title: [Susceptibility of Aedes aegypti (L.) strains from Havana to a Bacillus thuringiensis var. israelensis].
abstract: BACKGROUND
  the integration of chemical and biological methods is one of the strategies for the vector control, due to the existing environmental problems and the concerns of the community as a result of the synthetic organic insecticide actions. The bacterium called Bacillus thuringiensis var. israelensis in liquid formulation has been widely used in the vector control programs in several countries and has shown high efficacy at lab in Cuba.
  
  
  OBJECTIVE
  to determine the susceptibility of Aedes aegypti collected in the municipalities of La Habana province to Bacillus thuringiensis var. israelensis.
  
  
  METHODS
  fifteen Aedes aegypti strains, one from each municipality, were used including larvae and pupas collected in 2010 and one reference strain known as Rockefeller. The aqueous formulation of Bacillus thuringiensis var. israelensis (Bactivec, Labiofam, Cuba) was used. The bioassays complied with the World Health Organization guidelines for use of bacterial larvicides in the public health sector. The larval mortality was read after 24 hours and the results were processed by the statistical system SPSS (11.0) through Probit analysis.
  
  
  RESULTS
  the evaluated mosquito strains showed high susceptibility to biolarvicide, there were no significant differences in LC50 values of Ae. aegypti strains, neither in the comparison of these values with those of the reference strain.
  
  
  CONCLUSIONS
  the presented results indicate that the use of Bacillus thuringiensis var. israelensis continues to be a choice for the control of Aedes aegypti larval populations in La Habana province.
authors: Instituto de Medicina Tropical "Pedro Kourí", La Habana, Cuba. zulema@ipk.sld.cu
authors: Zulema
authors: Z
authors: Menéndez Díaz
authors: Jinnay
authors: J
authors: Rodríguez Rodríguez
authors: René
authors: R
authors: Gato Armas
authors: Ariamys
authors: A
authors: Companioni Ibañez
authors: Manuel
authors: M
authors: Díaz Pérez
authors: Rosa Yirian
authors: RY
authors: Bruzón Aguila
mesh_terms: D000330:Aedes / Q000382:microbiology*; D000818:Animals; D001413:Bacillus thuringiensis / Q000502:physiology*; D003462:Cuba; D009032:Mosquito Control / Q000379:methods*; D010572:Pest Control, Biological / Q000379:methods*