Phadia D2 and D1 tests are used to detect blood levels of the IgE (antibodies) responsible for allergic reactions (rhinitis, asthma, eczema) to mites (household). The IgE detected in the test is specific to Dermatophagoides farinae (D2 test) or Dermatophagoides pteronyssinus (D1 test), the main allergens in household dust. The interpretation chart accompanying the results expresses the probability of an allergic reaction to mites, but not necessarily the severity of the reaction. Case history (symptoms, connection with the dwelling type and housekeeping habits, etc.) and clinical examination by the physician are essential for a reliable interpretation of the results.
An anti-Dermatophagoides farinae or anti-D. pteronyssinus IgE result below 0.35 kilounits per litre (< 0.35 kU/L) indicates that mites are probably be responsible for the symptoms reported by the person, but it DOES NOT COMPLETELY RULE OUT THIS POSSIBILITY. All negative and positive results must be interpreted in light of the case history.