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SPECIFIC POLYSACCHARIDES FROM FUNGI.

H D Kesten¹, D H Cook, E Mott

¹Department of Pathology, College of Physicians and Surgeons, Columbia University, New York, and the School of Tropical Medicine of the University of Porto Rico under the Auspices of Columbia University, Porto Rico.

The Journal of Experimental Medicine

|October 30, 2009

Summary

This summary is machine-generated.

Researchers isolated polysaccharide fractions from yeast-like fungi and Trichophyton. While direct testing showed limited specificity, absorption methods revealed high specific reactivity, aiding fungal identification.

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Area of Science:

Mycology
Immunochemistry
Biochemistry

Background:

Fungal polysaccharides are key antigens in serological diagnostics.
Yeast-like fungi and dermatophytes like Trichophyton pose diagnostic challenges.
Characterizing specific fungal antigens is crucial for accurate identification.

Purpose of the Study:

To isolate and characterize polysaccharide fractions from specific fungi.
To evaluate the specificity of these fungal polysaccharides using serological methods.
To develop improved methods for identifying fungal species based on polysaccharide antigens.

Main Methods:

Polysaccharide fractions were prepared from five yeast-like fungi and one Trichophyton species.
Direct precipitation tests were performed using fungal polysaccharides and corresponding antisera.
Absorption of precipitins on intact mycotic bodies was employed to assess specific reactivity.

Main Results:

Polysaccharides from yeast-like fungi showed only partial specificity in direct precipitation tests.
Frequent cross-precipitin reactions were observed between different fungal polysaccharides.
Absorption techniques demonstrated a high degree of specific precipitability for these fungal polysaccharides.

Conclusions:

Standard precipitation tests are insufficient for precise identification of these fungal polysaccharides.
Absorption methods significantly enhance the specificity of polysaccharide-based fungal serodiagnostics.
This approach offers a more reliable method for differentiating fungal species.