Pasteurella multocida

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Presentation transcript:

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 Non sporing It resembles Yersinia in morphology

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

Bio-chemical reactions Catalase: positive Oxidase: positive

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

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

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

Treatment Tetracyclin Streptomycin penicillin