Abstract
A patient with Hepatitis A virus (HAV) infection was notified to the public health authority. The identical HAV was found at a water dispensing outlet at the ground water facility and the toilet close to the facility. Serosurveillance in the community was conducted. Suspicious individuals were asked to visit city public health center and had a serologic test for anti-HAV Ig M. Overall, 100 individuals were tested, and all were negative for the anti-HAV Ig M. In our study cohort, we could not identify additional case of HAV infection.