Chlorpyrifos fogger

This study was conducted to evaluate and compare ADD determined using whole-body dosimetry with results of two situational exposure studies conducted following use of a flea fogger under natural conditions. Chlorpy-rifos was selected due to its general availability as a fogger for indoor flea control. Chlorpyrifos is poorly absorbed by the dermal route and readily cleared from the body in urine (Nolan et al., 1984). Trichloropyridinol was measured in 24-hr urine specimens of the volunteers and was converted to chlorpyrifos equivalents as a measure of absorbed dose. The study provided an opportunity to determine the relationship between intensive, high-contact dosimetry studies and the amounts of chlorpyrifos absorbed by two sets of adults who re-entered fogger-treated homes. 

The total-release foggers (6 oz) contained chlorpyrifos (1.000%), piperonyl butoxide (0.100%), pyrethrins (0.050%), N-octyl bicycloheptene dicarboxim-ide (0.166%), and inert ingredients, including petroleum distillates (KRID , K-Mart Corp. Troy, MI). The aerosol cans were weighed before and after use to measure discharge. 

Table 1 CDFA Roller and Cotton Dosimeter Measurements of Chlorpyrifos at Several Distances from a Fogger Before and After Jazzercize Activity...

In our study, volunteers wearing either WBDs or bathing suits performed a set of choreographed Jazzercize routines on chlorpyrifos-treated carpet. These exercises at a low work level were designed to represent a maximum daily surface contact and transfer of chemicals such as pesticides. Results were similar to exposures of two sets of adults who used insecticide foggers in their homes. 

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