Development, but especially evaluation of diagnostic tests. A lot of work underway on optimization of Helmintex (HTX), the most sensitive egg-detection method for schistosomiasis, based on the magnetic behavior of Schistosoma spp eggs. HTX improvements are centered: (i) concentration steps, with a 3D filtration device; (ii) fotonics methods (visible and infra-red) for detection of eggs in fecal sediments. Dynamics of transmission miracidia to snails, by computational and equational modeling