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Article Information:
Bovine Herpesvirus-4, A Potential Cause of Mastitis in Canadian Dairy Cows
H. Ali, G.P. Keefe and A. Cepica
Corresponding Author: Haythm Ali
Submitted: 2011 August, 30
Accepted: 2011 October, 07
Published: 2011 December, 20 |
Abstract:
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Bovine herpesvirus-4 (BHV-4), genus Rhadinovirus, is a member of the family Herpesviridae,
subfamily Gammaherpesvirinae with a worldwide distribution. This study was conducted to investigate the role
of the virus in mastitis and/or subclinical mastitis in the Canadian dairy herds.Milk samples from 176 dairy
cows were divided into 2 main groups; “A” contained samples with no bacterial isolates, and “B” containing
samples either with Staphylococcus aureus or Streptococcus uberisisolates. Approximatelyninety-eight
percentages of milk samples had antibodies against BHV-4. Among cows with negative bacterial milk cultures,
significantly higher titres of BHV-4 antibodies were associated with samples which had high Somatic Cell
Counts (SCC), compared to low SCC samples. Viral DNA was detected in 2% of milks samples by the
PCR amplification of BHV-4 glycoprotein-B gene. To our knowledge, this is the first report of the presence
of BHV-4 in milk of Canadian dairy herds. Further investigation is needed to determine whether BHV-4 is one
of primary causative agents in bovine mastitis, or whether the observed correlation of high titres of specific milk
BHV-4 antibody with high SCC was due to reactivation of latent BHV-4 infections by primary bacterial insults.
Key words: Antibodies, BHV-4, mastitis, PCR, virus, ,
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Cite this Reference:
H. Ali, G.P. Keefe and A. Cepica, . Bovine Herpesvirus-4, A Potential Cause of Mastitis in Canadian Dairy Cows. British Journal of Dairy Sciences, (3): 31-34.
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ISSN (Online): 2044-2440
ISSN (Print): 2044-2432 |
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