In a recent issue of Parasitology Today, Stanley and Virgin(1) have st
ressed the potential of B- and T-cell deficient mice, among which seve
re combined immunodeficiency (SCID) mice are most frequently used, as
models for the study of parasites. One of the most tantalizing prospec
ts has been in the development of liver stages (LS) of human Plasmodiu
m.