Preemptive Therapy for Cryptococcal Meningitis: A Valid Strategy for Latin America?

Area of Science:

• Infectious Diseases
• Public Health
• Medical Diagnostics

Background:

• AIDS-related cryptococcal meningitis is a major cause of death in low- and middle-income countries.
• Early detection of cryptococcosis through advanced diagnostics can identify asymptomatic cases and reduce mortality.
• The World Health Organization recommends cryptococcal antigen (CRAG) screening for HIV populations with a CRAG prevalence exceeding 3%.

Purpose of the Study:

• To assess the current data on asymptomatic CRAG prevalence in Latin America.
• To evaluate the feasibility of implementing CRAG screening programs in the region.
• To highlight the utility of the CRAG lateral flow assay (LFA) for screening.

Main Methods:

• Review of existing studies on asymptomatic CRAG prevalence in HIV-infected patients in Latin America.
• Analysis of data from four identified studies, including one full-text publication.
• Consideration of the advantages of the CRAG lateral flow assay (LFA) for implementation.

Main Results:

• Limited data exists on CRAG prevalence in Latin America.
• Four studies indicated asymptomatic CRAG prevalence ranging from 2.7% to 6.2% in specific HIV-positive patient groups.
• The CRAG LFA presents practical advantages for screening program implementation.

Conclusions:

• While more data is needed, the prevalence of asymptomatic cryptococcal antigenaemia in Latin America appears to warrant screening.
• Implementing a CRAG screening strategy in Latin America seems opportune.
• The CRAG LFA is a suitable tool for potential screening programs in the region.