5Steinmann P,Keiser J,Bos R,et al.Schistosomiasis and water re sources development:systematic review,meta analysis,and esti mates of people at risk[J].Lancet Infect Dis,2006,6(7):411-425.
6Utzinger J,Raso G,Brooker S,et al.Schistosomiasis and and sus tainable control and a word of caution[J].Parasitology,2009,136(13):1859-1874.
7Taylor M.Global trends in schistosomiasis control[R].Bull WorldHealth Organ,2008,86(10):738.
8Naus WA,Gachuhi K,Johu H,et al.Development of antibody iso type responses to Schistosoma mansoni in an immunologically naiveimmigrant population:influence of infection duration,infection inten sity,and host age[J].Infect Immun,1999,67(7):3444-3451.
9Chandiwana SK,Woolhouse ME.Heterogeneities in water contact pat terns and the epidemiology of Schistosoma haematobium[J].Parasitol ogy,1991,103(3):163-170.
10Abel L,Demenais F,Prata A,et al.Evidence for the segregation of amajor gene in human susceptibility/resistance to infection by Schisto soma manson[i J].Am J Hum Genet,1991,48(5):959-970.