Mannheimia haemolytica

**Semantic type:** Bacterium

**Definition:** A species of facultatively anaerobic, Gram negative, rod shaped bacteria in the phylum Fusobacteria. This species is nonmotile, beta hemolytic, and ferments D sorbitol, D xylose and maltose, but not trehalose. M. haemolytica is a commensal organism of the upper respiratory tract of ruminants but may become pathogenic, causing pneumonia.

**Synonyms:** - MANNHEIMIA HAEMOLYTICA - Pasteurella haemolytica - Pasteurella haemolytica