Long-term study on the susceptibility to Trypanosoma congolense infectionsand genetics of colonized Glossina pallidipes from allopatric populations in Kenya

Two colonies of Glossina pallidipes originating from the Shimba Hills and N guruman, Kenya, were examined for their susceptibility to two strains of Tr ypanosoma congolense and for allele frequencies at eight polymorphic loci. These data were compared with data from earlier studies of these colonies. Overall, the two colonies of G. pallidipes were found to have lost, over 3- 4 years, most of the genetic and trypanosome-susceptibility characteristics that originally distinguished them.