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Deschner D, Voordouw MJ, Fernando C, Campbell J, Waldner CL, Hill JE. Identification of genetic markers of resistance to macrolide class antibiotics in Mannheimia haemolytica isolates from a Saskatchewan feedlot. Appl Environ Microbiol 2024; 90:e0050224. [PMID: 38864630 PMCID: PMC11267883 DOI: 10.1128/aem.00502-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Accepted: 05/13/2024] [Indexed: 06/13/2024] Open
Abstract
Mannheimia haemolytica is a major contributor to bovine respiratory disease (BRD), which causes substantial economic losses to the beef industry, and there is an urgent need for rapid and accurate diagnostic tests to provide evidence for treatment decisions and support antimicrobial stewardship. Diagnostic sequencing can provide information about antimicrobial resistance genes in M. haemolytica more rapidly than conventional diagnostics. Realizing the full potential of diagnostic sequencing requires a comprehensive understanding of the genetic markers of antimicrobial resistance. We identified genetic markers of resistance in M. haemolytica to macrolide class antibiotics commonly used for control of BRD. Genome sequences were determined for 99 M. haemolytica isolates with six different susceptibility phenotypes collected over 2 years from a feedlot in Saskatchewan, Canada. Known macrolide resistance genes estT, msr(E), and mph(E) were identified in most resistant isolates within predicted integrative and conjugative elements (ICEs). ICE sequences lacking antibiotic resistance genes were detected in 10 of 47 susceptible isolates. No resistance-associated polymorphisms were detected in ribosomal RNA genes, although previously unreported mutations in the L22 and L23 ribosomal proteins were identified in 12 and 27 resistant isolates, respectively. Pangenome analysis led to the identification of 79 genes associated with resistance to gamithromycin, of which 95% (75 of 79) had no functional annotation. Most of the observed phenotypic resistance was explained by previously identified antibiotic resistance genes, although resistance to the macrolides gamithromycin and tulathromycin was not explained in 39 of 47 isolates, demonstrating the need for continued surveillance for novel determinants of macrolide resistance.IMPORTANCEBovine respiratory disease is the costliest disease of beef cattle in North America and the most common reason for injectable antibiotic use in beef cattle. Metagenomic sequencing offers the potential to make economically significant reductions in turnaround time for diagnostic information for evidence-based selection of antibiotics for use in the feedlot. The success of diagnostic sequencing depends on a comprehensive catalog of antimicrobial resistance genes and other genome features associated with reduced susceptibility. We analyzed the genome sequences of isolates of Mannheimia haemolytica, a major bovine respiratory disease pathogen, and identified both previously known and novel genes associated with reduced susceptibility to macrolide class antimicrobials. These findings reinforce the need for ongoing surveillance for markers of antimicrobial resistance to support improved diagnostics and antimicrobial stewardship.
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Affiliation(s)
- Darien Deschner
- Department of Veterinary Microbiology, University of Saskatchewan, Saskatoon, Canada
| | - Maarten J. Voordouw
- Department of Veterinary Microbiology, University of Saskatchewan, Saskatoon, Canada
| | - Champika Fernando
- Department of Veterinary Microbiology, University of Saskatchewan, Saskatoon, Canada
| | - John Campbell
- Department of Large Animal Clinical Sciences, University of Saskatchewan, Saskatoon, Canada
| | - Cheryl L. Waldner
- Department of Large Animal Clinical Sciences, University of Saskatchewan, Saskatoon, Canada
| | - Janet E. Hill
- Department of Veterinary Microbiology, University of Saskatchewan, Saskatoon, Canada
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Yang Y, Xie S, He F, Xu Y, Wang Z, Ihsan A, Wang X. Recent development and fighting strategies for lincosamide antibiotic resistance. Clin Microbiol Rev 2024; 37:e0016123. [PMID: 38634634 PMCID: PMC11237733 DOI: 10.1128/cmr.00161-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024] Open
Abstract
SUMMARYLincosamides constitute an important class of antibiotics used against a wide range of pathogens, including methicillin-resistant Staphylococcus aureus. However, due to the misuse of lincosamide and co-selection pressure, the resistance to lincosamide has become a serious concern. It is urgently needed to carefully understand the phenomenon and mechanism of lincosamide resistance to effectively prevent and control lincosamide resistance. To date, six mobile lincosamide resistance classes, including lnu, cfr, erm, vga, lsa, and sal, have been identified. These lincosamide resistance genes are frequently found on mobile genetic elements (MGEs), such as plasmids, transposons, integrative and conjugative elements, genomic islands, and prophages. Additionally, MGEs harbor the genes that confer resistance not only to antimicrobial agents of other classes but also to metals and biocides. The ultimate purpose of discovering and summarizing bacterial resistance is to prevent, control, and combat resistance effectively. This review highlights four promising strategies, including chemical modification of antibiotics, the development of antimicrobial peptides, the initiation of bacterial self-destruct program, and antimicrobial stewardship, to fight against resistance and safeguard global health.
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Affiliation(s)
- Yingying Yang
- National Reference Laboratory of Veterinary Drug Residues (HZAU), Huazhong Agricultural University, Wuhan, Hubei, China
- MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Shiyu Xie
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Fangjing He
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Yindi Xu
- Institute of Animal Husbandry Research, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China
| | - Zhifang Wang
- Institute of Animal Husbandry Research, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China
| | - Awais Ihsan
- Department of Biosciences, COMSATS University Islamabad, Sahiwal campus, Islamabad, Pakistan
| | - Xu Wang
- National Reference Laboratory of Veterinary Drug Residues (HZAU), Huazhong Agricultural University, Wuhan, Hubei, China
- MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei, China
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan, Hubei, China
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Herman EK, Lacoste SR, Freeman CN, Otto SJG, McCarthy EL, Links MG, Stothard P, Waldner CL. Bacterial enrichment prior to third-generation metagenomic sequencing improves detection of BRD pathogens and genetic determinants of antimicrobial resistance in feedlot cattle. Front Microbiol 2024; 15:1386319. [PMID: 38779502 PMCID: PMC11110911 DOI: 10.3389/fmicb.2024.1386319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 04/08/2024] [Indexed: 05/25/2024] Open
Abstract
Introduction Bovine respiratory disease (BRD) is one of the most important animal health problems in the beef industry. While bacterial culture and antimicrobial susceptibility testing have been used for diagnostic testing, the common practice of examining one isolate per species does not fully reflect the bacterial population in the sample. In contrast, a recent study with metagenomic sequencing of nasal swabs from feedlot cattle is promising in terms of bacterial pathogen identification and detection of antimicrobial resistance genes (ARGs). However, the sensitivity of metagenomic sequencing was impeded by the high proportion of host biomass in the nasal swab samples. Methods This pilot study employed a non-selective bacterial enrichment step before nucleic acid extraction to increase the relative proportion of bacterial DNA for sequencing. Results Non-selective bacterial enrichment increased the proportion of bacteria relative to host sequence data, allowing increased detection of BRD pathogens compared with unenriched samples. This process also allowed for enhanced detection of ARGs with species-level resolution, including detection of ARGs for bacterial species of interest that were not targeted for culture and susceptibility testing. The long-read sequencing approach enabled ARG detection on individual bacterial reads without the need for assembly. Metagenomics following non-selective bacterial enrichment resulted in substantial agreement for four of six comparisons with culture for respiratory bacteria and substantial or better correlation with qPCR. Comparison between isolate susceptibility results and detection of ARGs was best for macrolide ARGs in Mannheimia haemolytica reads but was also substantial for sulfonamide ARGs within M. haemolytica and Pasteurella multocida reads and tetracycline ARGs in Histophilus somni reads. Discussion By increasing the proportion of bacterial DNA relative to host DNA through non-selective enrichment, we demonstrated a corresponding increase in the proportion of sequencing data identifying BRD-associated pathogens and ARGs in deep nasopharyngeal swabs from feedlot cattle using long-read metagenomic sequencing. This method shows promise as a detection strategy for BRD pathogens and ARGs and strikes a balance between processing time, input costs, and generation of on-target data. This approach could serve as a valuable tool to inform antimicrobial management for BRD and support antimicrobial stewardship.
