Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Aetiological role of adenoviruses in the calf respiratory syndrome.

Abstract

In studies on 819 calves of five age categories (0-7, 7-25, 24-45, 45-70, and 70-105 days old) with respiratory symptoms on six farms in the period 1984-1986, nasal and rectal swabs were examined by the indirect fluorescent antibody staining techniques, and complement fixation and neutralization tests were carried out on serum samples. Adenovirus type 1 was detected in 193 (47%) of 410 nasal swabs and in 54 (12%) of 462 rectal swabs; there were no positive reactions in animals less than seven days of age. Serum neutralization tests with adenovirus type 1 were positive in 21 (27%) of 82 calves on farm I, while in CF tests on 30 calves on farm III there were positive reactions for adenoviruses types 1, 4 and 7 in 9, 2 and 0 calves, respectively. Adenoviruses of types 1, 4 and 7 were isolated from both farms I and III.