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Updated: Aug 9, 2026

Capsular Serotyping of Streptococcus pneumoniae by Latex Agglutination
Published on: September 25, 2014
[Use of the passive hemagglutination test for diagnosis of meningococcal infection]
Abstract:
A considerable percentage of patients with meningococcus infection displayed an increase in the actibody titres to meningococcus, group A, detectable in the passive hemagglutination test (PHAT). An increase in the antibody titre was mose frequent in the patients with clinical manifestations of meningococciemia and meningitis. The PHAT can be used as an auxiliary method of diagnosis permitting to establish the meningococcus etiology of the disease in a number of cases.
Insights
Increased antibody titers to meningococcus group A were detected in patients with meningococcal infections using the passive hemagglutination test (PHAT). This diagnostic method aids in identifying meningococcal disease, particularly meningococcemia and meningitis.
Area of Science:
- Immunology
- Infectious Diseases
- Microbiology
Context:
- Meningococcus infections pose significant public health challenges.
- Accurate and timely diagnosis is crucial for effective patient management.
- Serological markers can aid in identifying the causative agent of bacterial meningitis and sepsis.
Purpose:
- To evaluate the utility of the passive hemagglutination test (PHAT) for detecting antibodies against meningococcus group A.
- To determine the correlation between increased antibody titers and clinical manifestations of meningococcal disease.
Summary:
- A significant proportion of patients with meningococcus infection showed elevated antibody titers to meningococcus group A, as measured by PHAT.
- The increase in antibody titers was most commonly observed in patients presenting with meningococcemia and meningitis.
- These findings suggest PHAT is a valuable auxiliary diagnostic tool for confirming meningococcal etiology.
Impact:
- The study highlights the potential of PHAT as a supportive diagnostic method in clinical settings.
- Improved diagnostic capabilities can lead to earlier and more targeted treatment of meningococcal infections.
- This research contributes to understanding the host immune response to meningococcal pathogens.
Related Concept Videos
Bacterial Meningitis
Viral Meningitis
Bacterial Meningitis I: Introduction
Bacterial Meningitis II: Pathophysiology

