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Tropical pulmonary eosinophilia

R K Ong1, R L Doyle

  • 1Department of Respiratory and Critical Care Medicine, Singapore General Hospital.

Chest
|June 19, 1998
PubMed
Summary

Tropical pulmonary eosinophilia (TPE) is a hypersensitivity reaction to filarial parasites, often missed in non-endemic areas. Early diagnosis and diethylcarbamazine treatment are crucial to prevent severe lung damage.

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Area of Science:

  • Tropical Medicine
  • Pulmonology
  • Infectious Diseases

Background:

  • Tropical pulmonary eosinophilia (TPE) is a parasitic lung disease prevalent in tropical regions, increasingly diagnosed in Western countries due to global travel.
  • TPE often presents with symptoms mimicking asthma, leading to diagnostic delays and potential complications.
  • The condition arises from a hypersensitivity response to lymphatic filarial parasites, particularly affecting non-immune individuals visiting endemic areas.

Purpose of the Study:

  • To highlight the diagnostic challenges and clinical features of Tropical Pulmonary Eosinophilia.
  • To emphasize the importance of early recognition and treatment of TPE to prevent long-term pulmonary sequelae.
  • To provide diagnostic criteria and recommended treatment for TPE.

Main Methods:

  • Review of clinical manifestations, diagnostic criteria, and treatment outcomes for TPE.
  • Analysis of patient history, peripheral eosinophilia, antibody titers, and IgE levels.
  • Assessment of response to diethylcarbamazine treatment.

Main Results:

  • Key clinical features include cough, wheezing, dyspnea, fever, and weight loss.
  • Diagnostic indicators include peripheral eosinophilia (>3,000/mm3), absence of microfilariae, high antifilarial antibodies, elevated total IgE (>1,000 U/mL), and response to diethylcarbamazine.
  • Untreated TPE can lead to pulmonary fibrosis, chronic bronchitis, and respiratory failure.

Conclusions:

  • Early diagnosis of TPE is essential, especially in travelers returning from endemic regions.
  • Diethylcarbamazine is the recommended treatment, leading to favorable outcomes.
  • Prompt management prevents irreversible pulmonary damage and improves patient prognosis.

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