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in humans, an acute infectious disease caused by the spirochete Spirillum minus. Sodoku is usually transmitted by the bite of a rat; more rarely it is caused by the bite of a weasel, marten, squirrel, cat, or dog. The incubation period is ten to 14 days. The disease is manifested by periodic attacks of fever, painful swelling at the site of the bite (with the subsequent formation of an ulcer), headache, muscle pains, rash, and inflammation of the lymph nodes. The disease is extremely rare in the USSR. Sodoku is treated with antibiotics and Novarsenolum. Preventive treatment includes the extermination of rats.
The term “sodoku” is sometimes used to designate Haverhill fever, a disease caused by Streptobacillus moniliformis. The disease is transmitted by a rat bite or infected milk. The incubation period is two to five days, and the clinical symptoms are similar to those of sodoku, although ulcers do not form at the site of the bite and the disease’s course is more severe.