scholarly journals Effects of Relative Humidity on the Population Growth of House-Dust Mites.

2000 ◽  
Vol 19 (4) ◽  
pp. 201-203 ◽  
Author(s):  
Yuichiro Oribe ◽  
Yoshifumi Miyazaki
Keyword(s):  
Relative Humidity ◽  
Population Growth ◽  
House Dust ◽  
House Dust Mites ◽  
Dust Mites

scholarly journals Population Growth and Allergen Content of Cultured Euroglyphus maynei House Dust Mites

2015 ◽  
Vol 166 (4) ◽  
pp. 267-272 ◽  
Author(s):  
Marjorie S. Morgan ◽  
DiAnn L. Vyszenski-Moher ◽  
Larry G. Arlian
Keyword(s):  
Population Growth ◽  
House Dust ◽  
House Dust Mites ◽  
Dust Mites ◽  
Allergen Content ◽  
Euroglyphus Maynei

Feeding Interactions Between Microorganisms and the House Dust Mites Dermatophagoides pteronyssinus and Dermatophagoides farinae (Astigmata: Pyroglyphidae)

2019 ◽  
Vol 56 (6) ◽  
pp. 1669-1677 ◽  
Author(s):  
Vit Molva ◽  
Marta Nesvorna ◽  
Jan Hubert
Keyword(s):  
Population Growth ◽  
House Dust ◽  
Dermatophagoides Pteronyssinus ◽  
Mite Species ◽  
Fungal Species ◽  
House Dust Mites ◽  
Dust Mites ◽  
Dermatophagoides Farinae ◽  
Microbial Species ◽  
Feeding Interactions

Abstract The feeding interactions between house dust mites (HDM) and microorganisms are key factors in the survival of mites in human environments. The suitability of different microbes for HDM is not known. Here, microbial species isolated from HDM cultures were offered to HDM in food preference tests under laboratory conditions. The microbial species were added to the rearing diet of mites to reach 7% of Saccharomyces cerevisiae and 10% of each tested microorganism. The suitability of each microbe-supplemented diet for Dermatophagoides pteronyssinus and Dermatophagoides farinae was compared in terms of mite population growth and mite preference in a cafeteria test. The effect of mite feeding on the respiration of microorganisms in the diet was observed in microcosms. HDM were able to feed and reproduce on some bacterial and fungal species, but the suitability of microbial species differed. Increasing the yeast Sa. cerevisiae in the diet from 7 to 17% appeared the most suitable for both mite species. Staphylococcus spp. bacteria were preferred for D. farinae and were suitable for reproduction. The population growth and feeding preferences of D. pteronyssinus and D. farinae with respect to microorganisms indicate that D. farinae can develop on a diet with bacterial (Staphylococcus nepalensis and Staphylococcus kloosii) additions, whereas D. pteronyssinus was successful on a diet with fungal (Aspergillus jensenii and Aspergillus ruber) additions. The bacteria Kocuria rhizophila and Bacillus cereus decreased population growth in D. pteronyssinus, whereas the yeasts Hyphopichia pseudoburtonii, Hyphopichia burtonii, and Candida ciferrii decreased population growth in D. farinae. These results indicate that some microorganisms are an important food source for HDM.

scholarly journals Effectiveness of house dust mite acaricide tri-n-butyl tin maleate on carpets, fabrics and mattress foam: a standardization of methodology

2006 ◽  
Vol 48 (3) ◽  
pp. 171-174 ◽  
Author(s):  
Satiko Uehara ◽  
Marcia Regina Franzolin ◽  
Soledad Chiesa ◽  
Débora Moreira ◽  
Walderez Gambale ◽  
...  
Keyword(s):  
Relative Humidity ◽  
House Dust ◽  
House Dust Mite ◽  
Culture Medium ◽  
Petri Dish ◽  
Dermatophagoides Pteronyssinus ◽  
House Dust Mites ◽  
Dust Mites ◽  
Optimal Conditions ◽  
Dust Mite

The aim of this study was to determine the effectiveness of the acaricide tri-n-butyl tin maleate, industrially applied to samples of carpets, mattress foam, and fabrics used for furniture upholstery, soft toys and shoe uppers. Approximately 100 adult house dust mites of the species Dermatophagoides pteronyssinus were inoculated into a Petri dish containing the sample (a piece of carpet, mattress foam, or fabric), treated with the acaricide, randomly collected. Mite-maintenance culture medium was added on top of each sample. After one, two, three, seven and 30 days of incubation at 25 ºC and 75% relative humidity, each dish was examined using a 40X stereoscopic microscope (40X). One hundred percent acaricide effectiveness was obtained in treated materials by the end of the 30th-day postinoculation period, under optimal conditions for mite maintenance.

Correlation Between Density of House Dust Mites and Recurrence of Urticaria

2019 ◽  
Vol 8 (3) ◽  
pp. 511
Author(s):  
Gardenia Akhyar ◽  
Rahma Ledika Veroci
Keyword(s):  
Skin Prick Test ◽  
House Dust ◽  
House Dust Mites ◽  
Dust Mites ◽  
Prick Test

Beberapa kasus urtikaria pada paparan debu dan diantaranya menghubungkan sensitivitas tungau debu rumah (TDR) dengan urtikaria berdasarkan riwayat pasien dan pemeriksaan uji intradermal. Tujuan penelitian ini adalah menentukan korelasi antara kepadatan TDR dan rekurensi urtikaria. Jumlah sampel pada penelitian ini 30 orang. Kepadatan TDR dari tiap kamar sampel dihitung dengan mengumpulkan debu, dan sampel dinilai sensitivitas terhadao TDR dengan pemeriksaan skin prick test (SPT). Diagnosis urtikaria berdasarkan anamnesis, kemudian ditanyaan rekurensinya dalam tiga bulan terakhir. Hasil: Dari 30 peserta, tujuh (23,3%) sampel memiliki kepadatan TDR sedang sementara 23 (76,7%) memiliki kepadatan rendah. Selain itu, 15 sampel positif SPT terhadap alergen TDR. Dari anamnesis, 12 (40%) sampel didiagnosis urtikaria dan diantaranya, 11 orang (91,67%) positif terhadap SPT. Tidak ada sampel yang memiliki rekurensi urtikaria dalam tiga bulan terakhir. Kesimpulan: Meskipun penelitian ini tidak menunjukkan korelasi yang signifikan antara kepadatan TDR dan tingkat kekambuhan urtikaria (p> 0,05), TDR memang bisa memicu eksaserbasi. Penelitian ini membutuhkan penyelidikan lebih lanjut dengan ukuran sampel yang lebih besar.

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