Article

Serum cyrptococcal antigen: diagnostic value in the diagnosis of AIDS-related cryptococcal meningitis.

Department of Medicine, Maharaj Nakhon Ratchasima Hospital, Nakhon Ratchasima, Thailand.
Journal of the Medical Association of Thailand = Chotmaihet thangphaet 02/1999; 82(1):65-71. DOI: 10.1016/S0895-4356(98)90051-8
Source: PubMed

ABSTRACT The incidences of HIV-AIDS patients with opportunistic infections of the central nervous system are increasing. Of these, cryptococcal meningitis is the most important and serious. A simple method for the diagnosis of cryptococcal meningitis is needed despite its variable clinical features and the lack of a capacity in most health facilities in Thailand to exclude it from other diseases especially mass lesions in the brain.
To identify the capability and cut off point of serum cryptococcal antigen for diagnosis and screening of cryptococcal meningitis in HIV-AIDS patients.
One hundred consecutive cases of HIV-AIDS patients suspected of having central nervous system infections were prospectively recruited for the study. The serum of all patients were examined for cryptococcal antigen by latex agglutination test, the Pastorex Cryptococcus manufactured by Sanofi Diagnostic Pasteur, France. If a test was positive, the serum dilution was carried out using 10-fold serial dilution. Every patient went through pre-defined standard investigations to derive at a definite diagnosis. The gold standard for diagnosis of cryptococcal meningitis was the presence of encapsulated yeast forms in the cerebrospinal fluid or a positive culture for cryptococcal neoformans from the cerebrospinal fluid.
Of 100 patients enrolled in this study, 58 patients had cryptococcal meningitis and serum cryptococcal antigen was detectable in 60 patients. If the cut-off point for a positive test was when the serum cryptococcal antigen titer was more than zero, then, the sensitivity of the test was 91.4 per cent, the specificity was 83.3 per cent, likelihood ratio if test positive (LR+) was 5.47, likelihood ratio if test negative (LR-) was 0.1, false positive was 16.7 per cent, false negative was 8.6 per cent.
We conclude that serum cryptococcal antigen is a simple and rapid screening method for diagnosis of cryptococcal meningitis.

5 Followers
 · 
250 Views
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Recent advances in the diagnosis and management of cryptococcal meningitis are promising and have been improving long-term survival. Point of care testing has made diagnosing cryptococcal meningitis rapid, practical, and affordable. Targeted screening and treatment programs for cryptococcal antigenemia are a cost-effective method for reducing early mortality on antiretroviral therapy (ART). Optimal initial management with amphotericin and flucytosine improves survival against alternative therapies, although amphotericin is difficult to administer and flucytosine is not available in middle- or low-income countries, where cryptococcal meningitis is most prevalent. Controlling increased intracranial pressure with serial therapeutic lumbar punctures has a proven survival benefit. Delaying ART initiation for 4 weeks after the diagnosis of cryptococcal meningitis is associated with improved survival. Fortunately, new approaches have been leading the way toward improving care for cryptococcal meningitis patients. New trials utilizing different combinations of antifungal therapy are reviewed, and we summarize the efficacy of different regimens.
    06/2015; 2(2). DOI:10.1007/s40475-015-0046-y
  • [Show abstract] [Hide abstract]
    ABSTRACT: Cryptococcal meningitis (CM), a fungal disease caused by Cryptococcus species, is one of the most common opportunistic infections among persons with HIV/AIDS. The highest burden of disease is in sub-Saharan Africa and Southeast Asia, where limited access to antiretroviral treatment and appropriate antifungal therapy contributes to high mortality rates. Increasing focus has been placed on earlier detection and prevention of disease. Primary prophylaxis and screening may provide a survival benefit and can be cost-effective in settings where CM prevalence is high. The development of a new point-of-care cryptococcal antigen assay has the potential to transform both disease prevention and diagnosis.
    Current Fungal Infection Reports 12/2011; 5(4). DOI:10.1007/s12281-011-0070-x
  • [Show abstract] [Hide abstract]
    ABSTRACT: Fever is one of the most common reasons for the emergency department presentation of immunocompromised patients. Their differential diagnosis can be broad and includes rare or unexpected pathogens. Certain infectious causes of fever portend true emergencies; if they are not managed appropriately, rapid progression and death may ensue. This article reviews the diagnosis and management of fevers in patients immunocompromised by human immunodeficiency virus/AIDS, solid-organ and hematopoietic transplants, chemotherapy-induced neutropenia, and tumor necrosis factor-α inhibitors. Prompt recognition of the type of immunosuppression and delineation of possible causes of fever are critical for management of these complex patients.
    Emergency medicine clinics of North America 11/2013; 31(4):1059-71. DOI:10.1016/j.emc.2013.07.002 · 0.85 Impact Factor