Species differences in the intrinsic clearance (CL(int)) and the enzymes involved in the metabolism of pyrethroid pesticides were examined in rat and human hepatic microsomes. The pyrethroids bifenthrin, S-bioallethrin, bioresmethrin, beta-cyfluthrin, cypermethrin, cis-permethrin, and trans-permethrin were incubated in rat and human hepatic microsomes in the presence or absence of NADPH. Metabo...

background: one approach for prevention of cutaneous leishmaniasis is creation of a barrier between the insect vector (phlebotomus) and the host.  many, but not all, researchers claim that permethrin-impregnated uniforms are effective for prevention of cutaneous leishmaniasis.  we determined the efficacy of permethrin-impregnated uniforms for prevention of cutaneous leishmaniasis among iranian ...

Hydraulically connected wetland microcosms vegetated with either Typha latifolia or Myriophyllum aquaticum were amended with an NH4NO3 and permethrin mixture to assess the effectiveness of both plant species in mitigating effects of the pollutant mixture on phytoplankton (as chlorophyll a) and Hyalella azteca. Phytoplankton grew in response to increased NH4NO3 in the presence of all plant speci...

The purpose of this study was to conduct a survey for the susceptibility of the horn fly, Hematobia irritans (L.), populations to permethrin on dairy cattle from Aguascalientes, Mexico. Samples of populations of horn flies at 25 dairies were exposed to two discriminating doses (2.5 and 6.0 microg/cm2) on permethrin-treated filter papers and the percentage of mortality was compared with that of ...

BACKGROUND Permethrin is a synthetic pyrethroid insecticide widely used in agriculture, in public health, and in many U.S. homes and gardens. OBJECTIVE In this study we evaluated the incidence of cancer among pesticide applicators exposed to permethrin in the Agricultural Health Study (AHS). METHODS A total of 49,093 pesticide applicators were included in this analysis of the AHS, a prospec...

Ambrosia beetles tunnel into the heartwood of trees where they cultivate and feed upon a symbiotic fungus. We assessed the effectiveness of flood stress for making Cercis canadensis L. and Cornus florida L. trees attractive to attack as part of insecticide and fungicide efficacy trials conducted in Ohio and Virginia. Since female ambrosia beetles will not begin ovipositing until their symbiotic...

Field tests evaluated repellent formulations containing deet in combination with permethrin-impregnated or untreated military uniforms against Aedes taeniorhynchus. No significant difference was determined between repellents in duration of protection whether or not permethrin-treated clothing was worn, but there were differences in efficacy relative to site of application. The head was the site...

Increased focus is being placed on the ability of native vegetation to mitigate potential harmful effects of agricultural runoff, especially pyrethroid insecticides. Replicate 379 L Rubbermaid tubs (1.25 m [l] x 0.6 m [w] x 0.8 m [h]) were planted with individual species of cutgrass (Leersia oryzoides), cattails (Typha latifolia), bur-reed (Sparganium americanum), and powdery alligator-flag (Th...

Aim: Demodex parasites have been linked to dermatological disorders, especially rosacea, without a proven mechanism. Moreover, some anti-Demodex agents demonstrate dual therapeutic effect related direct on the skin disorder along with decreased number of mites. Despite being considered first-line treatment approach for azelaic acid's efficacy against mites has not investigated. In current study...