[The efficacy of controlling of house dusts in attacks of mite sensitive asthmatics]

Abstract

Objective: To study the effect of controlling of house dusts in attacks of mite sensitive asthmatics (DMSA).

Methods: Dust in mattresses, sofas, beddings and pillows were calculated for 43 cases of DMSA every season meanwhile the asthmatic symptoms, amount of drugs taken, PEF value in morning and evening were daily recorded by patients, then the patients were divided into two groups i.e. treatment group (A group, 22 cases) and no treatment group ( B group, 21 cases) randomly. The controlling measures included well-ventilation, washing clothes and bedclothes and catching dust frequently and exposing of clothing or bedclothes in the sun.

Results: Correlation was found between house dust density and asthmatic attacks. The number of dust mites was lower after treatment than before in A group [(N/g): spring 62 vs 103, summer 105 vs 132, autumn 163 vs 231, winter 9 vs 13]. Concomitant asthmatic symptoms and amount of drugs taken and total IgE reduced [(0.6 vs 1.6) mg/L] and PEF values or PEF difference improved.

Conclusion: Control of dust mites growth could alleviate the asthmatic symptoms and decrease the attacks.