Background: Allergic rhinitis and asthma are the most common chronic inflammatory diseases affecting the respiratory tract. A subgroup of regulatory T cells, CD4+CD25+, participates in the control of allergic diseases.
Objetive: To determine if there is a difference in the number of peripheral blood regulatory T cells, identified as CD4+CD25+CD127low, of patients with rhinitis compared to healthy controls; if there is correlation of the number of these cells with other manifestations of the disease and if that number changes in the same individual after immunotherapy.