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Pasteurella multocida

Pasteurella multocida. Formerly known as PASTEURELLA SEPTICA. Introduction. A group of related bacteria isolated from hemorrhagic septicemia in a variety of animals and birds are considered as strains of single sps. Designated as P.multocida. Morphology. Non motile Gram negative bacilli

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Pasteurella multocida

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  1. Pasteurella multocida Formerly known as PASTEURELLA SEPTICA

  2. Introduction A group of related bacteria isolated from hemorrhagic septicemia in a variety of animals and birds are considered as strains of single sps. Designated as P.multocida

  3. Morphology • Non motile • Gram negative bacilli • Non sporing • It resembles Yersinia in morphology

  4. Culture • Blood agar: moist, mucoid, and slimy growth (smooth watery colonies) • Nutrient broth: granular deposits at the bottom of test tube • Mac conkey agar: colourless, non lactose fermenting Yersinia pasteurella

  5. Bio-chemical reactions • Catalase: positive • Oxidase: positive

  6. Indole: positive • Nitrate red.: +ve • Gelatin: positive • Lactose: non fermentor

  7. Pathogenesis • Often present in upper respiratory tract of animals such as sheep, dogs, cats, rats, and cattle • Some times commensals in humans • Infection Is by animal bites or trauma

  8. Clinical manifestation • Local suppurative infections after bite • Wound infections, • Cellulitis, • Abscess, • Osteomyelitis. • Meningitis following head injury. • Respiratory tract infection. • Pneumonia, bronchitis, sinusitis • Appendicitis and its abscess

  9. Treatment • Tetracyclin • Streptomycin • penicillin

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