An investigation for seasonal trends in bovine leukemia virus infection

Mark Thurmond, R. L. Carter, M. J. Burridge

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Monthly incidence rates for the detection of bovine leukemia virus (BLV) infection were calculated for a 15-month period for cattle over 12 months of age in a 200-cow dairy herd. Detection of BLV infection was based on the presence of persisting antibodies as measured by agar-gel immunodiffusion using the glycoprotein-51 antigen. A non-parametric procedure was used to examine 6-month trends in cumulative monthly incidence rates. Over the 15-month study, 25 heifers were detected as becoming infected with BLV after 12 months of age. No differences were found between the 12 monthly incidence rates (p = 0.77). Cumulative incidence rates between June and September (the fly season) were not higher than those for any other 6-month period (p = 0.29). Similarly, there was no evidence that BLV infection was transmitted during artificial insemination (p = 0.18) or during routine vaccination procedures (p = 1.0). Cumulative rates for a period corresponding to exposure of heifers to the dry herd were excessively high (p = 0.01). These findings suggest that transmission of BLV infection in the cattle studied was associated with close physical contact between susceptible and infected cattle, and not with biting flies, artificial insemination, or vaccination procedures.

Original languageEnglish (US)
Pages (from-to)115-123
Number of pages9
JournalPreventive Veterinary Medicine
Volume1
Issue number2
DOIs
StatePublished - Jan 1 1983
Externally publishedYes

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Bovine Leukemia Virus
Bovine leukemia virus
Virus Diseases
incidence
Artificial Insemination
infection
Incidence
Diptera
artificial insemination
Vaccination
heifers
cattle
vaccination
Immunodiffusion
hematophagous insects
Agar
Glycoproteins
dairy herds
Gels
glycoproteins

ASJC Scopus subject areas

  • Food Animals
  • Animal Science and Zoology

Cite this

An investigation for seasonal trends in bovine leukemia virus infection. / Thurmond, Mark; Carter, R. L.; Burridge, M. J.

In: Preventive Veterinary Medicine, Vol. 1, No. 2, 01.01.1983, p. 115-123.

Research output: Contribution to journalArticle

Thurmond, Mark ; Carter, R. L. ; Burridge, M. J. / An investigation for seasonal trends in bovine leukemia virus infection. In: Preventive Veterinary Medicine. 1983 ; Vol. 1, No. 2. pp. 115-123.
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