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| The Bad Bug Book |
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1. Name of the Organism:
Streptococcus spp.
The genus Streptococcus is comprised of Gram-positive, microaerophilic
cocci (round), which are not motile and occur in chains or pairs. The
genus is defined by a combination of antigenic, hemolytic, and
physiological characteristics into Groups A, B, C, D, F, and G. Groups
A and D can be transmitted to humans via food.
Group A: one species with 40 antigenic types (S. pyogenes).
Group D: five species (S. faecalis, S. faecium, S. durans, S. avium, and
S. bovis).
2. Nature of Acute Disease:
Group A: Cause septic sore throat and scarlet fever as well as other
pyogenic and septicemic infections.
Group D: May produce a clinical syndrome similar to staphylococcal
intoxication.
3. Nature of Disease:
Group A: Sore and red throat, pain on swallowing, tonsilitis, high fever,
headache, nausea, vomiting, malaise, rhinorrhea; occasionally a rash
occurs, onset 1-3 days; the infectious dose is probably quite low (less
than 1,000 organisms).
Streptococcus spp.
The genus Streptococcus is comprised of Gram-positive, microaerophilic
cocci (round), which are not motile and occur in chains or pairs. The
genus is defined by a combination of antigenic, hemolytic, and
physiological characteristics into Groups A, B, C, D, F, and G. Groups
A and D can be transmitted to humans via food.
Group A: one species with 40 antigenic types (S. pyogenes).
Group D: five species (S. faecalis, S. faecium, S. durans, S. avium, and
S. bovis).
2. Nature of Acute Disease:
Group A: Cause septic sore throat and scarlet fever as well as other
pyogenic and septicemic infections.
Group D: May produce a clinical syndrome similar to staphylococcal
intoxication.
3. Nature of Disease:
Group A: Sore and red throat, pain on swallowing, tonsilitis, high fever,
headache, nausea, vomiting, malaise, rhinorrhea; occasionally a rash
occurs, onset 1-3 days; the infectious dose is probably quite low (less
than 1,000 organisms).
| The United States Food and Drug Administration's Bad Bug Book: Streptococcus spp. |