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Micropolyspora faeni and farmer's lung disease
The Journal of Hygiene
|March 1, 1973
Summary
This study identifies key Micropolyspora faeni antigens for diagnosing farmer's lung disease (FLD). Concentrated culture supernatant and ultrasonic mycelial extracts are recommended for accurate FLD laboratory diagnosis.
Area of Science:
- Immunology
- Microbiology
- Pulmonary Medicine
Background:
- Farmer's lung disease (FLD) is a hypersensitivity pneumonitis.
- Accurate laboratory diagnosis relies on identifying specific antigens from Micropolyspora faeni.
- Current diagnostic preparations may not fully represent all relevant antigens.
Purpose of the Study:
- To identify and characterize serologically active antigens from Micropolyspora faeni for improved FLD diagnosis.
- To evaluate the diagnostic utility of different antigen preparations.
- To determine the source of hypersensitivity in FLD.
Main Methods:
- Culturing Micropolyspora faeni and extracting serologically active materials.
- Utilizing immunodiffusion and immunoelectrophoresis for antigen analysis.
- Testing patient sera for antibody presence against various M. faeni antigens.
Main Results:
- Concentrated culture supernatant (CS) and ultrasonic mycelial extracts (MU) showed significant serological activity.
- CS and MU share common antigens but also possess unique ones.
- Antibodies to CS and MU were most prevalent in FLD patient sera, unlike spore-derived materials.
Conclusions:
- Concentrated culture supernatant and ultrasonic mycelial extracts are crucial for FLD diagnostic preparations.
- Mycelial antigens, not spore antigens, are likely responsible for hypersensitivity in FLD.
- Further research into these specific mycelial antigens can refine FLD diagnostics.
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