Banca de QUALIFICAÇÃO: RODRIGO DE MORAIS

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : RODRIGO DE MORAIS
DATE: 23/01/2025
TIME: 08:00
LOCAL: Plataforma Google meet
TITLE:

REPRODUCTIVE PERFORMANCE OF FEMALE BEEF CATTLE DURING A VACCINATION PROGRAM CONTAINING INACTIVATED STRAINS AGAINST IBR, BVD, LEPTOSPIROSIS AND CAMPYLOBACTERIOSIS

KEY WORDS:

Pregnancy, pregnancy loss, reproductive diseases; vaccine; beef cattle females.

PAGES: 102
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUBÁREA: Reprodução Animal
SUMMARY:

The objectives of this study were to evaluate the influence of the vaccination program against reproductive diseases on reproductive performance: conception rate, pregnancy losses and birth rate, in addition to serological mapping of IBR, BVD and Leptospirosis. A total of 736 zebu or crossbred females (Bos indicus x Bos taurus) were divided into cows (n = 503; ECC = 2.9 ± 0.02) and heifers (n = 223; ECC = 2.5 ± 0.01), each category was subdivided into 2 groups, control and vaccinated. Blood collections were performed 30 days before the IATF protocol, together with the application of the vaccine containing inactivated antigens of IBR, BVD, leptospirosis and campylobacteriosis, which was repeated on D0 of the IATF protocol. The initial pregnancy diagnosis was performed by ultrasonography 28 to 30 days after the TAI and repeated at 120 days by transrectal palpation, together with the application of a vaccine containing Leptospira spp. antigens, which was repeated approximately 90 days later. Pregnancy rates at 30 and 120 days and pregnancy loss at the first TAI did not differ between the vaccinated and control groups or between categories. For the second TAI, cows had a higher pregnancy rate than heifers at 30 and 120 days (P > 0.05), but there was no effect between treatments. A lower pregnancy loss was observed for the vaccinated group at the second TAI (P > 0.05), with no effect between categories. The cumulative pregnancy rate was not affected by treatment or category. In short, the use of reproductive vaccines with inactivated strains does not affect the pregnancy rate in IATF and is effective in reducing pregnancy losses in beef cattle.

COMMITTEE MEMBERS:
Presidente - 2368419 - BRUNO MOURA MONTEIRO
Interno - ***.305.370-** - LUIZ FRANCISCO MACHADO PFEIFER - EMBRAPA
Externo à Instituição - ALYSON JORGE DE OLIVEIRA SOUSA - IFPA
Externo à Instituição - DIEGO ANDRES VELASCO ACOSTA