However, filaria caused by the Wuchereria bancrofti nematode was found throughout Japan and mainly in the south of Kyushu until relatively recently, so it cannot be confirmed that he contracted the infection in Oki-no-erabujima Island.
ただし、比較的近年に至るまでバンクロフト糸状虫によるフィラリア感染症は九州南部を中心に日本各地に見られ、疫学的には必ずしも感染地を沖永良部島には特定できない。