A total of 120 samples from freshly dead ducks and 40 feacal samples from clinically sick ducks of different ages (1-30days) obtained from a private farms at the Dakahlia Governorate. The samples were dispatched to the laboratory to be examined bacteriologicaly for detection of actual bacterial causes of enteritis in ducks. All bacterial isolates were identified morphologically, culturally, biochemically and serologically for E.coli and Salmonella microorganisms. E.coli was the most prevalent bacterialagent 51(42.5%) followed by Klebsiella spp. 22 (18.3%), Pseudomonas aeruginosa 19(15.8%), Strept. faecalis 11 (.9.2%), Staph.aureus 8(6.7%), B-haemolytic streptococci 5(4.2%) and Salmonella spp < /em>. 4(3.3%). Serological identification of the isolated strains of E.coli from diarrhoeic duck showed that they belonged to 5 different "O" serogroups which were 26, 78, 86, 125, 157 and 21 strains of E.coli were serological untyped. Meanwhile, serotyping of the isolated strains of Salmonellae yielded 3 different serovars including S.typhimurium, S.derby and S.enteritidis. The antibiogram study done on all the isolated pathogens revealed that all strains were sensitive to Enerofloxacin and Gentamycin. All the isolated E.coli strains from the examined samples were enterotoxigenic produce heat labile enterotoxin.