Streptococci and Some Disorders They Cause
Species | Circumstances | Disorders |
|---|---|---|
Group A | ||
Streptococcus pyogenes | Ears, nose, and throat | Middle ear infection (otitis media) Sore throat (pharyngitis, called strep throat) |
Skin | Cellulitis (infection of tissues just under the skin) Erysipelas (a superficial form of cellulitis) Impetigo (a skin infection) Wound infections | |
Other | Infection of heart valves (endocarditis) Pleurisy Scarlet fever (no longer common) | |
Disorders that develop after streptococcal infections | Glomerulonephritis (kidney inflammation) | |
Group B | ||
Streptococcus agalactiae | In adults, especially those with diabetes mellitus | Abscesses Cellulitis Wound infections |
In newborns | ||
In women after delivery of a baby | Bloodstream infections Infection of the uterus (endometritis) | |
Viridans | ||
Various species | — | Infection of heart valves (endocarditis) that have been damaged by a disorder such as a congenital heart disorder or rheumatic fever |