Analysis on the surveillance data of typhoid fever and paratyphoid fever in Yuhuan county, Zhejiang province from 2005 to 2007

Objective　The present study was conducted to determine the prevalence of typhoid fever and paratyphoid fever in Yuhuan county and evaluate the surveillance system based on local epidemic situations and surveillance data between 2005 and 2007. Methods　Epidemic situations and surveillance data of typhoid and paratyphoid fever in Yuhuan county between 2005 and 2007 were recorded with Excel software and analyzed with SPSS software package. Results　Salmonella paratyphosa isolates was the dominant pathogen responsible for the diseases, which accounted for 91.7% of locally isolated strains. In contrast to the decreasing epidemic situations in the recent 3 years; average incidence of surveilled suspected cases was 16.86% and increased annually with a mean rate of 66.59%. The detection of bacteria in the interested population, individuals with close contact with patients, patients in restorative stage and previous patients was rare. Nothing positive was found in the external environments and foods. Conclusion Reinforcement of surveillance, early detection of cases, and standard treatment are currently major measures for the control of typhoid fever and paratyphoid fever.