorotkiewicz-Jach
- Department of Pathogen Biology and Immunology, Institute of Genetics and Microbiology, University of Wrocław, Przybyszewskiego 63-77, 51-148 Wroclaw, Poland
| | - Zuzanna Drulis-Kawa
- Department of Pathogen Biology and Immunology, Institute of Genetics and Microbiology, University of Wrocław, Przybyszewskiego 63-77, 51-148 Wroclaw, Poland
| | - Andrzej Gamian
- Department of Immunology of Infectious Diseases, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Rudolfa Weigla 12, 53-114 Wroclaw, Poland
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60
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Abstract
Polymyxins are important lipopeptide antibiotics that serve as the last-line defense against multidrug-resistant (MDR) Gram-negative bacterial infections. Worryingly, the clinical utility of polymyxins is currently facing a serious threat with the global dissemination of mcr, plasmid-mediated polymyxin resistance. The first plasmid-mediated polymyxin resistance gene, termed as mcr-1 was identified in China in November 2015. Following its discovery, isolates carrying mcr, mainly mcr-1 and less commonly mcr-2 to -7, have been reported across Asia, Africa, Europe, North America, South America and Oceania. This review covers the epidemiological, microbiological and genomics aspects of this emerging threat to global human health. The mcr has been identified in various species of Gram-negative bacteria including Escherichia coli, Klebsiella pneumoniae, Klebsiella oxytoca, Salmonella enterica, Cronobacter sakazakii, Kluyvera ascorbata, Shigella sonnei, Citrobacter freundii, Citrobacter braakii, Raoultella ornithinolytica, Proteus mirabilis, Aeromonas, Moraxella and Enterobacter species from animal, meat, food product, environment and human sources. More alarmingly is the detection of mcr in extended-spectrum-β-lactamases- and carbapenemases-producing bacteria. The mcr can be carried by different plasmids, demonstrating the high diversity of mcr plasmid reservoirs. Our review analyses the current knowledge on the emergence of mcr-mediated polymyxin resistance.
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Affiliation(s)
- Sue C Nang
- a Department of Microbiology, Monash Biomedicine Discovery Institute , Monash University , Melbourne , Australia
| | - Jian Li
- a Department of Microbiology, Monash Biomedicine Discovery Institute , Monash University , Melbourne , Australia
| | - Tony Velkov
- b Department of Pharmacology and Therapeutics, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences , The University of Melbourne , Parkville , Australia
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61
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Davies R, Wales A. Antimicrobial Resistance on Farms: A Review Including Biosecurity and the Potential Role of Disinfectants in Resistance Selection. Compr Rev Food Sci Food Saf 2019; 18:753-774. [PMID: 33336931 DOI: 10.1111/1541-4337.12438] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/04/2019] [Accepted: 02/05/2019] [Indexed: 12/11/2022]
Abstract
Resistance to therapeutic antimicrobial agents is recognized as a growing problem for both human and veterinary medicine, and the need to address the issue in both of these linked domains is a current priority in public policy. Efforts to limit antimicrobial resistance (AMR) on farms have so far focused on control of the supply and use of antimicrobial drugs, plus husbandry measures to reduce infectious disease. In the United Kingdom and some other countries, substantial progress has been made recently against targets on agricultural antimicrobial drug use. However, evidence suggests that resistant pathogenic and commensal bacteria can persist and spread within and between premises despite declining or zero antimicrobial drug use. Reasons for this are likely complex and varied but may include: bacterial adaptations to ameliorate fitness costs associated with maintenance and replication of resistance genes and associated proteins, horizontal transmission of genetic resistance determinants between bacteria, physical transfer of bacteria via movement (of animals, workers, and equipment), ineffective cleaning and disinfection, and co-selection of resistance to certain drugs by use of other antimicrobials, heavy metals, or biocides. Areas of particular concern for public health include extended-spectrum cephalosporinases and fluoroquinolone resistance among Enterobacteriaceae, livestock-associated methicillin-resistant Staphylococcus aureus, and the emergence of transmissible colistin resistance. Aspects of biosecurity have repeatedly been identified as risk factors for the presence of AMR on farm premises, but there are large gaps in our understanding of the most important risk factors and the most effective interventions. The present review aims to summarize the present state of knowledge in this area, from a European perspective.
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Affiliation(s)
- Robert Davies
- Bacteriology and Food Safety Dept., Animal and Plant Health Agency (APHA - Weybridge), Woodham Lane, New Haw, Addlestone, KT15 3NB, UK
| | - Andrew Wales
- Pathology and Infectious Diseases Dept., School of Veterinary Medicine, Faculty of Health and Medical Sciences, Vet School Main Building, Daphne Jackson Rd., Univ. of Surrey, Guildford, GU2 7AL, UK
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62
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Jajere SM. A review of Salmonella enterica with particular focus on the pathogenicity and virulence factors, host specificity and antimicrobial resistance including multidrug resistance. Vet World 2019; 12:504-521. [PMID: 31190705 PMCID: PMC6515828 DOI: 10.14202/vetworld.2019.504-521] [Citation(s) in RCA: 290] [Impact Index Per Article: 58.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 02/11/2019] [Indexed: 12/03/2022] Open
Abstract
Salmonella genus represents the most common foodborne pathogens frequently isolated from food-producing animals that is responsible for zoonotic infections in humans and animal species including birds. Thus, Salmonella infections represent a major concern to public health, animals, and food industry worldwide. Salmonella enterica represents the most pathogenic specie and includes > 2600 serovars characterized thus far. Salmonella can be transmitted to humans along the farm-to-fork continuum, commonly through contaminated foods of animal origin, namely poultry and poultry-related products (eggs), pork, fish etc. Some Salmonella serovars are restricted to one specific host commonly referred to as "host-restricted" whereas others have broad host spectrum known as "host-adapted" serovars. For Salmonella to colonize its hosts through invading, attaching, and bypassing the host's intestinal defense mechanisms such as the gastric acid, many virulence markers and determinants have been demonstrated to play crucial role in its pathogenesis; and these factors included flagella, capsule, plasmids, adhesion systems, and type 3 secretion systems encoded on the Salmonella pathogenicity island (SPI)-1 and SPI-2, and other SPIs. The epidemiologically important non-typhoidal Salmonella (NTS) serovars linked with a high burden of foodborne Salmonella outbreaks in humans worldwide included Typhimurium, Enteritidis, Heidelberg, and Newport. The increased number of NTS cases reported through surveillance in recent years from the United States, Europe and low- and middle-income countries of the world suggested that the control programs targeted at reducing the contamination of food animals along the food chain have largely not been successful. Furthermore, the emergence of several clones of Salmonella resistant to multiple antimicrobials worldwide underscores a significant food safety hazard. In this review, we discussed on the historical background, nomenclature and taxonomy, morphological features, physical and biochemical characteristics of NTS with a particular focus on the pathogenicity and virulence factors, host specificity, transmission, and antimicrobial resistance including multidrug resistance and its surveillance.
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Affiliation(s)
- Saleh Mohammed Jajere
- Department of Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
- Department of Veterinary Public Health and Preventive Medicine, Faculty of Veterinary Medicine, University of Maiduguri, PMB 1069, Maiduguri, Borno State, Nigeria
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63
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Monte DF, Lincopan N, Fedorka-Cray PJ, Landgraf M. Current insights on high priority antibiotic-resistant Salmonella enterica in food and foodstuffs: a review. Curr Opin Food Sci 2019. [DOI: 10.1016/j.cofs.2019.03.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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64
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Card RM, La T, Burrough ER, Ellis RJ, Nunez-Garcia J, Thomson JR, Mahu M, Phillips ND, Hampson DJ, Rohde J, Tucker AW. Weakly haemolytic variants of Brachyspira hyodysenteriae newly emerged in Europe belong to a distinct subclade with unique genetic properties. Vet Res 2019; 50:21. [PMID: 30845993 PMCID: PMC6407217 DOI: 10.1186/s13567-019-0639-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 02/26/2019] [Indexed: 11/10/2022] Open
Abstract
Brachyspira (B.) hyodysenteriae is widespread globally, and can cause mucohaemorrhagic colitis (swine dysentery, SD) with severe economic impact in infected herds. Typical strains of B. hyodysenteriae are strongly haemolytic on blood agar, and the haemolytic activity is believed to contribute to virulence in vivo. However, recently there have been reports of atypical weakly haemolytic isolates of B. hyodysenteriae (whBh). In this study, 34 European whBh and 82 strongly haemolytic isolates were subjected to comparative genomic analysis. A phylogenetic tree constructed using core single nucleotide polymorphisms showed that the whBh formed a distinct sub-clade. All eight genes previously associated with haemolysis in B. hyodysenteriae were present in the whBh. No consistent patterns of amino acid substitutions for all whBh were found in these genes. In contrast, a genome region containing six coding sequences (CDSs) had consistent nucleotide sequence differences between strongly and whBh isolates. Two CDSs were predicted to encode ABC transporter proteins, and a TolC family protein, which may have a role in the export of haemolysins from B. hyodysenteriae. Another difference in this region was the presence of three CDSs in whBh that are pseudogenes in strongly haemolytic isolates. One of the intact CDSs from whBh encoded a predicted PadR-like transcriptional repressor that may play a role in repression of haemolysis functions. In summary, a sub-clade of whBh isolates has emerged in Europe, and several genomic differences, that potentially explain the weakly haemolytic phenotype, were identified. These markers may provide targets for discriminatory molecular tests needed in SD surveillance.
