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Masebo NT, Marliani G, Shannon Del Re F, Abram L, Cavallini D, Di Pietro M, Beltrame A, Schiavon E, Bolcato M, Hernandez Bermudez J, Gentile A, Jacinto JGP. Evaluation of antimicrobial and non-steroidal anti-inflammatory treatments for BRD on health and welfare in fattening bulls: a cross-sectional study. Vet Q 2024; 44:1-11. [PMID: 38711265 PMCID: PMC11078067 DOI: 10.1080/01652176.2024.2347928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 04/21/2024] [Indexed: 05/08/2024] Open
Abstract
Our study aimed to evaluate the effect of different treatments for BRD on health and welfare in fattening bulls. A total of 264 bulls were enrolled. Welfare was assessed on day 2 (T0) and day 15 (T1) after arrival. A decrease in the welfare level was observed from T0 to T1. All bulls were inspected clinically at T0 and T1 revealing an increase of skin lesions and lameness in T1. In both periods, a high incidence of respiratory disease was observed. A prevalence of 79.55% and 95.45% of Mycoplasma bovis using RT-PCR and culture at T0 and T1 respectively was observed. Blood samples were collected for haematology at T0 and T1. At T0, 36 animals were individually treated for BRD with an antimicrobial (IT), 54 received a metaphylactic treatment with tulathromycin (M), 150 received a metaphylactic treatment with tulathromycin plus a second antimicrobial (M + IT) whereas 24 were considered healthy and therefore not treated (NT). Additionally, 128 were treated with a non-steroid anti-inflammatory (NSAID). Neutrophils of M + IT were significantly higher than groups NT and M and the lymphocytes of M + IT were significantly lower than that of IT. White blood cells, neutrophils and N/L ratio of animals treated with an NSAID was significantly higher than that not treated. Lung inspection of 172 bulls at the abattoir indicated that 92.43% presented at least one lung lesion. A statistically significant effect of the NSAID treatment on the lung lesions was observed. Our findings indicate that BRD was a major welfare and health concern and evidence the difficulties of antimicrobial treatment of M. bovis.
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Affiliation(s)
- Naod Thomas Masebo
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, Bologna, Italy
- School of Veterinary Medicine, Wolaita Soddo University, Wolaita Soddo, Ethiopia
| | - Giovanna Marliani
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, Bologna, Italy
| | - Flavia Shannon Del Re
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, Bologna, Italy
| | - Laura Abram
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, Bologna, Italy
| | - Damiano Cavallini
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, Bologna, Italy
| | | | | | - Eliana Schiavon
- Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, PD Legnaro, Italy
| | - Marilena Bolcato
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, Bologna, Italy
| | - Joaquin Hernandez Bermudez
- Departamento de Patologia Animal, Universidade de Santiago de Compostela Campus Universitario, Lugo, Spain
| | - Arcangelo Gentile
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, Bologna, Italy
| | - Joana G. P. Jacinto
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, Bologna, Italy
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2
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Conrad CC, Funk T, Andrés-Lasheras S, Yevtushenko C, Claassen C, Otto SJG, Waldner C, Zaheer R, McAllister TA. Improving the detection of integrative conjugative elements in bovine nasopharyngeal swabs using multiplex recombinase polymerase amplification. J Microbiol Methods 2024; 221:106943. [PMID: 38705209 DOI: 10.1016/j.mimet.2024.106943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/01/2024] [Accepted: 05/02/2024] [Indexed: 05/07/2024]
Abstract
Bovine respiratory disease (BRD) is an important health and economic burden to the cattle industry worldwide. Three bacterial pathogens frequently associated with BRD (Mannheimia haemolytica, Pasteurella multocida, and Histophilus somni) can possess integrative and conjugative elements (ICEs), a diverse group of mobile genetic elements that acquire antimicrobial resistance (AMR) genes (ARGs) and decrease the therapeutic efficacy of antimicrobial drugs. We developed a duplex recombinase polymerase amplification (RPA) assay to detect up to two variants of ICEs in these Pasteurellaceae. Whole genome sequence analysis of M. haemolytica, P. multocida, and H. somni isolates harbouring ICEs revealed the presence of tnpA or ebrB next to tet(H), a conserved ARG that is frequently detected in ICEs within BRD-associated bacteria. This real-time multiplex RPA assay targeted both ICE variants simultaneously, denoted as tetH_tnpA and tetH_ebrB, with a limit of detection (LOD) of 29 (95% CI [23, 46]) and 38 genome copies (95% CI [30, 59]), respectively. DNA was extracted from 100 deep nasopharyngeal swabs collected from feedlot cattle on arrival. Samples were tested for ICEs using a real-time multiplex RPA assay, and for M. haemolytica, P. multocida, H. somni, and Mycoplasma bovis using both culture methods and RPA. The assay provided sensitive and accurate identification of ICEs in extracted DNA, providing a useful molecular tool for timely detection of potential risk factors associated with the development of antimicrobial-resistant BRD in feedlot cattle.
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Affiliation(s)
- Cheyenne C Conrad
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB T1J 4B1, Canada
| | - Tara Funk
- University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada
| | - Sara Andrés-Lasheras
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB T1J 4B1, Canada
| | | | | | - Simon J G Otto
- HEAT-AMR (Human-Environment-Animal Transdisciplinary AMR) Research Group, School of Public Health, University of Alberta, Edmonton, AB T6G 2G7, Canada
| | - Cheryl Waldner
- University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada
| | - Rahat Zaheer
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB T1J 4B1, Canada
| | - Tim A McAllister
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB T1J 4B1, Canada.
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Sultana R, Cordeiro RP, Timsit E, McAllister TA, Alexander TW. Prevalence and antimicrobial susceptibility of Mycoplasma bovis from the upper and lower respiratory tracts of healthy feedlot cattle and those diagnosed with bovine respiratory disease. Vet Microbiol 2023; 285:109838. [PMID: 37690145 DOI: 10.1016/j.vetmic.2023.109838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 06/14/2023] [Accepted: 07/27/2023] [Indexed: 09/12/2023]
Abstract
Mycoplasma bovis is an important respiratory pathogen of cattle. In this study, the prevalence and antimicrobial susceptibility of M. bovis were evaluated from two Cohorts of feedlot cattle spanning an 8-year period. In the first study conducted in 2008-2009, nasopharyngeal swabs from cattle sampled at feedlot entry and after 60 days on feed were collected (Cohort 1). In a second study conducted in 2015-2016, nasopharyngeal and trans-tracheal samples were collected from cattle diagnosed with bovine respiratory disease (BRD) and matching healthy controls (Cohort 2). For Cohort 1, the prevalence of M. bovis was lower in cattle at entry compared to when the same individuals were sampled ≥60 days later (P < 0.05). For Cohort 2, the prevalence of M. bovis was greater in both nasopharyngeal and tracheal samples from cattle diagnosed with BRD, compared to controls (P < 0.05). In both Cohorts, almost all isolates were resistant to tilmicosin. Compared to M. bovis from Cohort 1, isolates of Cohort 2 exhibited increased resistance to clindamycin, enrofloxacin, florfenicol, tylosin, and tulathromycin, with the latter showing resistance levels >90 %. These data suggest that antimicrobials used to prevent and treat BRD selected for resistance in M. bovis over the 8-year period. For macrolides, cross-resistance occurred and M. bovis can retain resistance even when antimicrobial selection pressure is removed. Within 9 years of commercial availability of tulathromycin, the majority of M. bovis displayed resistance. Therefore, longitudinal evaluation of resistance in respiratory pathogens is important to ensure efficacious treatment of BRD.
