Résumé : This transversal case study aimed at drawing the biological profile of sensitized patients consulting for respiratory allergies at Mohamed V Military Hospital-Rabat. One hundred four patients were included in the case study, who have benefitted from specialized medical consultation and those who came to the biochemistry laboratory holding a medical check-up prescription for allergy (NFS and biochemical check-up). The biochemical analysis were made up of TMA Phadiatop
®, correct proportioning of specific IgE serum, and complete IgE. The different anamnestic and clinical parameters acting upon the sensitization to respiratory allergens have been collected through a multiple choice question survey. Statistical analysis has been performed by a SPSS software version 13.0. The Phadiatop
® was positive at 54.8% of our patients with a masculine predominance (H/F sex-ratio = 1.4). The recurring symptoms were the rhinitis (36.8%) and the asthma (10.5%). The allergen d1
Dermatophagoides pteronyssinus was the most incriminated pneumallergens (59.6%). For 19.3% of the patients sensitized, a polysensitization (superior to three) was noted, due to dust mite, cockroaches, pollen and animals. 93.6% of the Phadiatop
® positive patient had a hypereosinophilia (p < 0.001). The complete IgE had been prescribed to 29 patients and had been increased among 19 patients in 66% of the cases. Among the patients having a rate of elevated complete IgE, 8 (42.1%) had a negative Phadiatop
® (p = 0.019). Our survey showed the strong prevalence of the respiratory sensitization at our population. The allergen d1 is the most incriminated. It also put in evidence the weak diagnostic value of the dosage of the complete IgE in the respiratory allergy.