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Test ID: GM1B    
Ganglioside Antibody Panel, Serum

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Method Description Describes how the test is performed and provides a method-specific reference

Anti-ganglioside antibodies in serum are detected by enzyme-linked immunosorbent assays (ELISA). Ganglioside antigens (GM1, asialo GM1, and GD1b) adsorbed to wells of ELISA plates are incubated with patient’s serum or controls. The plates are washed and alkaline phosphatase conjugated anti-human IgG or IgM are added in a second incubation. The wash step is repeated and enzyme substrate is added. Absorbance is measured and results are expressed as antibody titer, ie, the greatest dilution at which the absorbance of wells that contain patient’s serum is >2.0 times the mean absorbance of normal sera tested simultaneously.(Taylor BV, Gross L, Windebank AJ: The sensitivity and specificity of anti-GM1 antibody testing. Neurology 1996 October;47:951-955)

Day(s) and Time(s) Test Performed Outlines the days and times the test is performed. This field reflects the day and time the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time required before the test is performed. Some tests are listed as continuously performed, which means assays are performed several times during the day.

Monday, Wednesday; 5 p.m.

Analytic Time Defines the amount of time it takes the laboratory to setup and perform the test. This is defined in number of days. The shortest interval of time expressed is "same day/1 day," which means the results may be available the same day that the sample is received in the testing laboratory. One day means results are available 1 day after the sample is received in the laboratory.

3 days

Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result

8 days

Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded

Negatives - 2 weeks Positives - 6 months

Performing Laboratory Location The location of the laboratory that performs the test

Rochester