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Blomia Tropicalis

This article discusses a clinical trial investigating the use of Blomia tropicalis allergenic extract in skin prick tests for diagnosing mite allergies. The study aims to standardize the biological activity of various mite extracts, including Blomia tropicalis, to improve allergy diagnosis and treatment.

Table of Contents

What is Blomia Tropicalis?

Blomia tropicalis is a type of dust mite that is commonly found in tropical and subtropical regions. It’s known to cause allergic reactions in sensitive individuals, similar to other dust mite species.[1]

Blomia Tropicalis Allergenic Extract

The allergenic extract of Blomia tropicalis is a medical product used for diagnosing and potentially treating allergies caused by this specific dust mite. It’s officially called “Blomia tropicalis skin-prick test” and comes in the form of a solution.[1]

Medical Use and Purpose

The primary purpose of this allergenic extract is for diagnostic use. It’s used in a procedure called a skin prick test, which helps doctors determine if a patient is allergic to Blomia tropicalis. During this test, a small amount of the solution is placed on the skin, and then the skin is lightly pricked. If a person is allergic, a small, raised bump (called a wheal) will appear at the test site.[1]

How is it Administered?

The Blomia tropicalis allergenic extract is administered through a skin prick test. This is typically done on the forearm or back. The maximum concentration used is 10 mg/ml, and the test usually takes only a few minutes to perform.[1]

Who is Eligible for Treatment?

Based on the clinical trial information, individuals who might be eligible for this test include:

  • Adults aged 18-65 years
  • People with a medical history suggesting allergy
  • Individuals with demonstrated sensitivity to allergens, including Blomia tropicalis
  • Those who have not received immunotherapy for mite allergies in the past 5 years

It’s important to note that a doctor will determine if this test is appropriate for each individual patient.[1]

Who Should Not Use This Treatment?

Several factors may exclude someone from receiving this test. These include:

  • Pregnancy or breastfeeding
  • Recent use of antihistamines (within 7 days)
  • Certain skin conditions affecting the test area
  • Use of specific medications that might interfere with the test results
  • Certain immune system disorders
  • History of severe reactions to previous skin tests

Always inform your healthcare provider about your medical history and any medications you’re taking.[1]

Safety and Side Effects

While the skin prick test is generally considered safe, there is always a potential for adverse reactions. The clinical trial is designed to assess the safety and tolerability of the Blomia tropicalis extract. Possible side effects may include local skin reactions or, in rare cases, more severe allergic reactions. Medical professionals performing the test are prepared to handle any potential reactions.[1]

Ongoing Research

The Blomia tropicalis allergenic extract is currently part of a clinical trial. This research aims to standardize the biological activity of various mite allergens, including Blomia tropicalis. The goal is to determine the concentration of the extract that produces a skin reaction equivalent to a standard histamine solution. This standardization will help ensure consistent and reliable allergy testing across different patients and clinics.[1]

Aspect Details
Study Drug Blomia tropicalis allergenic extract
Administration Method Solution for skin prick test
Main Objective Standardize biological activity of mite extracts, including Blomia tropicalis
Primary Endpoint Wheal area (mm²) after skin prick test
Key Inclusion Criteria Age 18-65, history of allergy, sensitization to mite allergens
Key Exclusion Criteria Recent mite immunotherapy, severe diseases, pregnancy
Safety Assessment Monitoring of adverse reactions during the study

FAQ

  • What is the main purpose of the clinical trial using Blomia tropicalis extract? The main purpose is to evaluate the concentration of Blomia tropicalis allergenic extract that causes a skin reaction (wheal) equivalent in size to that produced by a standard histamine solution. This helps standardize the extract for more accurate allergy diagnosis.
  • Who can participate in this clinical trial? Participants must be between 18 and 65 years old, have a history of allergy, and show sensitization to at least one of the mite allergens being studied, including Blomia tropicalis. They must not have received mite immunotherapy in the past 5 years.
  • How is the Blomia tropicalis extract administered in the trial? The Blomia tropicalis extract is administered as a solution for skin prick test. This involves applying a small amount of the solution to the skin and then pricking the skin to allow the solution to enter and potentially cause a reaction.
  • What are the potential benefits of standardizing Blomia tropicalis extract? Standardizing the Blomia tropicalis extract helps ensure consistent and reproducible results in allergy testing. This can lead to more accurate diagnoses and better-tailored treatments for patients with mite allergies.
  • Are there any risks associated with participating in this trial? While the trial aims to evaluate the safety of the extracts, there may be risks such as allergic reactions during skin testing. Patients with a history of severe reactions to skin tests are excluded from the study to minimize risks.

Ongoing Clinical Trials on Blomia Tropicalis

  • Evaluation of Blomia tropicalis allergen extract using skin-prick test in patients with allergies

    Not yet recruiting

    2 1 1
    Investigated diseases:
    Investigated drugs:
    Spain

  • Study on Allergenic Extracts of Mites and Histamine Dihydrochloride for Allergy Patients

    Not recruiting

    2 1 1
    Investigated diseases:
    Investigated drugs:
    Spain

Glossary

  • Allergenic extract: A solution containing specific allergens (substances that can cause allergic reactions) used for diagnosing or treating allergies.
  • Blomia tropicalis: A species of house dust mite that is a common cause of allergies, especially in tropical and subtropical regions.
  • Skin prick test: A method used to diagnose allergies by applying a small amount of an allergen to the skin and then pricking the skin to see if a reaction occurs.
  • Wheal: A raised, itchy area of skin that appears during an allergic reaction or skin prick test.
  • Histamine dihydrochloride: A substance used as a reference in allergy testing to compare the strength of allergic reactions.
  • Biological standardisation: The process of ensuring that a biological product, such as an allergenic extract, has a consistent and measurable potency or strength.
  • HEP (Histamine Equivalent Prick): A unit used to measure the biological activity of an allergenic extract in relation to a standard histamine solution.
  • Sensitization: The process by which the immune system becomes reactive to a specific allergen, leading to allergic symptoms upon subsequent exposures.
  • Specific IgE: Antibodies produced by the immune system in response to a particular allergen, which can be measured in blood tests to diagnose allergies.

References

  1. http://clinicaltrials.eu/trial/study-on-allergenic-extracts-of-mites-and-histamine-dihydrochloride-for-allergy-patients/