label: Impaired lymphocyte transformation with phytohemagglutinin
label_lc: impaired lymphocyte transformation with phytohemagglutinin
description: "Normal peripheral blood lymphocytes, when stimulated by phytohemagglutinin (PHA) are cytotoxic for homologous and heterologous cells but not for autologous cells in monolayer culture. The cytotoxic effect is thought to be indicative of the immunological competence of the lymphocytes."