Dermatophagoides farinae belongs to the Pyroglyphidae family. Dermatophagoides farinae is the second most important house dust mite (HDM) next to D. pteronyssinus. ≥80% of the house dust mites (HDM) allergy patients is allergic to both allergen species. It has been shown that approximately 80-90% of tested sera from mite-sensitive patients have an IgE response to Der p 1 and Der p 2. Due to the fact that Group 1 and 2 allergens are highly homologous between D. farinae and D. pteronyssinus the IgE reactivity is very likely similar for Der f 1 and Der f 2.
- Whole culture (vial of 1gr) A whole culture consist of all the material of the house dust mite cultivation. This means: mite bodies, eggs, larves, cultivation medium and the feaces. Whole culture contains all components which are also present within households. In real life, atopic patients respond to the whole culture of house dust mites. Citeq produces a controlled cultivation of house dust mites. Whole Cultures of Dermatophagoides farinae are mostly used as raw materials in the pharmaceutical production of vaccines and in vivo diagnostics
- Der f 1 purified (≥ 95%) Approx. 900-1100 µg BCA per vial. Group 1 (Der f 1) allergens have a molecular weight of 25 kDa, as monomer, neutral slightly acidic, and polymorph proteins. Citeq can extract the Group 1 allergens with a purity of ≥ 98%. At least 70% of allergic individuals recognize group 1 allergens. These allergens are identified in a lot of house dust mites (HDM). The allergens can be conceded through the whole body, but are mostly present in the feacel pellets of the HDM. The major allergen Der f 1 is mostly used in in-vitro diagnostic tests and in allergy and asthma research.
- Der f 2 purified (≥ 95%) Approx. 100-300 µg BCA per vial. Group 2 (Der f 2) allergens are neutral to slightly basic and polymorph. Citeq can extract the Group 2 allergens with a purity of ≥ 98%. The majority of allergic individuals recognize the 14kDa non-glycosylated allergens. Group 2 allergens are identified in a large number of HDM’s compared to other allergens. Group 2 allergens are abundantly present within the mite body. The major allergen Der f 2 is mostly used in in-vitro diagnostic tests and in allergy and asthma research.
- Extract of whole culture (vials of 10mg, 100mg or 1gr) Whole culture which is extracted. Extracts are applied in in-vitro diagnostics tests and as standards or active substance in the research of asthma and allergy.
Our main focus is the production of house dust mites (HDMs) and their allergens. Citeq was born based on a passion for mites and the research for how mites influence our daily lives. Our specialty starts with our cultivation medium which has an absolute low in foreign protein. Our cultivation technique leads to high concentrations of the major allergens, resulting in strong raw materials, extracts in several grades of purity, and very pure major allergens. All our house dust mite products contain the native proteins, with no denaturing treatments during production and purification.
Prices and ordering
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Certificate of analysis
Each product will be delivered with a certificate of analysis. The certificate of analysis provides information, e.g. allergenic pattern, protein content (BCA and Bradford method), endotoxin level, protein pattern and protease activity. On this page you can find an an example of this certificate. If you want to receive a certificate of analysis before ordering please let us know. We shall send you the certificates of multiple batches so you can compare the batches and choose the batch that meets your requirements.
We understand that if you are using source material which is fulfilling your wishes you would like to receive the same material again for future projects. To provide material from the same batch over a longer period of time we produce large batches. This way we have we a lot of material available from a specific batch. You can even place a reservation for future orders.
HDM induced asthma models
Often we receive questions about house dust mite (HDM) induced asthma models. Which models are researchers using, which model do we recommend, what are the differences? To answer these questions we have contacted multiple research institutes all over the world and collected their models and background information. Click on this link for an overview of the available animal models.
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