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Affiliation(s)
- Emily K. Herman
- Department of Agricultural, Food, and Nutritional Science, Faculty of Agricultural, Life, and Environmental Sciences, University of Alberta, Edmonton, AB, Canada
| | - Stacey R. Lacoste
- Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - Claire N. Freeman
- Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - Simon J. G. Otto
- HEAT-AMR (Human-Environment-Animal Transdisciplinary AMR) Research Group, School of Public Health, University of Alberta, Edmonton, AB, Canada
- Healthy Environments Thematic Area Lead, Centre for Healthy Communities, School of Public Health, University of Alberta, Edmonton, AB, Canada
| | - E. Luke McCarthy
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
| | - Matthew G. Links
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
- Department of Computer Science, College of Arts and Science, University of Saskatchewan, Saskatoon, SK, Canada
| | - Paul Stothard
- Department of Agricultural, Food, and Nutritional Science, Faculty of Agricultural, Life, and Environmental Sciences, University of Alberta, Edmonton, AB, Canada
| | - Cheryl L. Waldner
- Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada
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Feng J, Huang Y, Chen H, Xie S, Yang C, Zheng W, Su J, Zheng W, Mo J, Lv F. Sensitive and Specific Loop-Mediated Isothermal Amplification Assays for Detection of Salmonella, CTX-M-1 Group Genes, mph(A), and ermB in Stool and Blood Samples Based on Orange to Green Visible Dye. Foodborne Pathog Dis 2024. [PMID: 38527171 DOI: 10.1089/fpd.2023.0094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/27/2024] Open
Abstract
Salmonella is a globally prevalent foodborne bacterium, and ceftriaxone and azithromycin have been regarded as drugs of choice for treating Salmonella infections, particularly in children. With the growing incidence of ceftriaxone and azithromycin resistance in Salmonella, there is an urgent requirement for a rapid and dependable gene testing approach to enhance the efficacy of treating Salmonella infections. Utilizing the orange to green visible dye approach, this study developed loop-mediated isothermal amplification (LAMP) assays for the sensitive and specific detection of Salmonella, ceftriaxone and azithromycin resistance genes (including CTX-M-1 group, mph(A), and ermB genes) in stool and blood samples. The specificity and sensitivity of primers during the LAMP assays for detection of Salmonella, CTX-M-1 group, mph(A), and ermB genes were determined in this study. The detection threshold for Salmonella was found to be 1.5 × 103 colony-forming units (CFU)/mL, while it was 1.5 × 102 CFU/mL for CTX-M-1 group genes (including blaCTX-M-3, blaCTX-M-15, and blaCTX-M-55), 1.5 × 102 CFU/mL for mph(A), and 1.5 × 102 CFU/mL for ermB, showing 10-103-fold, 103-fold, and 105-fold increased sensitivity compared with the polymerase chain reaction assay, respectively. Results indicated that the LAMP primers designed for Salmonella, CTX-M-1 group, mph(A), and ermB genes possess high specificity (100%) and sensitivity (over 94%). This novel approach advocates its application in detecting Salmonella, CTX-M-1 group, mph(A), and ermB genes.
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Affiliation(s)
- Jianbo Feng
- Department of Clinical Laboratory, DongGuan SongShan Lake Tungwah Hospital, Dongguan, China
| | - Ya Huang
- Department of Clinical Laboratory, DongGuan SongShan Lake Tungwah Hospital, Dongguan, China
| | - Huixin Chen
- Technical Support Department, Guangzhou Haoyang Human Resources Co., Ltd., GuangZhou, China
| | - Shujin Xie
- Department of Clinical Laboratory, DongGuan Tungwah Hospital, Dongguan, China
| | - Congzhu Yang
- Department of Clinical Laboratory, DongGuan SongShan Lake Tungwah Hospital, Dongguan, China
| | - Weixin Zheng
- Department of Clinical Laboratory, DongGuan SongShan Lake Tungwah Hospital, Dongguan, China
| | - Jinglin Su
- Department of Clinical Laboratory, DongGuan SongShan Lake Tungwah Hospital, Dongguan, China
| | - Wentao Zheng
- Department of Clinical Laboratory, DongGuan SongShan Lake Tungwah Hospital, Dongguan, China
| | - Jiajie Mo
- Department of Clinical Laboratory, DongGuan SongShan Lake Tungwah Hospital, Dongguan, China
| | - Fei Lv
- Department of Clinical Laboratory, DongGuan SongShan Lake Tungwah Hospital, Dongguan, China
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Hong YP, Chen YT, Wang YW, Chen BH, Teng RH, Chen YS, Chiou CS. Integrative and Conjugative Element-Mediated Azithromycin Resistance in Multidrug-Resistant Salmonella enterica serovar Albany. Antimicrob Agents Chemother 2023; 65:AAC.02634-20. [PMID: 33685895 PMCID: PMC8092877 DOI: 10.1128/aac.02634-20] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 02/26/2021] [Indexed: 01/11/2023] Open
Abstract
We identified an erm42-carrying integrative and conjugative element, ICE_erm42, in 26.4% of multidrug-resistant Salmonella enterica serovar Albany isolates recovered from human salmonellosis between 2014 and 2019 in Taiwan. ICE_erm42-carrying strains displayed high-level resistance to azithromycin and the element could move into the phylogenetically distant Vibrio cholerae via conjugation.
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Affiliation(s)
- Yu-Ping Hong
- Centers for Disease Control, Taichung, Taiwan
- National Chung Hsing University, Taichung, Taiwan
| | | | | | - Bo-Han Chen
- Centers for Disease Control, Taichung, Taiwan
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Chiou CS, Hong YP, Wang YW, Chen BH, Teng RH, Song HY, Liao YS. Antimicrobial Resistance and Mechanisms of Azithromycin Resistance in Nontyphoidal Salmonella Isolates in Taiwan, 2017 to 2018. Microbiol Spectr 2023; 11:e0336422. [PMID: 36688703 PMCID: PMC9927516 DOI: 10.1128/spectrum.03364-22] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 01/04/2023] [Indexed: 01/24/2023] Open
Abstract
Antimicrobial resistance was investigated in 2,341 nontyphoidal Salmonella (NTS) isolates recovered from humans in Taiwan from 2017 to 2018 using antimicrobial susceptibility testing. Azithromycin resistance determinants were detected in 175 selected isolates using PCR and confirmed in 81 selected isolates using whole-genome sequencing. Multidrug resistance was found in 47.3% of total isolates and 96.2% of Salmonella enterica serovar Anatum and 81.7% of S. enterica serovar Typhimurium isolates. Resistance to the conventional first-line drugs (ampicillin, chloramphenicol, and cotrimoxazole), cefotaxime and ceftazidime, and ciprofloxacin was found in 32.5 to 49.0%, 20.3 to 20.4%, and 3.2% of isolates, respectively. A total of 76 (3.1%) isolates were resistant to azithromycin, which was associated with mph(A), erm(42), erm(B), and possibly the enhanced expression of efflux pump(s) due to ramAp or defective ramR. mph(A) was found in 53% of the 76 azithromycin-resistant isolates from 11 serovars and located in an IS26-mph(A)-mrx(A)-mphR(A)-IS6100 unit in various incompatibility plasmids and the chromosomes. erm(42) in S. enterica serovar Albany was carried by an integrative and conjugative element, ICE_erm42, and in S. enterica serovar Enteritidis and S. Typhimurium was located in IS26 composite transposons in the chromosomes. erm(B) was carried by IncI1-I(α) plasmids in S. Enteritidis and S. Typhimurium. ramAp was a plasmid-borne ramA, a regulatory activator of efflux pump(s), found in only S. enterica serovar Goldcoast. Since the azithromycin resistance determinants are primarily carried on mobile genetic elements, they could easily be disseminated among human bacterial pathogens. The ramAp-carrying S. Goldcoast isolates displayed azithromycin MICs of 16 to 32 mg/L. Thus, the epidemiological cutoff value of ≤16 mg/L of azithromycin proposed for wild-type NTS should be reconsidered. IMPORTANCE Antimicrobial resistance in NTS isolates is a major public health concern in Taiwan, and the mechanisms of azithromycin resistance are rarely investigated. Azithromycin and carbapenems are the last resort for the treatment of invasive salmonellosis caused by multidrug-resistant (MDR) and extensively drug-resistant Salmonella strains. Our study reports the epidemiological trend of resistance in NTS in Taiwan and the genetic determinants involved in azithromycin resistance. We point out that nearly half of NTS isolates from 2017 to 2018 are MDR, and 20% are resistant to third-generation cephalosporins. The azithromycin resistance rate (3.1%) for the NTS isolates from Taiwan is much higher than those for the NTS isolates from the United States and Europe. Our study also indicates that azithromycin resistance is primarily mediated by mph(A), erm(42), erm(B), and ramAp, which are frequently carried on mobile genetic elements. Thus, the azithromycin resistance determinants could be expected to be disseminated among diverse bacterial pathogens.
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Affiliation(s)
- Chien-Shun Chiou
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Taipei, Taiwan
| | - Yu-Ping Hong
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Taipei, Taiwan
| | - You-Wun Wang
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Taipei, Taiwan
| | - Bo-Han Chen
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Taipei, Taiwan
| | - Ru-Hsiou Teng
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Taipei, Taiwan
| | - Hui-Yung Song
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Taipei, Taiwan
| | - Ying-Shu Liao
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Taipei, Taiwan
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Pinnell LJ, Kuiper G, Huebner KL, Doster E, Parker JK, Alekozai N, Powers JG, Wallen RL, Belk KE, Morley PS. More than an anthropogenic phenomenon: Antimicrobial resistance in ungulates from natural and agricultural environments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159789. [PMID: 36309273 DOI: 10.1016/j.scitotenv.2022.159789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 10/24/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
Widely considered an anthropogenic phenomenon, antimicrobial resistance (AMR) is a naturally occurring mechanism that microorganisms use to gain competitive advantage. AMR represents a significant threat to public health and has generated criticism towards the overuse of antimicrobial drugs. Livestock have been proposed as important reservoirs for AMR accumulation. Here, we show that assemblages of AMR genes in cattle and ungulates from natural environments (Yellowstone and Rocky Mountain National Parks) are all dominated by genes conferring resistance to tetracyclines. However, cattle feces contained higher proportions of erm(A-X) genes conferring resistance to macrolide antibiotics. Medically important AMR genes differed between cattle and natural ungulates, but cumulatively were more predominant in natural soils. Our findings suggest that the commonly described predominance of tetracycline resistance in cattle feces is a natural phenomenon among multiple ungulate species and not solely a result of antimicrobial drug exposure. Yet, the virtual absence of macrolide resistance genes in natural ungulates suggests that macrolide usage in agriculture may enrich these genes in cattle. Our results show that antimicrobial use in agriculture may be promoting a potential reservoir for specific types of AMR (i.e., macrolide resistance) but that a significant proportion of the ungulate resistome appears to have natural origins.
