SEROLOGICAL SURVEY OF INFECTION BURSAL DISEASE IN CHICKENS AND ISOLATION OF THE VIRUS
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Date
1974
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Abstract
A study of infectious bursal disease (IBD) or ‘Gumboro disease’ seroprevalence rates in
healthy, non-vaccinated indigenous scavenging chickens in northern Tanzania was
conducted in November and December 2009 on 362 chickens raised in a traditional management
system. Individual bird and flock-level information was collected using a
semi-structured questionnaire, and serum samples were screened for IBD virus (IBDV)
antibodies using the enzyme-linked immunosorbent assay (ELISA). The study revealed
high rates of IBDV antibodies, yielding an overall seropositive rate of 58.8 % and with at
least one positive bird detected in 82.8 % (74/90) of flocks. Univariate logistic regression
analysis revealed that seropositivity to IBDV varied significantly (χ2 = 16.1, P < 0.001)
between the study sites. The flock seroprevalence was found to vary from 37.5 % to 91 %
between districts and from 75 % to 90 % between regions. The results of this study showed
that IBD is an endemic and widely distributed disease in northern Tanzania
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