Recent studies on salmonella infection in chickens

Abstract

Avian salmonellosis considered an important disease causing serious impediment to the development of poultry industry which represents an important source of protein throughout the world, especially in developing countries of Asia and Africa and continue to causes economic losses particularly in those parts of the world where the poultry industries are continuing to intensify, as well as the most frequent foodborne gastrointestinal disease transmitted to humans. This work was carried out toprovide an update on the epidemiological situation of Salmonella in Egyptian poultry farm (field phase) and to study pathogenesis and immunological responses of the isolated bacteria in chicken host and study its ability to colonize ceca and systemic organs. (Experimental phase). In the present study the incidence of salmonella among chicken farms was 5.3% (14/263). It was (15.1%) among the broiler farms and (10.5%) among the layer farms by conventional culture methods. The results obtained showed that the incidence of Salmonella in different organ samples were as follows: 10.97% among liver samples and it considered the highest incidence of Salmonella isolation followed by yolk sac 7.8% while the lowest rate of Salmonella isolation was from the spleen 5%, no isolation from heart, ovary, fecal swabs and litter samples and it is belonging to four serotypes. S. Enteritidis and S. Typhimurium indicated the highest incidence (42.85% and 28.57%