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Affiliation(s)
- Razia Sultana
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada; Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada
| | - Roniele P Cordeiro
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada
| | - Edouard Timsit
- Department of Pharma Innovation, Ceva Santé Animale, Libourne, France
| | - Tim A McAllister
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada
| | - Trevor W Alexander
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada.
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McAtee TB, Pinnell LJ, Powledge SA, Wolfe CA, Morley PS, Richeson JT. Effects of respiratory virus vaccination and bovine respiratory disease on the respiratory microbiome of feedlot cattle. Front Microbiol 2023; 14:1203498. [PMID: 37383638 PMCID: PMC10294429 DOI: 10.3389/fmicb.2023.1203498] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 05/17/2023] [Indexed: 06/30/2023] Open
Abstract
Introduction The objectives of this study were to evaluate the impacts of two modified-live virus (MLV) vaccination protocols and respiratory disease (BRD) occurrence on the microbial community composition of the nasopharynx in feedlot cattle. Methods The treatment groups included in this randomized controlled trial included: 1) no viral respiratory vaccination (CON), 2) intranasal, trivalent, MLV respiratory vaccine in addition to a parenteral BVDV type I and II vaccine (INT), and 3) parenteral, pentavalent, MLV respiratory vaccination against the same agents (INJ). Calves (n = 525) arrived in 5 truckload blocks and were stratified by body weight, sex, and presence of a pre-existing identification ear-tag. A total of 600 nasal swab samples were selected for DNA extraction and subsequent 16S rRNA gene sequencing to characterize the microbiome of the upper respiratory tract. Nasal swabs collected on d 28 from healthy cattle were used to evaluate the impact of vaccination on upper respiratory tract (URT) microbial communities. Results Firmicutes were less abundant in INT calves (n = 114; P < 0.05) and this difference was attributed to decreased relative abundance (RA) of Mycoplasma spp. (P = 0.04). Mannheimia and Pasteurella had lower RA in INT (P < 0.05). The microbiome in healthy animals on d 28 had increased Proteobacteria (largely Moraxella spp.) and decreased Firmicutes (comprised almost exclusively of Mycoplasma spp.) compared to animals that were treated for or died from BRD (P < 0.05). Cattle that died had a greater RA of Mycoplasma spp. in their respiratory microbiome on d 0 (P < 0.02). Richness was similar on d 0 and 28, but diversity increased for all animals on d 28 (P>0.05).
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Affiliation(s)
- Taylor B. McAtee
- Department of Agricultural Sciences, West Texas A&M University, Canyon, TX, United States
- VERO Program, Texas A&M University, Canyon, TX, United States
| | - Lee J. Pinnell
- VERO Program, Texas A&M University, Canyon, TX, United States
| | - Sherri A. Powledge
- Department of Agricultural Sciences, West Texas A&M University, Canyon, TX, United States
| | - Cory A. Wolfe
- VERO Program, Texas A&M University, Canyon, TX, United States
| | - Paul S. Morley
- VERO Program, Texas A&M University, Canyon, TX, United States
| | - John T. Richeson
- Department of Agricultural Sciences, West Texas A&M University, Canyon, TX, United States
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5
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Hasoon MF, Jarocki VM, Mohammed MH, Djordjevic SP, Yip HYE, Carr M, Khabiri A, Azari AA, Amanollahi R, Jozani RJ, Carracher B, Mollinger J, Deutscher AT, Hemmatzadeh F, Trott DJ. Antimicrobial susceptibility and molecular characteristics of Mycoplasma bovis isolated from cases of bovine respiratory disease in Australian feedlot cattle. Vet Microbiol 2023; 283:109779. [PMID: 37257307 DOI: 10.1016/j.vetmic.2023.109779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 05/18/2023] [Accepted: 05/19/2023] [Indexed: 06/02/2023]
Abstract
To date, antimicrobial susceptibility has not been reported for Australian Mycoplasma bovis isolates. This study determined minimal inhibitory concentrations (MICs) for 12 different antimicrobials against Australian M. bovis isolates and used whole genome sequencing to screen those showing high macrolide MICs for point mutations in target genes. Most lung tissue/swab samples from bovine respiratory disease cases (61/76, 80.3%) tested positive for M. bovis. A set of 50 representative isolates (50/61, 82.0%) that showed adequate growth, was used for MIC testing. Uniformly, low MIC values were confirmed for enrofloxacin (≤ 4 μg/mL), florfenicol (≤ 8 μg/mL), gamithromycin (≤ 2 μg/mL), spectinomycin (≤ 4 μg/mL), tetracycline (≤ 8 μg/mL), tiamulin (≤ 4 μg/mL), and tulathromycin (≤ 0.5 μg/mL). A small proportion (10%) of isolates exhibited high MICs (≥ 32 μg/mL) for tildipirosin, tilmicosin, tylosin, and lincomycin, which were above the epidemiological cut-off values for each antimicrobial (≥ 4 μg/mL). These isolates, originating from three Australian states, underwent whole genome sequencing/multilocus sequencing typing and were compared with the reference strain PG45 to investigate mutations that might be linked with the high macrolide/lincosamide MICs. All five belonged to ST52 and two macrolide associated mutations were identified within the 23 S rRNA gene (A2058G in two sequenced isolates and G748A in all sequenced isolates). Four additional 23 S rRNA gene mutations did not appear to be linked to macrolide resistance. Whilst the majority of Australian M. bovis isolates appear susceptible to the tested antimicrobials, emerging macrolide resistance was detected in three Australian states and requires continued monitoring.
