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1 January 2004 Cold-Adapted Strain of Avian Pneumovirus as a Vaccine in One-Day-Old Turkeys and the Effect of Inoculation Routes
Devi P. Patnayak, Sagar M. Goyal
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Abstract

To determine the optimum route of vaccination, we inoculated 1-day-old turkeys with a cold-adapted strain of avian pneumovirus (APV) by oculonasal, oral, or aerosol route. Another two groups served as nonvaccinated-challenged and nonvaccinated-nonchallenged groups. Birds in all vaccinated and nonvaccinated-challenged groups were challenged with virulent APV 3 wk postvaccination. After challenge, no vaccinated bird developed clinical signs or virus shedding, whereas nonvaccinated-challenged birds developed clinical signs (clinical score = 11.2/bird) and shed virus from their choanal cleft. Birds in all three vaccinated groups seroconverted at 3 wk postvaccination. The nonvaccinated-nonchallenged group remained free of clinical signs and virus shedding and did not develop APV antibodies throughout the course of the study. These results suggest that this cold-adapted strain of APV is safe and effective in 1-day-old turkeys when given by any of the three routes.

Devi P. Patnayak and Sagar M. Goyal "Cold-Adapted Strain of Avian Pneumovirus as a Vaccine in One-Day-Old Turkeys and the Effect of Inoculation Routes," Avian Diseases 48(1), 155-159, (1 January 2004). https://doi.org/10.1637/7097
Received: 7 August 2003; Published: 1 January 2004
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