[Candidiasis: molecular basis of parasitic adaptation of opportunistic pathogenic protists].

Candida albicans is a versatile organism living as a commensal of the gastro-intestinal tract and having the ability to invade host tissues and to initiate serious diseases under the appropriate environmental conditions. The molecular basis for adherence, invasion, interactions with specific and non-specific immune factors have been studied in parallel to structural characteristics of the yeast. The main parasitologic features are closely linked to phenotypic variations. In this respect, mannoproteins are strongly involved in the cell wall variations. The study of the oligomannosidic repertoire represents one of the essential steps for the understanding of host-parasite relationships.