Effects Of Symbiotics On The Bursa Of Fabricius And Internal Organs

Abstract

Probiotics play a central role in maintaining health and preventing many disorders. They are microbial food supplements that have an effect on the health of the host. They protect the body itself from infections, particularly of the gastrointestinal tract. The study of weight performance and the yield of slaughtered products (liver spleen) showed that the best growth performances were recorded with the probiotic-treated subjects, with significant differences (p< 0.05). Similarly, the microbiological study showed that Lacidophilus adapts well to the animal's digestive tract, interacting with the endogenous flora through a reduction in E coli in both phases. The experiment was carried out on two flocks of broilers of the ARBOR ACRES strain vaccinated against infectious bursal disease with a complex immune vaccine on the first day, with a view to assessing changes in the bursa of Fabricius during the various rearing phases (end of start-up and end of growth). At the same time, measurements of the bursal index were carried out on the bursa of chickens from the two buildings, treated and control. This study showed that the bursal index is heterogeneous within the same flock and between the two rearing buildings. 57.63% of the chickens were in the 'poor' class (bursal index < 0.15%). The state of bursal atrophy was moderate to very severe. Based on these field observations, we can conclude that broiler farms suffer from poor prophylactic management due in part to the various stresses caused during rearing, poor hygienic conditions and dependence on the choice of using the right vaccine strains against infectious bursal disease.