A clinico-epidemiological approach for investigation of colostral immunity in newborn calves [electronic resource].

Includes references.

A total of 129 serum samples from apparently healthy calves (1-15 days old), 53 samples from diarrheic calves, and 22 from pneumonic calves were collected from Behera Governorate. The immunoglobulin concentration was measured by sodium sulfite turbidity test. The apparently healthy calves showed higher immunoglobulin concentrations than diseased calves. 'The total serum protein in healthy calves was higher than diseased calves and there were positive correlation (r= 0.745) between total serum protein and Ig concentration. It was found that sodium sulfite test is an easy reliable test to evaluate the immune statues of newborn calves. The biochemical and haematological changes among diarrheic calves were discussed. Bacteriological examination of faecal samples from diarrheic calves revealed isolation of E.coli (51 isolates); Campylobacter jujini (11 isolates), Salmonella species (3 isolates), Pseudomonas aeruginosa (3 isolates), and Yersinia enterocolitica (1 isolate). Bacteriological examination or pneumonic samples revealed Pasteurella haemolytica (10 isolates), Pasteurella multocida (7 isolates), Actynomycis pyogenes (2 isolates). Strept Species (2 isolates), Staphylococcus aureus (9 isolates), E. coli (8 isolates), Pseudomonas aeruginosa (4 isolate), Klebsiella pneumonia (3 isolates), Streptococcus pnumonae (2 isolates). 36% of E coli isolated from cases of diarrhea and 23.07 from cases of pneumonia were verotoxegenic.

Summary in Arabic.

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