Recovery of dual serotypes of bluetongue virus from infected sheep and cattle

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Abstract

Dual serotypes of bluetongue virus (BTV) were recovered from field-collected samples of sheep and cattle blood. Two sheep, each infected with both BTV serotypes 10 and 17, were found in a flock with bluetongue disease associated with these two serotypes. One sheep infected with BTV serotypes 11 and 17 was found in a second flock; it was the only viremic sheep detected and was clinically ill. Dual serotype infections of one beef and two dairy cattle were found in three geographically separate herds; mixtures recovered were of BTV serotypes 10 and 17 and serotypes 11 and 17. Clinical signs of illness were absent in the cattle in two herds, but severe conjuctivitis was seen in several cows in a third herd, including the cow with a dual serotype infection (BTV 11 and 17). Two of the cattle with dual infections had no serological evidence of BTV as determined by the agar gel precipitin test; serum was not available from the other cow with a dual serotype infection. The significance of dual infections and immune tolerance are discussed.

Original languageEnglish (US)
Pages (from-to)197-207
Number of pages11
JournalVeterinary Microbiology
Volume7
Issue number3
DOIs
StatePublished - 1982

Fingerprint

Bluetongue virus
Sheep
serotypes
sheep
cattle
Infection
infection
herds
cows
flocks
Precipitin Tests
Bluetongue
precipitin tests
Serogroup
Immune Tolerance
bluetongue
immunosuppression
blood serum
Agar
dairy cattle

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Microbiology
  • veterinary(all)

Cite this

Recovery of dual serotypes of bluetongue virus from infected sheep and cattle. / Stott, Jeffrey L; Osburn, Bennie; Barber, T. L.

In: Veterinary Microbiology, Vol. 7, No. 3, 1982, p. 197-207.

Research output: Contribution to journalArticle

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AB - Dual serotypes of bluetongue virus (BTV) were recovered from field-collected samples of sheep and cattle blood. Two sheep, each infected with both BTV serotypes 10 and 17, were found in a flock with bluetongue disease associated with these two serotypes. One sheep infected with BTV serotypes 11 and 17 was found in a second flock; it was the only viremic sheep detected and was clinically ill. Dual serotype infections of one beef and two dairy cattle were found in three geographically separate herds; mixtures recovered were of BTV serotypes 10 and 17 and serotypes 11 and 17. Clinical signs of illness were absent in the cattle in two herds, but severe conjuctivitis was seen in several cows in a third herd, including the cow with a dual serotype infection (BTV 11 and 17). Two of the cattle with dual infections had no serological evidence of BTV as determined by the agar gel precipitin test; serum was not available from the other cow with a dual serotype infection. The significance of dual infections and immune tolerance are discussed.

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