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Affiliation(s)
- Lee J Pinnell
- Veterinary Education, Research, and Outreach Program, Texas A&M University, Canyon, TX 79015, USA
| | - Grace Kuiper
- Colorado State University, Fort Collins, CO 80523, USA
| | | | - Enrique Doster
- Veterinary Education, Research, and Outreach Program, Texas A&M University, Canyon, TX 79015, USA; Colorado State University, Fort Collins, CO 80523, USA
| | | | | | - Jenny G Powers
- Biological Resources Division, National Park Service, Fort Collins, CO 80521, USA
| | - Rick L Wallen
- Yellowstone National Park, National Park Service, Mammoth, WY 82190, USA
| | - Keith E Belk
- Colorado State University, Fort Collins, CO 80523, USA
| | - Paul S Morley
- Veterinary Education, Research, and Outreach Program, Texas A&M University, Canyon, TX 79015, USA.
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Ujvári B, Magyar T. Investigation of Macrolide Resistance Genotypes of Pasteurella multocida Isolates from Cattle and Small Ruminants. Microb Drug Resist 2022; 28:941-947. [PMID: 35969373 DOI: 10.1089/mdr.2022.0010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Macrolides are commonly used to control respiratory tract infections in ruminants, but the susceptibility of Pasteurella multocida strains has shown a decrease to macrolide antibiotics in the last decade. In this work we assessed the prevalence of macrolide resistance of 100 P. multocida isolates from ruminant hosts and studied the resistance genotypes with newly designed PCRs. Susceptibility to erythromycin and tilmicosin was tested using minimal inhibitory concentration (MIC) test strips. A newly designed PCR was used for the detection of macAB genes, and a PCR plus restriction enzyme-based technique was developed for detecting a 23S rRNA gene mutation at position 2059. Five bovine isolates with notably increased MICs (≥256 μg/mL for erythromycin and ≥32 μg/mL for tilmicosin) carried resistance genes msr(E) and mph(E) or the A2059G point mutation in the 23S rRNA gene. Over 73% strains from small ruminants and all bovine isolates were MacAB PCR positive. Bovine strains were less sensitive to macrolide antibiotics than isolates from small ruminants, and an increase in the prevalence of macrolide resistance in bovine P. multocida isolates has also been observed over time.
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Affiliation(s)
- Barbara Ujvári
- Veterinary Medical Research Institute, Budapest, Hungary
| | - Tibor Magyar
- Veterinary Medical Research Institute, Budapest, Hungary
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9
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Liu X, Yang X, Ye L, Chan EWC, Chen S. Genetic Characterization of a Conjugative Plasmid That Encodes Azithromycin Resistance in Enterobacteriaceae. Microbiol Spectr 2022; 10:e0078822. [PMID: 35471094 PMCID: PMC9241616 DOI: 10.1128/spectrum.00788-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 04/07/2022] [Indexed: 11/20/2022] Open
Abstract
Mechanisms of azithromycin resistance have rarely been reported. In this study, an IncFIB/IncHI1B plasmid that confers resistance to azithromycin was recovered from a clinical Klebsiella pneumoniae strain. This plasmid could be efficiently disseminated to Escherichia coli, Salmonella, and other Gram-negative bacterial pathogens through conjugation. This plasmid was shown to carry three macrolide resistance genes: erm(B), a novel erm(42) gene, and mph(A). The functions of erm(42) were confirmed by direct cloning of this gene and determination of the MIC of azithromycin in strains of various bacterial species which have acquired this gene. Of particular concern is the potential transmission of azithromycin-resistance to extensively drug-resistant (XDR) Salmonella, which causes infections for which treatment options are extremely limited. Monitoring and preventing dissemination of this azithromycin resistance-encoding conjugative plasmid in Enterobacteriaceae is of utmost importance. IMPORTANCE In this study, we identified a conjugative plasmid carrying a novel azithromycin resistance gene, erm(42), from a clinical K. pneumoniae strain. Conjugation of this plasmid into Salmonella conjugants conferred resistance to azithromycin, which is considered a choice for treating Salmonella infections. Of particular concern is the dissemination of this type of azithromycin resistance-encoding conjugative plasmid to extensively drug-resistant (XDR) Salmonella. The study shows that further monitoring of the dissemination of this plasmid in clinical strains of Salmonella spp. is warranted.
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Affiliation(s)
- Xiaoxuan Liu
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong
| | - Xuemei Yang
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong
| | - Lianwei Ye
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong
| | - Edward Wai-Chi Chan
- State Key Lab of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong
| | - Sheng Chen
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong
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Cho MK, Lee BT, Kim HU, Oh MK. Systems metabolic engineering of Streptomyces venezuelae for the enhanced production of pikromycin. Biotechnol Bioeng 2022; 119:2250-2260. [PMID: 35445397 DOI: 10.1002/bit.28114] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/06/2022] [Accepted: 04/15/2022] [Indexed: 11/09/2022]
Abstract
Pikromycin is an important precursor of drugs, for example, erythromycin. Hence, systems metabolic engineering for the enhanced pikromycin production can contribute to the development of pikromycin-related drugs. In this study, metabolic genes in Streptomyces venezuelae were systematically engineered for the enhanced pikromycin production. For this, a genome-scale metabolic model of S. venezuelae was reconstructed and simulated, which led to the selection of 11 metabolic gene targets. These metabolic genes, including four overexpression targets and seven knockdown targets, were individually engineered first. Next, two overexpression targets and two knockdown targets were selected based on the 11 strains' production performances in order to engineer two to four of these genes together for the potential synergistic effects on the pikromycin production. As a result, the NM1 strain with AQF52_RS24510 (methenyltetrahydrofolate cyclohydrolase/methylenetetrahydrofolate dehydrogenase) overexpression and AQF52_RS30320 (sulfite reductase) knockdown showed the best production performance among all the 22 strains constructed in this study. Fed-batch fermentation of the NM1 strain produced 295.25 mg/L of pikromycin, by far the best production titer using the native producer S. venezuelae, to the best of our knowledge. The systems metabolic engineering strategy demonstrated herein can also be applied to the overproduction of other secondary metabolites using S. venezuelae. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Min Kyung Cho
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Byung Tae Lee
- Department of Chemical and Biomolecular Engineering (BK21 four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Hyun Uk Kim
- Department of Chemical and Biomolecular Engineering (BK21 four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Min-Kyu Oh
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea
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Virulence Determinants and Antimicrobial Profiles of Pasteurella multocida Isolated from Cattle and Humans in Egypt. Antibiotics (Basel) 2021; 10:antibiotics10050480. [PMID: 33921977 PMCID: PMC8143532 DOI: 10.3390/antibiotics10050480] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 04/12/2021] [Accepted: 04/15/2021] [Indexed: 11/24/2022] Open
Abstract
Pasteurella multocida is a Gram-negative bacterium that causes drastic infections in cattle and humans. In this study, 55 isolates were recovered from 115 nasal swabs from apparently healthy and diseased cattle and humans in Minufiya and Qalyubia, Egypt. These isolates were confirmed by kmt1 existence, and molecular classification of the capsular types showed that types B, D, and E represented 23/55 (41.8%), 21/55 (38.1%), and 11/55 (20.0%), respectively. The isolates were screened for five virulence genes with hgbA, hgbB, and ptfA detected in 28/55 (50.9%), 30/55 (54.5%), and 25/55 (45.5%), respectively. We detected 17 capsular and virulence gene combinations with a discriminatory power (DI) of 0.9286; the most prevalent profiles were dcbF type D and dcbF type D, hgbA, hgbB, and ptfA, which represented 8/55 (14.5%) each. These strains exhibited high ranges of multiple antimicrobial resistance indices; the lowest resistances were against chloramphenicol, ciprofloxacin, amoxicillin/clavulanic acid, and levofloxacin. The macrolide–lincosamide–streptogramin B methylase gene erm(Q), with erm(42) encoding MLSB monomethyltransferase, mph(E) encoding a macrolide efflux pump, and msr(E) encoding macrolide-inactivating phosphotransferase were present. The class 1 and 2 integrons and extended-spectrum β-lactamase genes intl1, intl2, blaCTX-M, blaCTX-M-1, and blaTEM were detected. It is obvious to state that co-occurrence of resistance genes resulted in multiple drug-resistant phenotypes. The identified isolates were virulent, genetically diverse, and resistant to antimicrobials, highlighting the potential risk to livestock and humans.