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Affiliation(s)
- Roderick M. Card
- Department of Bacteriology, Animal and Plant Health Agency, Addlestone, UK
| | - Tom La
- School of Veterinary and Life Sciences, Murdoch University, Perth, Australia
| | - Eric R. Burrough
- Veterinary Diagnostic Laboratory, Iowa State University, Ames, USA
| | - Richard J. Ellis
- Surveillance and Laboratory Services Department, Animal and Plant Health Agency, Addlestone, UK
| | - Javier Nunez-Garcia
- Surveillance and Laboratory Services Department, Animal and Plant Health Agency, Addlestone, UK
- Present Address: Genomics Medicine Ireland, Dublin, Ireland
| | | | - Maxime Mahu
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Nyree D. Phillips
- School of Veterinary and Life Sciences, Murdoch University, Perth, Australia
| | - David J. Hampson
- Department of Infectious Diseases and Public Health, City University of Hong Kong, Kowloon Tong, Hong Kong
| | - Judith Rohde
- Institute for Microbiology, University of Veterinary Medicine, Hannover, Germany
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65
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Velasova M, Smith RP, Lemma F, Horton RA, Duggett NA, Evans J, Tongue SC, Anjum MF, Randall LP. Detection of extended-spectrum β-lactam, AmpC and carbapenem resistance in Enterobacteriaceae in beef cattle in Great Britain in 2015. J Appl Microbiol 2019; 126:1081-1095. [PMID: 30693606 DOI: 10.1111/jam.14211] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 01/02/2019] [Accepted: 01/21/2019] [Indexed: 02/06/2023]
Abstract
AIMS This study investigated the occurrence and genetic diversity of Enterobacteriaceae with extended-spectrum β-lactamase (ESBL)-, AmpC- and carbapenemase-mediated resistance in British beef cattle, and related risk factors. METHODS AND RESULTS Faecal samples (n = 776) were obtained from farms in England and Wales (n = 20) and Scotland (n = 20) in 2015. Isolates from selective agars were identified by MALDI ToF mass spectrometry. Selected isolates were characterized by multiplex PCR (blaCTX -M, blaOXA , blaSHV and blaTEM genes), whole-genome sequencing (WGS), minimum inhibitory concentrations and pulsed-field gel electrophoresis. None of the faecal samples yielded carbapenem-resistant Escherichia coli. Ten (25%) of the farms tested positive for ESBL-producing CTX-M Enterobacteriaceae, 15 (37·5%) of the farms were positive for AmpC phenotype E. coli and none were positive for carbapenem-resistant E. coli. WGS showed a total of 30 different resistance genes associated with E. coli, Citrobacter and Serratia from ESBL agars, and colocation of resistance genes with blaCTX -M1 . Buying bulls and bringing in fattening cattle from another farm were identified as significant risk factors for positive samples harbouring CTX-M Enterobacteriaceae or AmpC phenotype E. coli respectively. CONCLUSIONS Beef cattle on a proportion of farms in GB carry ESBL-producing Enterobacteriaceae. Factors, such as operating as a closed herd, may have an important role in reducing introduction and transmission of resistant Enterobacteriaceae. The results indicate management factors may play an important role in impacting ESBL prevalence. In particular, further study would be valuable to understand the impact of maintaining a closed herd on reducing the introduction of resistant Enterobacteriaceae. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first study showing the presence of ESBL-producing Enterobacteriaceae in British beef cattle.
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Affiliation(s)
- M Velasova
- Animal and Plant Health Agency (Weybridge), Addlestone, UK
| | - R P Smith
- Animal and Plant Health Agency (Weybridge), Addlestone, UK
| | - F Lemma
- Animal and Plant Health Agency (Weybridge), Addlestone, UK
| | - R A Horton
- Animal and Plant Health Agency (Weybridge), Addlestone, UK
| | - N A Duggett
- Animal and Plant Health Agency (Weybridge), Addlestone, UK
| | - J Evans
- SRUC (Inverness Campus), Edinburgh, UK
| | | | - M F Anjum
- Animal and Plant Health Agency (Weybridge), Addlestone, UK
| | - L P Randall
- Animal and Plant Health Agency (Weybridge), Addlestone, UK
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66
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Plasmid-Mediated Colistin Resistance in Salmonella enterica: A Review. Microorganisms 2019; 7:microorganisms7020055. [PMID: 30791454 PMCID: PMC6406434 DOI: 10.3390/microorganisms7020055] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 02/13/2019] [Accepted: 02/15/2019] [Indexed: 11/16/2022] Open
Abstract
Colistin is widely used in food-animal production. Salmonella enterica is a zoonotic pathogen, which can pass from animal to human microbiota through the consumption of contaminated food, and cause disease, often severe, especially in young children, elderly and immunocompromised individuals. Recently, plasmid-mediated colistin resistance was recognised; mcr-like genes are being identified worldwide. Colistin is not an antibiotic used to treat Salmonella infections, but has been increasingly used as one of the last treatment options for carbapenem resistant Enterobacteria in human infections. The finding of mobilizable mcr-like genes became a global concern due to the possibility of horizontal transfer of the plasmid that often carry resistance determinants to beta-lactams and/or quinolones. An understanding of the origin and dissemination of mcr-like genes in zoonotic pathogens such as S. enterica will facilitate the management of colistin use and target interventions to prevent further spread. The main objective of this review was to collect epidemiological data about mobilized colistin resistance in S. enterica, describing the mcr variants, identified serovars, origin of the isolate, country and other resistance genes located in the same genetic platform.
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67
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Wang J, Ma ZB, Zeng ZL, Yang XW, Huang Y, Liu JH. The role of wildlife (wild birds) in the global transmission of antimicrobial resistance genes. Zool Res 2019; 38:55-80. [PMID: 28409502 PMCID: PMC5396029 DOI: 10.24272/j.issn.2095-8137.2017.003] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Antimicrobial resistance is an urgent global health challenge in human and veterinary medicine. Wild animals are not directly exposed to clinically relevant antibiotics; however, antibacterial resistance in wild animals has been increasingly reported worldwide in parallel to the situation in human and veterinary medicine. This underlies the complexity of bacterial resistance in wild animals and the possible interspecies transmission between humans, domestic animals, the environment, and wildlife. This review summarizes the current data on expanded-spectrum β-lactamase (ESBL), AmpC β-lactamase, carbapenemase, and colistin resistance genes in Enterobacteriaceae isolates of wildlife origin. The aim of this review is to better understand the important role of wild animals as reservoirs and vectors in the global dissemination of crucial clinical antibacterial resistance. In this regard, continued surveillance is urgently needed worldwide.
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Affiliation(s)
- Jing Wang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Zhen-Bao Ma
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Zhen-Ling Zeng
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Xue-Wen Yang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Ying Huang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Jian-Hua Liu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
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68
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Campos J, Mourão J, Peixe L, Antunes P. Non-typhoidal Salmonella in the Pig Production Chain: A Comprehensive Analysis of Its Impact on Human Health. Pathogens 2019; 8:E19. [PMID: 30700039 PMCID: PMC6470815 DOI: 10.3390/pathogens8010019] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 01/21/2019] [Accepted: 01/24/2019] [Indexed: 11/17/2022] Open
Abstract
Salmonellosis remains one of the most frequent foodborne zoonosis, constituting a worldwide major public health concern. The most frequent sources of human infections are food products of animal origin, being pork meat one of the most relevant. Currently, particular pig food production well-adapted and persistent Salmonella enterica serotypes (e.g., Salmonella Typhimurium, Salmonella 1,4,[5],12:i:-, Salmonella Derby and Salmonella Rissen) are frequently reported associated with human infections in diverse industrialized countries. The dissemination of those clinically-relevant Salmonella serotypes/clones has been related to the intensification of pig production chain and to an increase in the international trade of pigs and pork meat. Those changes that occurred over the years along the food chain may act as food chain drivers leading to new problems and challenges, compromising the successful control of Salmonella. Among those, the emergence of antibiotic resistance in non-typhoidal Salmonella associated with antimicrobials use in the pig production chain is of special concern for public health. The transmission of pig-related multidrug-resistant Salmonella serotypes, clones and/or genetic elements carrying clinically-relevant antibiotic resistance genes, frequently associated with metal tolerance genes, from pigs and pork meat to humans, has been reported and highlights the contribution of different drivers to the antibiotic resistance burden. Gathered data strengthen the need for global mandatory interventions and strategies for effective Salmonella control and surveillance across the pig production chain. The purpose of this review was to provide an overview of the role of pig and pork meat in human salmonellosis at a global scale, highlighting the main factors contributing to the persistence and dissemination of clinically-relevant pig-related Salmonella serotypes and clones.
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Affiliation(s)
- Joana Campos
- UCIBIO@REQUIMTE, Laboratório de Microbiologia, Faculdade de Farmácia, Universidade do Porto, Portugal; Rua de Jorge Viterbo Ferreira nº 228, 4050-313 Porto, Portugal.
| | - Joana Mourão
- UCIBIO@REQUIMTE, Laboratório de Microbiologia, Faculdade de Farmácia, Universidade do Porto, Portugal; Rua de Jorge Viterbo Ferreira nº 228, 4050-313 Porto, Portugal.
| | - Luísa Peixe
- UCIBIO@REQUIMTE, Laboratório de Microbiologia, Faculdade de Farmácia, Universidade do Porto, Portugal; Rua de Jorge Viterbo Ferreira nº 228, 4050-313 Porto, Portugal.
| | - Patrícia Antunes
- UCIBIO@REQUIMTE, Laboratório de Microbiologia, Faculdade de Farmácia, Universidade do Porto, Portugal; Rua de Jorge Viterbo Ferreira nº 228, 4050-313 Porto, Portugal.
- Faculdade de Ciências da Nutrição e Alimentação, Universidade do Porto, Portugal; Rua Dr. Roberto Frias, 4200 Porto, Portugal.
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69
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The emergence of colistin-resistant Klebsiella pneumoniae strains from swine in Malaysia. J Glob Antimicrob Resist 2019; 17:227-232. [PMID: 30611928 DOI: 10.1016/j.jgar.2018.12.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 12/20/2018] [Accepted: 12/21/2018] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVE Colistin is the last line of therapy for infections caused by multidrug-resistant Gram-negative bacteria. The objective of this study was to determine the phenotypic and genotypic characteristics of colistin-resistant Klebsiella pneumoniae (K. pneumoniae) isolated from swine samples in Malaysia. METHODS A total of 46 swine K. pneumoniae strains isolated from 2013-2015 in Malaysia were analysed for the production of extended-spectrum β-lactamases and carbapenemase. The resistance traits and genetic diversity of these strains were characterised by polymerase chain reaction, conjugation, plasmid analysis, and pulsed-field gel electrophoresis. RESULTS Nineteen of 46 strains were multidrug resistant while 13 were resistant to colistin. The majority of colistin-resistant strains harboured blaTEM gene (92.3%), followed by blaSHV (69.23%), blaCTXM-1 (38.46%), and blaMCR-1 (23.08%). All three colistin-resistant strains had transferable plasmids and the colistin resistance gene blaMCR-1. Genotyping by pulsed-field gel electrophoresis showed high genetic diversity among the K. pneumoniae and that the colistin-resistant K. pneumoniae strains were heterogenous. CONCLUSION It is believed that this is the first report of colistin-resistant K. pneumoniae among swine strains associated with mcr-1 plasmid in Malaysia. Due to the emergence of β-lactam, carbapenem and colistin resistance, the use of colistin in animal husbandry and agriculture should be avoided to prevent treatment failure.
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70
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Lu J, Quan J, Zhao D, Wang Y, Yu Y, Zhu J. Prevalence and molecular characteristics of mcr-1 gene in Salmonella typhimurium in a tertiary hospital of Zhejiang Province. Infect Drug Resist 2018; 12:105-110. [PMID: 30643438 PMCID: PMC6312689 DOI: 10.2147/idr.s190269] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Objectives mcr-1 gene has been widely reported in the world. This study aimed to analyze the prevalence and molecular characteristics of mcr-1 gene in Salmonella typhimurium from Quzhou People’s Hospital. Materials and methods A total of 62 S. typhimurium isolates were isolated and preserved in our laboratory from 2007 to 2016. PCR was used to screen plasmid-mediated colistin resistance gene, mcr-1. For mcr-1-positive isolates, susceptibilities to colistin and other antibiotics were assessed using broth microdilution or agar dilution methods. The genetic location of mcr-1 was determined by analysis of pulsed-field gel electrophoresis profiles of S1-digested genomic DNA and subsequent Southern blot hybridization. The multi-locus sequence type and other drug resistance genes found in the mcr-1-positive isolates were analyzed by performing whole genome sequencing. Genetic environment of mcr-1 gene was analyzed by RAST and Easyfig. Results A total of three S. typhimurium isolates were identified to be mcr-1 positive, with the prevalence rate of 4.8% (3/62). The minimum inhibitory concentration values of colistin for all these isolates were 8 µg/mL. The three mcr-1-positive isolates carried mcr-1 gene on two different types of plasmids having the sizes of ~54.7–78.2 kb and 310.1 kb, respectively. All the three isolates belonged to ST34 and carried various resistant genes. Conclusion Colistin-resistant, mcr-1-positive S. typhimurium isolates belonging to ST34 have been isolated from Quzhou People’s Hospital. Surveillance needs to be strengthened to identify colistin resistance and prevent the spread of drug-resistant bacteria in the hospital.
