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Characterization And Antibiotic Sensitivity Of Pasteurella Multocida Isolates From The Field Cases Of Haemorrhagic Septicaemia In Buffloes Of Punjab

By: Puran Das | Dr. Muhammed Amin Sheikh.
Contributor(s): Dr. Syed Ata-Ur-Rehman Rizvi | Faculty of Veterinary Sciences.
Material type: materialTypeLabelBookPublisher: 1996Subject(s): Department of MicrobiologyDDC classification: 0486,T Dissertation note: The research project accomplished was primarily concerned with the isolation and characterization of P. multocida strains involved in field outbreaks of HS in buffaloes of Punjab Province of Pakistan. In addition, isolates were also examined for their sensitivity to various antibiotics and suipha drugs. Isolation attempts, made both on blood samples of live diseased animals and long bones of the dead/slaughtered animals, yielded 10 strains of the organism, solely from the long bones. All the strains of P. inultocida isolated were uniform in their sugar fermentation and other biochemical reactions, giving a positive reaction for glucose, fructose, mannose, mannitol, sucrose, sorbitol and xylose, producing acid only and no gas. Like wise a positive reaction was also recorded for catalase, oxidase, indole production, nitrate reduction and H2S production tests. All the strains were however, unable to ferment arabinose, inositol, lactose, maltose, salicin, dulcitol and raffinose sugars and were negative for methyl red, voges proskauer, urease activity and gelatin liquefaction tests. All the isolates of P. multocida were serologically identified as Roberts type I. All the isolates proved highly pathogenic both to rabbits and mice alike. The antibiotic sensitivity results against 10 field strains and one reference strain of P. inultocida showed amoxicillin to be the most effective antibiotic. The rest of the antibiotics, placed in accordance with their effectivity, in descending order are ampicillin, chloramphenicol, norfloxicin, kanamycin, gentamycin, oxytetracycline and sulphamethaxazole + trimethoprim. None of the antibiotics except amoxicillin, was able to display equal effectivity against all the 11 strains of P. multocida examined.
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The research project accomplished was primarily concerned with the isolation and characterization of P. multocida strains involved in field outbreaks of HS in buffaloes of Punjab Province of Pakistan. In addition, isolates were also examined for their sensitivity to various antibiotics and suipha drugs. Isolation attempts, made both on blood samples of live diseased animals and long bones of the dead/slaughtered animals, yielded 10 strains of the organism, solely from the long bones.

All the strains of P. inultocida isolated were uniform in their sugar fermentation and other biochemical reactions, giving a positive reaction for glucose, fructose, mannose, mannitol, sucrose, sorbitol and xylose, producing acid only and no gas. Like wise a positive reaction was also recorded for catalase, oxidase, indole production, nitrate reduction and H2S production tests. All the strains were however, unable to ferment arabinose, inositol, lactose, maltose, salicin, dulcitol and raffinose sugars and were negative for methyl red, voges proskauer, urease activity and gelatin liquefaction tests.

All the isolates of P. multocida were serologically identified as Roberts type I. All the isolates proved highly pathogenic both to rabbits and mice alike.

The antibiotic sensitivity results against 10 field strains and one reference strain of P. inultocida showed amoxicillin to be the most effective antibiotic. The rest of the antibiotics, placed in accordance with their effectivity, in descending order are ampicillin, chloramphenicol, norfloxicin, kanamycin, gentamycin, oxytetracycline and sulphamethaxazole + trimethoprim.

None of the antibiotics except amoxicillin, was able to display equal effectivity against all the 11 strains of P. multocida examined.

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