WEDNESDAY, May 27 (HealthDay News) -- A 62-year-old Spanish woman who for 20 years sold lottery tickets in a kiosk in Madrid developed asthma soon after she started using a point-of-sale terminal to print the winning or losing tickets.
The cause, researchers suggest in the May 28 issue of the New England Journal of Medicine, was exposure to chemicals emitted by the new device.
"These machines are used everywhere, for example, to pay with credit cards in a restaurant or in any shopping center, said Dr. Joaquin Sastre, senior author of the study and a professor at Fundacio Jimenez Diaz Allergy Service in Madrid. These terminals are used everywhere in the world."
The machines print on thermal paper coated with a chemical called N-propyl-acrylamide and acrylate tints. "After performing all tests, we demonstrated that our patient was sensitized, meaning she is allergic to a specific substance, in this case, acrylates contained in the thermal paper," Sastre said.
According to the researchers, acrylates have caused occupational asthma affecting printing-facility employees, among others.