Asthma is a common problem that affects about 20 million peoples in India and can be often under-diagnosed or misdiagnosed. It can be allergic or non-allergic though the former type is more common and prevalent. Allergic asthma can be triggered by many allergens and house dust mites (HDM) are one of the common indoor allergens. The present study emphasizes the significance of house dust mites in allergic asthmatic subjects which is based on 115 asthmatic subjects in Punjab, India. For the quantification and the estimation of total serum Immunoglobulin E and HDM specific IgE, a mixture of 14 allergens and a mixture of two mite allergens viz. Dermatophagoides pteronyssinus and D. farinae were used respectively. Total and specific IgE levels were detected on ImmunoCAP Phadia 100. A statistically significant correlation between total and HDM specific IgE levels of 115 asthmatic subjects was found as compared to control group of 30 non-allergic individuals. The specific IgE levels of 54.78% subjects against the allergen of two mite species were found to be positive. Dust samples were taken from various localities of the houses to identify the diversity of house dust mites which were responsible for allergic asthma. Five common house dust mite species viz. D. pteronyssinus Trouessart, D. farinae Hughes, D. microceras Griffiths and Cunnington, D. aureliani Fain and Euroglyphus maynei Cooreman were identified from the dust. The present study observed that total IgE levels were higher with higher specific IgE levels against the mixture of two mite allergens viz. D. pteronyssinus and D. farinae in the blood serum. D. pteronyssinus was the most abundant and prevalent mite species followed by D. farinae. Therefore, present study concluded that HDM specific IgE levels against the mite allergen of D. pteronyssinus and D. farinae in the serum of allergic asthmatic subjects were found to be higher because of the higher prevalence of these two mites (D. pteronyssinus i.e. 69.80% and D. farinae i.e. 20.72%) in the house of allergic asthmatic subjects as compared to other identified mites.
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