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Affiliation(s)
- Mauida F Hasoon
- Australian Center for Antimicrobial Resistance Ecology, School of Animal & Veterinary Sciences, The University of Adelaide, Australia; The Davies Livestock Research Center, School of Animal and Veterinary Sciences, The University of Adelaide, Adelaide, Australia.
| | - Veronica M Jarocki
- Australian Institute for Microbiology & Infection, University of Technology Sydney, Ultimo, NSW, Australia
| | - Majed H Mohammed
- Australian Center for Antimicrobial Resistance Ecology, School of Animal & Veterinary Sciences, The University of Adelaide, Australia
| | - Steven P Djordjevic
- Australian Institute for Microbiology & Infection, University of Technology Sydney, Ultimo, NSW, Australia
| | - Hiu Ying Esther Yip
- Australian Center for Antimicrobial Resistance Ecology, School of Animal & Veterinary Sciences, The University of Adelaide, Australia
| | - Mandi Carr
- Australian Center for Antimicrobial Resistance Ecology, School of Animal & Veterinary Sciences, The University of Adelaide, Australia; The Davies Livestock Research Center, School of Animal and Veterinary Sciences, The University of Adelaide, Adelaide, Australia
| | - Aliakbar Khabiri
- Australian Center for Antimicrobial Resistance Ecology, School of Animal & Veterinary Sciences, The University of Adelaide, Australia
| | - Ania Ahani Azari
- Department of Microbiology, Gorgan Branch, Islamic Azad University, Gorgan, Iran
| | - Reza Amanollahi
- Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Raziallah Jafari Jozani
- Australian Center for Antimicrobial Resistance Ecology, School of Animal & Veterinary Sciences, The University of Adelaide, Australia
| | | | - Joanne Mollinger
- Biosecurity Sciences Laboratory, Department of Agriculture and Fisheries, 4108 QLD, Australia
| | - Ania T Deutscher
- Elizabeth Macarthur Agricultural Institute, NSW Department of Primary Industries, 2568 NSW, Australia
| | - Farhid Hemmatzadeh
- Australian Center for Antimicrobial Resistance Ecology, School of Animal & Veterinary Sciences, The University of Adelaide, Australia; The Davies Livestock Research Center, School of Animal and Veterinary Sciences, The University of Adelaide, Adelaide, Australia
| | - Darren J Trott
- Australian Center for Antimicrobial Resistance Ecology, School of Animal & Veterinary Sciences, The University of Adelaide, Australia
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6
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Barnewall RJ, Marsh IB, Williams TM, Cusack PMV, Sales N, Galea F, Szentirmay AN, Quinn JC. Efficiency-corrected PCR quantification for identification of prevalence and load of respiratory disease-causing agents in feedlot cattle. Aust Vet J 2022; 100:539-549. [PMID: 36328540 PMCID: PMC9804408 DOI: 10.1111/avj.13200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 07/10/2022] [Accepted: 07/27/2022] [Indexed: 01/05/2023]
Abstract
Bovine respiratory disease (BRD) is the most prevalent disease in feedlot cattle worldwide with Bovine alphaherpesvirus 1 (BoAHV1), Histophilus somni, Mannheimia haemolytica, Mycoplasma bovis, Pasteurella multocida and Trueperella pyogenes accepted to be common etiological agents associated with BRD. Although these agents are common in the upper and lower airways in clinical BRD cases, some also exist as normal flora suggesting their presence in the upper airways alone is not necessarily informative with respect to disease status or risk. To determine the relationship between presence, load and disease status, we investigated the relationship between load in the upper airways at induction and active BRD cases in feedlot cattle using efficiency-corrected PCR quantification. By this approach, we were able to accurately determine the prevalence and load of the key BRD agents in the upper respiratory tract showing that cattle in the hospital pen had a higher prevalence, and load, of these agents both singly and in combination compared to cattle sampled at feedlot induction. A combination of agents was the most accurate indicator of BRD risk with cattle with four or more agents detected in the upper airway more likely to be undergoing treatment for BRD than non-BRD ailments. In addition, M. bovis was rarely detected at feedlot induction but was identified at high prevalence in cattle in the hospital pen. These findings present a potential new technological approach for the investigation, analysis and identification of BRD-associated viral and bacterial agents for Australian feedlot systems as well as for BRD disease management and treatment.
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Affiliation(s)
- RJ Barnewall
- School of Agricultural, Environmental and Veterinary Sciences, Charles Sturt UniversityLocked Bag 588Wagga WaggaNew South Wales2678Australia,Gulbali Institute for Agriculture, Water and the EnvironmentWagga WaggaNew South Wales2678Australia
| | - IB Marsh
- NSW DPI, Elizabeth Macarthur Agricultural InstitutePMB 4008NarellanNew South Wales2567Australia
| | - TM Williams
- School of Agricultural, Environmental and Veterinary Sciences, Charles Sturt UniversityLocked Bag 588Wagga WaggaNew South Wales2678Australia,Gulbali Institute for Agriculture, Water and the EnvironmentWagga WaggaNew South Wales2678Australia,Present address:
School of Health, Medical and Applied Sciences, Central Queensland University554‐700 Yaamba Road, Norman GardensRockhamptonQueensland4701Australia
| | - PMV Cusack
- School of Agricultural, Environmental and Veterinary Sciences, Charles Sturt UniversityLocked Bag 588Wagga WaggaNew South Wales2678Australia,Australian Livestock Production ServicesCowraNew South Wales2794Australia
| | - N Sales
- NSW DPI, Elizabeth Macarthur Agricultural InstitutePMB 4008NarellanNew South Wales2567Australia
| | - F Galea
- NSW DPI, Elizabeth Macarthur Agricultural InstitutePMB 4008NarellanNew South Wales2567Australia
| | - AN Szentirmay
- Gene Target Solutions Pty Ltd, Unit 3CBuilding 4, 256B New Line RoadDuralNew South Wales2158Australia
| | - JC Quinn
- School of Agricultural, Environmental and Veterinary Sciences, Charles Sturt UniversityLocked Bag 588Wagga WaggaNew South Wales2678Australia,Gulbali Institute for Agriculture, Water and the EnvironmentWagga WaggaNew South Wales2678Australia
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7
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Barnewall RJ, Marsh IB, Quinn JC. Meta-Analysis of qPCR for Bovine Respiratory Disease Based on MIQE Guidelines. Front Mol Biosci 2022; 9:902401. [PMID: 35923462 PMCID: PMC9340069 DOI: 10.3389/fmolb.2022.902401] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 06/23/2022] [Indexed: 11/16/2022] Open
Abstract
Qualitative and quantitative PCR-based tests are widely used in both diagnostics and research to assess the prevalence of disease-causing pathogens in veterinary medicine. The efficacy of these tests, usually measured in terms of sensitivity and specificity, is critical in confirming or excluding a clinical diagnosis. We undertook a meta-analysis to assess the inherent value of published PCR diagnostic approaches used to confirm and quantify bacteria and viruses associated with bovine respiratory disease (BRD) in cattle. This review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A thorough search of nine electronic databases (Web of Science, EBSCOhost, Cambridge journals online, ProQuest, PubMed, Sage journals online, ScienceDirect, Wiley online library and MEDLINE) was undertaken to find studies that had reported on the use of PCR and/or qPCR for the detection and/or quantification of BRD associated organisms. All studies meeting the inclusion criteria for reporting quantitative PCR for identification of BRD associated microorganisms were included in the analysis. Studies were then assessed on the applications of the Minimum Information for Publication of Quantitative Real-Time PCR Experiment (MIQE) and PCR primer/probe sequences were extracted and tested for in silico specificity using a high level of stringency. Fourteen full-text articles were included in this study. Of these, 79% of the analysed articles did not report the application of the MIQE guidelines in their study. High stringency in silico testing of 144 previously published PCR primer/probe sequences found many to have questionable specificity. This review identified a high occurrence of primer/probe sequences with a variable in silico specificity such that this may have implications for the accuracy of reporting. Although this analysis was only applied to one specific disease state, identification of animals suspected to be suffering from bovine respiratory disease, there appears to be more broadly a need for veterinary diagnostic studies to adopt international best practice for reporting of quantitative PCR diagnostic data to be both accurate and comparable between studies and methodologies.
