Original Research
A serological survey for infectious bursal disease virus antibodies in free-range village chickens in northern Tanzania
Journal of the South African Veterinary Association | Vol 82, No 1 | a30 |
DOI: https://doi.org/10.4102/jsava.v82i1.30
| © 2011 E. S. Swai, M. J. Kessy, P. N. Sanka, P. F. Mtui
| This work is licensed under CC Attribution 4.0
Submitted: 10 April 2011 | Published: 13 April 2011
Submitted: 10 April 2011 | Published: 13 April 2011
About the author(s)
E. S. Swai, Veterinary Investigation Centre, PO Box 1068, Arusha, Tanzania.M. J. Kessy, Veterinary Investigation Centre, PO Box 1068, Arusha, Tanzania., Tanzania, United Republic of
P. N. Sanka, Veterinary Investigation Centre, PO Box 1068, Arusha, Tanzania., Tanzania, United Republic of
P. F. Mtui, Veterinary Investigation Centre, PO Box 1068, Arusha, Tanzania., Tanzania, United Republic of
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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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