Effect of indoor pollutants exposure on symptoms of 315 patients allergic to mite.
Saturday, March 3, 2018
South Hall A2 (Convention Center)
Edouard Virot, Martine OTT, Audrey Dazy, Anh Poirot, Julien Godet, Frederic J. de Blay, MD

It has been demonstrated that home visit are useful in the treatment of allergic patients with a rhinitis and/or asthma. Cluster analysis of asthmatic patients suggest that environment control seems to be more efficient in subgroups of children.

Aim: To assess the indoor pollutants exposure and symptoms in mite allergic patients with rhinitis and/or asthma


315 mite allergic patients (mean age: 26.4) with rhinitis and/or asthma had a home visit with a Medical Indoor Environment Councelor (MIEC). They were living in urban and non-urban areas.

The asthma symptoms were graded with GINA guideline and ARIA for rhinitis. A cluster analysis of the dwellings was performed using 42 indoor environmental variables to identify patient’s domestic exposure.


75% of the patients was asthmatic (237) and 60% were rhinitic. Three main clusters of dwellings were defined: A and B were urban and C non urban. Cluster A,was associated with asthma (85%) and 37% with rhinitis. Patients were significantly more exposed to cockroach, essential oils, indoor perfumes and environmental tobacco smoke. In cluster B, patients were rhinitics (100%) and more exposed to allergens. The results were similar with children.


Our results underline the importance of a home visit. Despite the same medical diagnosis, the patients were not exposed to the same environment and indoor chemicals appeared to be important in the occurrence of asthma