, Volume 8, Issue 1, pp 34-37

Evaluation of the age of onset of respiratory allergic symptomatology

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In order to evaluate the age of ouset of respiratory allergic symptoms we examined 2315 patients (656 children and 1659 adults) coming to our clinic as out patients. Each patient underwent the following diagnostic tests: anamnestic and clinical examination, skin-tests for the most common allergens and, when requested, Radioallergosorbent test (RAST) and specific and non specific BPT.

We selected 278 children and 673 adults for whom it was possible to establish (on the basis of precise anamnestic considerations) the age at which the respiratory symptoms first appeared.

Among these, 300 reacted only toParietaria pollen, 58 only to grass pollen, 420 only to house-dust mite, and 173 were not allergic.

Patients reacting to multiple allergens were excluded from the analysis.

The results of our study show a significant precocity of the onset of symptoms related to allergic sensitization to mites with peak level at 5 years.

On the other hand, the onset of pollen-related symptoms was later on (peak level at 20–25 years forParietaria pollen and 30–35 years for grass pollen). For non allergic patients we did not find a definite age of onset.