الفهرس | Only 14 pages are availabe for public view |
Abstract Duck industry in Egypt and other countries in the world is exposed to many diseases affecting growth rates and production particularly bacterial causes. So this work aimed to study some disease conditions of ducklings specially those causing respiratory manifestations. A total of 293 ducklings were collected from different localities at Sharkia Governorate either in moribund state or freshly dead. The examined samples yielded III positive bacterial isolates from different organs. Theses isolates were 65 (58.56%) Escherichia coli; 30(27.02%) Salmonella species ; 9( 8.11 %) Pasteurella species; 6 (5.40%) Staphylococcus species; 1 (. 90%) Riemerella; 8 (8.42%) mixed infection of Eicoli and Salmonella; 4 (5.40%) mixed infection of Pasteurella and E.coli; 2 (2.81 %) mixed infection Staphylococci and Eicoli. The prevalence of bacterial isolates in the different internal organs of examined ducklings revealed that the percentage of Ecoli isolates were 50.77%, 33.85%, 15.38% in liver, lung and heart respectively. Meanwhile, the of Salmonella percentage were 43.33%, 23.33%, 16.67%, 10% and 6.67% in liver, kidney, heart, lung and yolk sac respectively. While, Pasteurella percentages were 55.56%, 33.33% and 11.11 % in liver, heart and lung. On other hand, the Riemerella anatipestifer isolate was detected only in the liver 100%. All bacterial isolates of E.coli , Salmonellae,Pasteurellae and Riemerella were biochemically identified with both conventional biochemical test and API20 tests. |