Genetic structure of Triatoma sordida (Hemiptera : Reduviidae) domestic populations from Bolivia: Application on control interventions

The genetic population of Triatoma sordida group 1, a secondary vector of C hagas disease in Bolivia, was studied by multi-locus enzyme electrophoresis . A total of 253 nymphal and adult specimens collected from seven neighbour ing localities in the Velasco Province, Department of Santa Crus were proce ssed The relatively low genetic variability was confirmed for this species (rate of polymorphism. 0.20). The absence of genetic disequilibrium detecte d within the seven localities was demonstrated. A geographical structuratio n appears between localities with distances greater than 20 km apart. Altho ugh T. sordida presents a relatively reduced dispersive capacity, its panmi ctic unit is wider- than compared with T. infestans. Genetic distances betw een T. sordida populations were correlated with geographic distance. Gene f low between geographic populations of T. sordida provides an efficient fram ework for effective vigilance and control protocols.