Streptococcus mitis

Background

• Part of the normal flora of the oropharynx, female genital tract, gastrointestinal tract, and skin

Microbiology

• Member of the genus Streptococcus
• Gram-positive coccus
• On Gram stain, often has an arrow-head shape and grows in pairs or short chains
• Closely related to Streptococcus pneumoniae

Clinical Manifestations

• Generally low virulence
• Can cause bacteremia, infective endocarditis