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Murray GM, More SJ, Sammin D, Casey MJ, McElroy MC, O'Neill RG, Byrne WJ, Earley B, Clegg TA, Ball H, Bell CJ, Cassidy JP. Pathogens, patterns of pneumonia, and epidemiologic risk factors associated with respiratory disease in recently weaned cattle in Ireland. J Vet Diagn Invest 2017; 29:20-34. [PMID: 28074713 DOI: 10.1177/1040638716674757] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
We examined the pathogens, morphologic patterns, and risk factors associated with bovine respiratory disease (BRD) in 136 recently weaned cattle ("weanlings"), 6-12 mo of age, that were submitted for postmortem examination to regional veterinary laboratories in Ireland. A standardized sampling protocol included routine microbiologic investigations as well as polymerase chain reaction and immunohistochemistry. Lungs with histologic lesions were categorized into 1 of 5 morphologic patterns of pneumonia. Fibrinosuppurative bronchopneumonia (49%) and interstitial pneumonia (48%) were the morphologic patterns recorded most frequently. The various morphologic patterns of pulmonary lesions suggest the involvement of variable combinations of initiating and compounding infectious agents that hindered any simple classification of the etiopathogenesis of the pneumonias. Dual infections were detected in 58% of lungs, with Mannheimia haemolytica and Histophilus somni most frequently recorded in concert. M. haemolytica (43%) was the most frequently detected respiratory pathogen; H. somni was also shown to be frequently implicated in pneumonia in this age group of cattle. Bovine parainfluenza virus 3 (BPIV-3) and Bovine respiratory syncytial virus (16% each) were the viral agents detected most frequently. Potential respiratory pathogens (particularly Pasteurella multocida, BPIV-3, and H. somni) were frequently detected (64%) in lungs that had neither gross nor histologic pulmonary lesions, raising questions regarding their role in the pathogenesis of BRD. The breadth of respiratory pathogens detected in bovine lungs by various detection methods highlights the diagnostic value of parallel analyses in respiratory disease postmortem investigation.
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Affiliation(s)
- Gerard M Murray
- Sligo Regional Veterinary Laboratory, Department of Agriculture, Food and Marine, Doonally, Sligo, Ireland (Murray).,School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland (Cassidy, More, Clegg).,Central Veterinary Research Laboratory, Department of Agriculture, Food and Marine, Celbridge, Co. Kildare, Ireland (O'Neill, Sammin, Casey, Byrne, McElroy).,Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Dunsany, Grange, Co. Meath, Ireland (Earley).,Agri-food and Biosciences Institute, Veterinary Sciences Division, Stormont, Belfast, Northern Ireland (Ball, Bell)
| | - Simon J More
- Sligo Regional Veterinary Laboratory, Department of Agriculture, Food and Marine, Doonally, Sligo, Ireland (Murray).,School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland (Cassidy, More, Clegg).,Central Veterinary Research Laboratory, Department of Agriculture, Food and Marine, Celbridge, Co. Kildare, Ireland (O'Neill, Sammin, Casey, Byrne, McElroy).,Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Dunsany, Grange, Co. Meath, Ireland (Earley).,Agri-food and Biosciences Institute, Veterinary Sciences Division, Stormont, Belfast, Northern Ireland (Ball, Bell)
| | - Dónal Sammin
- Sligo Regional Veterinary Laboratory, Department of Agriculture, Food and Marine, Doonally, Sligo, Ireland (Murray).,School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland (Cassidy, More, Clegg).,Central Veterinary Research Laboratory, Department of Agriculture, Food and Marine, Celbridge, Co. Kildare, Ireland (O'Neill, Sammin, Casey, Byrne, McElroy).,Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Dunsany, Grange, Co. Meath, Ireland (Earley).,Agri-food and Biosciences Institute, Veterinary Sciences Division, Stormont, Belfast, Northern Ireland (Ball, Bell)
| | - Mìcheàl J Casey
- Sligo Regional Veterinary Laboratory, Department of Agriculture, Food and Marine, Doonally, Sligo, Ireland (Murray).,School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland (Cassidy, More, Clegg).,Central Veterinary Research Laboratory, Department of Agriculture, Food and Marine, Celbridge, Co. Kildare, Ireland (O'Neill, Sammin, Casey, Byrne, McElroy).,Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Dunsany, Grange, Co. Meath, Ireland (Earley).,Agri-food and Biosciences Institute, Veterinary Sciences Division, Stormont, Belfast, Northern Ireland (Ball, Bell)
| | - Máire C McElroy
