[Skin hypersensitivity: intradermal hypersensitivity to allergen extracts and its relation to the place of residence].

A retrospective review of 308 clinical files of patient to respond at immunological and clinical allergic service of the Centro Medico 20 de Noviembre, ISSSTE for suffer with allergica illnes, realized by aeroalergens sensitization and determination frequency (intradermoreactions mediated) and relation to area living. The patients was highly sensitive at dust and dermatophagoides (75 and 40% respectively) others aeroalergen caused sensitization in the Capriola dactylon (37%), Amarantus palmieri (35.5%), Fracxinus (34.6%), Ambrosia elatior (33%), Candida (21.4%), Penicillium (18.1%), Mucor y Rizopus (17.8% each one).