Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
Spirillum minor is a Gram-negative, spiral-shaped bacterium known for causing rat-bite fever. It is typically transmitted through bites or scratches from infected rodents.
5 Must Know Facts For Your Next Test
Spirillum minor causes rat-bite fever, also known as sodoku.
It is a Gram-negative bacterium with a characteristic spiral shape.
The incubation period for infection ranges from one to three weeks post-exposure.
Symptoms often include fever, muscle pain, and ulceration at the site of the bite.
Diagnosis is generally confirmed through serological tests and culture of the bacteria.
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Related terms
Gram-negative bacteria: Bacteria that do not retain the crystal violet stain used in the Gram staining method.
Rat-bite fever: An infectious disease caused by either Streptobacillus moniliformis or Spirillum minor, following a rodent bite.
Serological tests: Laboratory tests used to detect antibodies or antigens in blood samples.