Assessment of an Immuno-Diagnostic Method for Hookworm-Related Cutaneous Larva Migrans Using Crude Extracts of

Overview

Journal Trop Med Infect Dis

Specialty Infectious Diseases

Date 2023 Apr 27

PMID 37104335

Authors

Sitthithana Adam

Paron Dekumyoy

Duangporn Nacapunchai

Thawatchai Ketboonlue

Prakaykaew Charunwatthana

Jittima Dhitavat

Khuanchai Koompapong

Putza Chonsawat

Dorn Watthanakulpanich

Affiliations

Soon will be listed here.

Abstract

People can become infected with cutaneous larva migrans (CLM) through skin penetration by the infective zoonotic larvae of hookworms. Few studies have investigated CLM's immunodiagnosis, and the existing studies were limited to crude somatic or excretory/secretory antigens (Ags) from adult worms. Here, we aimed to develop an indirect enzyme-linked immunosorbent assay (ELISA) to differentiate and diagnose hwCLM by detecting immunoglobulin (Ig)E, IgG, and IgG subclasses 1-4 (IgG) against the somatic Ag of adult checkerboard titrations of adult worm extract. Pooled serum controls were immunocharacterized using an indirect ELISA. The IgG and IgE results were unsatisfactory; however, the use of total IgG achieved results comparable to those of immunoblotting. Thus, we continued to analyze the IgG-ELISA using serum samples from patients with hwCLM and heterologous infections as well as from healthy controls. The sensitivity and excellent specificity of the total IgG-ELISA were 93.75% and 98.37%, respectively, and its positive and negative predictive values were 75% and 99.67%, respectively. Antibodies from five cases of angiostrongyliasis, gnathostomiasis, and dirofilariasis cross-reacted with the somatic Ag of adult . . This new assay can adequately serodiagnose hwCLM when combined with clinical features and/or histological examination.

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