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Snyder E, Credille B. Mannheimia haemolytica and Pasteurella multocida in Bovine Respiratory Disease: How Are They Changing in Response to Efforts to Control Them? Vet Clin North Am Food Anim Pract 2020; 36:253-268. [PMID: 32327253 DOI: 10.1016/j.cvfa.2020.02.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The bacteria Mannheimia haemolytica and Pasteurella multocida contribute to bovine respiratory disease (BRD), which is often managed with antimicrobials. Antimicrobial resistance in these bacteria has been rare, but extensively drug-resistant strains have recently become common. Routine antimicrobial use may be driving this resistance. Resistance spread is caused in part by propagation of strains harboring integrative conjugative elements. The impact of antimicrobial resistance on treatment outcomes is not clear, but clinical observations suggest that response to first treatment has decreased over time, possibly because of resistance. Clinicians should consider antimicrobial resistance when designing BRD treatment and control programs.
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Affiliation(s)
- Emily Snyder
- Food Animal Health and Management Program, Department of Population Health, College of Veterinary Medicine, University of Georgia, Veterinary Medical Center, 2200 College Station Road, Athens, GA 30602, USA
| | - Brent Credille
- Food Animal Health and Management Program, Department of Population Health, College of Veterinary Medicine, University of Georgia, Veterinary Medical Center, 2200 College Station Road, Athens, GA 30602, USA.
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Antimicrobial Resistance in Members of the Bacterial Bovine Respiratory Disease Complex Isolated from Lung Tissue of Cattle Mortalities Managed with or without the Use of Antimicrobials. Microorganisms 2020; 8:microorganisms8020288. [PMID: 32093326 PMCID: PMC7074851 DOI: 10.3390/microorganisms8020288] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 02/11/2020] [Accepted: 02/17/2020] [Indexed: 02/06/2023] Open
Abstract
Over a two-year period, Mannheimia haemolytica (MH; n = 113), Pasteurella multocida (PM; n = 47), Histophilus somni (HS; n = 41) and Mycoplasma bovis (MB; n = 227) were isolated from bovine lung tissue at necropsy from cattle raised conventionally (CON, n = 29 feedlots) or without antimicrobials [natural (NAT), n = 2 feedlots]. Excluding MB, isolates were assayed by PCR to detect the presence of 13 antimicrobial resistance (AMR) genes and five core genes associated with integrative and conjugative elements (ICEs). Antimicrobial susceptibility phenotypes and minimum inhibitory concentrations (MICs, µg/mL) were determined for a subset of isolates (MH, n = 104; PM, n = 45; HS, n = 23; and MB, n = 61) using Sensititre analyses. A subset of isolates (n = 21) was also evaluated by whole-genome sequencing (WGS) based on variation in AMR phenotype. All five ICE core genes were detected in PM and HS by PCR, but only 3/5 were present in MH. Presence of mco and tnpA ICE core genes in MH was associated with higher MICs (p < 0.05) for all tetracyclines, and 2/3 of all macrolides, aminoglycosides and fluoroquinolones evaluated. In contrast, association of ICE core genes with MICs was largely restricted to macrolides for PM and to individual tetracyclines and macrolides for HS. For MH, the average number of AMR genes markedly increased (p < 0.05) in year 2 of the study due to the emergence of a strain that was PCR positive for all 13 PCR-tested AMR genes as well as two additional AMR genes (aadA31 and blaROB-1) detected by WGS. Conventional management of cattle increased (p < 0.05) MICs of tilmicosin and tulathromycin for MH; neomycin and spectinomycin for PM; and gamithromycin and tulathromycin for MB. The average number of PCR-detected AMR genes in PM was also increased (p < 0.05) in CON mortalities. This study demonstrates increased AMR especially to macrolides by bovine respiratory disease organisms in CON as compared to NAT feedlots and a rapid increase in AMR following dissemination of strain(s) carrying ICE-associated multidrug resistance.
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Guerin F, Rose S, Cattoir V, Douthwaite S. Helcococcus kunzii methyltransferase Erm(47) responsible for MLSB resistance is induced by diverse ribosome-targeting antibiotics. J Antimicrob Chemother 2020; 75:371-378. [PMID: 31670815 DOI: 10.1093/jac/dkz441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 09/26/2019] [Accepted: 09/30/2019] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES To determine the mechanism of induction of erm(47) and its atypical expression in the Gram-positive opportunistic pathogen Helcococcus kunzii, where it confers resistance to a subset of clinically important macrolide, lincosamide and streptogramin B (MLSB) antibiotics. METHODS The resistant H. kunzii clinical isolate UCN99 was challenged with subinhibitory concentrations of a wide range of ribosome-targeting drugs. The methylation status of the H. kunzii ribosomal RNA at the MLSB binding site was then determined using an MS approach and was correlated with any increase in resistance to the drugs. RESULTS The H. kunzii erm(47) gene encodes a monomethyltransferase. Expression is induced by subinhibitory concentrations of the macrolide erythromycin, as is common for many erm genes, and surprisingly also by 16-membered macrolide, lincosamide, streptogramin, ketolide, chloramphenicol and linezolid antibiotics, all of which target the 50S ribosomal subunit. No induction was detected with spectinomycin, which targets the 30S subunit. CONCLUSIONS The structure of the erm(47) leader sequence functions as a hair trigger for the induction mechanism that expresses resistance. Consequently, translation of the erm(47) mRNA is tripped by MLSB compounds and also by drugs that target the 50S ribosomal subunit outside the MLSB site. Expression of erm(47) thus extends previous assumptions about how erm genes can be induced.
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Affiliation(s)
- François Guerin
- Service de Microbiologie, CHU de Caen, Avenue de la Côte de Nacre - CS30001 - 14033 Caen Cedex 9, France
| | - Simon Rose
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Vincent Cattoir
- Service de Bactériologie-Hygiène hospitalière & CNR de la Résistance aux Antibiotiques (laboratoire associé 'Entérocoques'), CHU de Rennes, 2 rue Henri Le Guilloux, 35033 Rennes Cedex 9, France.,Unité Inserm U1230, Université de Rennes 1, 2 avenue du Pr. Léon Bernard, 35043 Rennes, France
| | - Stephen Douthwaite
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
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Abstract
Members of the highly heterogeneous family Pasteurellaceae cause a wide variety of diseases in humans and animals. Antimicrobial agents are the most powerful tools to control such infections. However, the acquisition of resistance genes, as well as the development of resistance-mediating mutations, significantly reduces the efficacy of the antimicrobial agents. This article gives a brief description of the role of selected members of the family Pasteurellaceae in animal infections and of the most recent data on the susceptibility status of such members. Moreover, a review of the current knowledge of the genetic basis of resistance to antimicrobial agents is included, with particular reference to resistance to tetracyclines, β-lactam antibiotics, aminoglycosides/aminocyclitols, folate pathway inhibitors, macrolides, lincosamides, phenicols, and quinolones. This article focusses on the genera of veterinary importance for which sufficient data on antimicrobial susceptibility and the detection of resistance genes are currently available (Pasteurella, Mannheimia, Actinobacillus, Haemophilus, and Histophilus). Additionally, the role of plasmids, transposons, and integrative and conjugative elements in the spread of the resistance genes within and beyond the aforementioned genera is highlighted to provide insight into horizontal dissemination, coselection, and persistence of antimicrobial resistance genes. The article discusses the acquisition of diverse resistance genes by the selected Pasteurellaceae members from other Gram-negative or maybe even Gram-positive bacteria. Although the susceptibility status of these members still looks rather favorable, monitoring of their antimicrobial susceptibility is required for early detection of changes in the susceptibility status and the newly acquired/developed resistance mechanisms.
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Beker M, Rose S, Lykkebo CA, Douthwaite S. Integrative and Conjugative Elements (ICEs) in Pasteurellaceae Species and Their Detection by Multiplex PCR. Front Microbiol 2018; 9:1329. [PMID: 29997583 PMCID: PMC6028734 DOI: 10.3389/fmicb.2018.01329] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 05/30/2018] [Indexed: 11/13/2022] Open
Abstract
Strains of the Pasteurellaceae bacteria Pasteurella multocida and Mannheimia haemolytica are major etiological agents of bovine respiratory disease (BRD). Treatment of BRD with antimicrobials is becoming more challenging due to the increasing occurrence of resistance in infecting strains. In Pasteurellaceae strains exhibiting resistance to multiple antimicrobials including aminoglycosides, beta-lactams, macrolides and sulfonamides, the resistance determinants are often chromosomally encoded within integrative and conjugative elements (ICEs). To gain a more comprehensive picture of ICE structures, we sequenced the genomes of six strains of P. multocida and four strains of M. haemolytica; all strains were independent isolates and eight of them were multiple-resistant. ICE sequences varied in size from 49 to 79 kb, and were comprised of an array of conserved genes within a core region and varieties of resistance genes within accessory regions. These latter regions mainly account for the variation in the overall ICE sizes. From the sequence data, we developed a multiplex PCR assay targeting four conserved core genes required for integration and maintenance of ICE structures. Application of this assay on 75 isolates of P. multocida and M. haemolytica reveals how the presence and structures of ICEs are related to their antibiotic resistance phenotypes. The assay is also applicable to other members of the Pasteurellaceae family including Histophilus somni and indicates how clustering and dissemination of the resistance genes came about.
