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Original Article

AJVS. 2014; 43(1): 8-16

Epidemiological, Clinical and Bacteriological Studies on Bacterial Lamb Enteritis at Behera Province, Egypt

Mohammad Nasr, Nabil M. Bakeer, Hassan A. Hammouda, Alaa A. Omar.

Lamb enteritis is economically important problem because several agents may be involved in the etiology of it. This study was conducted to throw light on bacterial enteritis in some sheep flocks in Behera province. From 1200 examined lambs, 650 showed enteritis (54.16 %). Enteritis rate were higher in closed system (83.70 %0 than in open system (46.80 %). Mortality rate was (4.16 %) and case fatality was (7.69 %). Bacteriological examination of fecal samples revealed that 190 lambs (29 %) were positive for pathogenic bacterial culture and 460 lambs (71 %) were negative. The isolated bacteria were E. coli pathogenic form from 65 cases (34.20 %) which was the most predominant bacterial isolate. Other bacteria isolated were salmonella from 10 cases (5.26 %), clostridia isolated from 15 cases (7.89 %), proteus species isolated from 25 cases (13.10 %), shigella isolated from 20 cases (10.52 %), klebsiella isolated from 15 cases (7.89 %) and mixed infection was reported in 40 cases (21 %). Serotyping of E coli revealed that O55/K50 (B5) (2 isolates), while O78/K80 (B-), O125/K70 (B15), O101/K99 and O22/K11 (L) and each of them (1 isolates), while the untypable isolates was (4 isolates). Salmonella typing revealed that S. typhimurium serotype B (2 isolates), S. enteritidis serotype D1 (1 isolate) and the un typable salmonella isolates (2 isolates). The antimicrobials susceptibility of isolated bacteria was done to determine its susceptibility.

Key words: Bacterial enteritis, lambs

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