[Characteristics of the signal transduction in parasitic lower eukaryotes].

The review summarizes current data about pathways of the signal transduction in parasitic unicellular eukaryotes at the initial stage of the invasion and during their intracellular adaptation, growth and replication. The role of the factors that influence virulence of the unicellular parasites is reviewed. A special attention is paid to aspects of intracellular communications of the parasites and host cells.