NANNING -- An outbreak of hepatitis A in a middle school in south China's Guangxi Zhuang Autonomous Region has sent 112 students to hospital, an official said on Friday.

All of the students have been identified as carriers of the disease, while 21 have been diagnosed as suffering from symptoms of Hepatitis A and 33 others are suspected of coming down with the disease, said Gong Jian, head of the Guangxi center for disease control and prevention.

Gong said contaminated water and poor sanitation are partly to blame for the outbreak.

The junior middle school in Bobai county has 1,438 students including some 1,000 boarders.

The first case was found on November 23 and the outbreak spread on December 6, according to the official.
Gong said the outbreak is now under control.