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Serological reactions to Nocardia antigens
The American Journal of the Medical Sciences
|May 1, 1975
Summary
Precipitating antibodies against Nocardia asteroides were detected in sera from patients with nocardiosis. Some patients with tuberculosis and leprosy also showed these antibodies, indicating potential cross-reactivity.
Area of Science:
- Medical Microbiology
- Immunology
Background:
- Nocardiosis is an opportunistic infection caused by Nocardia species.
- Diagnostic methods for nocardiosis can be challenging.
Purpose of the Study:
- To investigate the presence of precipitating antibodies against Nocardia asteroides in patients with nocardiosis and other conditions.
Main Methods:
- Sera from patients with nocardiosis, tuberculosis, leprosy, and other fungal or bacterial infections were tested.
- Precipitin reactions were performed against an extract of Nocardia asteroides.
Main Results:
- Antibodies were found in 9/20 patients with Nocardia asteroides and 1/3 with Nocardia brasiliensis infections.
- Antibodies were also detected in 8/55 patients with tuberculosis and 11/13 with leprosy.
- No antibodies were found in patients with other mycoses, Staphylococcus aureus, Pseudomonas, or healthy controls.
Conclusions:
- Precipitating antibodies against Nocardia asteroides are present in patients with nocardiosis.
- Cross-reactivity with antibodies in tuberculosis and leprosy patients suggests a potential diagnostic challenge or shared antigenic determinants.