Resumen

HAUMBA, Samson M. et al. Prevalence of cryptococcal antigen (CrAg) among HIV-positive patients in Eswatini, 2014-2015. Afr. J. Lab. Med. [online]. 2020, vol.9, n.1, pp.1-7. ISSN 2225-2010.  http://dx.doi.org/10.4102/ajlm.v9i1.933.

BACKGROUND: Cryptococcal meningitis is a leading cause of death amongst people living with HIV. However, routine cryptococcal antigen (CrAg) screening was not in the national guidelines in Eswatini. OBJECTIVES: A cross-sectional study was conducted between August 2014 and March 2015 to examine CrAg prevalence at Mbabane Government Hospital in Eswatini. METHODS: We collected urine and whole blood from antiretroviral-therapy-naïve patients with HIV and a cluster of differentiation 4 (CD4) counts < 200 cells/mm³ for plasma and urine CrAg lateral flow assay (LFA) screening at the national HIV reference laboratory. Two CD4 cut-off points were used to estimate CrAg prevalence: CD4 < 100 and < 200 cells/mm³. Sensitivity and specificity of urine CrAg LFA was compared to plasma CrAg LFA. RESULTS: Plasma CrAg prevalence was 4% (8/182, 95% confidence interval [CI]: 2-8) amongst patients with CD4 counts of < 200 cells/mm³, and 8% (8/102, 95% CI: 3-15) amongst patients with CD4 counts of < 100 cells/mm³. Urine CrAg LFA had a sensitivity of 100% (95% CI: 59-100) and a specificity of 80% (95% CI: 72-86) compared with plasma CrAg LFA tests for patients with CD4 < 200 cells/mm³. Forty-three per cent of 99 patients with CD4 < 100 were at World Health Organization clinical stages I or II. CONCLUSION: The prevalence of CrAg in Eswatini was higher than the current global estimate of 6% amongst HIV-positive people with CD4 < 100 cell/mm³, indicating the importance of initiating a national screening programme. Mechanisms for CrAg testing, training, reporting, and drug and commodity supply issues are important considerations before national implementation.

Palabras clave : cryptococcal antigenaemia screening; prevalence; people living with HIV; cryptococcal meningitis; advanced HIV disease package; Eswatini.

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