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Related Experiment Video

Updated: Jul 17, 2026

Automated Measurement of Cryptococcal Species Polysaccharide Capsule and Cell Body

Automated Measurement of Cryptococcal Species Polysaccharide Capsule and Cell Body

Published on: January 11, 2018

Molecular identification of Cryptococcus neoformans serotypes.

A Enache-Angoulvant¹, J Chandenier, F Symoens

¹Laboratoire de Parasitologie-Mycologie, Faculté de Médecine Pierre et Marie Curie, site St. Antoine, 27 rue de Chaligny, 75012 Paris, France.

Journal of Clinical Microbiology

|February 9, 2007

Summary

Two new molecular methods, PCR-restriction enzyme analysis and length polymorphism analysis, reliably identify Cryptococcus neoformans serotypes. These methods target the CAP59 gene, offering an alternative to traditional serotyping for this fungal pathogen.

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Last Updated: Jul 17, 2026

Automated Measurement of Cryptococcal Species Polysaccharide Capsule and Cell Body

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Published on: January 11, 2018

Biolistic Transformation of a Fluorescent Tagged Gene into the Opportunistic Fungal Pathogen Cryptococcus neoformans

Biolistic Transformation of a Fluorescent Tagged Gene into the Opportunistic Fungal Pathogen Cryptococcus neoformans

Published on: March 19, 2015

Area of Science:

Medical Mycology
Molecular Biology
Infectious Diseases

Background:

Cryptococcus neoformans causes severe infections, especially in immunocompromised individuals.
Five serotypes (A, B, C, D, AD) are defined based on capsular polysaccharides, with distinct epidemiologic and clinical features.
Current serotyping relies on agglutination or immunofluorescence assays.

Purpose of the Study:

To develop and validate two novel molecular methods for Cryptococcus neoformans serotype identification.
To provide reliable and efficient alternatives to conventional serotyping techniques.

Main Methods:

Polymerase Chain Reaction-Restriction Enzyme Analysis (PCR-REA) targeting the CAP59 gene.
Length Polymorphism Analysis of a CAP59 gene fragment.
Testing on 72 Cryptococcus neoformans strains representing all five serotypes.

Main Results:

Both PCR-REA and length polymorphism analysis demonstrated high reliability in differentiating Cryptococcus neoformans serotypes.
The methods are based on sequence variations within the CAP59 gene, crucial for capsule biosynthesis.
Successful identification of all five serotypes using the described molecular approaches.

Conclusions:

Molecular methods, specifically PCR-REA and length polymorphism analysis of the CAP59 gene, offer accurate and reliable Cryptococcus neoformans serotyping.
These techniques provide valuable tools for the molecular epidemiology and diagnostics of cryptococcosis.