An outbreak of holarctica-type tularemia in pediatric patients.

BACKGROUND

Holarctica-type tularemia is endemic in the Northern Hemisphere. Despite recurrent epidemics tularemia is not well known in children and the pediatric cases are often misdiagnosed.

METHODS

An outbreak of holarctica-type tularemia occurred in the Oulu region of Northern Finland in late summer/early August 2007. We collected prospectively data on all the cases of children diagnosed and treated for tularemia at the Department of Pediatrics, Oulu University Hospital, during the epidemic from July through September 2007.

RESULTS

Fifty patients were confirmed as having tularemia. All the cases appeared in a relatively small part of the Oulu region and almost all came from an area about 40 km in diameter where the annual incidence rate was high (342/100,000). Ulceroglandular tularemia was recorded in 47 of the 50 cases and secondary skin manifestations in half of the cases.

CONCLUSIONS

Tularemia caused by holarctica-type bacteria is a relatively mild infection, but symptoms are protracted in children and an epidemic consumes considerable health care resources.