Prevalence of pasteurella multocida in waterfowl which suffering from respiratory disorder and its sensitivity to some different antibiotics

Abstract EN

A total of 250 waterfowl (150 ducks and 100 geese), having a history <$fi respiratory disorders and mortality, additional to 30 water and 30? sediments samples which waterfowl income were examined in the^ present study.

Samples were collected from different private farms ancT flock's ducks and geese in Alexandria Province for P.M and bacteriological examination.

The clinical sings showed exhausted birds drowsy, loss of appetite, swim in circles, lameness, swollen wattles' : difficult breathing, cyanosis, watery green yellowish diarrhea, ruffled :' feathers, mucous discharge from the mouth, while postmortem lesions revealed hemorrhages of various sizes on the heart, liver, gizzard and ? Intestines, also white spots and necrotic foci were present on the liver and spleen.

Bacteriological examination of these samples for the prevalence of P.

multocida according to morphological characters and biochemical reactions, revealed 134 P.

multiday isolates out of 360 samples with incidence of (43.2%).

92(61.3%) of P.

multiday isolates from ducks, 36 (36%) and geese samples, 4 (13.3%) isolates from water samples and 2 (6.7%) isolates from sediments samples.

There are variations in the prevalence rate of P.

multocida isolates from apparently healthy, diseased and freshly dead in both ducks and geese examined.

It was found 3 (7.5%) in apparent healthy, 75 (53.6%) in diseased birds, while was 50 (71.4%) in dead birds.

Results of experimental infection of P.

multocida isolates in mice and ducks revealed difference in mortality rate between strains isolated which ranging from 20% to 100% due to difference in the virulence of these strains.

The clinical symptoms and post-mortem pictures of experimentally inoculated ducks are similarly to those observed in naturally.

Sensitivity test revealed that P.

multocida isolates were more sensitive to Penicillin, Lincomycin and Ox tetracycline, while were resistant to Chloramphenicol, Neomycin and Streptomycin.