Analysis of Hepatitis B Virus Infection Rate of Employees in Food Industry and Public Places in Kaili City From 2001 to 2006

Objective To survey the HBsAg positive rate of the employees in the food industry and public places of Kaili, and to offer more credible evidences to health supervision. Methods Blood samples of 19,383 employees of the food industry and public places were examined by Center for Disease Control and Prevention of Qiandongnan Prefecture from 2001 to 2006, HBsAg was determined by enzyme linked immunosorbent assay (ELISA). Results The positive rate of HBsAg was 4.06%, the males (5.27%) was higher than the females (3.46%). The HBsAg positive rate in the age group under 20 years (5.89%) was relatively higher, while the positive rate of HBsAg was lower in the older age group. The HBsAg positive rate of Miao nationality (5.81%) was the highest and the Han (2.56%) was the least. Employees graduated from junior middle school or primary school showed higher HBsAg positive rate (4.68%). About 52.79% of the HBsAg positive cases examined for HBsAb, HBeAg, HBeAb and HBcAb. There were almost 1/3 employees who were in period of HBV active replication during 2001～2003; and 65.56%of the HBsAg positive cases examined HBeAg,the positive rate of HBeAg was 35.02%. Conclusions To control HBV transmission, we must strengthen the public health supervision, develop the health education among the employees in the food industry and public places, implement HBV vaccination programme in HBsAg negative population, and enhance the disinfection and supervision of the surroundings and goods of the food industry and public places.