ArticleThe Brazilian journal of infectious diseases : an official publication of the Brazilian Society of Infectious Diseases
Field validation of a Leishmania (Leishmania) mexicana exo-antigens ELISA for diagnosing tegumentary leishmaniasis in regions of Leishmania (Viannia) predominance.
Article in The Brazilian journal of infectious diseases : an official publication of the Brazilian Society of Infectious Diseases. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers, 2 of them syntheses that pooled it.
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Who cites it
5 citing papers in PubMed, 2 syntheses or guidelines pooled it, 12 citations in OpenAlex.
- Global Landscape of Molecular and Immunological Diagnostic Tests for Human Leishmaniasis: A Systematic Review and Meta-Analysis.Pathogens (Basel, Switzerland) · 2025Pooled it
- Diagnostic accuracy of Enzyme-Linked Immunosorbent Assays to detect anti-Leishmania antibodies in patients with American Tegumentary Leishmaniasis: a systematic review.Revista do Instituto de Medicina Tropical de Sao Paulo · 2019Pooled it
- Analysis of the Antigenic and Prophylactic Properties of theFrontiers in cellular and infection microbiology · 2018Article
- Leptomonas seymouri and Crithidia fasciculata exoantigens can discriminate human cases of visceral leishmaniasis from American tegumentary leishmaniasis ones.Revista do Instituto de Medicina Tropical de Sao Paulo · 2017Article
- Field Validation of SYBR Green- and TaqMan-Based Real-Time PCR Using Biopsy and Swab Samples To Diagnose American Tegumentary Leishmaniasis in an Area Where Leishmania (Viannia) braziliensis Is Endemic.Journal of clinical microbiology · 2017Article
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7 authors at 3 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
backgroundSeveral tests are performed to obtain better accuracy when diagnosing American tegumentary leishmaniasis (ATL). It is believed that antigens released via secretion, excretion and metabolism are more specific than are antigens released by the lysis of Leishmania parasites. Such antigens are known as exo-antigens (exo-Ag) and are formed from products released by cultured parasites in a way that is similar to that in which they cause infections in hosts.
objectiveWe attempted to validate a Leishmania mexicana ELISA exo-Ag for ATL diagnosis in Midwestern Brazil.
methodsA total of 281 patients were included in the study. We analysed pre-treatment blood from 98 ATL patients; out of those, 85.7% and 14.3% had cutaneous and mucosal forms, respectively.
resultsThe exo-Ag accuracy was 83.99% (95% CI=79.24-87.81) with a sensitivity value of 90.82% (95% CI=83.46-95.09) and an overall specificity value of 80.33% (95% CI=73.97-85.44). The positive predictive value and negative predictive value were 71.20% (95% CI=62.72-78.41) and 94.23% (95% CI=89.40-96.94), respectively. Among healthy controls, exo-Ag had a specificity of 91.25% (95% CI=83.02-95.70); additionally, the test had specificity rates of 66.67% (95% CI=46.71-82.03) in Chagas disease patients, 60.61% (95% CI=43.68-75.32) in patients with rheumatic diseases, 76.92% (95% CI=49.74-91.82) in pemphigus foliaceus patients, 87.50% (95% CI=52.91-97.76) in leprosy patients, 87.50% (95% CI=63.98-96.50) in VRDL-positive patients, and 77.78 (95% CI=45.26-93.68) in deep mycosis patients.
conclusionBased on the indicators of validity, we conclude that the results obtained in this study enable the recommendation of the exo-Ag ELISA for ATL diagnosis once it presented a reasonable accuracy compared to classical methods. Cost evaluations are necessary to completely define the role of this technique in large scale.
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