Mortality of live export cattle on long-haul voyages: pathologic changes and pathogens

Moore, S. Jo, O'Dea, Mark A., Perkins, Nigel, Barnes, Anne and O'Hara, Amanda J. (2014) Mortality of live export cattle on long-haul voyages: pathologic changes and pathogens. Journal of Veterinary Diagnostic Investigation, 26 2: 252-265. doi:10.1177/1040638714522465

Author Moore, S. Jo
O'Dea, Mark A.
Perkins, Nigel
Barnes, Anne
O'Hara, Amanda J.
Title Mortality of live export cattle on long-haul voyages: pathologic changes and pathogens
Journal name Journal of Veterinary Diagnostic Investigation   Check publisher's open access policy
ISSN 1040-6387
Publication date 2014-03
Sub-type Article (original research)
DOI 10.1177/1040638714522465
Open Access Status Not Open Access
Volume 26
Issue 2
Start page 252
End page 265
Total pages 14
Place of publication Thousand Oaks, CA United States
Publisher Sage Publications
Language eng
Formatted abstract
The cause of death in 215 cattle on 20 long-haul live export voyages from Australia to the Middle East, Russia, and China was investigated between 2010 and 2012 using gross, histologic, and/or molecular pathology techniques. A quantitative reverse transcription polymerase chain reaction (qRT-PCR) assay was used to detect nucleic acids from viruses and bacteria known to be associated with respiratory disease in cattle: Bovine coronavirus (Betacoronavirus 1), Bovine herpesvirus 1, Bovine viral diarrhea virus 1 and 2, Bovine respiratory syncytial virus, Bovine parainfluenza virus 3, Histophilus somni, Mycoplasma bovis, Mannheimia haemolytica, and Pasteurella multocida. The most commonly diagnosed cause of death was respiratory disease (107/180, 59.4%), followed by lameness (n = 22, 12.2%), ketosis (n = 12, 6.7%), septicemia (n = 11, 6.1%), and enteric disease (n = 10, 5.6%). Two thirds (130/195) of animals from which lung samples were collected had histologic changes and/or positive qRT-PCR results indicative of infectious lung disease: 93 out of 130 (72%) had evidence of bacterial infection, 4 (3%) had viral infection, and 29 (22%) had mixed bacterial and viral infections, and for 4 (3%) the causative organism could not be identified. Bovine coronavirus was detected in up to 13% of cattle tested, and this finding is likely to have important implications for the management and treatment of respiratory disease in live export cattle. Results from the current study indicate that although overall mortality during live export voyages is low, further research into risk factors for developing respiratory disease is required.
Keyword Bovine coronavirus
Bovine herpesvirus 1
Bovine parainfluenza virus 3
Bovine respiratory disease
Bovine respiratory syncytial virus
Bovine viral diarrhea virus
Histophilus somni
Live export
Mannheimia haemolytica
Mycoplasma bovis
Pasteurella multocida
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Veterinary Science Publications
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Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 30 Mar 2016, 17:23:34 EST by Nigel Perkins on behalf of School of Veterinary Science