| molecular characterization of bulinus globosus and b. nasutus on zanzibar, and an investigation of their roles in the epidemiology of schistosoma haematobium. | the ribosomal internal transcribed spacer (its) regions of both bulinus globosus and b. nasutus from zanzibar were amplified and restricted with 6 enzymes. restriction products were separated by polyacrylamide gel electrophoresis and visualized by ethidium bromide staining. considerable genetic variation was observed at 3 levels: (i) between species, (ii) among populations and (iii) among individuals. in addition, the 18s ribosomal deoxyribonucleic acid gene was amplified from both species and t ... | 1997 | 9231216 |
| micro-epidemiology of urinary schistosomiasis in zanzibar: local risk factors associated with distribution of infections among schoolchildren and relevance for control. | although it is well recognised that both behavioural and environmental factors play a role in determining small-scale heterogeneities in schistosomiasis transmission, empirical evidence of their relative importance is often limited. a study was conducted around chaani, a village in northern unguja (zanzibar) where urinary schistosomiasis is endemic, in order to shed light upon the micro-epidemiology of schistosoma haematobium and patterns of infection within schoolchildren and the intermediate h ... | 2008 | 17996207 |
| host choice and penetration by schistosoma haematobium miracidia. | schistosome parasites commonly show specificity to their intermediate mollusc hosts and the degree of specificity can vary between parasite strains and geographical location. here the role of miracidial behaviour in host specificity of schistosoma haematobium on the islands of zanzibar is investigated. in choice-chamber experiments, s. haematobium miracidia moved towards bulinus globosus snail hosts in preference to empty chambers. in addition, miracidia preferred uninfected over patent b. globo ... | 2009 | 18922204 |