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Affiliation(s)
- Jun Lu
- Department of Laboratory, Quzhou People's Hospital, Quzhou, Zhejiang, China,
| | - Jingjing Quan
- Department of Infectious Diseases, College of Medicine, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Dongdong Zhao
- Department of Infectious Diseases, College of Medicine, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yanfei Wang
- Department of Infectious Diseases, College of Medicine, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Yunsong Yu
- Department of Infectious Diseases, College of Medicine, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Jin Zhu
- Department of Laboratory, Quzhou People's Hospital, Quzhou, Zhejiang, China,
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71
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Bardet L, Rolain JM. Development of New Tools to Detect Colistin-Resistance among Enterobacteriaceae Strains. THE CANADIAN JOURNAL OF INFECTIOUS DISEASES & MEDICAL MICROBIOLOGY = JOURNAL CANADIEN DES MALADIES INFECTIEUSES ET DE LA MICROBIOLOGIE MEDICALE 2018; 2018:3095249. [PMID: 30631384 PMCID: PMC6305056 DOI: 10.1155/2018/3095249] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 01/11/2018] [Indexed: 12/27/2022]
Abstract
The recent discovery of the plasmid-mediated mcr-1 gene conferring resistance to colistin is of clinical concern. The worldwide screening of this resistance mechanism among samples of different origins has highlighted the urgent need to improve the detection of colistin-resistant isolates in clinical microbiology laboratories. Currently, phenotypic methods used to detect colistin resistance are not necessarily suitable as the main characteristic of the mcr genes is the low level of resistance that they confer, close to the clinical breakpoint recommended jointly by the CLSI and EUCAST expert systems (S ≤ 2 mg/L and R > 2 mg/L). In this context, susceptibility testing recommendations for polymyxins have evolved and are becoming difficult to implement in routine laboratory work. The large number of mechanisms and genes involved in colistin resistance limits the access to rapid detection by molecular biology. It is therefore necessary to implement well-defined protocols using specific tools to detect all colistin-resistant bacteria. This review aims to summarize the current clinical microbiology diagnosis techniques and their ability to detect all colistin resistance mechanisms and describe new tools specifically developed to assess plasmid-mediated colistin resistance. Phenotyping, susceptibility testing, and genotyping methods are presented, including an update on recent studies related to the development of specific techniques.
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Affiliation(s)
- Lucie Bardet
- Aix-Marseille Université, IRD, AP-HM, MEPHI, IHU-Méditerranée Infection, Marseille, France
| | - Jean-Marc Rolain
- Aix-Marseille Université, IRD, AP-HM, MEPHI, IHU-Méditerranée Infection, Marseille, France
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72
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Figueiredo R, Card RM, Nunez-Garcia J, Mendonça N, da Silva GJ, Anjum MF. Multidrug-Resistant Salmonella enterica Isolated from Food Animal and Foodstuff May Also Be Less Susceptible to Heavy Metals. Foodborne Pathog Dis 2018; 16:166-172. [PMID: 30480469 DOI: 10.1089/fpd.2017.2418] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Salmonella enterica is a foodborne pathogen showing increasing multidrug resistance (MDR). We characterized the antimicrobial resistance (AMR) genotype using microarrays in a panel of 105 nontyphoidal S. enterica isolated from food animals and foodstuff. Nineteen isolates were chosen on the basis of their MDR and virulence for determination of heavy metal susceptibilities and screened by polymerase chain reaction for heavy metal resistance genes. Whole-genome sequencing (WGS) was performed on three isolates carrying clinically important AMR genes and the cdtB toxin gene to detect other heavy metal resistance mechanisms, and conjugation assays were performed to evaluate transfer of AMR/toxin genes with heavy metal resistance genes. AMR genotyping results showed isolates harbored between 1 and 12 mobile AMR genes, with 58% being classified as MDR. The tested subset of isolates showed reduced susceptibility to zinc (78%), copper (68%), silver (63%), arsenic (47%), and tellurite (26%); phenotypes that could be attributed to zitB (n = 32%), pcoA/pcoD (n = 32%), tcrB (n = 16%), arsB (n = 16%), silA/silE (n = 42%), and terF (n = 26%) genes. WGS confirmed the presence of other heavy metal resistance genes such as copA, cusA, and czcD. Isolates often harbored multiple heavy metal resistance genes. Two strains (Sal25 and Sal368) were able to conjugate with Escherichia coli J53 at a relatively high frequency (∼10-4 colony-forming units per recipient). Transformants selected in the presence of copper harbored either an IncHI2 (J53/Sal25 transconjugant) or IncF (J53/Sal368 transconjugant) plasmid with decreased susceptibilities to tellurite, zinc, copper, cobalt, arsenic, lead, mercury, and silver. blaCTX-M-1 and mcr-1 genes were also transferred to one transconjugant, and tet(M) and blaTEM-1 genes to the other. This work shows the presence of a diversity of AMR genes in this zoonotic pathogen, and suggests that heavy metals may contribute to selection of clinically important ones through the food chain, such as the plasmid-mediated colistin resistance gene mcr-1.
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Affiliation(s)
- Rui Figueiredo
- 1 Department of Microbiology, Faculty of Pharmacy, University of Coimbra , Coimbra, Portugal .,2 Center for Neuroscience and Cell Biology, Laboratory of Microbiology, University of Coimbra , Coimbra, Portugal .,3 Department of Bacteriology, Animal and Plant Health and Agency , Surrey, United Kingdom
| | - Roderick M Card
- 3 Department of Bacteriology, Animal and Plant Health and Agency , Surrey, United Kingdom
| | - Javier Nunez-Garcia
- 3 Department of Bacteriology, Animal and Plant Health and Agency , Surrey, United Kingdom
| | - Nuno Mendonça
- 1 Department of Microbiology, Faculty of Pharmacy, University of Coimbra , Coimbra, Portugal .,2 Center for Neuroscience and Cell Biology, Laboratory of Microbiology, University of Coimbra , Coimbra, Portugal
| | - Gabriela Jorge da Silva
- 1 Department of Microbiology, Faculty of Pharmacy, University of Coimbra , Coimbra, Portugal .,2 Center for Neuroscience and Cell Biology, Laboratory of Microbiology, University of Coimbra , Coimbra, Portugal
| | - Muna F Anjum
- 3 Department of Bacteriology, Animal and Plant Health and Agency , Surrey, United Kingdom
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73
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Duggett NA, Randall LP, Horton RA, Lemma F, Kirchner M, Nunez-Garcia J, Brena C, Williamson SM, Teale C, Anjum MF. Molecular epidemiology of isolates with multiple mcr plasmids from a pig farm in Great Britain: the effects of colistin withdrawal in the short and long term. J Antimicrob Chemother 2018; 73:3025-3033. [DOI: 10.1093/jac/dky292] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 06/25/2018] [Indexed: 12/22/2022] Open
Affiliation(s)
- Nicholas A Duggett
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone, Surrey, UK
| | - Luke P Randall
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone, Surrey, UK
| | - Robert A Horton
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone, Surrey, UK
| | - Fabrizio Lemma
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone, Surrey, UK
| | - Miranda Kirchner
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone, Surrey, UK
| | | | - Camilla Brena
- Animal and Plant Health Agency (Thirsk), West House, Station Road, Thirsk, North Yorkshire, UK
| | - Susanna M Williamson
- Animal and Plant Health Agency (Bury St Edmunds), Rougham Hill, Bury St Edmunds, Suffolk, UK
| | - Christopher Teale
- Animal and Plant Health Agency (Shrewsbury), Kendal Road, Shrewsbury, UK
| | - Muna F Anjum
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone, Surrey, UK
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Abstract
ABSTRACT
Non-typhoidal
Salmonella
is the most common foodborne bacterial pathogen in most countries. It is widely present in food animal species, and therefore blocking its transmission through the food supply is a prominent focus of food safety activities worldwide. Antibiotic resistance in non-typhoidal
Salmonella
arises in large part because of antibiotic use in animal husbandry. Tracking resistance in
Salmonella
is required to design targeted interventions to contain or diminish resistance and refine use practices in production. Many countries have established systems to monitor antibiotic resistance in
Salmonella
and other bacteria, the earliest ones appearing the Europe and the US. In this chapter, we compare recent
Salmonella
antibiotic susceptibility data from Europe and the US. In addition, we summarize the state of known resistance genes that have been identified in the genus. The advent of routine whole genome sequencing has made it possible to conduct genomic surveillance of resistance based on DNA sequences alone. This points to a new model of surveillance in the future that will provide more definitive information on the sources of resistant
Salmonella
, the specific types of resistance genes involved, and information on how resistance spreads.
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75
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Barilli E, Bacci C, StellaVilla Z, Merialdi G, D’Incau M, Brindani F, Vismarra A. Antimicrobial resistance, biofilm synthesis and virulence genes in Salmonella isolated from pigs bred on intensive farms. Ital J Food Saf 2018; 7:7223. [PMID: 30046559 PMCID: PMC6036996 DOI: 10.4081/ijfs.2018.7223] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 02/19/2018] [Accepted: 02/28/2018] [Indexed: 11/23/2022] Open
Abstract
Salmonella is the second cause of food-borne infection in humans in the USA and Europe. Pigs represent the second most important reservoir for the pathogen and the consumption of pork meat is a major risk factor for human salmonellosis. Here, we evaluated the virulence patterns of eleven Salmonella isolated from pigs (carcasses and faces) bred in intensive farms in the north of Italy. The two serotypes identified were S. Typhimurium and its monophasic variant 1,4,5,12:i:-. None of the isolates was an ESBL producer, as confirmed also by PCR. However, the presence of a multi-drug resistant pattern was evident, with all the isolates being resistant to at least to five antimicrobial agents belonging to various classes. Moreover, six out of eleven isolates showed important resistance profiles, such as resistance against colistin and ciprofloxacin, with nine to twelve recorded resistances. The isolates were negative for the biofilm synthesis test, while four different virulotypes were characterized. All the isolates showed the presence of invA, hilA, stn, ssrA, sipC. One sample also harbored ssaR and spvC genes. One strain was positive for all the virulence genes tested and was resistant to 12 antimicrobial agents. The present study contributes new data to the surveillance program for antibiotic resistance. Furthermore, the presence of eleven highly virulent isolates poses concern for human health in relation to their diffusion in the environment.
