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      Health risk assessment related to dermal exposure of chlorpyrifos: a case study of rice growing farmers in Nakhon Nayok Province, Central Thailand.

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          Abstract

          To date, pesticides, especially organophosphate pesticide such as chlorpyrifos, have been frequently applied to paddy fields over time to maintain product quality, protect agricultural crops from various pests, and increase yield. This study evaluates dermal exposure to chlorpyrifos in rice farmers along with providing a health risk assessment. Thirty-five rice farmers participated and completed an in-person interview, and patch technique was used to evaluate dermal exposure to chlorpyrifos. The chlorpyrifos residue was extracted from the gauze patches and quantified by gas chromatography equipped with flame photometric detector (GC-FPD). The results showed that chlorpyrifos concentrations were greater in males (526.34 ± 478.84 mg/kg) than females (500.75 ± 595.15 mg/kg). Average daily dose sampled from seven points on male and female farmers were 31.72 × 10(-4), 193.32 × 10(-4), 5.38 × 10(-4), 190.48 × 10(-4), 170.47 × 10(-4), 465.91 × 10(-4), and 43.04 × 10(-4) mg/kg-day. The hazard quotient (HQ) at the mean and 95th percentile level was found to be greater than acceptable (HQ > 1). Rice-growing farmers in this area may be at risk for adverse health effects due to continuous dermal exposure to chlorpyrifos from their improper use of personal protective equipment (PPE).

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          Author and article information

          Journal
          J Agromedicine
          Journal of agromedicine
          Informa UK Limited
          1545-0813
          1059-924X
          2014
          : 19
          : 3
          Affiliations
          [1 ] a International Postgraduate Programs in Environmental Management, Graduate School , Chulalongkorn University , Bangkok , Thailand.
          10.1080/1059924X.2014.916643
          24959761

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