Evaluation of claims that pigeon droppings caused chemical hypersensitivity pneumonitis (HP)


It was alleged that an employee of a railroad developed, a potentially fatal fibrotic lung disease, due to occasional, outdoor, workplace exposure to dried airborne pigeon droppings. An analyses of all published and case specific material indicated that inhalation of fungi, for the person involved in this case, if it occurred, was not causal for chemical hypersensitivity pneumonitis.