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Affiliation(s)
- Elena Barilli
- Department of Veterinary Sciences, University of Parma
| | | | | | - Giuseppe Merialdi
- Istituto Zooprofilattico Sperimentale della Lombardia, Emilia Romagna, Bologna
| | - Mario D’Incau
- Istituto Zooprofilattico Sperimentale della Lombardia, Emilia Romagna, Brescia, Italy
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76
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Abstract
The increase in bacteria harboring antimicrobial resistance (AMR) is a global problem because there is a paucity of antibiotics available to treat multidrug-resistant bacterial infections in humans and animals. Detection of AMR present in bacteria that may pose a threat to veterinary and public health is routinely performed using standardized phenotypic methods. Molecular methods are often used in addition to phenotypic methods but are set to replace them in many laboratories due to the greater speed and accuracy they provide in detecting the underlying genetic mechanism(s) for AMR. In this article we describe some of the common molecular methods currently used for detection of AMR genes. These include PCR, DNA microarray, whole-genome sequencing and metagenomics, and matrix-assisted laser desorption ionization-time of flight mass spectrometry. The strengths and weaknesses of these methods are discussed, especially in the context of implementing them for routine surveillance activities on a global scale for mitigating the risk posed by AMR worldwide. Based on current popularity and ease of use, PCR and single-isolate whole-genome sequencing seem irreplaceable.
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77
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Quiroga C, Nastro M, Di Conza J. Current scenario of plasmid-mediated colistin resistance in Latin America. Rev Argent Microbiol 2018; 51:93-100. [PMID: 29945744 DOI: 10.1016/j.ram.2018.05.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 04/15/2018] [Accepted: 05/09/2018] [Indexed: 11/30/2022] Open
Abstract
Colistin resistance can occur by chromosomal mutations and by acquisition of plasmid-carrying determinants, mainly mcr-1. In the recent years, we have observed the outburst of this resistance gene in our region. Due to the risk of the rapid dissemination of mcr-1, this finding has worried and alerted different actors from the health field and has become one of the most prolific topics. Our review compiles available reports of well-documented mcr-1-positive strains of Enterobacteriaceae, obtained from different samples in Argentina and other countries of Latin America. Furthermore, it addresses the association of mcr-1 with ESBL resistance markers and outlines the platforms involved in their dissemination.
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Affiliation(s)
- Cecilia Quiroga
- Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Tecnológicas, Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPAM), Facultad de Medicina, Paraguay 2155, C1121ABG, Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290 (1425), Ciudad Autónoma de Buenos Aires, Argentina
| | - Marcela Nastro
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Junín 954, C1113AAD, Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina
| | - José Di Conza
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Junín 954, C1113AAD, Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290 (1425), Ciudad Autónoma de Buenos Aires, Argentina.
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78
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Card RM, Stubberfield E, Rogers J, Nunez-Garcia J, Ellis RJ, AbuOun M, Strugnell B, Teale C, Williamson S, Anjum MF. Identification of a New Antimicrobial Resistance Gene Provides Fresh Insights Into Pleuromutilin Resistance in Brachyspira hyodysenteriae, Aetiological Agent of Swine Dysentery. Front Microbiol 2018; 9:1183. [PMID: 29971045 PMCID: PMC6018095 DOI: 10.3389/fmicb.2018.01183] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 05/15/2018] [Indexed: 11/30/2022] Open
Abstract
Brachyspira hyodysenteriae is the aetiological agent of swine dysentery, a globally distributed disease that causes profound economic loss, impedes the free trade and movement of animals, and has significant impact on pig health. Infection is generally treated with antibiotics of which pleuromutilins, such as tiamulin, are widely used for this purpose, but reports of resistance worldwide threaten continued effective control. In Brachyspira hyodysenteriae pleuromutilin resistance has been associated with mutations in chromosomal genes encoding ribosome-associated functions, however the dynamics of resistance acquisition are poorly understood, compromising stewardship efforts to preserve pleuromutilin effectiveness. In this study we undertook whole genome sequencing (WGS) and phenotypic susceptibility testing of 34 UK field isolates and 3 control strains to investigate pleuromutilin resistance in Brachyspira hyodysenteriae. Genome-wide association studies identified a new pleuromutilin resistance gene, tva(A) (tiamulin valnemulin antibiotic resistance), encoding a predicted ABC-F transporter. In vitro culture of isolates in the presence of inhibitory or sub-inhibitory concentrations of tiamulin showed that tva(A) confers reduced pleuromutilin susceptibility that does not lead to clinical resistance but facilitates the development of higher-level resistance via mutations in genes encoding ribosome-associated functions. Genome sequencing of antibiotic-exposed isolates identified both new and previously described mutations in chromosomal genes associated with reduced pleuromutilin susceptibility, including the 23S rRNA gene and rplC, which encodes the L3 ribosomal protein. Interesting three antibiotic-exposed isolates harboured mutations in fusA, encoding Elongation Factor G, a gene not previously associated with pleuromutilin resistance. A longitudinal molecular epidemiological examination of two episodes of swine dysentery at the same farm indicated that tva(A) contributed to development of tiamulin resistance in vivo in a manner consistent with that seen experimentally in vitro. The in vitro studies further showed that tva(A) broadened the mutant selection window and raised the mutant prevention concentration above reported in vivo antibiotic concentrations obtained when administered at certain doses. We show how the identification and characterisation of tva(A), a new marker for pleuromutilin resistance, provides evidence to inform treatment regimes and reduce the development of resistance to this class of highly important antimicrobial agents.
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Affiliation(s)
- Roderick M Card
- Department of Bacteriology, Animal and Plant Health Agency (APHA), Addlestone, United Kingdom
| | - Emma Stubberfield
- APHA Veterinary Investigation Centre Bury St. Edmunds, Bury St Edmunds, United Kingdom
| | - Jon Rogers
- APHA Veterinary Investigation Centre Bury St. Edmunds, Bury St Edmunds, United Kingdom
| | - Javier Nunez-Garcia
- Central Sequencing Unit, Animal and Plant Health Agency (APHA), Addlestone, United Kingdom
| | - Richard J Ellis
- Central Sequencing Unit, Animal and Plant Health Agency (APHA), Addlestone, United Kingdom
| | - Manal AbuOun
- Department of Bacteriology, Animal and Plant Health Agency (APHA), Addlestone, United Kingdom
| | - Ben Strugnell
- Farm Post Mortems Ltd., Bishop Auckland, United Kingdom
| | - Christopher Teale
- APHA Veterinary Investigation Centre Shrewsbury, Shrewsbury, United Kingdom
| | - Susanna Williamson
- APHA Veterinary Investigation Centre Bury St. Edmunds, Bury St Edmunds, United Kingdom
| | - Muna F Anjum
- Department of Bacteriology, Animal and Plant Health Agency (APHA), Addlestone, United Kingdom
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79
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AbuOun M, Stubberfield EJ, Duggett NA, Kirchner M, Dormer L, Nunez-Garcia J, Randall LP, Lemma F, Crook DW, Teale C, Smith RP, Anjum MF. mcr-1 and mcr-2 variant genes identified in Moraxella species isolated from pigs in Great Britain from 2014 to 2015. J Antimicrob Chemother 2018; 72:2745-2749. [PMID: 29091227 DOI: 10.1093/jac/dkx286] [Citation(s) in RCA: 175] [Impact Index Per Article: 29.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Accepted: 07/13/2017] [Indexed: 11/14/2022] Open
Abstract
Objectives To determine the occurrence of mcr-1 and mcr-2 genes in Gram-negative bacteria isolated from healthy pigs in Great Britain. Methods Gram-negative bacteria (n = 657) isolated from pigs between 2014 and 2015 were examined by WGS. Results Variants of mcr-1 and mcr-2 were identified in Moraxella spp. isolated from pooled caecal contents of healthy pigs at slaughter collected from six farms in Great Britain. Other bacteria, including Escherichia coli from the same farms, were not detected harbouring mcr-1 or mcr-2. A Moraxella porci-like isolate, MSG13-C03, harboured MCR-1.10 with 98.7% identity to MCR-1, and a Moraxella pluranimalium-like isolate, MSG47-C17, harboured an MCR-2.2 variant with 87.9% identity to MCR-2, from E. coli; the isolates had colistin MICs of 1-2 mg/L. No intact insertion elements were identified in either MSG13-C03 or MSG47-C17, although MSG13-C03 harboured the conserved nucleotides abutting the ISApl1 composite transposon found in E. coli plasmids and the intervening ∼2.6 kb fragment showed 97% identity. Six Moraxella osloensis isolates were positive for phosphoethanolamine transferase (EptA). They shared 62%-64.5% identity to MCR-1 and MCR-2, with colistin MICs from 2 to 4 mg/L. Phylogenetic analysis indicated that MCR and EptA have evolved from a common ancestor. In addition to mcr, the β-lactamase gene, blaBRO-1, was found in both isolates, whilst the tetracycline resistance gene, tetL, was found in MSG47-C17. Conclusions Our results add further evidence for the mobilization of the mcr-pap2 unit from Moraxella via composite transposons leading to its global dissemination. The presence of mcr-pap2 from recent Moraxella isolates indicates they may comprise a reservoir for mcr.
