Streptobacillus

**Definition:** A genus of gram-negative, facultatively anaerobic, rod-shaped bacteria that require SERUM; ASCITIC FLUID; or BLOOD for growth. Its organisms inhabit the THROAT; and NASOPHARYNX of wild and laboratory rats and cause one form of RAT-BITE FEVER in man.

**Tree numbers:** - B03.370.700 - B03.440.450.700