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Anaphylactic shock to Argas reflexus bite.

O Quercia1, F Emiliani, F G Foschi

  • 1Allergy Unit, Internal Medicine Department, Ospedale per gli Infermi Faenza (Ra), Italy.

European Annals of Allergy and Clinical Immunology
|April 30, 2005
PubMed
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Anaphylaxis, a severe allergic reaction, can be triggered by pigeon tick bites. This case highlights a patient experiencing recurrent anaphylaxis linked to Argas reflexus exposure in their home.

Area of Science:

  • Allergy and Immunology
  • Parasitology
  • Emergency Medicine

Background:

  • Anaphylaxis is a severe, life-threatening allergic reaction affecting all age groups.
  • Its occurrence is more common than often perceived, impacting a significant portion of the population.
  • Identifying the specific triggers for anaphylaxis can be challenging, leading to unknown causes in many cases.

Observation:

  • A patient presented with recurrent episodes of severe allergic reactions, including rash, swelling, hypotension, and tachycardia.
  • Symptoms consistently appeared at night, particularly during winter months.
  • Investigation of the patient's home environment revealed the presence of Argas reflexus, commonly known as pigeon ticks.

Findings:

  • Morphological examination confirmed the parasites as Argas reflexus.

Related Experiment Videos

  • Specific IgE antibodies to a protein in Argas reflexus salivary glands were detected.
  • This confirmed an immediate-type hypersensitivity reaction to the pigeon tick.

    • Implications:

    • Pigeon ticks (Argas reflexus) can be an unrecognized cause of severe anaphylaxis in humans.
    • Environmental investigation and parasite identification are crucial for diagnosing obscure anaphylaxis triggers.
    • This case underscores the importance of considering arthropod-borne allergens in allergic reactions.