Résumé
Objective To investigate the distribution and characteristics of advanced schistosomi-asis in Hunan Province in order to provide some references for policy making of the control program. Methods The survey scheme of advanced schistosomiasis was made out, in which investigation variables and diagnostic criteria were standardized. The survey was carried out in the whole province. Results There were 5 405 cases of advanced schistosomiasis, reduced by 21. 64% compared with the registration number in the previous files. The prevalence rate was 8. 69/10 000, of which 16. 21% was new cases, 97. 06% were distributed in lake regions and 2. 94% in hilly regions. Of total cases, 78. 70% was located in transmission areas, 15.64% in transmission controlled areas, and 5. 66% in transmission interrupted areas. Cases with splenomegaly made up 59. 4%, ones with ascitis 37. 30% and colonic granulomatous and dwarfism type 3. 16%. Male cases took up 77.39% and female ones 22.61%. In the splenomegaly type 52.24% of patients had performed splenectomy. The youngest case was 14 years old and the oldest 90 years old. Cases of 50-, 60- age group made up 65. 18%, and 32.7% of cases came from 30-, 40-, 70- age group and 2. 09% from the remaining age groups. Farmer took up 87. 58% of all occupations and others occupied 12. 42%. Conclusion The advanced schistosomiasis cases in Hunan Province are showing the falling tendency, although some new cases occur. The main advanced cases come from the farmer in lake regions.