Occupational asthma due to unheated polyvinylchloride resin dust.

Occupational asthma due to unheated polyvinylchloride resin dust.

Polyvinylchloride (PVC) resins are widely used in industry. Asthma due to the thermal degradation products of PVC are well documented. In this first case of occupational asthma due to unheated PVC resin dust the patient was exposed to PVC resin dust during the mixing of chemicals used for making plastic seals for bottle caps.

Occupational asthma due to unheated colophony.

Occupational asthma due to tea dust.

Three patients are described who had developed asthma after working as tea packers. In two cases the diagnosis was confirmed by serial monitoring of peak expiratory flow rates, bronchial responsiveness to histamine, and specific inhalation challenges in the laboratory. The third patient experienced isolated changes in bronchial responsiveness to histamine after periods of exposure at work and a...

Occupational asthma due to formaldehyde resin dust with and without reaction to formaldehyde gas.

We report the cases of three subjects who developed asthma after being exposed to formaldehyde dust or gas. For two subjects, specific bronchial provocation tests with formaldehyde gas did not cause significant bronchoconstriction, whereas exposure to formaldehyde resin dust did. One subject experienced asthmatic reaction after being exposed to formaldehyde resin dust and gas. These findings su...

Occupational asthma due to formaldehyde.

Bronchial provocation studies on 15 workers occupationally exposed to formaldehyde are described. The results show that formaldehyde exposure can cause asthmatic reactions, and suggest that these are sometimes due to hypersensitivity and sometimes to a direct irritant effect. Three workers had classical occupational asthma caused by formaldehyde fumes, which was likely to be due to hypersensiti...