[An increase in reported cases of tularemia in Region Stockholm]

Tularemia is a zoonotic disease caused by the contagious bacterium Francisella tularensis. In Sweden, the infection is primarily transmitted through mosquito bites with peak season from August to October. Depending on the infection site, tularemia has six different clinical variants. Patients are often presented with the ulceroglandular form - fever, inoculation site ulcer and regional lymphadenopathy - but oculoglandular, glandular, oropharyngeal, pneumonic and typhoidal forms also occur. Historically endemic to northern Sweden, tularemia has spread further south since the first case was described in 1931. Due to clinical diversity and sometime prolonged course, the awareness of tularemia  is important for multiple medical specialties. The diagnosis should be considered among patients with typical symptoms in Sweden during peak season.