Abstract: 8-11-Mer peptides are identified, from four Plasmodium falciparum antigens, circumsporozoite protein, thrombospondin-related anonymous protein, spirozoite hepatocyte binding antigen and liver-stage antigen-1, as actual or potential cytotoxic T lymphocyte epitopes for human leucocyte antigen class I molecules HLA-A2, HLA-B8, HA-B7 and HLA-B17. Vaccines for immunization against malaria contain these peptides or oligonucleotides coding for them. A method of inducing primary cytotoxic T lymphocyte responses to a chosen antigen or microorganism comprises incubating lymphocytes ex vivo with the chosen antigen or microorganism in the presence of keyhole limpet haemocyanin.

Abstract: A method of identifying peptides of an antigen of interest which are capable of recognition by or induction of cytotoxic T lymphocytes, comprises the steps of: ascertaining a "motif" of peptides which bind to a chosen HLA class I allele; providing peptides having this motif which are present in the known sequence of the antigen of interest; screening the peptides using an HLA assembly assay; and screening the resulting peptides for recognition by or induction of cytotoxic T lymphocytes. The above peptides have been identified by this method, and the peptides and vaccines containing them are also claimed.