Data/hora: 18/06/2024 02:10:44

Biblioteca(s): 	Embrapa Gado de Leite.	
Data corrente: 	15/09/2021	
Data da última atualização: 	25/11/2021	
Autoria: 	DINIZ NETO, H. C.; LOMBARDI, N. C.; CAMPOS, M. M.; LAGE, A. P.; SILVA, R. O. S.; DORNELES, E. M. S.; LAGE, C. F. A.; CARVALHO, W. A.; MACHADO, F. S.; PEREIRA, L. G. R.; TOMICH, T. R.; RAMOS, C. P.; ASSIS, R. A.; LOBATO, F. C. F.; SANTANA, J. A.; SANTOS, E. L. S.; ANDRADE, R. S.; COELHO, S. G.	
Afiliação: 	HILTON C. DINIZ NETO, Universidade Federal de Minas Gerais; MAYARA C. LOMBARDI, Universidade Federal de Minas Gerais; MARIANA MAGALHAES CAMPOS, CNPGL; ANDREY P. LAGE, Universidade Federal de Minas Gerais; RODRIGO O. S. SILVA, Universidade Federal de Minas Gerais; ELAINE MARIA SELES DORNELES, Universidade Federal de Lavras; CAMILA FLÁVIA A. LAGE, Universidade Federal de Minas Gerais; WANESSA ARAUJO CARVALHO, CNPGL; FERNANDA SAMARINI MACHADO, CNPGL; LUIZ GUSTAVO RIBEIRO PEREIRA, CNPGL; THIERRY RIBEIRO TOMICH, CNPGL; CAROLINA P. RAMOS, Universidade Federal de Minas Gerais; RONNIE A. ASSIS, Universidade Federal de Minas Gerais; FRANCISCO CARLOS F. LOBATO, Universidade Federal de Minas Gerais; JORDANA A. SANTANA, Universidade Federal de Minas Gerais; ETHIENE LUIZA S. SANTOS, Universidade Federal de Minas Gerais; RAFAELLA S. ANDRADE, Universidade Federal de Lavras; SANDRA G. COELHO, Universidade Federal de Minas Gerais.	
Título: 	Effects of vaccination against brucellosis and clostridia on the intake, performance, feeding behavior, blood parameters, and immune responses of dairy heifers calves.	
Ano de publicação: 	2021	
Fonte/Imprenta: 	Journal of Animal Science, v. 99, n. 5, skab107, 2021.	
DOI: 	https://doi.org/10.1093/jas/skab107	
Idioma: 	Inglês	
Conteúdo: 	The aim of this study was to identify possible effects of different vaccination strategies (concomitantly or not) against brucellosis and clostridia on intake, performance, feeding behavior, blood parameters, and immune responses of dairy heifers calves. Fifty heifers calves were enrolled [38 Gyr (Zebu, Bos taurus indicus) and 12 5/8 Holstein × Gyr]. At 120 d of age, animals were randomly distributed among 3 groups: B (n = 18), vaccinated against brucellosis; C (n = 14), vaccinated against clostridia and CB (n = 18), vaccinated concomitantly for both. Rectal and thermographic temperatures were evaluated on days ?1, 0, 1, 2, 3, 5, 7,10, 14, and 28 relatives to the vaccination day. Feed and water intake, body weight (BW), and feeding behavior were monitored daily by an electronic feeding system. Blood was sampled on days 0, 3, 7, 14, and 28, relative to the vaccination day for determination of glucose and ? -hydroxybutyrate (BHBA) concentrations. Blood sampled on day 0 (prevaccination) and on days 28 and 42 were used to evaluate the immune response against Brucella abortus and clostridia. There was an increase in rectal temperature between the first and the third day postvaccination in the 3 groups. The thermography revealed an increase of local temperature for 7 d on groups B and CB. Group C had increased local temperature for a longer period, lasting for up to 14 d. Dry mater intake was reduced for groups B and CB, but no alteration was observed for group C. No alterations regarding initial BW, final BW, average daily weight gain, and feed efficiency were observed. No differences were observed for the 3 vaccination groups for blood parameters throughout the evaluation period. The concomitant vaccination against brucellosis and clostridia led to lower neutralizing antibody titers against epsilon toxin of Clostridium perfringens and botulinum toxin type C of C. botulinum (C > CB > B). When cellular proliferation assay and serological tests to B. abortus were evaluated, no differences were observed between groups B and CB. The present results indicate that the concomitant vaccination against brucellosis and clostridia has no relevant impact on the intake, performance, and feeding behavior of dairy calves. However, the concomitant vaccination of vaccines against these 2 pathogens impacts animal immunity against clostridial infections.	
Palavras-Chave: 	Intake.	
Thesagro: 	Bezerro; Bovino; Brucella Abortus; Brucelose; Clostridium Botulinum; Clostridium Perfringens; Ingestão; Vacinação.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
Registro original: 	Embrapa Gado de Leite (CNPGL)	
Exemplares: 	CNPGL - (25301-1) - UPC - AP - DD -  -  -  - DIS