Background:
Leptospirosis is a bacterial zoonotic disease with worldwide distribution.
Case presentation:
We describe and discuss the clinical course of a leptospirosis outbreak in a running club called the hash house harriers on Guam.
Conclusions:
Leptospirosis is a potentialy life threatening disease, and has had a reemergence given the popularity of travel adventure sports, teams, and clubs around the world. This case presentation highlights the robust prescence of leptospirosis on Guam.