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Affiliation(s)
- Manal AbuOun
- Department of Bacteriology, Animal and Plant Health Agency, Weybridge, Surrey KT153NB, UK.,National Institute for Health Research Health Protection Research Unit, University of Oxford in partnership with PHE, Oxford, UK
| | - Emma J Stubberfield
- Department of Bacteriology, Animal and Plant Health Agency, Weybridge, Surrey KT153NB, UK
| | - Nick A Duggett
- Department of Bacteriology, Animal and Plant Health Agency, Weybridge, Surrey KT153NB, UK
| | - Miranda Kirchner
- Department of Bacteriology, Animal and Plant Health Agency, Weybridge, Surrey KT153NB, UK
| | - Luisa Dormer
- Department of Bacteriology, Animal and Plant Health Agency, Weybridge, Surrey KT153NB, UK
| | - Javier Nunez-Garcia
- Department of Bacteriology, Animal and Plant Health Agency, Weybridge, Surrey KT153NB, UK
| | - Luke P Randall
- Department of Bacteriology, Animal and Plant Health Agency, Weybridge, Surrey KT153NB, UK
| | - Fabrizio Lemma
- Department of Bacteriology, Animal and Plant Health Agency, Weybridge, Surrey KT153NB, UK
| | - Derrick W Crook
- National Institute for Health Research Health Protection Research Unit, University of Oxford in partnership with PHE, Oxford, UK.,Modernising Medical Microbiology Consortium, Nuffield Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Christopher Teale
- Department of Bacteriology, Animal and Plant Health Agency, Weybridge, Surrey KT153NB, UK
| | - Richard P Smith
- Department of Bacteriology, Animal and Plant Health Agency, Weybridge, Surrey KT153NB, UK
| | - Muna F Anjum
- Department of Bacteriology, Animal and Plant Health Agency, Weybridge, Surrey KT153NB, UK.,Modernising Medical Microbiology Consortium, Nuffield Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford, UK
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80
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Randall LP, Horton RA, Lemma F, Martelli F, Duggett NAD, Smith RP, Kirchner MJ, Ellis RJ, Rogers JP, Williamson SM, Simons RRL, Brena CM, Evans SJ, Anjum MF, Teale CJ. Longitudinal study on the occurrence in pigs of colistin-resistant Escherichia coli carrying mcr-1 following the cessation of use of colistin. J Appl Microbiol 2018; 125:596-608. [PMID: 29741287 DOI: 10.1111/jam.13907] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 04/09/2018] [Accepted: 04/12/2018] [Indexed: 11/27/2022]
Abstract
AIMS In 2015, colistin-resistant Escherichia coli and Salmonella with the mcr-1 gene were isolated from a pig farm in Great Britain. Pigs were subsequently monitored over a ~20-month period for the occurrence of mcr-1-mediated colistin resistance and the risk of mcr-1 E. coli entering the food chain was assessed. METHODS AND RESULTS Pig faeces and slurry were cultured for colistin-resistant E. coli and Salmonella, tested for the mcr-1 gene by PCR and selected isolates were further analysed. Seventy-eight per cent of faecal samples (n = 275) from pigs yielded mcr-1 E. coli after selective culture, but in positive samples only 0·2-1·3% of the total E. coli carried mcr-1. Twenty months after the initial sampling, faecal samples (n = 59) were negative for E. coli carrying mcr-1. CONCLUSIONS The risk to public health from porcine E. coli carrying mcr-1 was assessed as very low. Twenty months after cessation of colistin use, E. coli carrying mcr-1 was not detected in pig faeces on a farm where it was previously present. SIGNIFICANCE AND IMPACT OF THE STUDY The results suggest that cessation of colistin use may help over time to reduce or possibly eliminate mcr-1 E. coli on pig farms where it occurs.
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Affiliation(s)
- L P Randall
- Animal and Plant Health Agency (Weybridge), New Haw, Addlestone, Surrey, UK
| | - R A Horton
- Animal and Plant Health Agency (Weybridge), New Haw, Addlestone, Surrey, UK
| | - F Lemma
- Animal and Plant Health Agency (Weybridge), New Haw, Addlestone, Surrey, UK
| | - F Martelli
- Animal and Plant Health Agency (Weybridge), New Haw, Addlestone, Surrey, UK
| | - N A D Duggett
- Animal and Plant Health Agency (Weybridge), New Haw, Addlestone, Surrey, UK
| | - R P Smith
- Animal and Plant Health Agency (Weybridge), New Haw, Addlestone, Surrey, UK
| | - M J Kirchner
- Animal and Plant Health Agency (Weybridge), New Haw, Addlestone, Surrey, UK
| | - R J Ellis
- Animal and Plant Health Agency (Weybridge), New Haw, Addlestone, Surrey, UK
| | - J P Rogers
- Animal and Plant Health Agency (Bury St Edmunds), Bury St Edmunds, Suffolk, UK
| | - S M Williamson
- Animal and Plant Health Agency (Bury St Edmunds), Bury St Edmunds, Suffolk, UK
| | - R R L Simons
- Animal and Plant Health Agency (Weybridge), New Haw, Addlestone, Surrey, UK
| | - C M Brena
- Animal and Plant Health Agency (Thirsk), Thirsk, North Yorkshire, UK
| | - S J Evans
- Animal and Plant Health Agency (Weybridge), New Haw, Addlestone, Surrey, UK
| | - M F Anjum
- Animal and Plant Health Agency (Weybridge), New Haw, Addlestone, Surrey, UK
| | - C J Teale
- Animal and Plant Health Agency (Shrewsbury), Shrewsbury, UK
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81
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Li B, Chai Z, Yan X, Liu C, Situ B, Zhang Y, Pan W, Luo S, Liu J, Zheng L. An enzyme-free homogenous electrochemical assay for sensitive detection of the plasmid-mediated colistin resistance gene mcr-1. Anal Bioanal Chem 2018; 410:4885-4893. [DOI: 10.1007/s00216-018-1130-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 04/29/2018] [Accepted: 05/04/2018] [Indexed: 01/17/2023]
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82
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Wang W, Baloch Z, Zou M, Dong Y, Peng Z, Hu Y, Xu J, Yasmeen N, Li F, Fanning S. Complete Genomic Analysis of a Salmonella enterica Serovar Typhimurium Isolate Cultured From Ready-to-Eat Pork in China Carrying One Large Plasmid Containing mcr-1. Front Microbiol 2018; 9:616. [PMID: 29755416 PMCID: PMC5934421 DOI: 10.3389/fmicb.2018.00616] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 03/16/2018] [Indexed: 11/24/2022] Open
Abstract
One mcr-1-carrying ST34-type Salmonella Typhimurium WW012 was cultured from 3,200 ready-to-eat (RTE) pork samples in 2014 in China. Broth dilution method was applied to obtain the antimicrobial susceptibility of Salmonella Typhimurium WW012. Broth matting assays were carried out to detect transferability of this phenotype and whole-genome sequencing was performed to analyze its genomic characteristic. Thirty out of 3,200 RTE samples were positive for Salmonella and the three most frequent serotypes were identified as S. Derby (n = 8), S. Typhimurium (n = 6), and S. Enteritidis (n = 6). One S. Typhimurium isolate (S. Typhimurium WW012) cultured from RTE prepared pork was found to contain the mcr-1 gene. S. Typhimurium WW012 expressed a level of high resistance to seven different antimicrobial compounds in addition to colistin (MIC = 8 mg/L). A single plasmid, pWW012 (151,609-bp) was identified and found to be of an IncHI2/HI2A type that encoded a mcr-1 gene along with six additional antimicrobial resistance genes. Plasmid pWW012 contained an IS30-mcr-1-orf-orf-IS30 composite transposon that can be successfully transferred to Escherichia coli J53. When assessed further, the latter demonstrated considerable similarity to three plasmids pHYEC7-mcr-1, pSCC4, and pHNSHP45-2, respectively. Furthermore, plasmid pWW012 also contained a multidrug resistance (MDR) genetic structure IS26-aadA2-cmlA2-aadA1-IS406-sul3-IS26-dfrA12-aadA2-IS26, which showed high similarity to two plasmids, pHNLDF400 and pHNSHP45-2, respectively. Moreover, genes mapping to the chromosome (4,991,167-bp) were found to carry 28 mutations, related to two component regulatory systems (pmrAB, phoPQ) leading to modifications of lipid A component of the lipopolysaccharide structure. Additionally, one mutation (D87N) in the quinolone resistance determining region (QRDR) gene of gyrA was identified in this mcr-1 harboring S. Typhimurium. In addition, various virulence factors and heavy metal resistance-encoding genes were also identified on the genome of S. Typhimurium WW012. This is the first report of the complete nucleotide sequence of mcr-1-carrying MDR S. Typhimurium strain from RTE pork in China.
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Affiliation(s)
- Wei Wang
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, China National Center for Food Safety Risk Assessment, Beijing, China
| | - Zulqarnain Baloch
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Mingyuan Zou
- Heilongjiang Provincial Center for Disease Control and Prevention, Harbin, China
| | - Yinping Dong
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, China National Center for Food Safety Risk Assessment, Beijing, China
| | - Zixin Peng
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, China National Center for Food Safety Risk Assessment, Beijing, China
| | - Yujie Hu
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, China National Center for Food Safety Risk Assessment, Beijing, China
| | - Jin Xu
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, China National Center for Food Safety Risk Assessment, Beijing, China
| | - Nafeesa Yasmeen
- Institute of Microbiology, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Fengqin Li
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, China National Center for Food Safety Risk Assessment, Beijing, China
| | - Séamus Fanning
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, China National Center for Food Safety Risk Assessment, Beijing, China.,UCD-Centre for Food Safety, School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Ireland.,Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, Ireland
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83
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Plasmid-mediated colistin resistance in animals: current status and future directions. Anim Health Res Rev 2018; 18:136-152. [DOI: 10.1017/s1466252317000111] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
AbstractColistin, a peptide antibiotic belonging to the polymyxin family, is one of the last effective drugs for the treatment of multidrug resistant Gram-negative infections. Recent discovery of a novel mobile colistin resistance gene,mcr-1, from people and food animals has caused a significant public health concern and drawn worldwide attention. Extensive usage of colistin in food animals has been proposed as a major driving force for the emergence and transmission ofmcr-1; thus, there is a worldwide trend to limit colistin usage in animal production. However, despite lack of colistin usage in food animals in the USA,mcr-1-positiveEscherichia coliisolates were still isolated from swine. In this paper, we provided an overview of colistin usage and epidemiology ofmcr-1in food animals, and summarized the current status of mechanistic and evolutionary studies of the plasmid-mediated colistin resistance. Based on published information, we further discussed several non-colistin usage risk factors that may contribute to the persistence, transmission, and emergence of colistin resistance in an animal production system. Filling the knowledge gaps identified in this review is critical for risk assessment and risk management of colistin resistance, which will facilitate proactive and effective strategies to mitigate colistin resistance in future animal production systems.
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84
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Li R, Yu H, Xie M, Chen K, Dong N, Lin D, Chan EWC, Chen S. Genetic basis of chromosomally-encoded mcr-1 gene. Int J Antimicrob Agents 2018; 51:578-585. [DOI: 10.1016/j.ijantimicag.2017.11.015] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Revised: 11/21/2017] [Accepted: 11/22/2017] [Indexed: 11/15/2022]
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85
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Detection of Plasmid-Mediated Colistin Resistance, mcr-1 and mcr-2 Genes, in Salmonella spp. Isolated from Food at Retail in Belgium from 2012 to 2015. Foodborne Pathog Dis 2018; 15:114-117. [DOI: 10.1089/fpd.2017.2329] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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86
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Delannoy S, Le Devendec L, Jouy E, Fach P, Drider D, Kempf I. Characterization of Colistin-Resistant Escherichia coli Isolated from Diseased Pigs in France. Front Microbiol 2017; 8:2278. [PMID: 29209292 PMCID: PMC5702452 DOI: 10.3389/fmicb.2017.02278] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 11/06/2017] [Indexed: 11/17/2022] Open
Abstract
We studied a collection of 79 colistin-resistant Escherichia coli isolates isolated from diseased pigs in France between 2009 and 2013. We determined a number of phenotypic and genetic characters using broth microdilution to characterize their antimicrobial susceptibility. We performed pulse field gel electrophoresis (PFGE) to assess their genetic diversity and assign them to phylogroups. High-throughput real-time PCR micro-array was used to screen for a selection of genetic markers of virulence, and PCR and sequencing of the main recognized resistance genes allowed us to investigate the mechanisms of colistin resistance. Results showed that isolates belonged to several phylogroups and most had a unique PFGE profile. More than 50% of the isolates were also resistant to sulfonamides, trimethoprim, tetracycline, ampicillin or chloramphenicol. The mcr-1 gene was detected in 70 out of 79 isolates and was transferred by conjugation in 33 of them, sometimes together with resistance to sulfonamides, trimethoprim, tetracycline, ampicillin, chloramphenicol, cefotaxime, or gentamicin. Mutations in the amino-acid sequences of proteins MgrB, PhoP, PhoQ, PmrB, but not PmrA, were detected in isolates with or without the mcr-1 gene. More than one-third of the isolates harbored the F18, F4, astA, hlyA, estI, estII, elt, stx2e, iha, orfA, orfB, paa, terE, ecs1763, or ureD virulence markers. In conclusion, although most isolates had a unique PFGE profile, a few particular combinations of phylogenetic groups, virulence genes and mutations in the sequenced genes involved in colistin resistance were identified on a number of occasions, suggesting the persistence of certain isolates over several years.
