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Longitudinal study of bovine rotavirus group A in newborn calves from vaccinated and unvaccinated dairy herds.
Rocha, Thaís Gomes; Silva, Fernanda Dornelas Florentino; Gregori, Fábio; Alfieri, Amauri Alcindo; Buzinaro, Maria da Glória; Fagliari, José Jurandir.
Afiliação
  • Rocha TG; Research Laboratory of the Department of Veterinary Medicine and Surgery, School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Via de Acesso Prof. Paulo Donato Castellane, s/n, Jaboticabal, SP, CEP14884-900, Brazil. thaisgrocha@yahoo.com.br.
  • Silva FD; , Jaboticabal, SP, CEP 14870-720, Brazil. thaisgrocha@yahoo.com.br.
  • Gregori F; Department of Preventive Veterinary Medicine and Animal Health, College of Veterinary Medicine, University of São Paulo (USP), Av. Prof. Dr. Orlando Marques de Paiva, 87, São Paulo, SP, CEP 05508-900, Brazil.
  • Alfieri AA; Department of Preventive Veterinary Medicine and Animal Health, College of Veterinary Medicine, University of São Paulo (USP), Av. Prof. Dr. Orlando Marques de Paiva, 87, São Paulo, SP, CEP 05508-900, Brazil.
  • Buzinaro MD; Laboratory of Animal Virology, Department of Veterinary Preventive Medicine, Universidade Estadual de Londrina, Celso Garcia Cid Road, PR455 Km 380, P.O. Box 10.011, Londrina, PR, CEP 86057-970, Brazil.
  • Fagliari JJ; Department of Preventive Veterinary Medicine, School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Via de Acesso Prof. Paulo Donato Castellane, s/n, Jaboticabal, SP, CEP 14884-900, Brazil.
Trop Anim Health Prod ; 49(4): 783-790, 2017 Apr.
Article em En | MEDLINE | ID: mdl-28321789
Reports of rotavirus excretion in calves usually result from cross-sectional studies, and in face of the conflicting results regarding protection of calves born to vaccinated dams against diarrhea, the aim of the present study was to evaluate rotavirus excretion in dairy calves born to vaccinated or unvaccinated dams, to identify the genotypes of bovine rotavirus group A (RVA) strains isolated from these animals as well as to investigate characteristics of the disease in naturally occurring circumstances throughout the first month of life. Five hundred fifty-two fecal samples were taken from 56 calves, 28 from each farm and, in the vaccinated herd, 11/281 samples (3.91%) taken from six different calves tested positive for RVA while in the unvaccinated herd, 3/271 samples (1.11%) taken from 3 different calves tested positive. The genotyping of the VP7 genes showed 91.2% nucleotide sequence identity to G6 genotype (NCDV strain), and for the VP4 gene, strains from the vaccinated herd were 96.6% related to B223 strain, while strains from the unvaccinated herd were 88% related to P[5] genotype (UK strain). Genotypes found in this study were G6P[11] in the vaccinated herd and G6P[5] in the unvaccinated herd. All calves infected with rotavirus presented an episode of diarrhea in the first month of life, and the discrepancy between the genotypes found in the commercial vaccine (G6P[1] and G10P[11]) and the rotavirus strains circulating in both vaccinated and unvaccinated herds show the importance of keeping constant surveillance in order to avoid potential causes of vaccination failure.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Infecções por Rotavirus / Doenças dos Bovinos / Vacinação / Rotavirus / Vacinas contra Rotavirus Tipo de estudo: Observational_studies / Prevalence_studies / Prognostic_studies / Risk_factors_studies Limite: Animals Idioma: En Revista: Trop Anim Health Prod Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Infecções por Rotavirus / Doenças dos Bovinos / Vacinação / Rotavirus / Vacinas contra Rotavirus Tipo de estudo: Observational_studies / Prevalence_studies / Prognostic_studies / Risk_factors_studies Limite: Animals Idioma: En Revista: Trop Anim Health Prod Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos