[Toxoplasma and toxoplasmosis].

Round table on toxoplasma and toxoplasmosis touch on treatment, pathogeny and involvement in biological diagnosis, antigenic structure and cellular immunity. The research of new toxoplasmicide molecules and that of pharmacological experimental models remain difficult. On the contrary, there is a large development in the parasitological diagnosis with PCR and in the immunological diagnosis with more targeted antigens produced by genetic engineering or by biochemical purification. A better knowledge of this antigenic structure will also enable to select protective molecules for vaccinations. This goal will be reached when our knowledge will be completed on the cellular immunity during toxoplasmosis.