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Affiliation(s)
- Michal Beker
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Simon Rose
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Claus A Lykkebo
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Stephen Douthwaite
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
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Foik IP, Tuszynska I, Feder M, Purta E, Stefaniak F, Bujnicki JM. Novel inhibitors of the rRNA ErmC' methyltransferase to block resistance to macrolides, lincosamides, streptogramine B antibiotics. Eur J Med Chem 2018; 146:60-67. [DOI: 10.1016/j.ejmech.2017.11.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 10/10/2017] [Accepted: 11/13/2017] [Indexed: 12/31/2022]
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18
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Yeh JC, Lo DY, Chang SK, Chou CC, Kuo HC. Antimicrobial susceptibility, serotypes and genotypes of Pasteurella multocida
isolates associated with swine pneumonia in Taiwan. Vet Rec 2017; 181:323. [DOI: 10.1136/vr.104023] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 06/23/2017] [Accepted: 07/11/2017] [Indexed: 11/04/2022]
Affiliation(s)
- Jih-Ching Yeh
- Department of Veterinary Medicine; National Chiayi University; Chiayi Taiwan
| | - Dan-Yuan Lo
- Department of Veterinary Medicine; National Chiayi University; Chiayi Taiwan
| | - Shao-Kuang Chang
- Graduate Institute of Veterinary Medicine, National Taiwan University; Taipei Taiwan
| | - Chi-Chung Chou
- Department of Veterinary Medicine; College of Veterinary Medicine, National Chung-Hsing University; Taichung Taiwan
| | - Hung-Chih Kuo
- Department of Veterinary Medicine; National Chiayi University; Chiayi Taiwan
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19
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Snyder E, Credille B, Berghaus R, Giguère S. Prevalence of multi drug antimicrobial resistance in Mannheimia haemolytica isolated from high-risk stocker cattle at arrival and two weeks after processing1. J Anim Sci 2017; 95:1124-1131. [DOI: 10.2527/jas.2016.1110] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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20
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Cameron A, McAllister TA. Antimicrobial usage and resistance in beef production. J Anim Sci Biotechnol 2016; 7:68. [PMID: 27999667 PMCID: PMC5154118 DOI: 10.1186/s40104-016-0127-3] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 10/28/2016] [Indexed: 11/10/2022] Open
Abstract
Antimicrobials are critical to contemporary high-intensity beef production. Many different antimicrobials are approved for beef cattle, and are used judiciously for animal welfare, and controversially, to promote growth and feed efficiency. Antimicrobial administration provides a powerful selective pressure that acts on the microbial community, selecting for resistance gene determinants and antimicrobial-resistant bacteria resident in the bovine flora. The bovine microbiota includes many harmless bacteria, but also opportunistic pathogens that may acquire and propagate resistance genes within the microbial community via horizontal gene transfer. Antimicrobial-resistant bovine pathogens can also complicate the prevention and treatment of infectious diseases in beef feedlots, threatening the efficiency of the beef production system. Likewise, the transmission of antimicrobial resistance genes to bovine-associated human pathogens is a potential public health concern. This review outlines current antimicrobial use practices pertaining to beef production, and explores the frequency of antimicrobial resistance in major bovine pathogens. The effect of antimicrobials on the composition of the bovine microbiota is examined, as are the effects on the beef production resistome. Antimicrobial resistance is further explored within the context of the wider beef production continuum, with emphasis on antimicrobial resistance genes in the food chain, and risk to the human population.
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Affiliation(s)
- Andrew Cameron
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB Canada ; Agriculture and Agri-Food Canada, Lethbridge, AB Canada
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21
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Gomes C, Martínez-Puchol S, Palma N, Horna G, Ruiz-Roldán L, Pons MJ, Ruiz J. Macrolide resistance mechanisms in Enterobacteriaceae: Focus on azithromycin. Crit Rev Microbiol 2016; 43:1-30. [DOI: 10.3109/1040841x.2015.1136261] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Cláudia Gomes
- ISGlobal, Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic ? Universitat de Barcelona, Spain
| | - Sandra Martínez-Puchol
- ISGlobal, Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic ? Universitat de Barcelona, Spain
| | - Noemí Palma
- ISGlobal, Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic ? Universitat de Barcelona, Spain
| | - Gertrudis Horna
- ISGlobal, Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic ? Universitat de Barcelona, Spain
- Universidad Peruana Cayetano Heredia, Lima, Peru
| | | | - Maria J Pons
- Universidad Peruana de Ciencias Aplicadas, Lima, Peru
| | - Joaquim Ruiz
- ISGlobal, Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic ? Universitat de Barcelona, Spain
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22
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DeDonder KD, Harhay DM, Apley MD, Lubbers BV, Clawson ML, Schuller G, Harhay GP, White BJ, Larson RL, Capik SF, Riviere JE, Kalbfleisch T, Tessman RK. Observations on macrolide resistance and susceptibility testing performance in field isolates collected from clinical bovine respiratory disease cases. Vet Microbiol 2016; 192:186-193. [PMID: 27527782 DOI: 10.1016/j.vetmic.2016.07.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 07/12/2016] [Accepted: 07/25/2016] [Indexed: 12/21/2022]
Abstract
The objectives of this study were; first, to describe gamithromycin susceptibility of Mannheimia haemolytica, Pasteurella multocida, and Histophilus somni isolated from cattle diagnosed with bovine respiratory disease (BRD) and previously treated with either gamithromycin for control of BRD (mass medication=MM) or sham-saline injected (control=CON); second, to describe the macrolide resistance genes present in genetically typed M. haemolytica isolates; third, use whole-genome sequencing (WGS) to correlate the phenotypic resistance and genetic determinants for resistance among M. haemolytica isolates. M. haemolytica (n=276), P. multocida (n=253), and H. somni (n=78) were isolated from feedlot cattle diagnosed with BRD. Gamithromycin susceptibility was determined by broth microdilution. Whole-genome sequencing was utilized to determine the presence/absence of macrolide resistance genes and to genetically type M. haemolytica. Generalized linear mixed models were built for analysis. There was not a significant difference between MM and CON groups in regards to the likelihood of culturing a resistant isolate of M. haemolytica or P. multocida. The likelihood of culturing a resistant isolate of M. haemolytica differed significantly by state of origin in this study. A single M. haemolytica genetic subtype was associated with an over whelming majority of the observed resistance. H. somni isolation counts were low and statistical models would not converge. Phenotypic resistance was predicted with high sensitivity and specificity by WGS. Additional studies to elucidate the relationships between phenotypic expression of resistance/genetic determinants for resistance and clinical response to antimicrobials are necessary to inform judicious use of antimicrobials in the context of relieving animal disease and suffering.
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Affiliation(s)
- Keith D DeDonder
- Diagnostic Medicine/Pathobiology, Kansas State University College of Veterinary Medicine, Manhattan, KS, United States.
| | - Dayna M Harhay
- USDA ARS US Meat Animal Research Center, Clay Center, NE, United States
| | - Michael D Apley
- Clinical Sciences, Kansas State University College of Veterinary Medicine, Manhattan, KS, United States
| | - Brian V Lubbers
- Kansas State Veterinary Diagnostic Laboratory, Kansas State University College of Veterinary Medicine, Manhattan, KS, United States
| | - Michael L Clawson
- USDA ARS US Meat Animal Research Center, Clay Center, NE, United States
| | - Gennie Schuller
- USDA ARS US Meat Animal Research Center, Clay Center, NE, United States
| | - Gregory P Harhay
- USDA ARS US Meat Animal Research Center, Clay Center, NE, United States
| | - Brad J White
- Clinical Sciences, Kansas State University College of Veterinary Medicine, Manhattan, KS, United States
| | - Robert L Larson
- Clinical Sciences, Kansas State University College of Veterinary Medicine, Manhattan, KS, United States
| | - Sarah F Capik
- Diagnostic Medicine/Pathobiology, Kansas State University College of Veterinary Medicine, Manhattan, KS, United States
| | - Jim E Riviere
- Institute of Computational Comparative Medicine, Kansas State University College of Veterinary Medicine, Manhattan, KS, United States
| | - Ted Kalbfleisch
- Biochemistry and Molecular Genetics Department, School of Medicine, University of Louisville, Louisville, KY, United States
| | - Ronald K Tessman
- Pharmaceutical Research and Development, Merial, Duluth, GA, United States
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Dayao DAE, Gibson JS, Blackall PJ, Turni C. Antimicrobial resistance genes inActinobacillus pleuropneumoniae,Haemophilus parasuisandPasteurella multocidaisolated from Australian pigs. Aust Vet J 2016; 94:227-31. [DOI: 10.1111/avj.12458] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 09/09/2015] [Accepted: 10/28/2015] [Indexed: 01/04/2023]
Affiliation(s)
- DAE Dayao
- The University of Queensland; School of Veterinary Science; Gatton Queensland 4343 Australia
| | - JS Gibson
- The University of Queensland; School of Veterinary Science; Gatton Queensland 4343 Australia
| | - PJ Blackall
- The University of Queensland; Queensland Alliance for Agriculture and Food Innovation; EcoSciences Precinct QLD Australia
| | - C Turni
- The University of Queensland; Queensland Alliance for Agriculture and Food Innovation; EcoSciences Precinct QLD Australia
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24
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Michael GB, Freitag C, Wendlandt S, Eidam C, Feßler AT, Lopes GV, Kadlec K, Schwarz S. Emerging issues in antimicrobial resistance of bacteria from food-producing animals. Future Microbiol 2016; 10:427-43. [PMID: 25812464 DOI: 10.2217/fmb.14.93] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
During the last decade, antimicrobial resistance in bacteria from food-producing animals has become a major research topic. In this review, different emerging resistance properties related to bacteria of food-producing animals are highlighted. These include: extended-spectrum β-lactamase-producing Enterobacteriaceae; carbapenemase-producing bacteria; bovine respiratory tract pathogens, such as Pasteurella multocida and Mannheimia haemolytica, which harbor the multiresistance mediating integrative and conjugative element ICEPmu1; Gram-positive and Gram-negative bacteria that carry the multiresistance gene cfr; and the occurrence of numerous novel antimicrobial resistance genes in livestock-associated methicillin-resistant Staphylococcus aureus. The emergence of the aforementioned resistance properties is mainly based on the exchange of mobile genetic elements that carry the respective resistance genes.
