Epidemiology of tuberculosis in foreign students in Japan, 2015–2019: a comparison with the notification rates in their countries of origin

Abstract

Tuberculosis (TB) in immigrants is becoming a challenge in eliminating TB in Japan.We investigated the epidemiology of TB in foreign students in Japan in 2015-2019. A total of 2007 foreign students with TB whose median age was 22.5 years ( 1243[61.9%] were males) were registered. The notification rates peaked in 2016 at 164.0 per 100 000 population and decreased toward 2019. Of the 2007, 535 were from Viet Nam, 444 from China and 395 from Nepal. The notification rates were 596.6 per 100 000 person-years (PYs) for Myanmar, 595.4 for the Philippines, and 438.6 for Cambodia. The rates were much higher than those of the general populations in their countries of origin for Myanmar, the Philippines, Cambodia, Indonesia, Nepal, Mongolia, Viet Nam, and China. In comparison with the years 2010-2014, the notification rates for foreign students decreased for the students from Nepal, Viet Nam and China. The TB notification rate of the foreign students in Japan can be a good surrogate indicator for the risk of TB among the immigrant subpopulation in Japan and should continuously be monitored. Those who are at higher risk of TB may be annually screened for TB to prevent TB outbreaks.