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Affiliation(s)
- Rebecca J. Barnewall
- School of Agricultural, Environmental and Veterinary Science, Charles Sturt University, Wagga Wagga, NSW, Australia
- Gulbali Institute, Wagga Wagga, NSW, Australia
| | - Ian B. Marsh
- NSW DPI, Elizabeth Macarthur Agricultural Institute, Menangle, NSW, Australia
| | - Jane C. Quinn
- School of Agricultural, Environmental and Veterinary Science, Charles Sturt University, Wagga Wagga, NSW, Australia
- Gulbali Institute, Wagga Wagga, NSW, Australia
- *Correspondence: Jane C. Quinn,
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8
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Sarchet JJ, Pollreisz JP, Bechtol DT, Blanding MR, Saltman RL, Taube PC. Limitations of bacterial culture, viral PCR, and tulathromycin susceptibility from upper respiratory tract samples in predicting clinical outcome of tulathromycin control or treatment of bovine respiratory disease in high-risk feeder heifers. PLoS One 2022; 17:e0247213. [PMID: 35143504 PMCID: PMC8830659 DOI: 10.1371/journal.pone.0247213] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 01/09/2022] [Indexed: 01/08/2023] Open
Abstract
A cross-sectional prospective cohort study including 1026 heifers administered tulathromycin due to high risk of clinical signs of bovine respiratory disease (BRD), measured poor association between BRD clinical outcomes and results of bacterial culture and tulathromycin susceptibility from BRD isolates of deep nasopharyngeal swabs (DNS) and adequate association with viral polymerase chain reaction (PCR) results from nasal swabs. Isolation rates from DNS collected on day-0 and at 1st BRD-treatment respectively were: Mannheimia haemolytica (10.9% & 34.1%); Pasteurella multocida (10.4% & 7.4%); Mycoplasma bovis (1.0% & 36.6%); and Histophilus somni (0.7% & 6.3%). Prevalence of BRD viral nucleic acid on nasal swabs collected exclusively at 1st BRD-treatment were: bovine parainfluenza virus type-3 (bPIV-3) 34.1%; bovine viral diarrhea virus (BVDV) 26.3%; bovine herpes virus type-1 (BHV-1) 10.8%; and bovine respiratory syncytial virus (BRSV) 54.1%. Increased relative risk, at 95% confidence intervals, of 1st BRD-treatment failure was associated with positive viral PCR results: BVDV 1.39 (1.17-1.66), bPIV-3 1.26 (1.06-1.51), BHV-1 1.52 (1.25-1.83), and BRSV 1.35 (1.11-1.63) from nasal swabs collected at 1st BRD-treatment and culture of M. haemolytica 1.23 (1.00-1.51) from DNS collected at day-0. However, in this population of high-risk feeder heifers, the predictive values of susceptible and resistant isolates had inadequate association with BRD clinical outcome. These results indicate, that using tulathromycin susceptibility testing of isolates of M. haemolytica or P. multocida from DNS collected on arrival or at 1st BRD-treatment to evaluate tulathromycin clinical efficacy, is unreliable.
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MESH Headings
- Animals
- Anti-Bacterial Agents/pharmacology
- Anti-Bacterial Agents/therapeutic use
- Bovine Respiratory Disease Complex/drug therapy
- Bovine Respiratory Disease Complex/microbiology
- Bovine Respiratory Disease Complex/pathology
- Cattle
- Cattle Diseases/drug therapy
- Cattle Diseases/microbiology
- Cattle Diseases/pathology
- Cross-Sectional Studies
- DNA, Viral/genetics
- DNA, Viral/metabolism
- Diarrhea Viruses, Bovine Viral/drug effects
- Diarrhea Viruses, Bovine Viral/genetics
- Diarrhea Viruses, Bovine Viral/isolation & purification
- Disaccharides/pharmacology
- Disaccharides/therapeutic use
- Herpesvirus 1, Bovine/drug effects
- Herpesvirus 1, Bovine/genetics
- Herpesvirus 1, Bovine/isolation & purification
- Heterocyclic Compounds/pharmacology
- Heterocyclic Compounds/therapeutic use
- Mannheimia haemolytica/drug effects
- Mannheimia haemolytica/isolation & purification
- Microbial Sensitivity Tests
- Nasopharynx/microbiology
- Nasopharynx/virology
- Pasteurella multocida/drug effects
- Pasteurella multocida/isolation & purification
- Polymerase Chain Reaction
- Prospective Studies
- RNA, Viral/genetics
- RNA, Viral/metabolism
- Respiratory Syncytial Virus, Bovine/drug effects
- Respiratory Syncytial Virus, Bovine/genetics
- Respiratory Syncytial Virus, Bovine/isolation & purification
- Risk Factors
- Treatment Failure
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Affiliation(s)
- Jeffrey J. Sarchet
- Zoetis, Parsippany-Troy Hills, New Jersey, United States of America
- * E-mail:
| | | | | | | | - Roger L. Saltman
- Zoetis, Parsippany-Troy Hills, New Jersey, United States of America
| | - Patrick C. Taube
- Zoetis, Parsippany-Troy Hills, New Jersey, United States of America
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9
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Pascual-Garrigos A, Maruthamuthu MK, Ault A, Davidson JL, Rudakov G, Pillai D, Koziol J, Schoonmaker JP, Johnson T, Verma MS. On-farm colorimetric detection of Pasteurella multocida, Mannheimia haemolytica, and Histophilus somni in crude bovine nasal samples. Vet Res 2021; 52:126. [PMID: 34600578 DOI: 10.1021/acsagscitech.0c00072] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 09/03/2021] [Indexed: 05/28/2023] Open
Abstract
This work modifies a loop-mediated isothermal amplification (LAMP) assay to detect the bovine respiratory disease (BRD) bacterial pathogens Pasteurella multocida, Mannheimia haemolytica, and Histophilus somni in a colorimetric format on a farm. BRD causes a significant health and economic burden worldwide that partially stems from the challenges involved in determining the pathogens causing the disease. Methods such as polymerase chain reaction (PCR) have the potential to identify the causative pathogens but require lab equipment and extensive sample processing making the process lengthy and expensive. To combat this limitation, LAMP allows accurate pathogen detection in unprocessed samples by the naked eye allowing for potentially faster and more precise diagnostics on the farm. The assay developed here offers 66.7-100% analytical sensitivity, and 100% analytical specificity (using contrived samples) while providing 60-100% concordance with PCR results when tested on five steers in a feedlot. The use of a consumer-grade water bath enabled on-farm execution by collecting a nasal swab from cattle and provided a colorimetric result within 60 min. Such an assay holds the potential to provide rapid pen-side diagnostics to cattle producers and veterinarians.
