Molecular Surveillance and New Diagnostic Tests for Leishmaniasis

A special issue of Tropical Medicine and Infectious Disease (ISSN 2414-6366). This special issue belongs to the section "Vector-Borne Diseases".

Deadline for manuscript submissions: 15 February 2025 | Viewed by 1317

Special Issue Editors


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Guest Editor
Instituto René Rachou, Fundação Oswaldo Cruz, Minas Gerais 35402-163, Brazil
Interests: molecular diagnosis; leishmaniasis; isothermal DNA amplification; molecular surveillance

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Guest Editor
Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil
Interests: molecular diagnosis; leishmaniasis; isothermal DNA amplification; molecular surveillance

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Guest Editor
Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil
Interests: molecular diagnosis; validation diagnostic; leishmaniasis; clinical epidemiology; molecular surveillance

Special Issue Information

Dear Colleagues,

Leishmaniasis is an important disease complex caused by protozoan parasites of the genus Leishmania, considered a neglected tropical disease (NTD). It is usually classified according to clinical presentation as tegumentary (TL) or visceral (VL) leishmaniasis. Significant efforts have been made in the past few decades to control and/or eliminate NTDs, leishmaniasis included. The World Health Organization’s (WHO) defined road map (2021–2030) for control and/or elimination of NTDs and specific goals for leishmaniasis recognizes that diagnostics plays a central role in the achievement of such goals.

The laboratory tests currently available for the diagnosis of TL and VL do not provide sufficient accuracy to be considered the gold standard. Among diagnostic tests, PCR  techniques have been applied for leishmaniasis diagnosis with remarkable accuracy. However, generally, molecular tools require advanced laboratory facilities, making them difficult to implement in remote areas from high leishmaniasis-burden countries. The development or improvement of molecular tests is essential not only for the diagnosis of leishmaniasis but also for the implementation of molecular surveillance. There are still few initiatives for molecular surveillance of leishmaniasis. The implementation of molecular surveillance will allow monitoring the evolution of epidemics in time and space, characterizing new transmission cycles, and detecting new Leishmania variants related to new clinical features that are fundamental to the control of leishmaniasis.

This Special Issue aims to publish original articles, reviews and mini-reviews, case reports, and short communications that are related to the development or improvement of molecular tests for the diagnosis of human and animal leishmaniasis and molecular surveillance of leishmaniasis. 

Dr. Daniel Moreira De Avelar
Dr. Andreza Pain Marcelino
Dr. Liliane De Fátima Antonio
Guest Editors

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Keywords

  • molecular diagnosis
  • visceral leishmaniasis
  • tegumentary leishmaniasis
  • genomic surveillance
  • human leishmaniasis
  • animal leishmaniasis

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Published Papers (1 paper)

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Research

12 pages, 650 KiB  
Article
Standardization and Evaluation of the LAMP Technique for the Diagnosis of Canine Visceral Leishmaniasis in Conjunctival Swab Samples Using DNA Extracted by a Silica Column and Boiling
by Isabela C. S. Santos, Daniel M. Avelar, Luciana F. C. Miranda, Cintia X. de Mello, Lucas Keidel, Maria Inês F. Pimentel, Luanna S. Ventura, Aline Fagundes, Fernanda N. Santos, Liliane F. A. Oliveira, Shanna A. Santos, Sandro Antonio Pereira, Rodrigo C. Menezes and Andreza P. Marcelino
Trop. Med. Infect. Dis. 2024, 9(11), 277; https://doi.org/10.3390/tropicalmed9110277 - 14 Nov 2024
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Abstract
The diagnosis of canine visceral leishmaniasis (CVL) presents a challenge due to a variety of non-specific clinical signs. The available tests have low sensitivity. This study aimed to standardize and evaluate the loop-mediated isothermal amplification technique with K26 target (K26-LAMP) for diagnosis of [...] Read more.
The diagnosis of canine visceral leishmaniasis (CVL) presents a challenge due to a variety of non-specific clinical signs. The available tests have low sensitivity. This study aimed to standardize and evaluate the loop-mediated isothermal amplification technique with K26 target (K26-LAMP) for diagnosis of CVL in conjunctival swab (CS) DNA samples extracted through a silica column commercial kit (SW-kit) and boiling (SW-DB) and to compare sensitivity with conventional PCR (kDNA-cPCR) and quantitative real-time PCR (18S-qPCR). Clinical samples of CSs were collected from 54 dogs after reactive serology tests. Positive parasitological and/or histological tests were used as inclusion criteria for a sensitivity analysis. A total of 79.2% (43/54) of dogs without clinical signs or with mild, moderate, or severe clinical signs were included in the study. The sensitivity results of K26-LAMP, kDNA-cPCR, and 18S-qPCR were 72.1%, 81.4%, and 80.5% with the SW-kit and 97.2%, 95.2%, and 57.1% with SW-DB, respectively. In all techniques, the proportion of positives was higher in the group with severe clinical disease, with statistically significant differences in the K26-LAMP and 18S-qPCR techniques being seen with the SW-kit. The results obtained with LAMP for CS samples are promising and its performance is similar to other techniques. Full article
(This article belongs to the Special Issue Molecular Surveillance and New Diagnostic Tests for Leishmaniasis)
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