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25
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A literature review of antimicrobial resistance in Pathogens associated with bovine respiratory disease. Anim Health Res Rev 2015; 16:125-34. [PMID: 26373635 DOI: 10.1017/s146625231500016x] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The objective of this paper was to perform a critical review of the literature as it pertains to the current status of antimicrobial resistance in pathogens associated with bovine respiratory disease (BRD) in beef cattle and to provide a concise yet informative narrative on the most relevant publications available. As such, the scientific literature contained in PubMed, AGRICOLA, and CAB were searched in February of 2014 for articles related to susceptibility testing of Mannheimia haemolytica, Pasteurella multocida, and Histophilus somni from cases of BRD. Titles and abstracts were read and 105 articles that were relevant to the subject of BRD antibiotic resistance were attained for further review. After the application of exclusion criterion (publications must have originated from North America, be in English, adhere to standards set forth by the Clinical and Laboratory Standards Institute, and be concerning antimicrobial resistance in BRD in beef cattle), 16 articles remained and are the focus of this publication. Due to the disparate data from the few studies that investigate susceptibility testing of BRD pathogens, a quantitative assessment or meta-analysis was not performed on the studies presented in this review. However, considering diagnostic lab data, there appears to be a clear trend of a decrease in susceptibility of the three major BRD pathogens to the antimicrobials used commonly for treatment and control of BRD. Studies performing sensitivity testing on healthy cattle report much lower resistance, but it remains unclear if this is because of a true lack of resistance mechanisms, or if the isolates do contain quiescent genes for resistance that are only phenotypically expressed following the administration of an antimicrobial for either treatment or control of BRD. Future research to address this question of genotype and phenotypic expression before and after antimicrobial administration will further advance our knowledge in this area.
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26
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Beukers AG, Zaheer R, Cook SR, Stanford K, Chaves AV, Ward MP, McAllister TA. Effect of in-feed administration and withdrawal of tylosin phosphate on antibiotic resistance in enterococci isolated from feedlot steers. Front Microbiol 2015; 6:483. [PMID: 26074889 PMCID: PMC4444845 DOI: 10.3389/fmicb.2015.00483] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 05/02/2015] [Indexed: 12/24/2022] Open
Abstract
Tylosin phosphate is a macrolide commonly administered to cattle in North America for the control of liver abscesses. This study investigated the effect of in-feed administration of tylosin phosphate to cattle at subtherapeutic levels and its subsequent withdrawal on macrolide resistance using enterococci as an indicator bacterium. Fecal samples were collected from steers that received no antibiotics and steers administered tylosin phosphate (11 ppm) in-feed for 197 days and withdrawn 28 days before slaughter. Enterococcus species isolated from fecal samples were identified through sequencing the groES-EL intergenic spacer region and subject to antimicrobial susceptibility testing, identification of resistance determinants and pulsed-field gel electrophoresis profiling. Tylosin increased (P < 0.05) the proportion of eryR and tylR enterococci within the population. Just prior to its removal, the proportion of eryR and tylR resistant enterococci began decreasing and continued to decrease after tylosin was withdrawn from the diet until there was no difference (P > 0.05) between treatments on d 225. This suggests that antibiotic withdrawal prior to slaughter contributes to a reduction in the proportion of macrolide resistant enterococci entering the food chain. Among the 504 enterococci isolates characterized, Enterococcus hirae was found to predominate (n = 431), followed by Enterococcus villorum (n = 32), Enterococcus faecium (n = 21), Enterococcus durans (n = 7), Enterococcus casseliflavus (n = 4), Enterococcus mundtii (n = 4), Enterococcus gallinarum (n = 3), Enterococcus faecalis (n = 1), and Enterococcus thailandicus (n = 1). The diversity of enterococci was greater in steers at arrival than at exit from the feedlot. Erythromycin resistant isolates harbored the erm(B) and/or msrC gene. Similar PFGE profiles of eryRE. hirae pre- and post-antibiotic treatment suggest that increased abundance of eryR enterococci after administration of tylosin phosphate reflects selection for strains that were already present within the gastrointestinal tract of cattle at arrival.
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Affiliation(s)
- Alicia G Beukers
- Faculty of Veterinary Science, The University of Sydney Sydney, NSW, Australia ; Lethbridge Research Centre, Agriculture and Agri-Food Canada Lethbridge, AB, Canada
| | - Rahat Zaheer
- Lethbridge Research Centre, Agriculture and Agri-Food Canada Lethbridge, AB, Canada
| | - Shaun R Cook
- Lethbridge Research Centre, Agriculture and Agri-Food Canada Lethbridge, AB, Canada
| | - Kim Stanford
- Alberta Agriculture and Rural Development, Lethbridge Research Centre Lethbridge, AB, Canada
| | - Alexandre V Chaves
- Faculty of Veterinary Science, The University of Sydney Sydney, NSW, Australia
| | - Michael P Ward
- Faculty of Veterinary Science, The University of Sydney Sydney, NSW, Australia
| | - Tim A McAllister
- Lethbridge Research Centre, Agriculture and Agri-Food Canada Lethbridge, AB, Canada
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Weese JS, Giguère S, Guardabassi L, Morley PS, Papich M, Ricciuto DR, Sykes JE. ACVIM consensus statement on therapeutic antimicrobial use in animals and antimicrobial resistance. J Vet Intern Med 2015; 29:487-98. [PMID: 25783842 PMCID: PMC4895515 DOI: 10.1111/jvim.12562] [Citation(s) in RCA: 176] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 01/21/2015] [Accepted: 01/27/2015] [Indexed: 12/22/2022] Open
Abstract
The epidemic of antimicrobial resistant infections continues to challenge, compromising animal care, complicating food animal production and posing zoonotic disease risks. While the overall role of therapeutic antimicrobial use in animals in the development AMR in animal and human pathogens is poorly defined, veterinarians must consider the impacts of antimicrobial use in animal and take steps to optimize antimicrobial use, so as to maximize the health benefits to animals while minimizing the likelihood of antimicrobial resistance and other adverse effects. This consensus statement aims to provide guidance on the therapeutic use of antimicrobials in animals, balancing the need for effective therapy with minimizing development of antimicrobial resistance in bacteria from animals and humans.
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Affiliation(s)
- J S Weese
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
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28
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Olsen AS, Warrass R, Douthwaite S. Macrolide resistance conferred by rRNA mutations in field isolates of Mannheimia haemolytica and Pasteurella multocida. J Antimicrob Chemother 2014; 70:420-3. [PMID: 25261417 DOI: 10.1093/jac/dku385] [Citation(s) in RCA: 25] [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
OBJECTIVES To determine how resistance to macrolides is conferred in field isolates of Pasteurella multocida and Mannheimia haemolytica that lack previously identified resistance determinants for rRNA methylation, efflux and macrolide-modifying enzymes. METHODS Isolates of P. multocida and M. haemolytica identified as being highly resistant (MICs >64 mg/L) to the macrolides erythromycin, gamithromycin, tilmicosin, tildipirosin and tulathromycin were screened by multiplex PCR for the previously identified resistance genes erm(42), msr(E) and mph(E). Strains lacking these determinants were analysed by genome sequencing and primer extension on the rRNAs. RESULTS Macrolide resistance in one M. haemolytica isolate was conferred by the 23S rRNA mutation A2058G; resistance in three P. multocida isolates were caused by mutations at the neighbouring nucleotide A2059G. In each strain, all six copies of the rrn operons encoded the respective mutations. There were no mutations in the ribosomal protein genes rplD or rplV, and no other macrolide resistance mechanism was evident. CONCLUSIONS High-level macrolide resistance can arise from 23S rRNA mutations in P. multocida and M. haemolytica despite their multiple copies of rrn. Selective pressures from exposure to different macrolide or lincosamide drugs presumably resulted in consolidation of either the A2058G or the A2059G mutation.