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Affiliation(s)
- Ana Pascual-Garrigos
- Department of Agricultural and Biological Engineering, Purdue University, 225 S University Street, West Lafayette, IN, 47907, USA
- Department of Biochemistry, Purdue University, 175 South University Street, West Lafayette, IN, 47906, USA
- Birck Nanotechnology Center, Purdue University, 1205 W State St, West Lafayette, IN, 47907, USA
| | - Murali Kannan Maruthamuthu
- Department of Agricultural and Biological Engineering, Purdue University, 225 S University Street, West Lafayette, IN, 47907, USA
- Birck Nanotechnology Center, Purdue University, 1205 W State St, West Lafayette, IN, 47907, USA
| | - Aaron Ault
- School of Electrical and Computer Engineering, Purdue University, 465 Northwestern Avenue, West Lafayette, IN, 47907, USA
| | - Josiah Levi Davidson
- Department of Agricultural and Biological Engineering, Purdue University, 225 S University Street, West Lafayette, IN, 47907, USA
- Birck Nanotechnology Center, Purdue University, 1205 W State St, West Lafayette, IN, 47907, USA
| | - Grigorii Rudakov
- Department of Agricultural and Biological Engineering, Purdue University, 225 S University Street, West Lafayette, IN, 47907, USA
- Birck Nanotechnology Center, Purdue University, 1205 W State St, West Lafayette, IN, 47907, USA
- Weldon School of Biomedical Engineering, Purdue University, 206 South Martin Jischke Drive, West Lafayette, IN, 47907, USA
| | - Deepti Pillai
- Department of Comparative Pathobiology, Purdue University, 625 Harrison Street, West Lafayette, IN, 47907, USA
| | - Jennifer Koziol
- School of Veterinary Medicine, Texas Tech University, 7671 Evans Drive , Amarillo , TX, 79106, USA
| | - Jon P Schoonmaker
- Department of Animal Sciences, Purdue University, 270 S Russell Street, West Lafayette, IN, 47907, USA
| | - Timothy Johnson
- Department of Animal Sciences, Purdue University, 270 S Russell Street, West Lafayette, IN, 47907, USA
| | - Mohit S Verma
- Department of Agricultural and Biological Engineering, Purdue University, 225 S University Street, West Lafayette, IN, 47907, USA.
- Birck Nanotechnology Center, Purdue University, 1205 W State St, West Lafayette, IN, 47907, USA.
- Weldon School of Biomedical Engineering, Purdue University, 206 South Martin Jischke Drive, West Lafayette, IN, 47907, USA.
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10
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Abstract
Bovine respiratory disease (BRD) is the most common cause of morbidity and mortality in North American beef cattle. In recent years, isolation of strains of Mannheimia haemolytica that are resistant to multiple different classes of antimicrobials has become commonplace. New research would suggest that the routine use of antimicrobials by some cattle operations might be driving emerging resistance patterns, with the majority of the spread observed due to propagation of strains of M. haemolytica that have acquired integrative conjugative elements. To date, there is little information evaluating the impact of antimicrobial resistance on clinical outcome in cattle with BRD.
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11
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Holschbach CL, Aulik N, Poulsen K, Ollivett TL. Prevalence and temporal trends in antimicrobial resistance of bovine respiratory disease pathogen isolates submitted to the Wisconsin Veterinary Diagnostic Laboratory: 2008-2017. J Dairy Sci 2020; 103:9464-9472. [PMID: 32747101 DOI: 10.3168/jds.2019-17570] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 05/19/2020] [Indexed: 11/19/2022]
Abstract
The objective of this study was to describe the prevalence and trends in antimicrobial resistance for bacterial pathogens associated with bovine respiratory disease (BRD) isolated from samples submitted to the Wisconsin Veterinary Diagnostic Laboratory (WVDL). Data were retrospectively collected from bovine respiratory isolates including Pasteurella multocida, Mannheimia haemolytica, Histophilus somni, and Bibersteinia trehalosi identified at the WVDL between January 2008 and December 2017. Antimicrobial susceptibility testing data were queried from antimicrobial resistance databases at the WVDL. A total of 4,261 isolates were identified. Pasteurella multocida was most frequently identified, accounting for 2,094 isolates (49% of total) over the study period. Mannheimia haemolytica was the second most frequently isolated bacterial respiratory pathogen (n = 1,267, 30%) followed by H. somni (n = 749, 18%) and B. trehalosi (n = 151, 4%). Over the 10-yr period, B. trehalosi had the highest median percentage of isolates that were resistant to at least one antibiotic at 33% (interquartile range: 24, 47) followed by M. haemolytica (13%; 8, 23). For P. multocida, 10% (4, 26) of isolates were classified as resistant to at least one antibiotic, whereas H. somni had the fewest resistant isolates (9%; 3, 15). When comparing 2013-2017 to 2008-2012, the overall percentage of resistant isolates for P. multocida and B. trehalosi decreased, whereas the percentage of resistant isolates for M. haemolytica and H. somni increased. Increased resistance against florfenicol, fluoroquinolones, gentamicin, tilmicosin, and tulathromycin was observed for M. haemolytica. These data show that antimicrobial susceptibility for BRD bacterial pathogens has changed in the population served by the WVDL over this 10-yr period. For P. multocida, resistance is relatively low and has either improved or at least remained constant for the majority of drugs labeled for treatment of respiratory disease in dairy cattle. Veterinarians and producers should be aware of the bacterial pathogens most commonly associated with BRD and work toward early disease detection, proper antibiotic administration, and monitoring lung lesions to ensure that their treatment protocols improve lung health.