- Sligo Regional Veterinary Laboratory, Department of Agriculture, Food and Marine, Doonally, Sligo, Ireland (Murray).,School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland (Cassidy, More, Clegg).,Central Veterinary Research Laboratory, Department of Agriculture, Food and Marine, Celbridge, Co. Kildare, Ireland (O'Neill, Sammin, Casey, Byrne, McElroy).,Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Dunsany, Grange, Co. Meath, Ireland (Earley).,Agri-food and Biosciences Institute, Veterinary Sciences Division, Stormont, Belfast, Northern Ireland (Ball, Bell)
| | - Rónan G O'Neill
- Sligo Regional Veterinary Laboratory, Department of Agriculture, Food and Marine, Doonally, Sligo, Ireland (Murray).,School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland (Cassidy, More, Clegg).,Central Veterinary Research Laboratory, Department of Agriculture, Food and Marine, Celbridge, Co. Kildare, Ireland (O'Neill, Sammin, Casey, Byrne, McElroy).,Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Dunsany, Grange, Co. Meath, Ireland (Earley).,Agri-food and Biosciences Institute, Veterinary Sciences Division, Stormont, Belfast, Northern Ireland (Ball, Bell)
| | - William J Byrne
- Sligo Regional Veterinary Laboratory, Department of Agriculture, Food and Marine, Doonally, Sligo, Ireland (Murray).,School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland (Cassidy, More, Clegg).,Central Veterinary Research Laboratory, Department of Agriculture, Food and Marine, Celbridge, Co. Kildare, Ireland (O'Neill, Sammin, Casey, Byrne, McElroy).,Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Dunsany, Grange, Co. Meath, Ireland (Earley).,Agri-food and Biosciences Institute, Veterinary Sciences Division, Stormont, Belfast, Northern Ireland (Ball, Bell)
| | - Bernadette Earley
- Sligo Regional Veterinary Laboratory, Department of Agriculture, Food and Marine, Doonally, Sligo, Ireland (Murray).,School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland (Cassidy, More, Clegg).,Central Veterinary Research Laboratory, Department of Agriculture, Food and Marine, Celbridge, Co. Kildare, Ireland (O'Neill, Sammin, Casey, Byrne, McElroy).,Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Dunsany, Grange, Co. Meath, Ireland (Earley).,Agri-food and Biosciences Institute, Veterinary Sciences Division, Stormont, Belfast, Northern Ireland (Ball, Bell)
| | - Tracy A Clegg
- Sligo Regional Veterinary Laboratory, Department of Agriculture, Food and Marine, Doonally, Sligo, Ireland (Murray).,School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland (Cassidy, More, Clegg).,Central Veterinary Research Laboratory, Department of Agriculture, Food and Marine, Celbridge, Co. Kildare, Ireland (O'Neill, Sammin, Casey, Byrne, McElroy).,Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Dunsany, Grange, Co. Meath, Ireland (Earley).,Agri-food and Biosciences Institute, Veterinary Sciences Division, Stormont, Belfast, Northern Ireland (Ball, Bell)
| | - Hywel Ball
- Sligo Regional Veterinary Laboratory, Department of Agriculture, Food and Marine, Doonally, Sligo, Ireland (Murray).,School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland (Cassidy, More, Clegg).,Central Veterinary Research Laboratory, Department of Agriculture, Food and Marine, Celbridge, Co. Kildare, Ireland (O'Neill, Sammin, Casey, Byrne, McElroy).,Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Dunsany, Grange, Co. Meath, Ireland (Earley).,Agri-food and Biosciences Institute, Veterinary Sciences Division, Stormont, Belfast, Northern Ireland (Ball, Bell)
| | - Colin J Bell
- Sligo Regional Veterinary Laboratory, Department of Agriculture, Food and Marine, Doonally, Sligo, Ireland (Murray).,School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland (Cassidy, More, Clegg).,Central Veterinary Research Laboratory, Department of Agriculture, Food and Marine, Celbridge, Co. Kildare, Ireland (O'Neill, Sammin, Casey, Byrne, McElroy).,Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Dunsany, Grange, Co. Meath, Ireland (Earley).,Agri-food and Biosciences Institute, Veterinary Sciences Division, Stormont, Belfast, Northern Ireland (Ball, Bell)
| | - Joseph P Cassidy
- Sligo Regional Veterinary Laboratory, Department of Agriculture, Food and Marine, Doonally, Sligo, Ireland (Murray).,School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland (Cassidy, More, Clegg).,Central Veterinary Research Laboratory, Department of Agriculture, Food and Marine, Celbridge, Co. Kildare, Ireland (O'Neill, Sammin, Casey, Byrne, McElroy).,Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Dunsany, Grange, Co. Meath, Ireland (Earley).,Agri-food and Biosciences Institute, Veterinary Sciences Division, Stormont, Belfast, Northern Ireland (Ball, Bell)
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