The prevalence of subclinical infectious bursal disease in commercial broiler flocks
Other Title(s)
مدى انتشار الإصابة غير المرئية بمرض التهاب غدة فبريش المعدي في قطعان التسمين
Joint Authors
Dahshan, al-Husayni Muhammad
Husayn, Ahmad Mustafa
Source
Assiut Veterinary Medical Journal
Issue
Vol. 57, Issue 131 (31 Oct. 2011), pp.402-413, 12 p.
Publisher
Assiut University Faculty of Veterinary Medicine
Publication Date
2011-10-31
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Topics
Abstract EN
This study was conducted on twenty broiler farms located in Beni-Suef and El Minia Governorates during November and December 2009.
Fifty birds from each farm were subjected to investigation.
Bursae and serum samples were collected.
On the basis of lesions of IBD as bursal atrophy, including lymphoid necrosis, stromal edema, and infiltrates of heterophils and macrophages, were first detected in Bursae of Fabricius at 14 days of age and before vaccination.
At 37 days, all Bursae of Fabricius had lesions characteristic of IBD, including severe lymphoid depletion, proliferation of epithelial cells, and mild fibroplasia.
Although mean maternal antibody levels which estimated by enzyme-linked immunosorbent assay (ELISA) in broilers were apparently protective through day 13, IBD antibodies decreased to non-protective levels (below 1,000) by day 15 to 22.
Titers began to increase by day 27 to 34 because of field exposure.
The prevalence of IBD was 81.5 % and 71.1 % in Beni-Suef and El Minia respectively.
Highest prevalence was found in Beni-Suef and lowest was found in El Mina.
The study also showed that the broilers of two weeks of age were subjected to immunosuppression due to bursal damage and suggested that the existing vaccination programs were not effective.
American Psychological Association (APA)
Dahshan, al-Husayni Muhammad& Husayn, Ahmad Mustafa. 2011. The prevalence of subclinical infectious bursal disease in commercial broiler flocks. Assiut Veterinary Medical Journal،Vol. 57, no. 131, pp.402-413.
https://search.emarefa.net/detail/BIM-274653
Modern Language Association (MLA)
Dahshan, al-Husayni Muhammad& Husayn, Ahmad Mustafa. The prevalence of subclinical infectious bursal disease in commercial broiler flocks. Assiut Veterinary Medical Journal Vol. 57, no. 131 (Oct. 2011), pp.402-413.
https://search.emarefa.net/detail/BIM-274653
American Medical Association (AMA)
Dahshan, al-Husayni Muhammad& Husayn, Ahmad Mustafa. The prevalence of subclinical infectious bursal disease in commercial broiler flocks. Assiut Veterinary Medical Journal. 2011. Vol. 57, no. 131, pp.402-413.
https://search.emarefa.net/detail/BIM-274653
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 411-413
Record ID
BIM-274653