Mannheimia haemolytica

**Definition:** A species of gram-negative, facultatively anaerobic, rod-shaped bacteria normally commensal in the flora of CATTLE and SHEEP. But under conditions of physical or PHYSIOLOGICAL STRESS, it can cause MASTITIS in sheep and SHIPPING FEVER or ENZOOTIC CALF PNEUMONIA in cattle. Its former name was Pasteurella haemolytica.

**Tree numbers:** - B03.440.450.600.500.500 - B03.660.250.550.500.500

**Synonyms:** - Pasteurella haemolytica - Pasteurella hemolytica