الفهرس يوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
* Bacteriological examination of a total of 300 living or freshly dead local breed chickens ranged in age from 4- to -16 weeks revealed that 97 cases were found to be bacteriologically positive for Campylobacters with an incidence of 32.3% .
* Bacteriological examination of 50 apparently healthy chickens revealed an incidence of 18% for Campylobacter species , while it was 35.2% among 250 clinically diseased chickens .
* It was found that jejunal and cecal contents followed by liver tissue , gall bladder and finally heart blood were the sites of recovery of Campylobacter species in a descending manner .
* Incidence of isolation of C.jejuni from jejunum and cecum was ( 64%) and ( 26%) respectively in diseased chicken and was ( 50%) and ( 33.3% ) in apparently healthy chickens .
* Incidence of isolation of C.coli from cecum and jejunum was (68.4% ) and ( 21.1% ) respectively in diseased chicken and was (66.7% ) and ( 33.3% ) in apparently healthy chickens respectively .
* C.lari was isolated and recovered from liver and jejunum only ( 60% and 40% respectively ) from diseased chickens .
* Biochemical Identification of the recovered isolates revealed that there were 51 isolates of C. jejuni ( 52.6 % ) , 41 isolates of C. coli ( 42.3 % ) and 5 isolates of C. lari ( 5.1 % )
* Biochemical characterization of the isolated Campylobacter species demonstrated that there was a differences in biochemical characteristics within the same isolated strains .
* In experimental infection of chickens with C.jejuni , the mortality rates was (30%) among chickens infected intramuscularly while it was ( 20% ) after oral infection .
* In experimental infection of chickens with C.coli , the mortality rates were ( 20% ) among chickens infected orally and were (25% ) after I / M infection .
* In experimental infection of chickens with C.jejuni and C.coli , the mortality rates were higher where it was 35% mortality after I/M infection and it was 25% after oral infection .
* Antimicrobial sensitivity test of Campylobacter isolates revealed that :-
- C.jejuni was highly sensitive to clindamycin and spectinomycin , colistin sulphate , spiramycin and gentamycin ( 90% ) .
- C.jejuni was resistant to amoxicillin ( 90%) , penicillin ( 60% ) and norfloxacin (50% ) .
- C.coli was highly sensitive to clindamycin and spectinomycin ( 87.5% ) , colistin sulphate (75%) and gentamycin ( 75% ) .
- C.coli was resistant to amoxicillin ( 87.5% ) , oxytetracycline (75%) and penicillin ( 75% ).