Antibody titers to pseudorabies virus in piglets immunized with gIII deleted pseudorabies vaccine in a pseudorabies infected herd.
Vet Microbiol
; 42(4): 341-8, 1994 Dec.
Article
en En
| MEDLINE
| ID: mdl-9133059
ABSTRACT
The decrease in titer of PRV antibodies in serum was evaluated at 10, 37, 67, 109 and 173 days of age in 16 non-vaccinated pigs and 43 pigs vaccinated at 3, 67 and 80 days of age with a modified live TK/gIII gene deleted pseudorabies virus (PRV) vaccine. Serum samples were analyzed for antibodies to PRV by the serum-virus neutralization test (SN), a commercial competitive ELISA (CELISA), and the CELISA OMNIMARK PRV differential (OMD) diagnostic kit. At 10 days of age, all pigs had SN titers > or = 14 and were CELISA+/OMD+, indicating circulating antibodies to field strains of PRV. At 109 days, all non-vaccinated pigs had SN titers < 14. Forty-five percent of vaccinated pigs had SN titers > or = 14, 56% were CELISA positive and most were CELISA+/OMD-, indicating antibodies due to vaccination. At 24 weeks of age, all pigs had SN titers > or = 14 and were CELISA+/OMD+ due to exposure to field strains. Although circulating maternal antibodies interfere with the development of active immunity, vaccination at 3 days of age resulted in detectable antibodies by 67 days of age, and a limited immune response could be measured at 109 days of age.
Buscar en Google
Banco de datos:
MEDLINE
Asunto principal:
Seudorrabia
/
Enfermedades de los Porcinos
/
Vacunas Virales
/
Herpesvirus Suido 1
/
Anticuerpos Antivirales
Límite:
Animals
Idioma:
En
Revista:
Vet Microbiol
Año:
1994
Tipo del documento:
Article