1921
Volume 71, Issue 4
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645

Abstract

This study evaluated if the population in the city of Cali, Colombia was composed of genetically distinct local populations with different levels of insecticide resistance and dengue vector competence. Insecticide resistance was assayed biochemically and was associated with varying levels of mixed-function oxidases and non-specific esterases. The genes encoding those enzymes were under selective pressure from insecticides used to suppress populations. Vector competence showed heterogeneity among the vector populations ranging from 19% to 60%. Population genetic analysis of random amplified polymorphic DNA-polymerase chain reaction products, expressed as genetic distance, Wright’s F, and migration rate (Nm), demonstrated moderate genetic differentiation among from four sites (F = 0.085). The results from all characteristics evaluated in the study demonstrated spatial and temporal variation between populations. At any specific time, the local populations of were genetically differentiated and unique with respect to insecticide resistance and vector competence. Both characteristics changed independently.

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2004-10-01
2017-09-21
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  • Received : 16 Jun 2003
  • Accepted : 22 Oct 2003

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