Risk factors associated with exposure to bovine respiratory disease pathogens during the peri-weaning period in dairy bull calves
Abstract Background Bovine respiratory disease (BRD) remains among the leading causes of death of cattle internationally. The objective of this study was to identify risk factors associated with exposure to BRD pathogens during the peri-weaning period (day (d)-14 to d 14 relative to weaning at 0) in...
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| Format: | Article |
| Language: | English |
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BMC
2018-02-01
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| Series: | BMC Veterinary Research |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s12917-018-1372-9 |
| _version_ | 1828877425995415552 |
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| author | Gerard M. Murray Simon J. More Tracy A. Clegg Bernadette Earley Rónan G. O’Neill Dayle Johnston John Gilmore Mikhail Nosov Máire C. McElroy Thomas J. Inzana Joseph P. Cassidy |
| author_facet | Gerard M. Murray Simon J. More Tracy A. Clegg Bernadette Earley Rónan G. O’Neill Dayle Johnston John Gilmore Mikhail Nosov Máire C. McElroy Thomas J. Inzana Joseph P. Cassidy |
| author_sort | Gerard M. Murray |
| collection | DOAJ |
| description | Abstract Background Bovine respiratory disease (BRD) remains among the leading causes of death of cattle internationally. The objective of this study was to identify risk factors associated with exposure to BRD pathogens during the peri-weaning period (day (d)-14 to d 14 relative to weaning at 0) in dairy bull calves using serological responses to these pathogens as surrogate markers of exposure. Clinically normal Holstein-Friesian and Jersey breed bull calves (n = 72) were group housed in 4 pens using a factorial design with calves of different breeds and planes of nutrition in each pen. Intrinsic, management and clinical data were collected during the pre-weaning (d − 56 to d − 14) period. Calves were gradually weaned over 14 days (d − 14 to d 0). Serological analysis for antibodies against key BRD pathogens (BRSV, BPI3V, BHV-1, BHV-4, BCoV, BVDV and H. somni) was undertaken at d − 14 and d 14. Linear regression models (for BVDV, BPI3V, BHV-1, BHV-4, BCoV and H. somni) and a single mixed effect random variable model (for BRSV) were used to identify risk factors for changes in antibody levels to these pathogens. Results BRSV was the only pathogen which demonstrated clustering by pen. Jersey calves experienced significantly lower changes in BVDV S/P than Holstein-Friesian calves. Animals with a high maximum respiratory score (≥8) recorded significant increases in H. somni S/P during the peri-weaning period when compared to those with respiratory scores of ≤3. Haptoglobin levels of between 1.32 and 1.60 mg/ml at d − 14 were significantly associated with decreases in BHV-1 S/N during the peri-weaning period. Higher BVDV S/P ratios at d − 14 were significantly correlated with increased changes in serological responses to BHV-4 over the peri-weaning period. Conclusions Haptoglobin may have potential as a predictor of exposure to BHV-1. BRSV would appear to play a more significant role at the ‘group’ rather than ‘individual animal’ level. The significant associations between the pre-weaning levels of antibodies to certain BRD pathogens and changes in the levels of antibodies to the various pathogens during the peri-weaning period may reflect a cohort of possibly genetically linked ‘better responders’ among the study population. |
| first_indexed | 2024-12-13T08:40:17Z |
| format | Article |
| id | doaj.art-eca803f4a3b746eaaa517d5f239d6367 |
| institution | Directory Open Access Journal |
| issn | 1746-6148 |
| language | English |
| last_indexed | 2024-12-13T08:40:17Z |
| publishDate | 2018-02-01 |
| publisher | BMC |
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| series | BMC Veterinary Research |