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Affiliation(s)
- Anders S Olsen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Ralf Warrass
- MSD Animal Health Innovation GmbH, Zur Propstei, D-55270 Schwabenheim, Germany
| | - Stephen Douthwaite
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
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Barišić I, Mitteregger D, Hirschl AM, Noehammer C, Wiesinger-Mayr H. High diversity of beta-lactamases in the General Hospital Vienna verified by whole genome sequencing and statistical analysis. INFECTION GENETICS AND EVOLUTION 2014; 27:408-17. [PMID: 25159028 DOI: 10.1016/j.meegid.2014.08.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 08/06/2014] [Accepted: 08/15/2014] [Indexed: 12/26/2022]
Abstract
The detailed analysis of antibiotic resistance mechanisms is essential for understanding the underlying evolutionary processes, the implementation of appropriate intervention strategies and to guarantee efficient treatment options. In the present study, 110 β-lactam-resistant, clinical isolates of Enterobacteriaceae sampled in 2011 in one of Europe's largest hospitals, the General Hospital Vienna, were screened for the presence of 31 β-lactamase genes. Twenty of those isolates were selected for whole genome sequencing (WGS). In addition, the number of β-lactamase genes was estimated using biostatistical models. The carbapenemase genes blaKPC-2, blaKPC-3, and blaVIM-4 were identified in carbapenem-resistant and intermediate susceptible isolates, blaOXA-72 in an extended-spectrum β-lactamase (ESBL)-positive one. Furthermore, the observed high prevalence of the acquired blaDHA-1 and blaCMY AmpC β-lactamase genes (70%) in phenotypically AmpC-positive isolates is alarming due to their capability to become carbapenem-resistant upon changes in membrane permeability. The statistical analyses revealed that approximately 55% of all β-lactamase genes present in the General Hospital Vienna were detected by this study. In summary, this work gives a very detailed picture on the disseminated β-lactamases and other resistance genes in one of Europe's largest hospitals.
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Affiliation(s)
- Ivan Barišić
- AIT Austrian Institute of Technology, Molecular Diagnostics, Muthgasse 11/2, 1190 Vienna, Austria.
| | - Dieter Mitteregger
- Medical University of Vienna, Department of Laboratory Medicine, Division of Clinical Microbiology, Währinger Gürtel 18-20, 1090 Vienna, Austria.
| | - Alexander M Hirschl
- Medical University of Vienna, Department of Laboratory Medicine, Division of Clinical Microbiology, Währinger Gürtel 18-20, 1090 Vienna, Austria.
| | - Christa Noehammer
- AIT Austrian Institute of Technology, Molecular Diagnostics, Muthgasse 11/2, 1190 Vienna, Austria.
| | - Herbert Wiesinger-Mayr
- AIT Austrian Institute of Technology, Molecular Diagnostics, Muthgasse 11/2, 1190 Vienna, Austria.
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30
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Pyörälä S, Baptiste KE, Catry B, van Duijkeren E, Greko C, Moreno MA, Pomba MCMF, Rantala M, Ružauskas M, Sanders P, Threlfall EJ, Torren-Edo J, Törneke K. Macrolides and lincosamides in cattle and pigs: use and development of antimicrobial resistance. Vet J 2014; 200:230-9. [PMID: 24685099 DOI: 10.1016/j.tvjl.2014.02.028] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 02/10/2014] [Accepted: 02/14/2014] [Indexed: 10/25/2022]
Abstract
Macrolides and lincosamides are important antibacterials for the treatment of many common infections in cattle and pigs. Products for in-feed medication with these compounds in combination with other antimicrobials are commonly used in Europe. Most recently approved injectable macrolides have very long elimination half-lives in both pigs and cattle, which allows once-only dosing regimens. Both in-feed medication and use of long-acting injections result in low concentrations of the active substance for prolonged periods, which causes concerns related to development of antimicrobial resistance. Acquired resistance to macrolides and lincosamides among food animal pathogens, including some zoonotic bacteria, has now emerged. A comparison of studies on the prevalence of resistance is difficult, since for many micro-organisms no agreed standards for susceptibility testing are available. With animal pathogens, the most dramatic increase in resistance has been seen in the genus Brachyspira. Resistance towards macrolides and lincosamides has also been detected in staphylococci isolated from pigs and streptococci from cattle. This article reviews the use of macrolides and lincosamides in cattle and pigs, as well as the development of resistance in target and some zoonotic pathogens. The focus of the review is on European conditions.
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Affiliation(s)
- Satu Pyörälä
- Department of Production Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, 04920 Saarentaus, Finland.
| | | | - Boudewijn Catry
- Scientific Institute of Public Health, Healthcare Associated Infections and Antimicrobial Resistance, 1050 Brussels, Belgium
| | - Engeline van Duijkeren
- National Institute for Public Health and the Environment, PO Box 13720, BA, Bilthoven, The Netherlands
| | | | - Miguel A Moreno
- Veterinary Faculty, Complutense University of Madrid, 28040 Madrid, Spain
| | | | - Merja Rantala
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, 00014, Finland
| | | | - Pascal Sanders
- Agence Nationale de Sécurité Sanitaire (ANSES), 35302 Fougères Cedex, France
| | - E John Threlfall
- Health Protection Agency, Centre for Infections, Laboratory of Enteric Pathogens, London NW9 5EQ, UK
| | - Jordi Torren-Edo
- European Medicines Agency, Animal and Public Health, London E14 8HB, UK
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31
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Zaheer R, Cook SR, Klima CL, Stanford K, Alexander T, Topp E, Read RR, McAllister TA. Effect of subtherapeutic vs. therapeutic administration of macrolides on antimicrobial resistance in Mannheimia haemolytica and enterococci isolated from beef cattle. Front Microbiol 2013; 4:133. [PMID: 23750157 PMCID: PMC3664329 DOI: 10.3389/fmicb.2013.00133] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Accepted: 05/06/2013] [Indexed: 11/13/2022] Open
Abstract
Macrolides are the first-line treatment against bovine respiratory disease (BRD), and are also used to treat infections in humans. The macrolide, tylosin phosphate, is often included in the diet of cattle as a preventative for liver abscesses in many regions of the world outside of Europe. This study investigated the effects of administering macrolides to beef cattle either systemically through a single subcutaneous injection (therapeutic) or continuously in-feed (subtherapeutic), on the prevalence and antimicrobial resistance of Mannheimia haemolytica and Enterococcus spp. isolated from the nasopharynx and faeces, respectively. Nasopharyngeal and faecal samples were collected weekly over 28 days from untreated beef steers and from steers injected once with tilmicosin or tulathromycin or continuously fed tylosin phosphate at dosages recommended by manufacturers. Tilmicosin and tulathromycin were effective in lowering (P < 0.05) the prevalence of M. haemolytica, whereas subtherapeutic tylosin had no effect. M. haemolytica isolated from control- and macrolide-treated animals were susceptible to macrolides as well as to other antibiotics. Major bacteria co-isolated with M. haemolytica from the nasopharynx included Pasteurella multocida, Staphylococcus spp., Acinetobacter spp., Escherichia coli and Bacillus spp. With the exception of M. haemolytica and P. multocida, erythromycin resistance was frequently found in other isolated species. Both methods of macrolide administration increased (P < 0.05) the proportion of erythromycin resistant enterococci within the population, which was comprised almost exclusively of Enterococcus hirae. Injectable macrolides impacted both respiratory and enteric microbes, whereas orally administered macrolides only influenced enteric bacteria.
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Affiliation(s)
- Rahat Zaheer
- Lethbridge Research Centre, Agriculture and Agri-Food CanadaLethbridge, AB, Canada
| | - Shaun R. Cook
- Lethbridge Research Centre, Agriculture and Agri-Food CanadaLethbridge, AB, Canada
| | - Cassidy L. Klima
- Lethbridge Research Centre, Agriculture and Agri-Food CanadaLethbridge, AB, Canada
| | - Kim Stanford
- Alberta Agriculture and Rural DevelopmentLethbridge, AB, Canada
| | - Trevor Alexander
- Lethbridge Research Centre, Agriculture and Agri-Food CanadaLethbridge, AB, Canada
| | - Edward Topp
- Southern Crop Protection and Food Research Centre, Agriculture and Agri-Food CanadaLondon, ON, Canada
| | - Ron R. Read
- Faculty of Medicine, University of CalgaryCalgary, AB, Canada
| | - Tim A. McAllister
- Lethbridge Research Centre, Agriculture and Agri-Food CanadaLethbridge, AB, Canada
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Inhibition of protein synthesis on the ribosome by tildipirosin compared with other veterinary macrolides. Antimicrob Agents Chemother 2012; 56:6033-6. [PMID: 22926570 DOI: 10.1128/aac.01250-12] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Tildipirosin is a 16-membered-ring macrolide developed to treat bacterial pathogens, including Mannheimia haemolytica and Pasteurella multocida, that cause respiratory tract infections in cattle and swine. Here we evaluated the efficacy of tildipirosin at inhibiting protein synthesis on the ribosome (50% inhibitory concentration [IC(50)], 0.23 ± 0.01 μM) and compared it with the established veterinary macrolides tylosin, tilmicosin, and tulathromycin. Mutation and methylation at key rRNA nucleotides revealed differences in the interactions of these macrolides within their common ribosomal binding site.
