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Der p 1 is the main allergen of house dust mite Dermatophagoides pteronyssinus, which has routinely been detected in residential dust. However, the procedure for extracting Der p 1 from reservoir dust has not been well defi ned. The aim of this study was to compare Der p 1 mass fractions in dust extracts prepared using the following extraction buffers: phosphate (pH 7.4), borate (pH 8.0), and ammonium bicarbonate (pH 8.0), all with 0.05 % Tween 20. Twenty-eight dust samples were divided into three aliquots and each portion was extracted with one of the three buffers at room temperature. Der p 1 mass fractions were measured in a total of 84 dust extracts using the enzyme immunoassay (range: 0.1 μg g-1 to 7.53 μg g-1). Statistical methods including intraclass correlation showed a high agreement between Der p 1 mass fractions irrespective of the extracting medium. Our results suggest that all three buffers are suitable for the extraction of mite allergens and routine Der p 1 analysis in dust.


Asthma and allergic rhinitis are common in childhood. Establishing sensitization to aeroallergens is crucial to effectively prevent exacerbation of these respiratory allergic diseases. The study aimed to evaluate sensitization to the most common aeroallergens in children with asthma and allergic rhinitis.We establishedacorrelation between patients sensitized to indoor, outdoor and simultaneously to both allergens. The study population consisted of 276 patients (168 boys and 108 girls) ages 4 to 16 years with asthma (A) and allergic rhinitis (AR). Skin prick tests were performed with 21 commercial allergen extracts: pollens, mites, epithelia and insects, and molds. We found that 217 patients were sensitized to at least one aeroallergen: 117 patients hadapositive result to mites, 92 to pollens, 72 to epithelia and insects, and 63 - to mold allergens. Dermatophagoides pteronyssinus was the most prevalent aeroallergen. Sensitized only to indoor allergens were 104 patients, 60 - only to outdoor allergens, and 53 were sensitized to both. Mites were the most frequent aeroallergens in children with Aand AR. Lately there has been foundasignificant increase in rates of sensitization to mold allergens, especially to Alternaria alternata. Our study has confirmed the dominant role of indoor allergens in children with respiratory allergic diseases.

Determination of mite Allergens in House Dust Using the Enzyme Immunoassay

The aim of this study was to determine the level of two major mite allergens Dermatophagoides pteronyssinus (Der p 1) and Dermatophagoides farinae (Der f 1) in 30 urban homes in Zagreb, Croatia, using the enzyme immunoassay with two monoclonal antibodies which has been established as the reference method for indoor allergen analysis. Dust samples were taken by vacuuming a carpeted area and collected on cellulose filters. The ranges of Der p 1 and Der f 1 were (0.1-12.5) μg g-1 (median 0.32 μg g-1) and (0.1-31.2) μg g-1 (median 0.35 μg g-1), respectively. Der p 1 and Der f 1 (>2 μg g-1) associated with increased risk of sensitization to mite allergens were found in approximately 16% homes for each allergen. The sum of allergen (Der p 1 + Der f 1) exceeded the lower threshold in 27% of homes. Analytical evaluation of the ELISA assay showed satisfactory results for precision (intra-assay CV <6.9%, inter-assay CV<13.3%), accuracy (91% to 93%), and sensitivity (2 ng mL-1).

The ELISA assay for the measurement of dust mite allergens demonstrated very good analytical characteristics for routine laboratory use, and will provide the essential basis for our future studies of various indoor allergens.

17. Liao E-C, Lin Y-H, Tsai J-J. Detection of group 2 Dermatophagoides pteronyssinus allergen for environmental monitoring of dust mite infestation. BioScience Trends 2013;7(2):82-8. doi: 10.5582/bst.2013.v7.2.82 18. Macan J, Kanceljak-Macan B, Milković-Kraus S. Pyroglyphid mites as a source of work-related allergens. Arh Hig Rada Toksikol 2012;63:57-66. doi: 10.2478/10004-1254-63-2012-2133

Memorial Hospital from June 2010 to December 2011 were enrolled. The diagnostic criteria for persistent allergic rhinitis followed the classification of Allergic Rhinitis and its Impact on Asthma (ARIA) 2008 [ 7 ]. The eligibility criteria included adults, aged between 18 to 60 years old, diagnosed with persistent allergic rhinitis, having skin prick test positive to Dermatophagoides pteronyssinus , and being healthy without any chronic underlying diseases. Exclusion criteria included dermatographism, active rhinosinusitis, pregnancy, lactation, having any psychiatric

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dust mite, cat, dog and cockroach allergens in British hospitals. Clin Exp Allergy 1998;28:53-9. Babe KS, Arlian LG, Confer PD, Kim R. House dust mite ( Dermatophagoides farinae and Dermatophagoides pteronyssinus ) prevalence in the rooms and hallways of a tertiary care hospital. J Allergy Clin Immunol 1995;95:801-5. Simplicio EC, Silva DA, Braga IA, Sopelete MC, Sung SJ, Taketomi EA. Mite and pet allergen exposure in hotels in Uberlândia, Nidwestern Brazil. Indoor Air 2007;17:278-83. Abramson SL, Turner-Henson A, Anderson L, Hemstreet MP, Bartholomew LK, Joseph CL

-007-9068-z. Cranham J.E., Helle W. 1985. Pesticide resistance in Tetranychidae. In: Helle W., Sabelis M.W. (Eds.), Spider mites: Their biology, natural enemies and control. Elsevier, Amsterdam, The Netherlands, pp. 405–421. Dermauw W., Van Leeuwen T., Vanholme B., Tirry L. 2009. The complete mitochondrial genome of the house dust mite Dermatophagoides pteronyssinus (Trouessart): a novel gene arrangement among arthropods. BMC Genomics 10; 107, 20 p. DOI: 10.1186/1471-2164-10-107. Devine G.J., Barber M., Denholm I. 2001. Incidence and inheritance of resistance to METI

America. Proc Natl Acad Sci U S A., 2011;108(10):4248-4251. 25. Fu R.L., Liu Z.G., Xing M., Li L., Zou Z.H. - Antigenic localization of specific allergen in the body of Dermatophagoides pteronyssinus by immunohistochemistry. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi., 2004;22(4):243-244. 26. Popescu F.D., Stanescu A.B., Secureanu F.A. - Alergia la Blattella germanica. Journal of the Romanian Society of Allergy and Clinical Immunology., 2009;6(1):3-6. 27. Dutau G., Rancé F. - “NPAs”: a new allergic risk? Arch Pediatr., 2009;16(4):396-401. 28. Vieru M

, E. J., Kim, J, R., Choi, D. R., Ahn, Y. J. 2008. Toxicity of cassia and cinnamon oil compounds and cinnamaldehyde-related compounds to Sitophilus oryzae (Coleoptera: Curculionidae). Journal of Economic Entomology , 101 (6), 1960–1966. Lee, H. S. 2004. P-Anisaldegydae: Acaricidal component of Pimpinella anisum seed oil against the house dust mites Dermatophagoides farina and Dermatophagoides pteronyssinus . Planta Medica , 70 (3), 279-281. Lu, C. D., Gangyi, X., Kawas