Mammalian apoptotic signalling pathways: multiple targets of protozoan parasites to activate or deactivate host cell death

Programmed cell death is an essential mechanism of the host to combat infectious agents and to regulate immunity during infection Consequently, activation and deactivation of the hosts' cell death pathways by protozoan parasites play critical roles in parasite control. pathogenesis, immune evasion and parasite dissemination within the host Here, we discuss advances in the understanding of these fascinating host-parasite interactions with special emphasis on how protozoa can modulate the cell death apparatus of its host. (C) 2009 Elsevier Masson SAS All rights reserved.