Effect of Chlorine and Temperature on Larvicidal Activity of Cuban Isolates.

Background: The efficacy of biolarvicides may be influenced by species of mosquito, larval age and density, temperature, water quality, bacterial formulation, and others. The aim of this study was to evaluate the influence of temperature and chlorine on larvicidal activity of Cuban isolates against .

Methods: The influence of temperature (25, 30, 35 °C) and chlorine (2.

[Work environment assessment at a medical school].

Background: The work environment of an organization has to do with a set of permanent qualities that are experienced by its members.

Aim: To assess the work environment perception of faculty members of a Medical School in two different periods (2005 and 2007).

Material And Methods: A standardized survey was applied to faculty members and Department chairs of the academic units of our Medical School.

[Mode of inheritance of temephos (Abate) resistance in Aedes aegypti (Diptera: Culicidae) from Cuba].

A study on the mode of inheritance of temephos resistance was conducted using a temephos resistant Aedes aegypti reference strain (SAN-F6) with a value of resistance factor of 200x, compared with the insecticide susceptible Aedes aegypti strain (ROCKEFELLER). Genetic crossings were performed between temephos resistant and susceptible strains. An F1 crossing was attained.

[Status of resistance to insecticides and resistance mechanisms in larvae from Playa municipality collected during the intensive campaign against Aedes aegypti in Havana City, 2001-2002].

The levels of susceptibility and/or resistance to inseciticides in Aedes aegypti larvae collected at the municipality of Playa during the intensive campaign against the mosquito Aedes aegypti, in Havana City, in the present year, were determined. In larvae, it was found a high resistance to the organophosphate insecticides phention and temephos and moderate to fenitrothion. A high resistance to propoxur carbamate was also detected.

[Resistance to insecticides in larvae and adults of Aedes aegypti, Havana City: prevalence of A4 esterasa associated with resistance to temephos].

2 strains of Aedes aegypti from 2 people's councils with high indexes of infestation of this vector were studied due to the need of carrying out an effective control of larvae and adults in the municipality of Guanabacoa. The levels of susceptibility and/or resistance to organophosphate insecticides, pyrethroids and a carbamate were determined. The results of the bioassays in larvae showed a complete susceptibility to organophosphate insecticides, malathion, clorpirifos, methyl-pyrimifos and propoxur carbamate in both people's councils.