Mites and allergy.

Veronika Hrabcová Allergy and house dust mites. Bachelor thesis Charles University in Prague, Faculty of Pharmacy in Hradec Králové Healthcare bioanalytics - Medical Laboratory Technician Background: Based on the literature we attempted to clarify the effect of moisture and temperature on the population of mites in dwellings. What are the mechanisms that reduce house dust mites and whether in the past fluctuating temperature and blankets freezing influenced the incidence of allergy. Main findings: The population of mites affecting many different factors, the most important are temperature and humidity. Mites D. pteronyssinus preferred the conditions of 23 ř C and 75% relative humidity (RH). During the winter, we can commonly found in homes average humidity around 25-45% RH. Through the day, mites are exposed to the fluctuating humidity, which are relatively well adapted. In combination with temperature, it is possible to create an unfavorable environment for their development and survival. When temperature increases, RH decreases below critical threshold humidity (CEH - Critical equilibrium humidity) and the mites are unable to obtain water from the ambient environment and thus complement their losses due to evaporation. Similar conditions apply as well in the air mattresses. On these principles..