Vaccination of maternally immune pigs with a live Aujeszky's disease vaccine by coarse spray and other routes.
33 ten weeks old passively immune weaners were inoculated with live, attenuated Aujeszky's disease (AD) vaccine, according to four different vaccination protocols: (groups A/A2) 3 x coarse spray vaccination at 10, 11 and 13 weeks of age, (groups B/B2) 1 x coarse spray at 10 weeks of age followed by 1 x intramuscularly at 13 weeks, (C) 1 x intranasal instillation at 10 weeks of age, and (groups D/D2) 2 x intramuscularly at 10 and 13 weeks of age. A further 10 weaners were included as unvaccinated controls (E/E2). Spray vaccination was technically simple to perform but on average, 20% of subjects were reluctant to expose themselves to the spray. Clinical reactions were absent apart from mild fever in one pig from group B. Weight gains between 10 and 17 weeks of age were slightly lower in group A and group B weaners, compared to control unvaccinated pigs and pigs vaccinated by other routes. Virus neutralising (VN) antibody response was extremely uneven between individuals in groups A and B. Group D pigs vaccinated 2 x intramuscularly showed a 3 week lag in developing high levels of antibody but the intramuscular route, as well vaccination by intransal instillation, proved to be the most dependable technique for inducing uniformly high levels of VN antibody. Challenge with virulent ADV at 17 weeks of age resulted in death from Aujeszky's disease of all five control pigs. One pig in group A which had no VN antibody, also died. All other pigs were protected against death.(ABSTRACT TRUNCATED AT 250 WORDS)
Chong
Y C
YC
City Veterinary Laboratories, Jalan Seranggong Kechil, Singapore.
Ng
F K
FK
D000280:Administration, Inhalation; D000281:Administration, Intranasal; D000336:Aerosols; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D011558:Herpesvirus 1, Suid / Q000276:immunology*; D007112:Immunity, Maternally-Acquired; D007117:Immunization, Secondary / Q000379:methods / Q000662:veterinary; D007273:Injections, Intramuscular / Q000662:veterinary; D011557:Pseudorabies / Q000517:prevention & control*; D012044:Regression Analysis; D013552:Swine; D013553:Swine Diseases / Q000517:prevention & control*; D014611:Vaccination / Q000379:methods / Q000662:veterinary*; D014613:Vaccines, Attenuated / Q000008:administration & dosage / Q000009:adverse effects; D014765:Viral Vaccines / Q000008:administration & dosage* / Q000009:adverse effects; D015430:Weight Gain / Q000187:drug effects
D000336:Aerosols; D000914:Antibodies, Viral; D014613:Vaccines, Attenuated; D014765:Viral Vaccines