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Pleural fluid lysozyme in human disease

M Klockars, T Pettersson, H Riska

Archives of Internal Medicine

|January 1, 1979

Summary

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Elevated pleural fluid lysozyme levels can help diagnose tuberculous pleurisy. This simple test distinguishes tuberculosis from other causes of pleural effusions, aiding in differential diagnosis.

Area of Science:

Pulmonary Medicine
Immunology
Clinical Diagnostics

Background:

Pleural effusions present a diagnostic challenge.
Differentiating tuberculous pleurisy from other causes is crucial for effective treatment.

Purpose of the Study:

To evaluate pleural fluid lysozyme concentration as a diagnostic marker for tuberculous pleurisy.
To compare lysozyme levels in various types of pleural effusions.

Main Methods:

Measurement of lysozyme content in plasma and pleural fluid from 110 patients.
Immunohistochemical identification of lysozyme.
Statistical analysis of lysozyme concentrations and ratios.

Main Results:

Significantly higher pleural fluid lysozyme in tuberculous pleurisy (P < .001).

Related Experiment Videos

Higher pleural fluid-to-plasma lysozyme ratio in tuberculous patients (P < .001).

Lysozyme detected in granulomas and macrophages in tuberculosis, not in carcinoma cells.

Conclusions:

Pleural fluid lysozyme determination is a valuable tool for diagnosing tuberculous pleurisy.
This method offers a simple and fast corroborative diagnostic approach.
Plasma lysozyme levels did not differ significantly across patient groups.