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Updated: May 29, 2026
Capsular Serotyping of Streptococcus pneumoniae by Latex Agglutination
Published on: September 25, 2014
Diagnostic value of latex agglutination in cryptococcal meningitis
Rm Saldanha Dominic1, Hv Prashanth, Shalini Shenoy
1Department of Microbiology, Kasturba Medical College, Mangalore, Karnataka, India.
Background:
Cryptococcus neoformans is the most common fungal pathogen to infect the central nervous system, and an effective diagnostic method is therefore necessary for the early diagnosis of cryptococcal meningitis.
Aim:
The efficacy of India ink preparation, cerebrospinal fluid (CSF) culture and CSF cryptococcal antigen detection by the latex agglutination test for diagnosis of cryptococcal meningitis are compared to determine the most efficient test.
Materials And Methods:
Two hundred CSF samples from human immunodeficiency virus - positive patients suspected to be suffering from meningitis were screened for Cryptococcus neoformans.
Results:
Latex agglutination for cryptococcal antigen detection was found to be more sensitive compared to India ink staining and CSF culture.
Conclusions:
Antigen detection by latex agglutination proved to be both sensitive and specific method for the diagnosis of cryptococcal meningitis. Rapid, early diagnosis of infection by detection of cryptococcal antigen by latex agglutination may alter the prognosis for these patients.
Insights
Early diagnosis of cryptococcal meningitis is crucial. Latex agglutination for cryptococcal antigen detection is a sensitive and specific method, outperforming India ink and CSF culture in HIV-positive patients.
Area of Science:
- Infectious Diseases
- Mycology
- Clinical Microbiology
Background:
- Cryptococcus neoformans is a leading cause of fungal meningitis, particularly in immunocompromised individuals.
- Early and accurate diagnosis of cryptococcal meningitis is critical for patient outcomes.
Purpose of the Study:
- To compare the diagnostic efficacy of India ink preparation, cerebrospinal fluid (CSF) culture, and CSF cryptococcal antigen detection via latex agglutination.
- To identify the most efficient diagnostic test for cryptococcal meningitis.
Main Methods:
- Screening of 200 CSF samples from HIV-positive patients with suspected meningitis.
- Evaluation of India ink staining, CSF culture, and latex agglutination for cryptococcal antigen detection.
Main Results:
- Latex agglutination demonstrated higher sensitivity for cryptococcal antigen detection compared to India ink staining.
- Latex agglutination was more sensitive than CSF culture in diagnosing cryptococcal meningitis.
Conclusions:
- Latex agglutination is a sensitive and specific method for diagnosing cryptococcal meningitis.
- Rapid diagnosis using latex agglutination for cryptococcal antigen can potentially improve patient prognosis.
