Cat sensitization provoking asthma and pulmonary infiltrates with eosinophilia.

We report a patient who developed asthma associated with exposure to cats. During his evolution he presented pulmonary infiltrates accompanied by eosinophilia in blood and sputum, hemoptysis and flu-like symptoms. The sera contained specific IgE and precipitating antibodies to cat epithelium. After a year without contact with cats, precipitating antibodies were negative, and a bronchial provocation test only demonstrated an immediate response.