How effective are rapid diagnostic tests for Chagas disease?

Area of Science:

• Infectious Diseases
• Parasitology
• Tropical Medicine

Background:

• Conventional diagnosis of chronic Chagas disease requires two serological tests with distinct antigens.
• Current diagnostic methods necessitate cold storage for reagents and samples, specialized equipment, and trained personnel.
• Delayed results from conventional tests can lead to patient loss to follow-up, particularly in endemic areas.

Purpose of the Study:

• To evaluate the performance and advantages of rapid diagnostic tests (RDTs) for detecting chronic *Trypanosoma cruzi* infections.
• To highlight the potential of RDTs in overcoming limitations of conventional Chagas disease diagnosis.

Main Methods:

• Review of recent studies on the versatility and performance of RDTs for *Trypanosoma cruzi* detection.
• Comparison of RDTs with conventional serological tests in referral centers and field settings.

Main Results:

• RDTs demonstrate performance equivalent to conventional diagnostic tools for chronic Chagas disease.
• RDTs do not require cold storage and yield results within an hour.
• RDTs are user-friendly, require minimal sample volume (finger-pricked whole blood), and are suitable for field use.

Conclusions:

• RDTs present significant advantages for generalizing Chagas disease diagnosis, especially in resource-limited endemic areas.
• Despite their promise, geographical validation of RDTs is recommended before widespread implementation to address the diagnostic gap.