Measuring exposure to Schistosoma japonicum in China. III. Activity diaries, snail and human infection, transmission ecology and options for control

We used activity diaries and snail detection to relate water contact and Schistosoma japonicum infection among a cohort of 178 residents on two islands in the Dongting Lake, China. Water exposure to each of 12 mapped water zones around the islands was calculated (m 2 min/day) for each subject. Infec...

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Bibliographic Details
Published in:Acta tropica 2000-05, Vol.75 (3), p.279-289
Main Authors: Li, Yuesheng, Sleigh, Adrian C., Williams, Gail M., Ross, Allen G.P., Li, Y., Forsyth, Simon J., Tanner, Marcel, McManus, Donald P.
Format: Article
Language:English
Subjects:
Activity diaries
Adult
Animals
Biological and medical sciences
China
China - epidemiology
Cohort Studies
Data Collection
Diseases caused by trematodes
Environmental Exposure - analysis
Environmental Monitoring - methods
Epidemiological Monitoring
Feces - parasitology
Female
Helminthic diseases
Humans
Incidence
Infectious diseases
Male
Medical sciences
Middle Aged
Oncomelania
Parasitic diseases
Risk Factors
Schistosoma japonicum
Schistosoma japonicum - isolation & purification
Schistosomiases
Schistosomiasis control
Schistosomiasis japonica - epidemiology
Schistosomiasis japonica - parasitology
Schistosomiasis japonica - transmission
Snails
Snails - parasitology
Tropical medicine
Water exposure
Water Pollution - analysis
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Summary:We used activity diaries and snail detection to relate water contact and Schistosoma japonicum infection among a cohort of 178 residents on two islands in the Dongting Lake, China. Water exposure to each of 12 mapped water zones around the islands was calculated (m 2 min/day) for each subject. Infected Oncomelania hupensis hupensis snails in this area are focal and were found in only five of the 12 zones, with the highest rate being 5.7%. Thirty-one subjects (17%) were re-infected with a mean intensity of 63.2 epg. Mean water contact was 7.9 m 2 min/day; 98% of water exposure was due to economic activity and only 2% due to swimming or bathing, washing and other necessities of daily life. Males had more exposure and infection than females ( P
ISSN:0001-706X
1873-6254
DOI:10.1016/S0001-706X(00)00056-5