Abstract
This study was designed to test the null hypothesis that the different level of the dorms has a real effect on the quantitative and qualitative existence of the house dust mites (HDM). Also to determine the most important factors that control the distribution and colonization of HDM. The study was conducted at Jeddah city western Saudi Arabia. 12 dorms were tested; 6 hotels and 6 motels. The samples were collected twice a month along three months (Dec, Jan., Feb. 2009). Mites were separated using modified Berleses tunnel. Ten species of HDM were extracted from studied dwellings. The mite assembelage in motels was dominated by Dermatophagoides pteronyssinus (23.7%). In hotels to the mite collection was co-dominated by D. pteronyssinus (27.6 %) and D. farinae (21.8 %). The mean total individuals in motels was 5012 individuals per 50 grams of dust in correspond to 2149 individuals per 50 grams of dust in the hotels. Up to 66.6% of the motels had a population of more than 100 individuals per 1 gram of dust, however non of the studied hotels embraced more than 50 individuals per 1 gram of dust. In conclusion the level of the dorms had a clear effect on the quantitative existence of HDM, but a qualitative effect can not be identified. Also, it was speculated that the most frequent cleaning as well as density and economic status of residents were the main factors matched with a direct impact on the mite contamination rate of the dorms. [Nada Othman Edrees. Prevalence of House Dust Mites in Two Levels of Dorms (Hotel and Motel) of Jaddah District Western Saudi Arabia. Life Sci J 2012;9(4):3673-3683]. (ISSN: 1097-8135). http://www.lifesciencesite.com. 545