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Specific IgE responses in human strongyloidiasis.

J McRury, I T De Messias, P D Walzer

Clinical and Experimental Immunology

|September 1, 1986

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A new radioallergosorbent test (RAST) detected parasite-specific IgE antibodies in 89.5% of patients with Strongyloides stercoralis infection. This test may aid in diagnosing strongyloidiasis, a parasitic disease.

Area of Science:

Immunology
Parasitology
Medical Diagnostics

Background:

Strongyloides stercoralis is a parasitic nematode causing strongyloidiasis.
Accurate diagnosis of strongyloidiasis can be challenging.
Immunological responses, including IgE antibodies, are involved in parasitic infections.

Purpose of the Study:

To develop and evaluate a new radioallergosorbent test (RAST) for detecting IgE antibodies against Strongyloides stercoralis.
To assess the diagnostic utility of the RAST in patients with confirmed strongyloidiasis.

Main Methods:

A newly developed radioallergosorbent test (RAST) was used to measure IgE antibodies against Strongyloides stercoralis larval antigens.
Sera from 152 patients with confirmed S. stercoralis infection were tested.

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Control groups included non-infected individuals, patients with other parasitic infections, and allergic patients.

Main Results:

The RAST detected parasite-specific IgE in 89.5% of patients with S. stercoralis infection.
98% of non-infected controls were negative, indicating high specificity.
Low positivity was observed in two patients with Ascaris lumbricoides and one allergic patient.

Conclusions:

The majority of patients with strongyloidiasis develop IgE antibodies against S. stercoralis filariform larvae.
The RAST for IgE is a potentially useful tool for the immunological evaluation and diagnosis of strongyloidiasis.
Further research is needed to define the functional significance of this IgE response.