Oral corn pollen hypersensitivity in Arizona Native Americans: some sociologic aspects of allergy practice.

Thirty-three Navajo patients were seen in a private allergy consultation practice in Flagstaff, Arizona between 1978 and 1990. Sufficient skin test and historical data were available from nine atopic patients to evaluate hypersensitivity reactions to oral corn pollen used in the Navajo ceremonials. Six of the nine patients had positive skin test reactions to corn pollen and four of these six reported symptoms from oral corn pollen. The symptoms included various combinations of oral and ear itching, sneezing, cough, and wheezing. One corn pollen skin test-negative patient reported slight throat itching from the pollen. In no case did the patient or referring primary care physician associate the symptoms with ceremonial oral corn pollen use. This is the first report of hypersensitivity reactions to the ceremonial use of oral corn pollen in native Americans.