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Affiliation(s)
- C L Holschbach
- Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison 53706.
| | - N Aulik
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin, Madison 53706; Wisconsin Veterinary Diagnostic Laboratory, Madison 53706
| | - K Poulsen
- Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison 53706; Wisconsin Veterinary Diagnostic Laboratory, Madison 53706
| | - T L Ollivett
- Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison 53706
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12
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Conrad CC, Daher RK, Stanford K, Amoako KK, Boissinot M, Bergeron MG, Alexander T, Cook S, Ralston B, Zaheer R, Niu YD, McAllister T. A Sensitive and Accurate Recombinase Polymerase Amplification Assay for Detection of the Primary Bacterial Pathogens Causing Bovine Respiratory Disease. Front Vet Sci 2020; 7:208. [PMID: 32426381 PMCID: PMC7212441 DOI: 10.3389/fvets.2020.00208] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 03/30/2020] [Indexed: 12/25/2022] Open
Abstract
Rapid and accurate diagnosis of bovine respiratory disease (BRD) presents a substantial challenge to the North American cattle industry. Here we utilize recombinase polymerase amplification (RPA), a fast and sensitive isothermal DNA-based technology for the detection of four BRD pathogens (Mannheimia haemolytica, Pasteurella multocida, Histophilus somni, Mycoplasma bovis), genes coding antimicrobial resistance (AMR) and integrative conjugative elements (ICE) which can harbor AMR genes. Eleven RPA assays were designed and validated including: a) one conventional species-specific multiplex assay targeting the 4 BRD pathogens, b) two species-specific real-time multiplex RPA assays targeting M. haemolytica/M. bovis and P. multocida/H. somni, respectively with a novel competitive internal amplification control, c) seven conventional assays targeting AMR genes (tetH, tetR, msrE, mphE, sul2, floR, erm42), and d) one real-time assay targeting ICE. Each real-time RPA assay was tested on 100 deep nasopharyngeal swabs (DNPS) collected from feedlot cattle previously assessed for targets using either culture methods and/or polymerase chain reaction (PCR) verification (TC-PCR). The developed RPA assays enabled sensitive and accurate identification of BRD agents and AMR/ICE genes directly from DNPS, in a shorter period than TC-PCR, showing considerable promise as a tool for point-of-care identification of BRD pathogens and antimicrobial resistance genes.
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Affiliation(s)
- Cheyenne C Conrad
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB, Canada
| | - Rana K Daher
- Centre de Recherche en Infectiologie de l'Université Laval, Québec City, QC, Canada
| | - Kim Stanford
- Alberta Agriculture and Forestry, Lethbridge, AB, Canada
| | - Kingsley K Amoako
- National Centre for Animal Disease, Canadian Food Inspection Agency, Lethbridge, AB, Canada
| | - Maurice Boissinot
- Centre de Recherche en Infectiologie de l'Université Laval, Québec City, QC, Canada
| | - Michel G Bergeron
- Centre de Recherche en Infectiologie de l'Université Laval, Québec City, QC, Canada
| | - Trevor Alexander
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB, Canada
| | - Shaun Cook
- Alberta Agriculture and Forestry, Lethbridge, AB, Canada
| | | | - Rahat Zaheer
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB, Canada
| | - Yan D Niu
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Tim McAllister
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB, Canada
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13
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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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14
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van Leenen K, Van Driessche L, De Cremer L, Masmeijer C, Boyen F, Deprez P, Pardon B. Comparison of bronchoalveolar lavage fluid bacteriology and cytology in calves classified based on combined clinical scoring and lung ultrasonography. Prev Vet Med 2020; 176:104901. [PMID: 32014683 DOI: 10.1016/j.prevetmed.2020.104901] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 12/20/2019] [Accepted: 01/14/2020] [Indexed: 12/19/2022]
Abstract
Respiratory tract infections are the leading cause of antimicrobial use in calves. Combining clinical examination and lung ultrasonography allows on-farm classification of calves as healthy or suffering from an upper respiratory tract infection (URTI), subclinical or clinical pneumonia. This might help to improve targeted antimicrobial therapy, restricting treatment to pneumonic cases. However, to what extent these diagnostic categories coincide with expected bacteriological and cytological bronchoalveolar lavage fluid (BALf) characteristics is currently unknown. The objective of this study was therefore to compare BALf bacteriology and cytology between healthy calves and calves with URTI, subclinical and clinical pneumonia. The hypothesis was that calves with subclinical and clinical pneumonia would have higher quantitative bacterial counts, bacterial isolation rates and neutrophil counts than URTIs or healthy animals. A cross-sectional study was performed on 305 indoor group-housed dairy and beef calves, from 62 farms. Calves were classified by combining clinical examination and lung ultrasonography. Clinical respiratory disease was defined using the Wisconsin score card and the Healthy Criterion (HC). The HC classified calves as clinically ill if at least one clinical sign was present. Ultrasonographic lung consolidation with a depth of ≥1 cm was considered indicative for pneumonia. Cytology and bacteriology were performed on BALf sampled by non-endoscopic bronchoalveolar lavage. Calves with clinical pneumonia were further subdivided based on culture result and presence of neutrophils phagocytosing bacteria. Combined lung ultrasonography and clinical examination (HC) classified 25.9 % (79/305) of the calves as healthy, 33.1 % (101/305) as URTI, 10.2 % (31/305) as subclinical and 30.8 % (94/305) as clinical pneumonia. Bacterial isolation rates and quantitative BALf culture results did not differ between groups. Calves with clinical pneumonia and neutrophil phagocytosis showed a significantly higher BALf neutrophil percentage compared to healthy calves (59.0 % vs. 37.7 % in healthy calves, P =.03). Inversely, lymphocyte percentage was lower in these calves (1.8 % vs. 5.3 % in healthy calves, P = .003). Classification of calves using lung ultrasonography and clinical scoring did not correspond with BALf bacteriology and cytology findings, as extrapolated from human and companion animal medicine. Under the current housing conditions of this study high rates of non-infectious airway inflammation or airway colonization by opportunistic pathogens, rather than infection might explain this. Isolation of respiratory pathogens from calves with various signs of respiratory disease or ultrasonographic lesions should be interpreted carefully. Of all cytological features, phagocytosis by neutrophils in BALf might be a useful criterion supporting the diagnosis of bacterial respiratory tract infection.
