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