Review of Temephos Discriminating Concentration for Monitoring the Susceptibility of Anopheles labranchiae (Falleroni; 1926); Malaria Vector in Morocco

In Morocco; the resistance monitoring of Anopheles labranchiae larvae to temephos is done using discriminating concentration of 0.125?mg; which is half of the WHO recommended dose for Anopheles. However; this dosage seemed to be too high to allow an early detection of the resistance and its revision was found necessary. The present study was carried out during May-June 2008 and 2009 in nine provinces from the north-west of the country. The aim was to determine the lethal concentrations LC100 of temephos for the most susceptible populations and to define the discriminating dosage as the double of this value. The bioassays were conducted according to WHO standard operating protocol to establish the dose-mortality relationship and deduct the LC50 and LC95. The results of this study indicated that the LC100 obtained on the most susceptible populations was close to 0.05?mg/L. Therefore; the temephos discriminating dosage for susceptibility monitoring of An. labranchiae larvae in Morocco was set to be 0.1?mg

Review of Temephos Discriminating Concentration for Monitoring the Susceptibility of Anopheles labranchiae (Falleroni, 1926), Malaria Vector in Morocco.

In Morocco, the resistance monitoring of Anopheles labranchiae larvae to temephos is done using discriminating concentration of 0.125 mg, which is half of the WHO recommended dose for Anopheles. However, this dosage seemed to be too high to allow an early detection of the resistance and its revision was found necessary. The present study was carried out during May-June 2008 and 2009 in nine provinces from the north-west of the country. The aim was to determine the lethal concentrations LC100 of temephos for the most susceptible populations and to define the discriminating dosage as the double of this value. The bioassays were conducted according to WHO standard operating protocol to establish the dose-mortality relationship and deduct the LC50 and LC95. The results of this study indicated that the LC100 obtained on the most susceptible populations was close to 0.05 mg/L. Therefore, the temephos discriminating dosage for susceptibility monitoring of An. labranchiae larvae in Morocco was set to be 0.1 mg/L.

[Extension to the north of Morocco of the distribution area of Anopheles (Cellia) d'thali Patton, 1905]. / Extension vers le nord du Maroc de l'aire de distribution d'Anopheles (Cellia) d'thali Patton, 1905.

Anopheles (cellia) d'thali is generally classified as a mosquito of arid areas in the South and East Morocco. The northernmost station of this species at present in Morocco is the Moulouya valley. However we found An. d'thali during entomological investigations in the north of the country in the subhumid area of Chefchaouen. In Morocco, An. d'thali is therefore no longer a strictly desert species.

[The gonotrophic cycle of Culex pipiens (Diptera: Culicidae), West Nile virus potential vector, in Morocco: evaluation of its duration in laboratory]. / Cycle gonotrophique de Culex pipiens (Diptera: culicidae), vecteur potentiel du virus West Nile, au Maroc: estimation de la durée en laboratoire.

Culex pipiens gonotrophic cycle has been studied, for the first time in Morocco, under experimental conditions. Its average duration was estimated at 5.54 +/- 1.73 days.