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  • Title: [Epidemiology of diarrhea caused by Escherichia coli and rotavirus in calves and lambs in Morocco].
    Author: Fassi-Fehri MM, Johnson DW, Taoudi A, Berrada J.
    Journal: Ann Rech Vet; 1988; 19(1):59-64. PubMed ID: 3041900.
    Abstract:
    An epidemiological survey on E coli and rotavirus associated diarrheas in one to twenty five days old calves and lambs was made in three regions: Rabat-Kenitra, Marrakech and Agadir. Isolated E coli K99 stains have been studied of a biochemical, serotypical (O antigen) and antibiotypical point of view. The identification of rotavirus was made by ELISA test. Persistence of K99 antigen and heat stable toxin A was examined after a conservation of 5 weeks at - 18 degrees C. The frequency of E coli K99 or rotavirus associated diarrheas is respectively 26.9% and 29.7% in calf, 10% and 30% in lamb. This incidence considerably decreases from the 20th day in calf and from the 11th day in lamb. It must be observed that 34.8% of cases of diarrheas in calf and 55% in lamb cannot be ascribed to investigated agents. Only 12 out of 42 E coli K99 strains belong to serogroups O101, O8 and O9. Preservation of strains to - 18 degrees C comes with the loss of K99 antigen. These strains are not toxinogens. Among the strains having kept this antigen, 29% are toxinogens. Surveyings of antibiotics resistance was discussed.
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