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Poehlsgaard J, Andersen NM, Warrass R, Douthwaite S. Visualizing the 16-membered ring macrolides tildipirosin and tilmicosin bound to their ribosomal site. ACS Chem Biol 2012; 7:1351-5. [PMID: 22563863 DOI: 10.1021/cb300105p] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The veterinary antibiotic tildipirosin (20,23-dipiperidinyl-mycaminosyl-tylonolide, Zuprevo) was developed recently to treat bovine and swine respiratory tract infections caused by bacterial pathogens such as Pasteurella multocida. Tildipirosin is a derivative of the naturally occurring compound tylosin. Here, we define drug-target interactions by combining chemical footprinting with structure modeling and show that tildipirosin, tylosin, and an earlier tylosin derivative, tilmicosin (20-dimethylpiperidinyl-mycaminosyl-tylonolide, Micotil), bind to the same macrolide site within the large subunit of P. multocida and Escherichia coli ribosomes. The drugs nevertheless differ in how they occupy this site. Interactions of the two piperidine components, which are unique to tildipirosin, distinguish this drug from tylosin and tilmicosin. The 23-piperidine of tildipirosin contacts ribosomal residues on the tunnel wall while its 20-piperidine is oriented into the tunnel lumen and is positioned to interfere with the growing nascent peptide.
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Affiliation(s)
- Jacob Poehlsgaard
- Department of Biochemistry & Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Niels M. Andersen
- Department of Biochemistry & Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Ralf Warrass
- MSD Animal
Health Group, Intervet Innovation GmbH,
Zur Propstei, D-55270 Schwabenheim, Germany
| | - Stephen Douthwaite
- Department of Biochemistry & Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
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Multiplex PCR to identify macrolide resistance determinants in Mannheimia haemolytica and Pasteurella multocida. Antimicrob Agents Chemother 2012; 56:3664-9. [PMID: 22564832 DOI: 10.1128/aac.00266-12] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
The bacterial pathogens Mannheimia haemolytica and Pasteurella multocida are major etiological agents in respiratory tract infections of cattle. Although these infections can generally be successfully treated with veterinary macrolide antibiotics, a few recent isolates have shown resistance to these drugs. Macrolide resistance in members of the family Pasteurellaceae is conferred by combinations of at least three genes: erm(42), which encodes a monomethyltransferase and confers a type I MLS(B) (macrolide, lincosamide, and streptogramin B) phenotype; msr(E), which encodes a macrolide efflux pump; and mph(E), which encodes a macrolide-inactivating phosphotransferase. Here, we describe a multiplex PCR assay that detects the presence of erm(42), msr(E), and mph(E) and differentiates between these genes. In addition, the assay distinguishes P. multocida from M. haemolytica by amplifying distinctive fragments of the 23S rRNA (rrl) genes. One rrl fragment acts as a general indicator of gammaproteobacterial species and confirms whether the PCR assay has functioned as intended on strains that are negative for erm(42), msr(E), and mph(E). The multiplex system has been tested on more than 40 selected isolates of P. multocida and M. haemolytica and correlated with MICs for the veterinary macrolides tulathromycin and tilmicosin, and the newer compounds gamithromycin and tildipirosin. The multiplex PCR system gives a rapid and robustly accurate determination of macrolide resistance genotypes and bacterial genus, matching results from microbiological methods and whole-genome sequencing.
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35
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Michael GB, Eidam C, Kadlec K, Meyer K, Sweeney MT, Murray RW, Watts JL, Schwarz S. Increased MICs of gamithromycin and tildipirosin in the presence of the genes erm(42) and msr(E)-mph(E) for bovine Pasteurella multocida and Mannheimia haemolytica. J Antimicrob Chemother 2012; 67:1555-7. [PMID: 22398653 DOI: 10.1093/jac/dks076] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Wang KT, Desmolaize B, Nan J, Zhang XW, Li LF, Douthwaite S, Su XD. Structure of the bifunctional methyltransferase YcbY (RlmKL) that adds the m7G2069 and m2G2445 modifications in Escherichia coli 23S rRNA. Nucleic Acids Res 2012; 40:5138-48. [PMID: 22362734 PMCID: PMC3367195 DOI: 10.1093/nar/gks160] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The 23S rRNA nucleotide m(2)G2445 is highly conserved in bacteria, and in Escherichia coli this modification is added by the enzyme YcbY. With lengths of around 700 amino acids, YcbY orthologs are the largest rRNA methyltransferases identified in Gram-negative bacteria, and they appear to be fusions from two separate proteins found in Gram-positives. The crystal structures described here show that both the N- and C-terminal halves of E. coli YcbY have a methyltransferase active site and their folding patterns respectively resemble the Streptococcus mutans proteins Smu472 and Smu776. Mass spectrometric analyses of 23S rRNAs showed that the N-terminal region of YcbY and Smu472 are functionally equivalent and add the m(2)G2445 modification, while the C-terminal region of YcbY is responsible for the m(7)G2069 methylation on the opposite side of the same helix (H74). Smu776 does not target G2069, and this nucleotide remains unmodified in Gram-positive rRNAs. The E.coli YcbY enzyme is the first example of a methyltransferase catalyzing two mechanistically different types of RNA modification, and has been renamed as the Ribosomal large subunit methyltransferase, RlmKL. Our structural and functional data provide insights into how this bifunctional enzyme evolved.
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Affiliation(s)
- Kai-Tuo Wang
- State Key Laboratory of Protein and Plant Gene Research, and Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, Peking University, Beijing 100871, Republic of China
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Michael GB, Kadlec K, Sweeney MT, Brzuszkiewicz E, Liesegang H, Daniel R, Murray RW, Watts JL, Schwarz S. ICEPmu1, an integrative conjugative element (ICE) of Pasteurella multocida: analysis of the regions that comprise 12 antimicrobial resistance genes. J Antimicrob Chemother 2011; 67:84-90. [PMID: 22001175 DOI: 10.1093/jac/dkr406] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND In recent years, multiresistant Pasteurella multocida isolates from bovine respiratory tract infections have been identified. These isolates have exhibited resistance to most classes of antimicrobial agents commonly used in veterinary medicine, the genetic basis of which, however, is largely unknown. METHODS Genomic DNA of a representative P. multocida isolate was subjected to whole genome sequencing. Genes have been predicted by the YACOP program, compared with the SWISSProt/EMBL databases and manually curated using the annotation software ERGO. Susceptibility testing was performed by broth microdilution according to CLSI recommendations. RESULTS The analysis of one representative P. multocida isolate identified an 82 kb integrative and conjugative element (ICE) integrated into the chromosomal DNA. This ICE, designated ICEPmu1, harboured 11 resistance genes, which confer resistance to streptomycin/spectinomycin (aadA25), streptomycin (strA and strB), gentamicin (aadB), kanamycin/neomycin (aphA1), tetracycline [tetR-tet(H)], chloramphenicol/florfenicol (floR), sulphonamides (sul2), tilmicosin/clindamycin [erm(42)] or tilmicosin/tulathromycin [msr(E)-mph(E)]. In addition, a complete bla(OXA-2) gene was detected, which, however, appeared to be functionally inactive in P. multocida. These resistance genes were organized in two regions of approximately 15.7 and 9.8 kb. Based on the sequences obtained, it is likely that plasmids, gene cassettes and insertion sequences have played a role in the development of the two resistance gene regions within this ICE. CONCLUSIONS The observation that 12 resistance genes, organized in two resistance gene regions, represent part of an ICE in P. multocida underlines the risk of simultaneous acquisition of multiple resistance genes via a single horizontal gene transfer event.
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Combinations of macrolide resistance determinants in field isolates of Mannheimia haemolytica and Pasteurella multocida. Antimicrob Agents Chemother 2011; 55:4128-33. [PMID: 21709086 DOI: 10.1128/aac.00450-11] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Respiratory tract infections in cattle are commonly associated with the bacterial pathogens Mannheimia haemolytica and Pasteurella multocida. These infections can generally be successfully treated in the field with one of several groups of antibiotics, including macrolides. A few recent isolates of these species exhibit resistance to veterinary macrolides with phenotypes that fall into three distinct classes. The first class has type I macrolide, lincosamide, and streptogramin B antibiotic resistance and, consistent with this, the 23S rRNA nucleotide A2058 is monomethylated by the enzyme product of the erm(42) gene. The second class shows no lincosamide resistance and lacks erm(42) and concomitant 23S rRNA methylation. Sequencing of the genome of a representative strain from this class, P. multocida 3361, revealed macrolide efflux and phosphotransferase genes [respectively termed msr(E) and mph(E)] that are arranged in tandem and presumably expressed from the same promoter. The third class exhibits the most marked drug phenotype, with high resistance to all of the macrolides tested, and possesses all three resistance determinants. The combinations of erm(42), msr(E), and mph(E) are chromosomally encoded and intermingled with other exogenous genes, many of which appear to have been transferred from other members of the Pasteurellaceae. The presence of some of the exogenous genes explains recent reports of resistance to additional drug classes. We have expressed recombinant versions of the erm(42), msr(E), and mph(E) genes within an isogenic Escherichia coli background to assess their individually contributions to resistance. Our findings indicate what types of compounds might have driven the selection for these resistance determinants.
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