Objective To improve the national
surveillance plan on
bacillary dysentery and to increase the
sensitivity of the
surveillance system on the
disease.
Methods Data was collected through
China Disease Reporting Information System (CDRIS) and National
Sentinel Surveillance Sites on
bacillary dysentery. Data from the CDRIS was compared with the data from the National
Sentinel Surveillance to identify the exiting problems. Results Data from the
monitoring sites showed that the
detection rate of
infant cases of
bacillary dysentery infection was 1%,less than that of other
age groups. The highest rates were seen in
children aged 3 through 9 years. Rate on
misdiagnosis in all
age group was 23.38%,when using the
surveillance case definition of clinical cases and suspect case. The rate of
misdiagnosis on
infant cases of
bacillary dysentery infection by
clinical diagnosis was 50%. It showed that
Shigella flexneri and
Shigella sonnei were dominant with the positive rates as 57.21% and 42.41%,respectively. From the national
sentinel surveillance sites,the confirmed cases taking up 43.39% which did not match the figure from the CDRIS. Conclusion The diagnostic criterion for
bacillary dysentery fit well on other
age groups in
surveillance system except on
infants.
Active surveillance on
bacillary dysentery that combining both clinical and
laboratory diagnosis seems quite necessary on CDRIS,especially for
infants.