Your Phadiatop Result: Is 0.35 Positive or Negative?

A Phadiatop value of 0.35 (0) indicates a negative result for specific IgE antibodies related to common inhalant allergens. This suggests that there is no significant sensitization to the allergens tested in the Phadiatop panel?

Hello doctor, in my blood test results, there is an item called Phadiatop, and the value reported is "0.35(0)", without indicating negative or positive.
Could you please tell me if my Phadiatop value is negative or positive? Thank you, doctor.

Ting, 20~29 year old female. Ask Date: 2022/05/30

Dr. Gao Jiankai reply Internal Medicine

Hello, thank you for your inquiry.
Phadiatop is a "qualitative" test for allergic reactions.
Unlike "quantitative" tests, which measure the levels of IgE and specific allergens to calculate the intensity of the allergy, qualitative tests only detect the presence of allergy-related IgE.
Generally, a Phadiatop result is considered normal if it is <0.35.
Therefore, your result may fall into a gray area, but due to the low index, I usually interpret it as normal.
The Allergy, Immunology, and Rheumatology Department of Changhua Hospital, Ministry of Health and Welfare, is concerned about your well-being.

Reply Date: 2022/05/30

More Info

The Phadiatop test is a specific blood test used to detect the presence of IgE antibodies that are associated with allergic reactions. The result you received, "0.35(0)," indicates a value of 0.35, which is a crucial detail in interpreting your result. Generally, Phadiatop results are categorized based on specific cutoff values.
In most laboratories, a Phadiatop value of less than 0.35 is considered negative, indicating that there is no significant allergic response detected. A value of 0.35 is often seen as a borderline result, which can sometimes lead to confusion. In your case, since your result is exactly at the threshold of 0.35, it is typically interpreted as being within the normal range, suggesting that there is no significant allergic sensitization present.

It is important to note that the interpretation of these results can vary slightly depending on the laboratory and the specific guidelines they follow. However, in clinical practice, a result of 0.35 is usually not considered positive for an allergic reaction. Instead, it may indicate that your immune system has not produced a significant amount of IgE antibodies in response to common allergens tested by the Phadiatop panel.

If you have concerns about allergies or if you are experiencing symptoms such as sneezing, itching, or respiratory issues, it is advisable to discuss these with your healthcare provider. They may recommend further testing or a referral to an allergist for a more comprehensive evaluation.
In summary, your Phadiatop result of 0.35 is generally interpreted as negative or within the normal range, indicating no significant allergic response. However, always consult with your healthcare provider for personalized advice and further clarification based on your specific health situation.

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