Nail damage in spray operators exposed to paraquat.

Studies of the occupational exposure of Malaysian plantation workers to paraquat.

Studies carried out on the occupational exposure to paraquat of plantation workers in Malaysia comprised quantitative estimates of dermal and respiratory exposure of knapsack spray operators, carriers, and rubber tappers operating under their normal working conditions. Spray operators have been shown to be dermally exposed to paraquat by walking through recently sprayed vegetation and into thei...

Nail damage associated with handling of paraquat and diquat.

Damage and discoloration of the fingernails probably caused by contamination with concentrated solutions of paraquat and diquat are described in three patients. The cause of this damage is unknown, but is probably a local action.

Exposure of spray operators to paraquat.

Occupational exposure of Sri Lankan tea plantation workers to paraquat.

Absorption of the herbicide paraquat (1,1'-dimethyl-4,4'-bipyridinium) by mixer-loaders and spray operators on a Sri Lankan tea plantation was assessed over five consecutive days of spraying. Beginning on the day before spraying started and continuing for each of the five spraying days and for seven days after the last day of spraying, 24-hour urine samples were collected from each of the worke...

Paraquat Exposure of Knapsack Spray Operators on Banana Plantations in Costa Rica.

A study of occupational exposure to paraquat was performed among 11 knapsack spray operators at banana plantations in Costa Rica. External and internal exposures were quantified and determinants of exposure identified by measurements, observations, and interviews. Dermal exposure was measured with skin pads, respiratory exposure by personal air sampling, and internal exposure by urine sampling....