Abstract
A 31 year-old carpenter who had kept a rabbit in his living room for about 18 months was admitted because of recurrent asthmatic attacks. Laboratory findings revealed peripheral eosinophilia, markedly elevated serum IgE and positive serum precipitating antibody to rabbit hair. Skin tests confirmed that he was allergic to rabbit hair. Allergen inhalation provocation test was positive with a typical dual asthmatic response. Furthermore environmental exposure induced diffuse parenchymal shadows in his chest X-ray film which suggested PIE with asthma. We considered this case as an example of transition between bronchial asthma with late asthmatic response and PIE with asthma.