Pasteurella
General:
Clinical: Most human infections are secondary to animal contact (bites, scratches, shared food). Three general presentations: 1) local cellulitis/lymphadenitis, 2) exacerbation of COPD, or 3) sepsis, usually in immunocompromised.
- Normal: Colonize oropharynx of healthy animals.
- Abnormal:
Resistance:
Morphology: Small Gram- coccobacilli.
Growth characteristics: Fermentative, facultative anaerobes. Grow well on blood agar and chocolate agar, but poorly on MacConkey agar and other media usually used for Gram- rods. Produces large, buttery colonies with musty odor (due to indole production) after 24hrs on blood agar.
Common/important pathogens:
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