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Affiliation(s)
- Sabine Delannoy
- Agence Nationale de Sécurité Sanitaire de l'Alimentation, de l'Environnement et du Travail, Food Safety Laboratory, Université Paris-Est, Maisons-Alfort, France
| | - Laetitia Le Devendec
- Agence Nationale de Sécurité Sanitaire de l'Alimentation, de l'Environnement et du Travail, Ploufragan Laboratory, Ploufragan, France
- Université Bretagne Loire, Rennes, France
| | - Eric Jouy
- Agence Nationale de Sécurité Sanitaire de l'Alimentation, de l'Environnement et du Travail, Ploufragan Laboratory, Ploufragan, France
- Université Bretagne Loire, Rennes, France
| | - Patrick Fach
- Agence Nationale de Sécurité Sanitaire de l'Alimentation, de l'Environnement et du Travail, Food Safety Laboratory, Université Paris-Est, Maisons-Alfort, France
| | - Djamel Drider
- Institut Charles Viollette, Université de Lille, Lille, France
| | - Isabelle Kempf
- Agence Nationale de Sécurité Sanitaire de l'Alimentation, de l'Environnement et du Travail, Ploufragan Laboratory, Ploufragan, France
- Université Bretagne Loire, Rennes, France
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87
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Zhu J, Gao M, Zhang R, Sun Z, Wang C, Yang F, Huang T, Qu S, Zhao L, Li Y, Hao Z. Effects of soybean meal fermented by L. plantarum, B. subtilis and S. cerevisieae on growth, immune function and intestinal morphology in weaned piglets. Microb Cell Fact 2017; 16:191. [PMID: 29121938 PMCID: PMC5679485 DOI: 10.1186/s12934-017-0809-3] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Accepted: 11/02/2017] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The present study compared the effects of soybean meal fermented by three different probiotics organisms with non-fermented soybean meal on growth performance, serum parameters, immune chemistry and intestinal morphology in weaned piglets. METHODS One hundred and forty-four 35-day old crossbred (Duroc × Landrace × Yorkshire) piglets were randomly allocated into four different dietary treatments (n = 36 per group) containing 0, 5, 10 and 15% fermented soybean meal. RESULTS The piglets fed fermented soybean meal showed an increase (p < 0.05) in average daily weight gain and a reduction in feed consumption (p < 0.05).The piglets fed 10 and 15% fermented soybean meal showed the greatest growth improvement with higher levels of serum alkaline phosphatase and total serum proteins. Serum urea nitrogen in the experimental group was significantly lower than control whereas serum IgG, IgM and IgA levels were all significantly higher. Moreover, villus height in the duodenum, jejunum, and ileum was significantly higher (p < 0.05) and the crypt depth was significantly lower (p < 0.05). The levels of the autophagy factor LC3B in piglets showed a downward trend in the jejunum and ileum compared to control. CONCLUSIONS Fermented soybean meal could significantly improve the growth, immune function and intestinal health in weaned piglets, and the best effective benefits showed in 10% FSBM group.
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Affiliation(s)
- Jiajia Zhu
- Agricultural Bio-pharmaceutical Laboratory, Qingdao Agricultural University, Qingdao, 266109 China
| | - Mingxing Gao
- Agricultural Bio-pharmaceutical Laboratory, Qingdao Agricultural University, Qingdao, 266109 China
| | - Ruili Zhang
- Agricultural Bio-pharmaceutical Laboratory, Qingdao Agricultural University, Qingdao, 266109 China
| | - Zhuojian Sun
- Agricultural Bio-pharmaceutical Laboratory, Qingdao Agricultural University, Qingdao, 266109 China
| | - Chunmei Wang
- Agricultural Bio-pharmaceutical Laboratory, Qingdao Agricultural University, Qingdao, 266109 China
| | - Fenfang Yang
- Agricultural Bio-pharmaceutical Laboratory, Qingdao Agricultural University, Qingdao, 266109 China
| | - Tingting Huang
- Agricultural Bio-pharmaceutical Laboratory, Qingdao Agricultural University, Qingdao, 266109 China
| | - Shaoqi Qu
- Agricultural Bio-pharmaceutical Laboratory, Qingdao Agricultural University, Qingdao, 266109 China
| | - Li Zhao
- Agricultural Bio-pharmaceutical Laboratory, Qingdao Agricultural University, Qingdao, 266109 China
| | - Yuwen Li
- Agricultural Bio-pharmaceutical Laboratory, Qingdao Agricultural University, Qingdao, 266109 China
| | - Zhihui Hao
- College of Veterinary Medicine, China Agricultural University, Beijing, People’s Republic of China
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88
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Cui M, Zhang J, Zhang C, Li R, Wai-Chi Chan E, Wu C, Wu C, Chen S. Distinct mechanisms of acquisition of mcr-1 -bearing plasmid by Salmonella strains recovered from animals and food samples. Sci Rep 2017; 7:13199. [PMID: 29038441 PMCID: PMC5643344 DOI: 10.1038/s41598-017-01810-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Accepted: 03/30/2017] [Indexed: 11/24/2022] Open
Abstract
Since the report of its discovery in E. coli in late 2015, the plasmid-mediated colistin resistance gene, mcr-1, has been detected in various bacterial species in clinical setting and various environmental niches. However, the transmission mechanisms of this gene in Salmonella is less defined. In this study, we conducted a comprehensive study to characterize the genetic features of mcr-1-positive Salmonella strains isolated from animals and foods. Our data revealed that Salmonella recovered from animals and food specimens exhibited highly different PFGE patterns, and acquired mcr-1-encoding plasmids via different mechanism. Plasmids harboring mcr-1 in Salmonella food isolates were all conjugative and similar as plasmids reported in other species of Enterobacteriaceae, whereas mcr-1-bearing plasmids from animal Salmonella isolates were not conjugative, and belonged to the IncHI2 type. The lack of a region carrying the tra genes was found to account for the inability to undergo conjugation for various sizes of IncHI2 plasmids harbored by animal strains. These data suggest that transmission of mcr-1-positive Salmonella from animal to food might not be a common event and food isolates may have acquired mcr-1-bearing plasmids from other mcr-1-positive bacteria such as E. coli, which co-exist in food samples.
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Affiliation(s)
- Mingquan Cui
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agriculture University, Beijing, China
| | - Jinfei Zhang
- Shenzhen Key lab for Food Biological Safety Control, Food Safety and Technology Research Center, Hong Kong PolyU Shenzhen Research Institute, Shenzhen, P. R. China.,State Key Lab of Chirosciences, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Chunping Zhang
- China Institute of Veterinary Drug Control, Beijing, P. R. China
| | - Ruichao Li
- Shenzhen Key lab for Food Biological Safety Control, Food Safety and Technology Research Center, Hong Kong PolyU Shenzhen Research Institute, Shenzhen, P. R. China.,State Key Lab of Chirosciences, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Edward Wai-Chi Chan
- State Key Lab of Chirosciences, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Chenbin Wu
- China Institute of Veterinary Drug Control, Beijing, P. R. China
| | - Congming Wu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agriculture University, Beijing, China.
| | - Sheng Chen
- Shenzhen Key lab for Food Biological Safety Control, Food Safety and Technology Research Center, Hong Kong PolyU Shenzhen Research Institute, Shenzhen, P. R. China. .,State Key Lab of Chirosciences, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
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89
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Duggett NA, Sayers E, AbuOun M, Ellis RJ, Nunez-Garcia J, Randall L, Horton R, Rogers J, Martelli F, Smith RP, Brena C, Williamson S, Kirchner M, Davies R, Crook D, Evans S, Teale C, Anjum MF. Occurrence and characterization of mcr-1-harbouring Escherichia coli isolated from pigs in Great Britain from 2013 to 2015. J Antimicrob Chemother 2017; 72:691-695. [PMID: 27999032 DOI: 10.1093/jac/dkw477] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 10/07/2016] [Indexed: 11/14/2022] Open
Abstract
Objectives To determine the occurrence of mcr-1 -harbouring Escherichia coli in archived pig material originating in Great Britain (GB) from 2013 to 2015 and characterize mcr-1 plasmids. Methods Enrichment and selective culture of 387 archived porcine caecal contents and recovery from archive of 1109 E. coli isolates to identify colistin-resistant bacteria by testing for the presence of mcr-1 by PCR and RT-PCR. mcr-1 -harbouring E. coli were characterized by WGS and compared with other available mcr-1 WGS. Results Using selective isolation following enrichment, the occurrence of mcr-1 E. coli in caeca from healthy pigs at slaughter from unique farms in GB was 0.6% (95% CI 0%-1.5%) in 2015. mcr-1 E. coli were also detected in isolates from two porcine veterinary diagnostic submissions in 2015. All isolates prior to 2015 were negative. WGS analysis of the four mcr-1 -positive E. coli indicated no other antimicrobial resistance (AMR) genes were linked to mcr-1 -plasmid-bearing contigs, despite all harbouring multiple AMR genes. The sequence similarity between mcr-1 -plasmid-bearing contigs identified and those found in GB, Chinese and South African human isolates and Danish, French and Estonian livestock-associated isolates was 90%-99%. Conclusions mcr-1- harbouring plasmids were diverse, implying transposable elements are involved in mcr-1 transmission in GB. The low number of mcr-1 -positive E. coli isolates identified suggested mcr-1 is currently uncommon in E. coli from pigs within GB. The high sequence similarity between mcr-1 plasmid draft genomes identified in pig E. coli and plasmids found in human and livestock-associated isolates globally requires further investigation to understand the full implications.
