Histological changes produced by exposure of rabbits and rats to smokes produced from red phosphorus

Rabbits and rats were exposed to single doses of smoke from pyrotechnic mixtures containing red phosphorus. The survivors were observed for up to 14 days. Most of the histological changes observed were found in the respiratory tract and they included abnormalities in the larynx and trachea, alveolitis and, in a few cases, frank pneumonia.