Serologic survey of prevalence of ovine progressive pneumonia in Idaho range sheep

Blood samples from 2,310 mature sheep in 3 Idaho range flocks were examined by agar gel immunodiffusion to determine the prevalence of ovine progressive pneumonia. The prevalence ranged from 58% for all ages combined in one flock to 90% of cull ewes in another flock. Age-specific prevalence rates in...

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Bibliographic Details
Published inJournal of the American Veterinary Medical Association Vol. 173; no. 12; p. 1575
Main Authors Gates, N L, Winward, L D, Gorham, J R, Shen, D T
Format Journal Article
LanguageEnglish
Published United States 15.12.1978
Subjects
Animals
Antibodies, Viral - analysis
Idaho
Immunodiffusion
Pneumonia, Progressive Interstitial, of Sheep - epidemiology
Pneumonia, Progressive Interstitial, of Sheep - immunology
Sheep
Visna-maedi virus - immunology
Idaho
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Summary:Blood samples from 2,310 mature sheep in 3 Idaho range flocks were examined by agar gel immunodiffusion to determine the prevalence of ovine progressive pneumonia. The prevalence ranged from 58% for all ages combined in one flock to 90% of cull ewes in another flock. Age-specific prevalence rates increased from 16% in yearlings to 83% in ewes greater than or equal to 7 years old. Rambouillet sheep had a significantly (P less than 0.01) lower prevalence than sheep of 5 other breeds, whereas one-half Finnsheep crosses had a significantly (P less than 0.01) higher prevalence than sheep of other breeds. Within breed and age, there was no significant difference in reproductive performance between seropositive and seronegative ewes.
ISSN:0003-1488