Most of foreign workers came from Southeast Asia, and their sanitary and healthy habits are different from that of local residents. The analysis of periodical alien laborers medical examination reports showed that the major abnormal item is parasite infection. Therefore, this study evaluated the clinical symptoms of the parasite infection cases,who work as housekeepers, by interviewing employers' points of view on the infective alien laborers's food, sanitary habits and health management via telephone survey. This study analyzed the clinical symptoms of 514 cases by gender, age, nationality and occupation. Significant relationship between the alien laborers' infection and employers' health management was found.