Leishmaniasis epidemiology: all down to the DNA

Area of Science:

• Molecular Epidemiology
• Parasitology
• Genetics

Background:

• Quantitative methods in leishmaniasis epidemiology highlight the need for accurate field measurements of biological parameters to understand disease spread and control.
• Key research areas identified include diagnostic tools, understanding parasite virulence genetics, and measuring host resistance genetics.

Purpose of the Study:

• To describe progress in developing molecular tools for leishmaniasis epidemiology.
• To highlight advancements in species-specific diagnosis, virulence factor analysis, and host resistance gene identification.

Main Methods:

• Isolation and field application of genomic and kDNA probes for species-specific diagnosis.
• Development of field-deployable PCR-based diagnostic assays.
• Measurement of genetic variability in parasite virulence factors (lipophosphoglycan, GP63, HSP70) in field isolates.
• Identification and cloning of host resistance genes and linkage analysis in human multicase families.

Main Results:

• Progress in developing and applying molecular probes and PCR assays for leishmaniasis diagnosis in the field.
• Initial studies measuring variability in key parasite virulence factors in *Leishmania peruviana* field isolates.
• Advancement in identifying genes controlling host resistance and their potential role in human disease phenotypes.

Conclusions:

• DNA-based approaches are crucial for the future of leishmaniasis epidemiology.
• Molecular tools offer significant potential for improved diagnostics, understanding parasite evolution, and identifying genetic determinants of host resistance.