The potential risk and control strategy in low endemic area of schistosomiasis in China.

Objective: to describe and analyze the potential risk and suggest the corresponding control strategy in low endemic of schistosomiasis in China.

Methods: referring the 'national criteria of control and elimination of schistosomiasis' and the 'national criteria of classification of endemic area for chemotherapy'; collecting the data of the re-infection of schistosomiasis in lake region and residual snails in mountain areas and evolution of endemic situation in 'snail ridden areas without schistosomiasis'; analyzing the potential risk in different types of low endemic area and suggesting the control strategies according to the analysis results and historical experiment.

Results: the re-infection rate of schistosomiasis in residents is usually higher in high, medium and low endemic areas in the lake region, once chemotherapy is stopped, the infection rate may rise again to the initial level 2 years later and bovine chemotherapy and snail control in susceptible zone will be selected as the optimal strategies for controlling the endemic situation; the potential risk in mountain areas is the enlargement of snail habitats due to residual snail's reproduction and the control strategy will be to strengthen the surveillance and elimination of residual snails; inputting the infective sources of schistosomiasis is the potential risk in 'snail ridden area without schistosomiasis' and the main control strategy should be put the regular monitoring on the infection sources from hyper-endemic areas and treat the infected domestic animals in time.

The role of health education for schistosomiasis control in heavy endemic area of Poyang Lake region, People's Republic of China.

For exploring the impact of health education for schistosomiasis control in a heavy endemic area of Poyang Lake region, China, the residents residing in the heavy endemic area were divide into three kinds of target population: pupils, adult women and adult men, and then targeted health education was implemented respectively among the three kinds of population after a baseline survey. The result were compared with that in the control group. The anti-schistosomiasis knowledge level among the three kinds of population improved significantly, the correct rate of attitude to examination and chemotherapy among pupils and adult men and the correct rate of anti-schistosomiasis value concept among women were raised greatly, obedience to examination and chemotherapy among adult men increased, the rate of infested water exposure and infection rate among pupils and adult women declined remarkably.

The relationship between morbidity and intensity of Schistosoma japonicum infection of a community in Jiangxi Province, China.

Seven hundred and eighty-five individuals from an area endemic for Schistosoma japonicum had parasitological and physical examinations done. A morbidity questionnaire was also administered to each participant. Among those with S.

Reinfection with Schistosoma japonicum after treatment with praziquantel in Poyang lake region, China.

The study on reinfection with Schistosoma japonicum after treatment was carried out in a cohort of subjects in a heavy endemic village of Poyang lake region, China. After mass treatment with praziquantel in non-transmission time, detailed observations of water contact were estimated using the mean area of skin exposed daily. One year after treatment, the prevalence of infection in study subjects was 54.