The incidence of mosquito-borne human diseases is increasing worldwide, with effective chemical control limited due to widespread insecticide resistance in the insect. Recent evidence also suggests that bacterial symbionts of mosquitoes, known to be essential in nutritional homeostasis and pathogen defense, may play a significant role in facilitating mosquitocide resistance. Here, I examined th...

there is a great concern about the effect of propoxur, as one of the more common n-methyl carbamate pesticides, on human health due to its extensive use in agricultural and non-agricultural applications. caco-2 cells became resistant to propoxur, and the resistance was confirmed through mtt assay. then the cell membrane integrity and p-glycoprotein expression were measured by ldh assay and west...

Although synergism between pesticides has been widely documented, the physiological mechanisms by which an insecticide synergizes another remains unclear. Toxicological and electrophysiological studies were carried out on two susceptible pest species (the mosquito Culex quinquefasciatus and the cockroach Periplaneta americana) to understand better the physiological process involved in pyrethroi...

OBJECTIVES This study presents criteria for assessing the individual pesticide burden of workers in the chemical industry. METHODS A group of 1003 workers exposed to methylparathion or ethylparathion (alkyl phosphates), propoxur (carbamate), or cyfluthrin (pyrethroid) was investigated. After exposure to methylparathion or ethylparathion the methylparathion or ethylparathion and methylparaoxon...

The efficacy of insecticide mixtures of permethrin (pyrethroid) and propoxur (carbamate) was tested by larval bioassays on two strains of Culex quinquefasciatus (Say), one resistant to pyrethroids and the other resistant to carbamates. The method consisted in combining one insecticide at the highest concentration causing no mortality (LC0) with increasing concentrations of the second one. The c...

This study aims to investigate changes in resistance insecticides over a ten-year period five strains of German cockroaches, Blattella germanica (Linnaeus), which had previously shown deltamethrin, propoxur, and fipronil 2012. The were reared laboratory without exposure for ten years. In 2022, they tested the same using topical application method. ratio (RR50) was calculated each strain determi...

A highly selective, sensitive and rapid spectrophotometric method for the determination of propoxur in grain and vegetablesamples is proposed. Thedetermination is based on the hydrolysis of propoxur to o-propoxyphenol, its diazotisation and subsequent coupling with p-ami nobenzoic acid, to give a yellow orange dye having absorption maximum at 470 nm. The method is quantitative and reproducible ...

Adult bioassay was conducted in the laboratory on two populations of Culex fuscocephala, a vector of Japanese encephalitis (JE) in India, against two organochloride compounds (DDT and dieldrin), an organophosphate compound (malathion), a carbamate pesticide (propoxur) and two synthetic pyrethroids (deltamethrin and cyfluthrin) using WHO techniques. The adult populations from Mandya an irrigated...

Two novel mechanisms of organophosphate resistance were isolated and characterized from a population of Culex pipiens L. from Cyprus. Two strains, one expressing the novel, highly active esterases A5 and B5 (strain A5B5-R), and one expressing insensitive acetylcholinesterase (strain Ace-R), were developed by single pair crosses and selection with temephos and propoxur, respectively. The A5B5-R ...

Propoxur and methyl parathion are nonsystemic insecticide used for the control of various chewing and sucking insects. Exposure to these pesticides may cause genotoxic effects in nontarget organisms including man. In the present set of investigations, mutagenicity of pesticides propoxur and methyl parathion was studied by applying dominant lethal test (DLT) on quinquefasciatus taken as an exper...