The Effects of Micro-Environmental Factors on the House Dust Mite

  • Jo, Wan-Je (Graduate School of Architectural Engineering, Hanyang University, Housing & Urban Research Institute, Korea National Housing Corp.) ;
  • Sohn, Jang Yeul (Graduate School of Architectural Engineering, Hanyang University)
  • Received : 2007.07.21
  • Published : 2007.12.30

Abstract

The proliferation of the House Dust Mite(HDM) is affected by temperature, humidity, ventilation, etc. Measuring temperature and humidity was performed at the very location where dust samplings take place and where they live in reality together with temperature and humidity of the ambient of the room. There has been discussion over the key environment factor of HDM survival; absolute humidity or relative humidity. It seems that relative humidity is the more important determinant for the mite's survival through the analysis of previous studies. Temperature, humidity, ventilation rate and Der P1 were measured in 4 flats in London. Mite allergen was detected in every house. Levels of Der P1 varied between <100ng/g and 22,778ng/g. Flats with high relative humidity(>50%) and poor ventilation(<0.5ach) showed higher levels of mite allergen than flats with lower humidity and adequate air change rate. Questionnaire survey was conducted and the result helped to confirm the findings from monitoring of environmental factors and the dust sampling.

Keywords

References

  1. Arlian, L. G. (1992), 'Water balance and humidity requirements of house dust mites', Experimental and Applied Acarology, 16: 15 https://doi.org/10.1007/BF01201490
  2. Cunningham M. J.(1996), 'Controlling dust mites psychrometrically - a review for building scientists and engineers', Indoor Air Vol.6(4); 249-258 https://doi.org/10.1111/j.1600-0668.1996.00004.x
  3. Ellingsen, I. J.(1978) Oxygen consumption in active and quiescent protonymphs of the American dust mites. J. of Insect Physiologies; 24: 13-16 https://doi.org/10.1016/0022-1910(78)90005-7
  4. Gustafsson D. et. al. (1996), 'Significance of indoor environment for the development of allergic symptoms in children followed up to 18 months of age', Allergy 51; 589-795 https://doi.org/10.1111/j.1398-9995.1996.tb04675.x
  5. Hallas T. E.(1991) The biology of mites. Allergy 1991; 46 Suppl. 11: 6-9 https://doi.org/10.1111/j.1398-9995.1991.tb00641.x
  6. Harving H., Korsgaard J. and Dahl R., (1993), 'House dust mites and associated environmental conditions in Danish homes', Allergy 48; 121-126
  7. Korsgaard J. (1983), 'Preventive measures in mite asthma, A controlled trial', Allergy 38; 93-102 https://doi.org/10.1111/j.1398-9995.1983.tb01592.x
  8. Korsgaard J. (1991), 'House dust mites and absolute indoor humidity', Allergy 38(2)
  9. Masuda S., K. et. al. (1996), 'Mite allergen levels in dust from carpeted floors in schools', IAQ conference I
  10. Munir A. K. M. et. al. (1995) 'Mite allergens in relation to home conditions and sensitization of asthmatic children from three climatic regions', Allergy 50(1) https://doi.org/10.1111/j.1398-9995.1995.tb02476.x
  11. Platts-Mills TAE, et. al., (1983), 'The role of dust mite allergens in atopic dermatitis', Clin Exp. Immunol. 8;233-248
  12. Sesay H. R., Dobson R. M. (1972), 'Studies on the mite fauna of house dust in Scotland with special reference to that of bedding' Acarologia 14, 384-92
  13. Smith, L. and Tuckett, C.(1996) Strategy for the control of indoor air pollution in UK homes. IAQ conference 1996; Vol. 3: 525-530
  14. Whitrow, D.(1995) House dust mites; How they affect asthma, eczema, and other allergies. UK: Right Way