Thick, gram-negative, coiled, spiral rod.
Bit by an Asian rat. Or by a rat in Asia. There was a case report of the disease from an Indian squirrel bite (PubMed).
One of the two causes of Rat Bite Fever.
The bite heals then 1 to 4 weeks later becomes painful, swollen, and purple then progresses to ulceration and eschar; it is associated with regional lymphangitis and lymphadenitis. Then fever, chills, headache, and malaise. There is a rash and a relapsing fever lasting 3 to 4 days with afebrile periods of 3 to 9 days. It can cause a variety of focal infections.
In Japan it is called sodoku, not to be confused with sudoku, only one of which is associated with seizures (PubMed).
Last Update: 04/20/18.