PRUEBAS CUTáNEAS, CON EXTRACTOS ALERGéNICOS DE áCAROS, EN PACIENTES ASMáTICOS DE LAS CIUDADES DE MACHALA (ECUADOR) Y DE CAMAGüEY (CUBA)

Background: The extracts of mites Dermatophagoides pteronyssinus, Dermatophagoides siboney and Blomia tropicalis produced in Cuba have been approved and registered for diagnosis and immunotherapy. Objective: Compare performance indicators of the prick test, in the cities of Machala and Camaguey, with extracts of mites developed at the National Center for Biological Preparations. Materials and methods: 40 asthmatics aged 5 years and under 60 Clinic "Medical Tower City of Machala and Camagüey Previsora respectively. Equal number of healthy volunteers of each of the services. Testing was performed in the anterior forearm, applying a drop of each extract at a concentration of 20 000 BU and monitoring of histamine and diluent solution. It punctured the skin through each drop, was read at 15 minutes, being positive when the wheal diameter was less than 3 mm. Results: Sensitivity to Dermatophagoides pteronyssinus, 77, 50 in Camaguey and 72.50 Machala and specificity of 80.00, for the Cuban city and 82.50 for Ecuador. Positive test to Dermatophagoides siboney in Camaguey n = 28 and in Machala n = 9 (p <0.05) in Camagüey sensitivity 70, 00 and 22.50 in Machala, while specificity was 82.50 and 95, 00 respectively. The sensitivity values were 72.50 Blomia tropicalis and specificity 70, 00 and 77, 50, and 85.00 respectively in Camaguey and Machala. Conclusions: The results of statistical indicators attest to the efficacy of mite prick test for diagnosing asthma.