| spelling | doaj.art-eca803f4a3b746eaaa517d5f239d63672022-12-21T23:53:33ZengBMCBMC Veterinary Research1746-61482018-02-0114111110.1186/s12917-018-1372-9Risk factors associated with exposure to bovine respiratory disease pathogens during the peri-weaning period in dairy bull calvesGerard M. Murray0Simon J. More1Tracy A. Clegg2Bernadette Earley3Rónan G. O’Neill4Dayle Johnston5John Gilmore6Mikhail Nosov7Máire C. McElroy8Thomas J. Inzana9Joseph P. Cassidy10Sligo Regional Veterinary Laboratory, Department of Agriculture, Food and MarineCentre for Veterinary Epidemiology and Risk Analysis, UCD School of Veterinary Medicine, University College DublinCentre for Veterinary Epidemiology and Risk Analysis, UCD School of Veterinary Medicine, University College DublinAnimal and Bioscience Research Department, Animal & Grassland Research and Innovation CentreCentral Veterinary Research Laboratory, Department of Agriculture, Food and MarineAnimal and Bioscience Research Department, Animal & Grassland Research and Innovation CentreFarmlab Diagnostics, Emlagh LodgeFarmlab Diagnostics, Emlagh LodgeCentral Veterinary Research Laboratory, Department of Agriculture, Food and MarineDepartment of Biomedical Sciences & Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia TechSchool of Veterinary Medicine, University College DublinAbstract Background Bovine respiratory disease (BRD) remains among the leading causes of death of cattle internationally. The objective of this study was to identify risk factors associated with exposure to BRD pathogens during the peri-weaning period (day (d)-14 to d 14 relative to weaning at 0) in dairy bull calves using serological responses to these pathogens as surrogate markers of exposure. Clinically normal Holstein-Friesian and Jersey breed bull calves (n = 72) were group housed in 4 pens using a factorial design with calves of different breeds and planes of nutrition in each pen. Intrinsic, management and clinical data were collected during the pre-weaning (d − 56 to d − 14) period. Calves were gradually weaned over 14 days (d − 14 to d 0). Serological analysis for antibodies against key BRD pathogens (BRSV, BPI3V, BHV-1, BHV-4, BCoV, BVDV and H. somni) was undertaken at d − 14 and d 14. Linear regression models (for BVDV, BPI3V, BHV-1, BHV-4, BCoV and H. somni) and a single mixed effect random variable model (for BRSV) were used to identify risk factors for changes in antibody levels to these pathogens. Results BRSV was the only pathogen which demonstrated clustering by pen. Jersey calves experienced significantly lower changes in BVDV S/P than Holstein-Friesian calves. Animals with a high maximum respiratory score (≥8) recorded significant increases in H. somni S/P during the peri-weaning period when compared to those with respiratory scores of ≤3. Haptoglobin levels of between 1.32 and 1.60 mg/ml at d − 14 were significantly associated with decreases in BHV-1 S/N during the peri-weaning period. Higher BVDV S/P ratios at d − 14 were significantly correlated with increased changes in serological responses to BHV-4 over the peri-weaning period. Conclusions Haptoglobin may have potential as a predictor of exposure to BHV-1. BRSV would appear to play a more significant role at the ‘group’ rather than ‘individual animal’ level. The significant associations between the pre-weaning levels of antibodies to certain BRD pathogens and changes in the levels of antibodies to the various pathogens during the peri-weaning period may reflect a cohort of possibly genetically linked ‘better responders’ among the study population.http://link.springer.com/article/10.1186/s12917-018-1372-9CalvesAntibodiesBovine respiratory diseaseDairyExposure |
| spellingShingle | Gerard M. Murray Simon J. More Tracy A. Clegg Bernadette Earley Rónan G. O’Neill Dayle Johnston John Gilmore Mikhail Nosov Máire C. McElroy Thomas J. Inzana Joseph P. Cassidy Risk factors associated with exposure to bovine respiratory disease pathogens during the peri-weaning period in dairy bull calves BMC Veterinary Research Calves Antibodies Bovine respiratory disease Dairy Exposure |
| title | Risk factors associated with exposure to bovine respiratory disease pathogens during the peri-weaning period in dairy bull calves |
| title_full | Risk factors associated with exposure to bovine respiratory disease pathogens during the peri-weaning period in dairy bull calves |
| title_fullStr | Risk factors associated with exposure to bovine respiratory disease pathogens during the peri-weaning period in dairy bull calves |
| title_full_unstemmed | Risk factors associated with exposure to bovine respiratory disease pathogens during the peri-weaning period in dairy bull calves |
| title_short | Risk factors associated with exposure to bovine respiratory disease pathogens during the peri-weaning period in dairy bull calves |
| title_sort | risk factors associated with exposure to bovine respiratory disease pathogens during the peri weaning period in dairy bull calves |
| topic | Calves Antibodies Bovine respiratory disease Dairy Exposure |
| url | http://link.springer.com/article/10.1186/s12917-018-1372-9 |
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