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Affiliation(s)
- Nicholas A Duggett
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone KT15 3NB, UK
| | - Ellie Sayers
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone KT15 3NB, UK.,Department of Microbial Sciences, School of Biosciences and Medicine, University of Surrey, Guildford GU2 7XH, UK
| | - Manal AbuOun
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone KT15 3NB, UK
| | - Richard J Ellis
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone KT15 3NB, UK
| | | | - Luke Randall
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone KT15 3NB, UK
| | - Robert Horton
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone KT15 3NB, UK
| | - Jon Rogers
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone KT15 3NB, UK
| | - Francesca Martelli
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone KT15 3NB, UK
| | - Richard P Smith
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone KT15 3NB, UK
| | - Camilla Brena
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone KT15 3NB, UK
| | - Susanna Williamson
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone KT15 3NB, UK
| | - Miranda Kirchner
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone KT15 3NB, UK
| | - Robert Davies
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone KT15 3NB, UK
| | - Derrick Crook
- Nuffield Department of Clinical Medicine, John Radcliffe Hospital, Oxford University, Oxford OX3 7BN, UK
| | - Sarah Evans
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone KT15 3NB, UK
| | - Chris Teale
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone KT15 3NB, UK
| | - Muna F Anjum
- Animal and Plant Health Agency, Weybridge, New Haw, Addlestone KT15 3NB, UK
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90
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Webb HE, Angulo FJ, Granier SA, Scott HM, Loneragan GH. Illustrative examples of probable transfer of resistance determinants from food animals to humans: Streptothricins, glycopeptides, and colistin. F1000Res 2017; 6:1805. [PMID: 29188021 PMCID: PMC5686510 DOI: 10.12688/f1000research.12777.1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/15/2017] [Indexed: 12/24/2022] Open
Abstract
Use, overuse, and misuse of antimicrobials contributes to selection and dissemination of bacterial resistance determinants that may be transferred to humans and constitute a global public health concern. Because of the continued emergence and expansion of antimicrobial resistance, combined with the lack of novel antimicrobial agents, efforts are underway to preserve the efficacy of current available life-saving antimicrobials in humans. As a result, uses of medically important antimicrobials in food animal production have generated debate and led to calls to reduce both antimicrobial use and the need for use. This manuscript, commissioned by the World Health Organization (WHO) to help inform the development of the WHO guidelines on the use of medically important antimicrobials in food animals, includes three illustrations of antimicrobial use in food animal production that has contributed to the selection-and subsequent transfer-of resistance determinants from food animals to humans. Herein, antimicrobial use and the epidemiology of bacterial resistance are described for streptothricins, glycopeptides, and colistin. Taken together, these historical and current narratives reinforce the need for actions that will preserve the efficacy of antimicrobials.
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Affiliation(s)
- Hattie E. Webb
- International Center for Food Industry Excellence, Department of Animal and Food Sciences, Texas Tech University, Lubbock, TX, 79409, USA
| | - Frederick J. Angulo
- Division of Global Health Protection, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, GA, 30333, USA
| | - Sophie A. Granier
- Laboratory for Food Safety, Anses, Université Paris-Est, Maisons-Alfort, F-94701, France
| | - H. Morgan Scott
- Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, 77843, USA
| | - Guy H. Loneragan
- International Center for Food Industry Excellence, Department of Animal and Food Sciences, Texas Tech University, Lubbock, TX, 79409, USA
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91
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Miao Z, Li S, Qin K, Zhou Y. Prevalence and Antimicrobial Resistance of Salmonella Isolates Recovered from Retail Pork in Major Village Markets in Tai'an Region, China. J Food Prot 2017; 80:1635-1640. [PMID: 28853630 DOI: 10.4315/0362-028x.jfp-17-019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The current study was undertaken to evaluate Salmonella contamination in retail pork at major village markets of the Tai'an region, China. In total, 200 retail pork samples were collected from four village markets between June 2015 and February 2016, of which 69 samples (34.5%) were determined to be positive for Salmonella. Eleven serotypes were identified from the 69 Salmonella isolates, and Salmonella Derby was the most common (18 of 69, 26.1%), followed by Typhimurium (17 of 69, 24.6%) and Meleagridis (11 of 69, 15.9%). Antimicrobial susceptibility testing showed that antimicrobial resistance against tetracycline was the most prevalent (42 of 69, 60.9%), but antimicrobial resistance against both ceftriaxone and cefotaxime was 1.4% (1 of 69) and 2.9% (2 of 69), respectively. Multilocus sequence typing revealed that the 69 Salmonella isolates were divided into 11 sequence types (STs), among which ST40 (18 of 69, 26.1%) was the most common, followed by ST34 (15 of 69, 21.7%) and ST64 (13 of 69, 18.8%). Collectively, retail pork at village markets in the Tai'an region has a high Salmonella contamination rate, and these isolates exhibit broad-spectrum antimicrobial resistance. However, the absence of a dominant ST demonstrates that the Salmonella isolates from retail pork may be of diverse origins.
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Affiliation(s)
| | - Song Li
- 2 College of Basic Medicine, and
| | - Kun Qin
- 3 College of Chemistry and Pharmaceutical Engineering, Taishan Medical University, Tai'an 271000, People's Republic of China
| | - Yufa Zhou
- 4 Disease Controlling Center, Veterinary Bureau of Daiyue, Tai'an 271000, People's Republic of China
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92
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Curcio L, Luppi A, Bonilauri P, Gherpelli Y, Pezzotti G, Pesciaroli M, Magistrali CF. Detection of the colistin resistance gene mcr-1 in pathogenic Escherichia coli from pigs affected by post-weaning diarrhoea in Italy. J Glob Antimicrob Resist 2017; 10:80-83. [DOI: 10.1016/j.jgar.2017.03.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 03/10/2017] [Accepted: 03/14/2017] [Indexed: 10/19/2022] Open
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93
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Card RM, Cawthraw SA, Nunez-Garcia J, Ellis RJ, Kay G, Pallen MJ, Woodward MJ, Anjum MF. An In Vitro Chicken Gut Model Demonstrates Transfer of a Multidrug Resistance Plasmid from Salmonella to Commensal Escherichia coli. mBio 2017; 8:e00777-17. [PMID: 28720731 PMCID: PMC5516254 DOI: 10.1128/mbio.00777-17] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 06/06/2017] [Indexed: 01/28/2023] Open
Abstract
The chicken gastrointestinal tract is richly populated by commensal bacteria that fulfill various beneficial roles for the host, including helping to resist colonization by pathogens. It can also facilitate the conjugative transfer of multidrug resistance (MDR) plasmids between commensal and pathogenic bacteria which is a significant public and animal health concern as it may affect our ability to treat bacterial infections. We used an in vitro chemostat system to approximate the chicken cecal microbiota, simulate colonization by an MDR Salmonella pathogen, and examine the dynamics of transfer of its MDR plasmid harboring several genes, including the extended-spectrum beta-lactamase blaCTX-M1 We also evaluated the impact of cefotaxime administration on plasmid transfer and microbial diversity. Bacterial community profiles obtained by culture-independent methods showed that Salmonella inoculation resulted in no significant changes to bacterial community alpha diversity and beta diversity, whereas administration of cefotaxime caused significant alterations to both measures of diversity, which largely recovered. MDR plasmid transfer from Salmonella to commensal Escherichia coli was demonstrated by PCR and whole-genome sequencing of isolates purified from agar plates containing cefotaxime. Transfer occurred to seven E. coli sequence types at high rates, even in the absence of cefotaxime, with resistant strains isolated within 3 days. Our chemostat system provides a good representation of bacterial interactions, including antibiotic resistance transfer in vivo It can be used as an ethical and relatively inexpensive approach to model dissemination of antibiotic resistance within the gut of any animal or human and refine interventions that mitigate its spread before employing in vivo studies.IMPORTANCE The spread of antimicrobial resistance presents a grave threat to public health and animal health and is affecting our ability to respond to bacterial infections. Transfer of antimicrobial resistance via plasmid exchange is of particular concern as it enables unrelated bacteria to acquire resistance. The gastrointestinal tract is replete with bacteria and provides an environment for plasmid transfer between commensals and pathogens. Here we use the chicken gut microbiota as an exemplar to model the effects of bacterial infection, antibiotic administration, and plasmid transfer. We show that transfer of a multidrug-resistant plasmid from the zoonotic pathogen Salmonella to commensal Escherichia coli occurs at a high rate, even in the absence of antibiotic administration. Our work demonstrates that the in vitro gut model provides a powerful screening tool that can be used to assess and refine interventions that mitigate the spread of antibiotic resistance in the gut before undertaking animal studies.
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Affiliation(s)
- Roderick M Card
- Department of Bacteriology, Animal and Plant Health Agency, New Haw, Addlestone, Surrey, United Kingdom
| | - Shaun A Cawthraw
- Department of Bacteriology, Animal and Plant Health Agency, New Haw, Addlestone, Surrey, United Kingdom
| | - Javier Nunez-Garcia
- Central Sequencing Unit, Animal and Plant Health Agency, New Haw, Addlestone, Surrey, United Kingdom
| | - Richard J Ellis
- Central Sequencing Unit, Animal and Plant Health Agency, New Haw, Addlestone, Surrey, United Kingdom
| | - Gemma Kay
- Microbiology and Infection Unit, Warwick Medical School, University of Warwick, Coventry, United Kingdom
| | - Mark J Pallen
- Microbiology and Infection Unit, Warwick Medical School, University of Warwick, Coventry, United Kingdom
| | - Martin J Woodward
- Food and Nutritional Sciences Department, University of Reading, Whiteknights, Reading, United Kingdom
| | - Muna F Anjum
- Department of Bacteriology, Animal and Plant Health Agency, New Haw, Addlestone, Surrey, United Kingdom
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94
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Barbieri NL, Vande Vorde JA, Baker AR, Horn F, Li G, Logue CM, Nolan LK. FNR Regulates the Expression of Important Virulence Factors Contributing to the Pathogenicity of Avian Pathogenic Escherichia coli. Front Cell Infect Microbiol 2017; 7:265. [PMID: 28690981 PMCID: PMC5481319 DOI: 10.3389/fcimb.2017.00265] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 06/02/2017] [Indexed: 12/14/2022] Open
Abstract
Avian pathogenic Escherichia coli (APEC) is the etiologic agent of colibacillosis, an important cause of morbidity and mortality in poultry. Though, many virulence factors associated with APEC pathogenicity are known, their regulation remains unclear. FNR (fumarate and nitrate reduction) is a well-known global regulator that works as an oxygen sensor and has previously been described as a virulence regulator in bacterial pathogens. The goal of this study was to examine the role of FNR in the regulation of APEC virulence factors, such as Type I fimbriae, and processes such as adherence and invasion, type VI secretion, survival during oxidative stress, and growth in iron-restricted environments. To accomplish this goal, APEC O1, a well-characterized, highly virulent, and fully sequenced strain of APEC harboring multiple virulence mechanisms, some of which are plasmid-linked, was compared to its FNR mutant for expression of various virulence traits. Deletion of FNR was found to affect APEC O1's adherence, invasion and expression of ompT, a plasmid-encoded outer membrane protein, type I fimbriae, and aatA, encoding an autotransporter. Indeed, the fnr− mutant showed an 8-fold reduction in expression of type I fimbriae and a highly significant (P < 0.0001) reduction in expression of fimA, ompT (plasmid-borne), and aatA. FNR was also found to regulate expression of the type VI secretion system, affecting the expression of vgrG. Further, FNR was found to be important to APEC O1's growth in iron-deficient media and survival during oxidative stress with the mutant showing a 4-fold decrease in tolerance to oxidative stress, as compared to the wild type. Thus, our results suggest that FNR functions as an important regulator of APEC virulence.
