The yellow fever mosquito, Aedes aegypti, transmits pathogens that aff
ect both humans and livestock, and has been the focus of extensive res
earch to identify genetic loci that may be useful in control strategie
s. Fluorescence in situ hybridization (FISH) and digital imaging micro
scopy have provided a rapid mechanism to populate the physical map wit
h probes derived from genetic markers, cDNAs and recombinant genomic l
ibraries. When the physical and genetic linkage maps are aligned, map-
based cloning will allow the rapid isolation of target genomic sequenc
es. The strategy of FISH mapping and the results of initial hybridizat
ion studies are reviewed here by Martin Ferguson, Susan Brown and Denn
is Knudson. An Ae. aegypti-specific genomic database, which collates d
ata from mapping studies, sequences, references and other relevant inf
ormation, is also discussed.