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Survival following screening and preemptive antifungal therapy for subclinical cryptococcal disease in advanced HIV infection.


ABSTRACT:

Objectives

Our study's primary objective was to compare 1-year survival rates between serum cryptococcal antigen (sCrAg)-positive and sCrAg-negative HIV-positive individuals with CD4+ cell counts less than 100 cells/μl without symptoms of meningitis in Zimbabwe.

Design

This was a prospective cohort study.

Methods

Participants were enrolled as either sCrAg-positive or sCrAg-negative and followed up for 52 weeks or less, with death as the outcome. Lumbar punctures were recommended to all sCrAg-positives and inpatient management with intravenous amphotericin B and high-dose fluconazole was recommended to those with disseminated Cryptococcus. Antiretroviral therapy was initiated immediately in sCrAg-negatives and after at least 4 weeks following initiation of antifungals in sCrAg-positives. Multivariable logistic regression models were used to determine risk factors for mortality.

Results

We enrolled 1320 participants and 130 (9.8%) were sCrAg positive, with a median sCrAg titre of 1 : 20. Sixty-six (50.8%) sCrAg-positives had lumbar punctures and 16.7% (11/66) had central nervous system (CNS) dissemination. Cryptococcal blood cultures were performed in 129 sCrAg-positives, with 10 (7.8%) being positive. One-year (48-52 weeks) survival rates were 83.9 and 76.1% in sCrAg-negatives and sCrAg-positives, respectively, P = 0.011. Factors associated with increased mortality were a positive sCrAg, CD4+ cell count less than 50 cells/μl and having presumptive tuberculosis (TB) symptoms.

Conclusion

Our study reports a high prevalence of subclinical cryptococcal antigenemia and reiterates the importance of TB and a positive sCrAg as risk factors for mortality in advanced HIV disease (AHD). Therefore, TB and sCrAg screening remains a crucial component of AHD package, hence it should always be part of the comprehensive clinical evaluation in AHD patients.

SUBMITTER: Makadzange TA 

PROVIDER: S-EPMC8416705 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature

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Publications

Survival following screening and preemptive antifungal therapy for subclinical cryptococcal disease in advanced HIV infection.

Makadzange Tariro Azure TA   Hlupeni Admire A   Machekano Rhoderick R   Boyd Kathryn K   Mtisi Takudzwa T   Nyamayaro Primrose P   Ross Christine C   Vallabhaneni Snighdha S   Balachandra Shirish S   Chonzi Prosper P   Ndhlovu Chiratidzo Ellen CE  

AIDS (London, England) 20211001 12


<h4>Objectives</h4>Our study's primary objective was to compare 1-year survival rates between serum cryptococcal antigen (sCrAg)-positive and sCrAg-negative HIV-positive individuals with CD4+ cell counts less than 100 cells/μl without symptoms of meningitis in Zimbabwe.<h4>Design</h4>This was a prospective cohort study.<h4>Methods</h4>Participants were enrolled as either sCrAg-positive or sCrAg-negative and followed up for 52 weeks or less, with death as the outcome. Lumbar punctures were recomm  ...[more]

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