Sequencing and phylogenetic analysis of the infectious bursal disease virus isolates from outbreak in layer flocks in the state of Minas Gerais

Abstract

Sequencing and phylogenetic analysis based on the nucleotide sequence of the gene encoding VP2 protein was carried out in order to characterize the agent of two outbreaks of infectious bursal disease in layer flocks in the state of Minas Gerais in 2004. The results indicate the outbreaks could be related to the vaccinal virus.

Immune Response Study to Live Infectious Bursal Disease Vaccines in Broiler Chickens

“…In general, vaccine efficacy highly depends on the dose and strains of the vaccine and challenge viruses, as well as, the route of administration, the appropriate vaccination time, and the levels of maternal antibodies (OIE, 2012). Inspite of extensive control measures the farmers are still facing the problems of Gumboro even in the vaccinated flocks (Hasan et al, 1998;Dias et al, 2009). Control of IBD poses one of the most challenging tasks in the poultry health management.…”

Estimation of Age of Infectious Bursal Disease Vaccination in Broiler Chickens in Haryana

“…Generally vaccination is done at 12-15 day of age in broiler chickens. Inspite of extensive control measures the farmers are still facing the problems of Gumboro even in the vaccinated flocks (Hasan et al, 1998;Dias et al, 2009;Anonymous, 2015). Therefore, estimation of maternal antibody titre and age of vaccination in broiler chicken still remains a major area of concern and forms a prime area of research.…”