Publication: Dust mite infestation in cooking flour: Experimental observations and practical recommendations
Issued Date
2015-06-01
Resource Type
ISSN
22288694
0125877X
0125877X
Other identifier(s)
2-s2.0-84944887147
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Asian Pacific Journal of Allergy and Immunology. Vol.33, No.2 (2015), 123-128
Suggested Citation
Sasikarn Suesirisawad, Nat Malainua, Anchalee Tungtrongchitr, Pantipa Chatchatee, Narissara Suratannon, Jarungchit Ngamphaiboon Dust mite infestation in cooking flour: Experimental observations and practical recommendations. Asian Pacific Journal of Allergy and Immunology. Vol.33, No.2 (2015), 123-128. doi:10.12932/AP0484.33.2.2015 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/36103
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Dust mite infestation in cooking flour: Experimental observations and practical recommendations
Other Contributor(s)
Abstract
© 2015, Allergy and Immunology Society of Thailand. All rights reserved. Background: The first documented case of oral mite anaphylaxis has recently been reported in Thailand, with mites possibly originating from cooking flour. Objective: Our study was designed to assess the effects of cooking flours enhancement and storage conditions on mite proliferation and to provide practical recommendations to prevent mite anaphylaxis.. Methods: In a factorial experiment, six commercial brands of cooking flours were selected and either inoculated or set free of mites and stored in one of the four containers chosen for the study: original package, plastic bag, plastic box and glass bottle. The resulting experimental units where then stored at either room temperature or in a refrigerator (+4C). In order to determine levels of Der f 1 allergen, 0.1 gram of flour was sampled from each experimental unit and tested by ELISA. Sampling was carried out immediately after inoculation and subsequently at week 2, 4, 6, 8, 10, 12, 16 and 20. Results: Levels of Der f 1 allergen in the inoculated samples increased significantly in all conditions 6 weeks after inoculation (p <0.001) and reached the highest levels at week 8. While experimental units left at room temperature showed higher levels of mite growth (p <0.001), no statistical differences were found among types of containers. The highest amount of Der f 1 was observed for Gogi, followed by Gold Label, tempura flour, corn flour, wheat flour and tapioca starch, respectively (p <0.01). Conclusions: In the context of our experiment, mites preferably grew in cooking flours containing high amounts of wheat at room temperature, particularly after 8 week of storage. According to our results, we thus advise to keep household cooking flour refrigerated and while the type of container does not matter, storage should not exceed 20 weeks.