Update: outbreak of acute febrile respiratory illness among college students--Acapulco, Mexico, March 2001.

On March 30, CDC was notified by the Pennsylvania Department of Health of an acute febrile respiratory illness characterized by fever, chills, dry cough, chest pain, and headache among college students who traveled to Acapulco during March 2001. Initial laboratory testing indicated that most students had histoplasmosis, an infection caused by the soil-inhabiting fungus, Histoplasma capsulatum. While in Acapulco, most ill students had stayed at the Calinda Beach Hotel. This report updates the investigation of the outbreak and presents possible evidence of ongoing transmissions.