Travel-related illness at a tertiary care hospital in Osaka, Japan.

We analyzed the travel-related health problems in persons returning to Japan from overseas. Data were extracted retrospectively for all patients visiting the infectious diseases department of Osaka City General Hospital, Osaka, Japan, between July 2012 and September 2013. There were 209 sick returning travelers during the period of the study. The median age of the subjects was 34.3 years, and the subjects consisted of 133 tourists (63.6%), 39 business travelers (18.7%), 17 expatriates (8.1%), 14 volunteer workers (6.7%), and four persons who visited friends and relatives (1.9%). The most visited destinations were Asia (n=162, 77.5%), including East Asia (n=26, 12.4%), Southeast Asia (n=116, 55.5%), South Asia (n=25, 12.0%), Central Asia (n=3, 1.4%), and Africa (n=30, 14.3%). The most commonly diagnosed diseases were gastrointestinal tract infection (n=81, 38.8%), dengue fever (n=26, 12.4%), and animal bites (n=26, 12.4%). Twenty-nine patients (13.8%) were hospitalized, mainly for dengue fever and gastrointestinal tract infection.