From The School of Biomedical Sciences Wiki
Also known as a killer T-cell. These cells kill host cells that have become infected by some sort of intracellular pathogen .
The cytotoxic T-cells can trigger an endogeneous pathway within the target cell leading to apoptosis. This is due to the cytotoxic T-cells releasing "preformed effector molecules" 
- ↑ alberts, B (2008). molecular biology of the cell. USA: garland science. glossary
- ↑ Janeway CA Jr, et al.;2001
- ↑ Janeway C. Immunobiologie. 5th ed. Paris: De Boeck; 2003.