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Affiliation(s)
- Nicolle L Barbieri
- Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State UniversityAmes, IA, United States
| | - Jessica A Vande Vorde
- Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State UniversityAmes, IA, United States
| | - Alison R Baker
- Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State UniversityAmes, IA, United States
| | - Fabiana Horn
- Departamento de Biofísica, Universidade Federal do Rio Grande do SulPorto Alegre, Brazil
| | - Ganwu Li
- Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State UniversityAmes, IA, United States
| | - Catherine M Logue
- Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State UniversityAmes, IA, United States
| | - Lisa K Nolan
- Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State UniversityAmes, IA, United States.,Department of Infectious Disease, College of Veterinary Medicine, University of GeorgiaAthens, Georgia
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95
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Rhouma M, Fairbrother JM, Beaudry F, Letellier A. Post weaning diarrhea in pigs: risk factors and non-colistin-based control strategies. Acta Vet Scand 2017; 59:31. [PMID: 28526080 PMCID: PMC5437690 DOI: 10.1186/s13028-017-0299-7] [Citation(s) in RCA: 243] [Impact Index Per Article: 34.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Accepted: 05/11/2017] [Indexed: 12/20/2022] Open
Abstract
Post-weaning diarrhea (PWD) is one of the most serious threats for the swine industry worldwide. It is commonly associated with the proliferation of enterotoxigenic Escherichia coli in the pig intestine. Colistin, a cationic antibiotic, is widely used in swine for the oral treatment of intestinal infections caused by E. coli, and particularly of PWD. However, despite the effectiveness of this antibiotic in the treatment of PWD, several studies have reported high rates of colistin resistant E. coli in swine. Furthermore, this antibiotic is considered of very high importance in humans, being used for the treatment of infections due to multidrug-resistant (MDR) Gram-negative bacteria (GNB). Moreover, the recent discovery of the mcr-1 gene encoding for colistin resistance in Enterobacteriaceae on a conjugative stable plasmid has raised great concern about the possible loss of colistin effectiveness for the treatment of MDR-GNB in humans. Consequently, it has been proposed that the use of colistin in animal production should be considered as a last resort treatment only. Thus, to overcome the economic losses, which would result from the restriction of use of colistin, especially for prophylactic purposes in PWD control, we believe that an understanding of the factors contributing to the development of this disease and the putting in place of practical alternative strategies for the control of PWD in swine is crucial. Such alternatives should improve animal gut health and reduce economic losses in pigs without promoting bacterial resistance. The present review begins with an overview of risk factors of PWD and an update of colistin use in PWD control worldwide in terms of quantities and microbiological outcomes. Subsequently, alternative strategies to the use of colistin for the control of this disease are described and discussed. Finally, a practical approach for the control of PWD in its various phases is proposed.
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96
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Prevalence and Molecular Characterization of mcr-1-Positive Salmonella Strains Recovered from Clinical Specimens in China. Antimicrob Agents Chemother 2017; 61:AAC.02471-16. [PMID: 28193662 DOI: 10.1128/aac.02471-16] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 12/29/2016] [Indexed: 11/20/2022] Open
Abstract
The recently discovered colistin resistance element, mcr-1, adds to the list of antimicrobial resistance genes that rapidly erode the antimicrobial efficacy of not only the commonly used antibiotics but also the last-line agents of carbapenems and colistin. This study investigated the prevalence of the mobile colistin resistance determinant mcr-1 in Salmonella strains recovered from clinical settings in China and the transmission potential of mcr-1-bearing mobile elements harbored by such isolates. The mcr-1 gene was recoverable in 1.4% of clinical isolates tested, with the majority of them belonging to Salmonella enterica serotype Typhimurium. These isolates exhibited diverse pulsed-field gel electrophoresis (PFGE) profiles and high resistance to antibiotics other than colistin and particularly to cephalosporins. Plasmid analysis showed that mcr-1 was carried on a variety of plasmids with sizes ranging from ∼30 to ∼250 kb, among which there were conjugative plasmids of ∼30 kb, ∼60 kb, and ∼250 kb and nonconjugative plasmids of ∼140 kb, ∼180 kb, and ∼240 kb. Sequencing of representative mcr-1-carrying plasmids revealed that all conjugative plasmids belonged to the IncX4, IncI2, and IncHI2 types and were highly similar to the corresponding types of plasmids reported previously. Nonconjugative plasmids all belonged to the IncHI2 type, and the nontransferability of these plasmids was attributed to the loss of a region carrying partial or complete tra genes. Our data revealed that, similar to the situation in Escherichia coli, mcr-1 transmission in Salmonella was accelerated by various plasmids, suggesting that transmission of mcr-1-carrying plasmids between different species of Enterobacteriaceae may be a common event.
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97
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Sekizuka T, Kawanishi M, Ohnishi M, Shima A, Kato K, Yamashita A, Matsui M, Suzuki S, Kuroda M. Elucidation of quantitative structural diversity of remarkable rearrangement regions, shufflons, in IncI2 plasmids. Sci Rep 2017; 7:928. [PMID: 28424528 PMCID: PMC5430464 DOI: 10.1038/s41598-017-01082-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 03/20/2017] [Indexed: 12/30/2022] Open
Abstract
A multiple DNA inversion system, the shufflon, exists in incompatibility (Inc) I1 and I2 plasmids. The shufflon generates variants of the PilV protein, a minor component of the thin pilus. The shufflon is one of the most difficult regions for de novo genome assembly because of its structural diversity even in an isolated bacterial clone. We determined complete genome sequences, including those of IncI2 plasmids carrying mcr-1, of three Escherichia coli strains using single-molecule, real-time (SMRT) sequencing and Illumina sequencing. The sequences assembled using only SMRT sequencing contained misassembled regions in the shufflon. A hybrid analysis using SMRT and Illumina sequencing resolved the misassembled region and revealed that the three IncI2 plasmids, excluding the shufflon region, were highly conserved. Moreover, the abundance ratio of whole-shufflon structures could be determined by quantitative structural variation analysis of the SMRT data, suggesting that a remarkable heterogeneity of whole-shufflon structural variations exists in IncI2 plasmids. These findings indicate that remarkable rearrangement regions should be validated using both long-read and short-read sequencing data and that the structural variation of PilV in the shufflon might be closely related to phenotypic heterogeneity of plasmid-mediated transconjugation involved in horizontal gene transfer even in bacterial clonal populations.
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Affiliation(s)
- Tsuyoshi Sekizuka
- Pathogen Genomics Center, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjyuku-ku, Tokyo, 162-8640, Japan.
| | - Michiko Kawanishi
- Assay Division II, Bacterial Assay Section, National Veterinary Assay Laboratory, Ministry of Agriculture, Forestry and Fisheries, 1-15-1 Tokura, Kokubunji-shi, 185-8511, Tokyo, Japan
| | - Mamoru Ohnishi
- Ohnishi Laboratory of Veterinary Microbiology, 10-3-3 Nishirokujyouminami, Shibetsugunnakashibetsu-cho, 086-1106, Hokkaido, Japan
| | - Ayaka Shima
- Department of Bacteriology II, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashimurayama-shi, Tokyo, 208-0011, Japan
| | - Kengo Kato
- Pathogen Genomics Center, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjyuku-ku, Tokyo, 162-8640, Japan
| | - Akifumi Yamashita
- Pathogen Genomics Center, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjyuku-ku, Tokyo, 162-8640, Japan
| | - Mari Matsui
- Department of Bacteriology II, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashimurayama-shi, Tokyo, 208-0011, Japan
| | - Satowa Suzuki
- Department of Bacteriology II, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashimurayama-shi, Tokyo, 208-0011, Japan
| | - Makoto Kuroda
- Pathogen Genomics Center, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjyuku-ku, Tokyo, 162-8640, Japan
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98
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A Phage-Like IncY Plasmid Carrying the mcr-1 Gene in Escherichia coli from a Pig Farm in China. Antimicrob Agents Chemother 2017; 61:AAC.02035-16. [PMID: 28031198 DOI: 10.1128/aac.02035-16] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 12/14/2016] [Indexed: 12/17/2022] Open
Abstract
We report here a new type of plasmid that carries the mcr-1 gene, the pMCR-1-P3 plasmid, harbored in an Escherichia coli strain isolated from a pig farm in China. pMCR-1-P3 belongs to the IncY incompatibility group and is a phage-like plasmid that contains a large portion of phage-related sequences. The backbone of this plasmid is different from that of other mcr-1-carrying plasmids reported previously.
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99
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Jeannot K, Bolard A, Plésiat P. Resistance to polymyxins in Gram-negative organisms. Int J Antimicrob Agents 2017; 49:526-535. [PMID: 28163137 DOI: 10.1016/j.ijantimicag.2016.11.029] [Citation(s) in RCA: 255] [Impact Index Per Article: 36.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 11/10/2016] [Accepted: 11/25/2016] [Indexed: 12/30/2022]
Abstract
Polymyxins have recently been re-introduced into the therapeutic arsenal to combat infections caused by multidrug-resistant Gram-negative bacteria. However, the emergence of strains resistant to these last-resort drugs is becoming a critical issue in a growing number of countries. Both intrinsic and transferable mechanisms of polymyxin resistance have been characterised. These mechanisms as well as the epidemiological data regarding four relevant bacterial pathogens (Escherichia coli, Klebsiella pneumoniae, Acinetobacter baumannii and Pseudomonas aeruginosa) are considered in this review. A special focus is made on plasmid-mediated resistance and the spread of mcr genes.
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Affiliation(s)
- Katy Jeannot
- Laboratoire de bactériologie, Centre national de référence (CNR) de la résistance aux antibiotiques, Centre hospitalier universitaire (CHRU) de Besançon, boulevard Fleming, 25000 Besançon, France.
| | - Arnaud Bolard
- Laboratoire de bactériologie, Centre national de référence (CNR) de la résistance aux antibiotiques, Centre hospitalier universitaire (CHRU) de Besançon, boulevard Fleming, 25000 Besançon, France
| | - Patrick Plésiat
- Laboratoire de bactériologie, Centre national de référence (CNR) de la résistance aux antibiotiques, Centre hospitalier universitaire (CHRU) de Besançon, boulevard Fleming, 25000 Besançon, France
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100
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Torpdahl M, Hasman H, Litrup E, Skov RL, Nielsen EM, Hammerum AM. Detection of mcr-1-encoding plasmid-mediated colistin-resistant Salmonella isolates from human infection in Denmark. Int J Antimicrob Agents 2017; 49:261-262. [DOI: 10.1016/j.ijantimicag.2016.11.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Revised: 11/17/2016] [Accepted: 11/27/2016] [Indexed: 10/20/2022]
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