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Schistosomes are parasitic platyhelminths (flatworms) of birds and mammals. As a parasitic disease of humans, schistosomiasis ranks second only to malaria in global importance. Schistosome larvae (cercariae) must invade and penetrate skin as an initial step to successful infection of the vertebrate host. Proteolytic enzymes secreted from the acetabular glands of cercariae contribute significantly...
The performance of indirect haemagglutination assays (IHA), enzyme-linked immunosorbent assays (ELISA) and indirect immunofluorescent antibody tests (IFAT) were compared with 450 sera from a Schistosoma mansoni-endemic area in Burkina Faso. All participants in this survey provided at least one sample each of stool, urine and serum. From those with an egg-negative Kato–Katz thick smear, a second stool...
Skin invasion by schistosome cercariae was recently discussed in Trends in Parasitology. However, only Schistosoma mansoni was considered, possibly because this species predominates in laboratory studies (at least outside China). One may be tempted to extrapolate from the ‘model’ S. mansoni to other schistosomes, but Schistosoma japonicum must not be neglected. This schistosome is distinguishable...
DNA-based vaccine technology was used to induce an immune response in mice against a schistosome cysteine proteinase, asparaginyl endopeptidase (Sm32). The cDNA coding for Sm32 was cloned in a mammalian expression vector under control of the CMV promoter/enhancer and expressed for the first time in transfected mammalian cells as well as in mice immunized with the Sm32-encoding DNA construct. These...
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