Spirillary fever

This code represents Spirillary fever, also known as Sodoku, a rare zoonotic infection caused by Spirillum minus. It is typically transmitted through the bite of an infected rat or other rodents, leading to a relapsing fever, rash, and regional lymphadenopathy.

Use this code for confirmed cases of Spirillary fever diagnosed based on clinical presentation and a history of rodent bite, often supported by laboratory identification of the causative organism. Documentation should clearly describe the characteristic symptoms and the epidemiological link.

• Differentiate from other rat-bite fevers, such as Streptobacillary fever (Streptobacillus moniliformis), which has a distinct code.
• Ensure documentation specifies the type of rat-bite fever if a general "rat-bite fever" diagnosis is made.
• Consider an external cause code (E-code) if the rodent bite itself is documented as an injury.