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Aids in the diagnosis of leptospirosis
This test is intended to be used as an aid for the diagnosis of acute or recent leptospirosis due to infection with Leptospira species.
This is a qualitative immunoblot test for detection of IgM-class antibodies to Leptospira species. A negative result by this assay does not exclude the possibility of leptospirosis and all results must be correlated with clinical presentation and exposure history.
Positive: IgM antibodies to Leptospira species detected suggesting recent infection. Antibody presence alone cannot be used to definitively diagnose acute infection, as antibodies from a prior exposure or infection may remain detectable for a prolonged period of time.
Borderline: Result should be interpreted with caution. Additional testing of a second, convalescent specimen is recommended. If the specimen remains borderline reactive, a second serological method should be considered if leptospirosis infection is still suspected.
Negative: No IgM antibodies to Leptospira detected. Since antibodies may not be present or may be present at undetectable levels during early disease, repeat testing of a convalescent sample collected in 2 to 3 weeks is recommended.