Pesticide dermal absorption: Case study x In vitro study

Publication date: Available online 17 December 2019Source: Environmental Toxicology and PharmacologyAuthor(s): Thalita Pedon de Araujo Cardoso, José Wellithom Viturino da Silva, Juliana Kishishita, Cheila Nataly Galindo Bedor, Danilo Cesar Galindo Bedor, Davi Pereira de Santana, Leila Bastos LealAbstractIn order to evaluate dermal absorption during typical working conditions in family farming, the amount of dimethoate on clothing and in the stratum corneum (SC) was measured in three rural workers. This was achieved by using cotton patches on the worker’s clothes and SC quantification by the tape stripping approach. To mimic the above study, an in vitro approach was performed using Franz cells by applying dimethoate (0.4 and 1.8 µg) direct to pig skin or, on a section of cotton before contact with pig skin. The in vivo case results demonstrated the high levels and variability of agrochemicals to which these farmers are subjected, with the total potential dermal absorption between 0.87-2.85 mg/person/h and the estimated SC penetration factor (PF) between 0 – 54.0 and 0- 28.9% for the back of the neck and the arms respectively. This probably demonstrates the impact of correct protective clothing. For the in vitro study, the amount of pesticide retained in the SC was 52.63 ± 10.73and 135.15 ± 31.8 ng/cm2 after applying 0.4 and 1.8 µg of pesticide directly on SC, and demonstrated close agreement with the in vivo approach. Further studies performed with thi...
Source: Environmental Toxicology and Pharmacology - Category: Environmental Health Source Type: research