Haverhill fever

Medical condition

Haverhill fever is a systemic illness caused by the bacterium Streptobacillus moniliformis, an organism common in rats and mice. If untreated, the illness can have a mortality rate of up to 13%. Among the two types of rat-bite fever, Haverhill fever caused by Streptobacillus moniliformis is most common in North America. The other type of infection caused by Spirillum minus is more common in Asia and is also known as Sodoku.

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