Dengue and
dengue hemorrhagic fever,
vector-borne diseases transmitted by the
mosquito Aedes aegypti, are presently important
public health problems in
Brazil. As the strategy for
disease control is based on
vector control through the use of
insecticides, the development of resistance is a threat to programs
efficacy. The objective of this study was to compare the
Aedes aegypti susceptibility in nine vector
populations from the
state of São Paulo and seven from Northeast region of
Brazil, since there was a difference on group of
insecticide used between the areas.
Bioassays with
larvae and
adult were performed according to the
World Health Organization methods.The results showed higher resistance levels to
organophosphates group in
populations from the Northeast region where this group was used for both
larvae and
adult control than in São Paulo where
organophosphates were used for
larvae and pyretroids for
adult control. Resistance to pyretroids in
adults was widespread in São Paulo after ten years of use of cypermethrin while in vector
populations from the Northeast region it was punctual. The difference in resistance profile between the areas is in accordance to the group of
insecticide used.