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Affiliation(s)
- Katharina van Leenen
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium.
| | - Laura Van Driessche
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Lieze De Cremer
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Christien Masmeijer
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Filip Boyen
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Piet Deprez
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Bart Pardon
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
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15
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Abstract
There is broad consensus internationally that surveillance of the levels of antimicrobial resistance (AMR) occurring in various systems underpins strategies to address the issue. The key reasons for surveillance of resistance are to determine (i) the size of the problem, (ii) whether resistance is increasing, (iii) whether previously unknown types of resistance are emerging, (iv) whether a particular type of resistance is spreading, and (v) whether a particular type of resistance is associated with a particular outbreak. The implications of acquiring and utilizing this information need to be considered in the design of a surveillance system. AMR surveillance provides a foundation for assessing the burden of AMR and for providing the necessary evidence for developing efficient and effective control and prevention strategies. The codevelopment of AMR surveillance programs in humans and animals is essential, but there remain several key elements that make data comparisons between AMR monitoring programs, and between regions, difficult. Currently, AMR surveillance relies on uncomplicated in vitro antimicrobial susceptibility methods. However, the lack of harmonization across programs and the limitation of genetic information of AMR remain the major drawbacks of these phenotypic methods. The future of AMR surveillance is moving toward genotypic detection, and molecular analysis methods are expected to yield a wealth of information. However, the expectation that these molecular techniques will surpass phenotypic susceptibility testing in routine diagnosis and monitoring of AMR remains a distant reality, and phenotypic testing remains necessary in the detection of emerging resistant bacteria, new resistance mechanisms, and trends of AMR.
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16
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Abstract
Optimization of antimicrobial treatment is a cornerstone in the fight against antimicrobial resistance. Various national and international authorities and professional veterinary and farming associations have released generic guidelines on prudent antimicrobial use in animals. However, these generic guidelines need to be translated into a set of animal species- and disease-specific practice recommendations. This article focuses on prevention of antimicrobial resistance and its complex relationship with treatment efficacy, highlighting key situations where the current antimicrobial drug products, treatment recommendations, and practices may be insufficient to minimize antimicrobial selection. The authors address this topic using a multidisciplinary approach involving microbiology, pharmacology, clinical medicine, and animal husbandry. In the first part of the article, we define four key targets for implementing the concept of optimal antimicrobial treatment in veterinary practice: (i) reduction of overall antimicrobial consumption, (ii) improved use of diagnostic testing, (iii) prudent use of second-line, critically important antimicrobials, and (iv) optimization of dosage regimens. In the second part, we provided practice recommendations for achieving these four targets, with reference to specific conditions that account for most antimicrobial use in pigs (intestinal and respiratory disease), cattle (respiratory disease and mastitis), dogs and cats (skin, intestinal, genitourinary, and respiratory disease), and horses (upper respiratory disease, neonatal foal care, and surgical infections). Lastly, we present perspectives on the education and research needs for improving antimicrobial use in the future.
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17
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Toutain PL, Bousquet-Mélou A, Damborg P, Ferran AA, Mevius D, Pelligand L, Veldman KT, Lees P. En Route towards European Clinical Breakpoints for Veterinary Antimicrobial Susceptibility Testing: A Position Paper Explaining the VetCAST Approach. Front Microbiol 2017; 8:2344. [PMID: 29326661 PMCID: PMC5736858 DOI: 10.3389/fmicb.2017.02344] [Citation(s) in RCA: 108] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 11/15/2017] [Indexed: 01/05/2023] Open
Abstract
VetCAST is the EUCAST sub-committee for Veterinary Antimicrobial Susceptibility Testing. Its remit is to define clinical breakpoints (CBPs) for antimicrobial drugs (AMDs) used in veterinary medicine in Europe. This position paper outlines the procedures and reviews scientific options to solve challenges for the determination of specific CBPs for animal species, drug substances and disease conditions. VetCAST will adopt EUCAST approaches: the initial step will be data assessment; then procedures for decisions on the CBP; and finally the release of recommendations for CBP implementation. The principal challenges anticipated by VetCAST are those associated with the differing modalities of AMD administration, including mass medication, specific long-acting product formulations or local administration. Specific challenges comprise mastitis treatment in dairy cattle, the range of species and within species breed considerations and several other variable factors not relevant to human medicine. Each CBP will be based on consideration of: (i) an epidemiological cut-off value (ECOFF) - the highest MIC that defines the upper end of the wild-type MIC distribution; (ii) a PK/PD breakpoint obtained from pre-clinical pharmacokinetic data [this PK/PD break-point is the highest possible MIC for which a given percentage of animals in the target population achieves a critical value for the selected PK/PD index (fAUC/MIC or fT > MIC)] and (iii) when possible, a clinical cut-off, that is the relationship between MIC and clinical cure. For the latter, VetCAST acknowledges the paucity of such data in veterinary medicine. When a CBP cannot be established, VetCAST will recommend use of ECOFF as surrogate. For decision steps, VetCAST will follow EUCAST procedures involving transparency, consensus and independence. VetCAST will ensure freely available dissemination of information, concerning standards, guidelines, ECOFF, PK/PD breakpoints, CBPs and other relevant information for AST implementation. Finally, after establishing a CBP, VetCAST will promulgate expert comments and/or recommendations associated with CBPs to facilitate their sound implementation in a clinical setting.
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Affiliation(s)
- Pierre-Louis Toutain
- UMR 1331 Toxalim, INRA, ENVT, Toulouse, France
- The Royal Veterinary College, University of London, London, United Kingdom
| | | | - Peter Damborg
- Department of Veterinary and Animal Sciences, University of Copenhagen, Frederiksberg, Denmark
| | | | - Dik Mevius
- Wageningen Bioveterinary Research, Lelystad, Netherlands
| | - Ludovic Pelligand
- The Royal Veterinary College, University of London, London, United Kingdom
| | - Kees T. Veldman
- National Reference Laboratory on Antimicrobial Resistance in Animals, Lelystad, Netherlands
| | - Peter Lees
- The Royal Veterinary College, University of London, London, United Kingdom
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18
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Prevalence and antimicrobial susceptibility of Mannheimia haemolytica, Pasteurella multocida, and Histophilus somni isolated from the lower respiratory tract of healthy feedlot cattle and those diagnosed with bovine respiratory disease. Vet Microbiol 2017; 208:118-125. [PMID: 28888626 DOI: 10.1016/j.vetmic.2017.07.013] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 07/11/2017] [Accepted: 07/12/2017] [Indexed: 11/23/2022]
Abstract
Current information on prevalence and antimicrobial resistance (AMR) of bacterial respiratory pathogens is crucial to guide antimicrobial choice for control and treatment of bovine respiratory disease (BRD). The objectives were to describe the prevalence of three BRD-associated bacteria (Mannheimia haemolytica, Pasteurella multocida, and Histophilus somni) in the lower airways of feedlot cattle, and to analyze AMR in these bacteria. Cattle with (n=210) and without (n=107) BRD were sampled by trans-tracheal aspiration at four feedlots (Nov. 15-Jan. 16). These cattle had received 2.5mg/kg of tulathromycin on arrival at the feedlot for BRD control and two in-feed pulses of chlortetracycline (5g/animal/day for 5days) within the first 21days on feed to prevent histophilosis. Bacteria were detected by culture and AMR was tested by microdilution. Pasteurella multocida was the most frequent bacterium isolated in cattle with BRD (54.8%), followed by M. haemolytica (30.5%) and H. somni (22.9%). Compared to those with BRD, healthy cattle were less likely to be positive for P. multocida (OR=0.27), M. haemolytica (OR=0.32), or H. somni (OR=0.25). There were high levels of resistance (>70%) against tulathromycin and oxytetracycline in M. haemolytica and P. multocida isolates and high levels of resistance against oxytetracycline (67%) and penicillin (52%) in H. somni isolates. None or few isolates were resistant to florfenicol, enrofloxacin and ceftiofur. The high prevalence of resistance against tulathromycin and oxytetracycline suggests that these antimicrobials should not be repeatedly used for both control and treatment of BRD and/or histophilosis.
