Field evaluation of chicken egg yolk immunoglobulins specific for bovine rotavirus in neonatal calves
1997
Kuroki, M. | Ohta, M. | Ikemori, Y. | Icatlo, F. C., Jr | Kobayashi, C. | Yokoyama, H. | Kodama, Y.
The oral efficacy of chicken egg yolk immunoglobulins (yIg) specific for bovine rotavirus (BRV) serotypes G6 and G10 in protecting neonatal calves was examined in a herd of cattle under field conditions. In one of the three trials, yIg-treated calves tested under high relative humidity (RH) showed a significantly increased mean body weight (P<0.05) and a decrease in number of calves shedding high titer of BRV (G6) in stool compared to control calves (P<0.01), suggesting that our yIg product was effective in a field condition with an epidemic outbreak of BRV diarrhea.
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