Fasciolosis Reinfection in Japan.

Fasciolosis is a major cause of food-borne parasitic zoonosis. It primarily affects ruminants but also infects humans. Clinically, it is characterized by abnormal liver images with prominent eosinophilia. We herein report a 77-year-old Japanese livestock farmer, who experienced fasciolosis reinfection. Environmental investigation of his residence revealed that both intermediate host snails and sika deer, a natural final host, inhabited his house. In addition, cattle were infected with Fasciola. Based on these findings, we concluded that his work place was accidentally contaminated with Fasciola metacercariae.