suggesting that E. histolytica undergoes meiosis. Several other genes involved in both mitotic and meiotic HR are also present in E. histolytica. HR is enhanced under stressful growth conditions (serum starvation) concomitant with the up-regulation of HR-related genes. Also, UV irradiation induces DNA damage in E. histolytica trophozoites and activates the recombinational DNA repair pathway. In particular, expression of the Rad51 protein (a recombinase) is increased about 15-fold by UV treatment. See also List of parasites (human) References External links Entamoeba histolytica image library Entamoeba histolytica – Centers for Disease Control and Prevention CDC DPDx Parasitology Diagnostic Web Site LSHTM [http://entamoeba.lshtm.ac.uk/ ''Entamoeba Homepage] 'Entamoeba' Genome Resource – AmoebaDB Entamoeba histolytica article from the US Food and Drug Administration's Bad Bug Book'' Conosa Parasitic amoebozoa Taxa named by Fritz Schaudinn