EVALUATION SOROLOGIC COMPARED BETWEEN TWO VACCINATION SCHEMES AGAINST B.I.D. (BURSA INFECTED DISEASE)

ABSTRACT

The B.I.D. (Bursa infected diseases) is the viral etiology infecting chickens range 3-6 weeks of age. The Fabricius bursa is the target organ of this virus. The passive immunity is transmitted by the female to the offspring protecting from early infections. Trough sorologic analysis of different schemes of vaccination and necessity of vaccination against B.I.D. on the first day of age, 20 batches of chicks, with 20 chicks in each, were evaluated. In the incubatory 10 batches were vaccinated and 10 others were not. On the first day of age we evaluated the mother antibody titles and on the tenth day we evaluated anti-body titles. The analysis were done through ELISA. Considering the similar ages of the parental, we observed similar parameters of titles of anti-body in both batches, on the first day of age. On the tenth day of age the titles of anti-body were seduced by the same amount, no significative changes were observed between them. Therefore we concluded that high titles of passive immunity make it unnecessary vaccination of chicks on the first day of age.

KEY WORDS:
Poultry; gumboro; vaccination; immunity.