Determine the weight of thymus, bursa of Fabricius and spleen and its ratio to body weight in some diseases of broilers

Abstract

Evaluation of lymphoid organs weight and determination of their weight: body weight ratio is the most used model to estimate protection rate given by vaccines against some diseases. This study designed to provide a generic look at the chicken lymphoid system through the use of thymus, bursa of Fabricius and spleen indices in an attempt to access further clarify or to give a tentative diagnosis for confirming final diagnosis of poultry diseases. Results indicated that recognizable difference (p 0.05) between the thymus, bursa of Fabricius and spleen indices of the infectious bronchitis (IB), chronic respiratory disease (CRD) and coccidiosis compared to the uninfected control. In conclusion the morphometric diagnosis of the thymus, bursa of Fabricius and spleen, gain good information on the process of disease diagnosis in case of IBD and mycotoxicosis.

Keywords

• broilers
• Thymus
• busa of fabricius
• spleen
• morphometri