[Study on risk factors of sporadic hepatitis E virus cases in some districts of Shanghai].

Objective: To study the risk factors of acute sporadic hepatitis E virus (HEV) cases and to analyze its partial sequence in some districts of Shanghai.

Methods: 30 blood samples were collected from the acute sporadic HEV cases in 2003-2004 and the RT-nPCR method was applied to obtain the sequence of HEV in these cases. Meanwhile, a 1:2 case-control study was used to identify risk factors in the process of sporadic HEV infection in these regions of Shanghai.