Objective To accurately master epidemical situation of epidemic encephalitis B (Abbreviated Encephalitis B)and to analyze status on cases reporting and establishment surveillance system. Methods A surveillance-system of Encephalitis B was established. Encephalitis B situation data of over the years and case-surveyed data after establishment of surveillance-system has been collected to analyze epidemic encephalitis B cases' characters. Results In recent years in Hainan, encephalitis B also occurred periodically and reached the peak in 2003 years; 50 suspectable cases including 19 experimentation-diagnosed definitely cases were surveyed after the establishment of surveillance-system (no case was diagnosed in 2001 year). The 19 diagnosed cases happened dispersedly in 5～7 month with no immunity history. Conclusion The surveillance sensitivity has been improved to a great extent and the cases have been reported in time. Encephalitis B infection can be controlled effectively through improving encephalitis B vaccine inoculation rate and strengthening surveillance.
China Tropical Medicine