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Low CD4 count plus coma predicts cryptococcal meningitis in Tanzania

Peter R Kisenge1, Alexander T Hawkins, Venance P Maro

  • 1Department of Medicine, Kilimanjaro Christian Medical Centre, Moshi, Tanzania. pkisenge@yahoo.com <pkisenge@yahoo.com>

BMC Infectious Diseases
|May 12, 2007
PubMed
Abstract

Insights

Cryptococcal meningitis is common in Tanzanian HIV patients. Early diagnosis requires laboratory testing, as clinical signs alone are insufficient for accurate prognosis or diagnosis.

Area of Science:

  • Infectious Diseases
  • Neurology
  • Public Health

Background:

  • Cryptococcal meningitis prevalence and presentation in Tanzania are poorly understood due to limited diagnostic tools.
  • This lack of understanding hinders the effectiveness of fluconazole, an available treatment.

Purpose of the Study:

  • To evaluate the clinical features, diagnostic markers, and outcomes of cryptococcal meningitis in HIV-infected adults in Tanzania.
  • To assess the diagnostic utility of clinical signs and CD4 count for cryptococcal meningitis.

Main Methods:

  • A cohort of 149 HIV-infected adult inpatients with headache or altered mental status was studied.
  • Cerebrospinal fluid (CSF) was analyzed using India ink and latex agglutination assays.
  • Statistical methods were used to evaluate associations between clinical features and cryptococcal meningitis, determining sensitivity, specificity, and likelihood ratios.

Main Results:

  • Cryptococcal meningitis was linked to confusion, seizures, fever, tachycardia, meningismus, oral candidiasis, low Glasgow Coma Scale, and low CD4 counts.
  • CD4 count < 100/µL showed 93% sensitivity; coma (GCS ≤ 8) had 84% specificity.
  • While 50% of patients receiving high-dose fluconazole survived, no clinical or laboratory factors predicted prognosis.

Conclusions:

  • Cryptococcal meningitis is a significant issue among HIV-infected inpatients in Tanzania presenting with neurological symptoms.
  • Clinical features alone are unreliable for diagnosing or predicting prognosis.
  • Enhanced laboratory capacity for cryptococcal antigen testing is crucial to improve patient survival.

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