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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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Magalhães LQ, Baptista AL, Fonseca PDA, Menezes GL, Nogueira GM, Headley SA, Fritzen JTT, Alfieri AA, Saut JPE. Use of metaphylactic protocols based on the risk to develop bovine respiratory diseases in feedlot cattle. CIÊNCIA RURAL 2017; 47. [DOI: 10.1590/0103-8478cr20161110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
ABSTRACT: Bovine respiratory diseases (BRD) affect production rates negatively because it compromise health and well-being of the affected animal. The hypothesis of this study was that the use of metaphylactic protocols based on the risk to develop BRD would reduce morbidity and pulmonary lesions. For this purpose, the aims of this study were to evaluate the effect of two metaphylactic protocols on the morbidity of feedlot cattle with a known sanitary history, occurrence of pulmonary lesions at slaughter, and the possible participation of Mannheimia haemolytica, Histophilus somni, Bovine alphaherpesvirus 1 (BoHV-1) and bovine respiratory syncytial virus (BRSV) in the development of BRD. An experimental study was designed in which 3,094 adult, male, cattle, were grouped according to the risk to develop BRD: a) group without metaphylaxis (n=2,104), low-risk animals; b) metaphylaxis group with oxytetracycline (n=789), moderate-risk animals; c) metaphylaxis group with tildipirosin (n=201), high-risk animals. All cattle were immunized against pathogens associated with BRD (BoHV-1, BVDV, BRSV, PI3). The morbidity for BRD was 8.2% (253/3,094); cattle within the moderate-risk group for BRD had the lowest frequency (6.1%), followed by high-risk animals with tildipirosin metaphylaxis (6.5%) and low-risk without metaphylaxis (9.1%) (P=0.019). At the abattoir, 1.2% of lungs with lesions were found. There was a difference (P=0.036) in the frequency of pulmonary lesions between healthy animals (1.1%) and those diagnosed with BRD (2.8%). Two agents associated with BRD were identified by PCR assays in the lungs (n=37) of cattle: M. haemolytica (16.2%) and H. somni (5.4%). In addition, concomitant infections involving these pathogens were identified in the lungs of two steers. These results demonstrate that the use of metaphylactic protocols, based on the risk to develop BRD, reduces morbidity and pulmonary lesions in affected cattle. Furthermore, pulmonary lesions were more frequent in animals with a history of BRD.
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Affiliation(s)
| | | | | | | | | | - Selwyn Arlington Headley
- Universidade Estadual de Londrina (UEL), Brazil; Universidade Estadual de Londrina (UEL), Brazil
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21
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Coyne LA, Latham SM, Williams NJ, Dawson S, Donald IJ, Pearson RB, Smith RF, Pinchbeck GL. Understanding the culture of antimicrobial prescribing in agriculture: a qualitative study of UK pig veterinary surgeons. J Antimicrob Chemother 2016; 71:3300-3312. [PMID: 27516473 PMCID: PMC5079303 DOI: 10.1093/jac/dkw300] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 06/18/2016] [Accepted: 06/24/2016] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVES The use of antimicrobials in food-producing animals has been linked with the emergence of antimicrobial resistance in bacterial populations, with consequences for animal and public health. This study explored the underpinning drivers, motivators and reasoning behind prescribing decisions made by veterinary surgeons working in the UK pig industry. METHODS A qualitative interview study was conducted with 21 veterinary surgeons purposively selected from all UK pig veterinary surgeons. Thematic analysis was used to analyse transcripts. RESULTS Ensuring optimum pig health and welfare was described as a driver for antimicrobial use by many veterinary surgeons and was considered a professional and moral obligation. Veterinary surgeons also exhibited a strong sense of social responsibility over the need to ensure that antimicrobial use was responsible. A close relationship between management practices, health and economics was evident, with improvements in management commonly identified as being potential routes to reduce antimicrobial usage; however, these were not always considered economically viable. The relationship with clients was identified as being a source of professional stress for practitioners due to pressure from farmers requesting antimicrobial prescriptions, and concern over poor compliance of antimicrobial administration by some farmers. CONCLUSIONS The drivers behind prescribing decisions by veterinary surgeons were complex and diverse. A combination of education, improving communication between veterinary surgeons and farmers, and changes in regulations, in farm management and in consumer/retailer demands may all be needed to ensure that antimicrobial prescribing is optimal and to achieve significant reductions in use.
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Affiliation(s)
- L A Coyne
- Department of Epidemiology and Population Health, Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Chester High Road, Neston CH64 7TE, UK
| | - S M Latham
- Department of Epidemiology and Population Health, Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Chester High Road, Neston CH64 7TE, UK
| | - N J Williams
- Department of Epidemiology and Population Health, Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Chester High Road, Neston CH64 7TE, UK
| | - S Dawson
- School of Veterinary Science, Faculty of Health and Life Sciences, University of Liverpool, Leahurst Campus, Chester High Road, Neston CH64 7TE, UK
| | - I J Donald
- Institute of Psychology, Health & Society, University of Liverpool, Bedford Street South, Liverpool L69 7ZA, UK
| | - R B Pearson
- The George Pig Practice, High Street, Malmesbury, Wiltshire SN16 9AU, UK
| | - R F Smith
- School of Veterinary Science, Faculty of Health and Life Sciences, University of Liverpool, Leahurst Campus, Chester High Road, Neston CH64 7TE, UK
| | - G L Pinchbeck
- Department of Epidemiology and Population Health, Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Chester High Road, Neston CH64 7TE, UK
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Apley MD. Treatment of Calves with Bovine Respiratory Disease. Vet Clin North Am Food Anim Pract 2015; 31:441-53, vii. [DOI: 10.1016/j.cvfa.2015.06.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
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