Two methods of electrophoresis for the detection of oligoclonal bands in unconcentrated CSF were compared. A sample of 98 routine CSFs yielded 18 positives by polyacrylamide gel electrophoresis (PAGE) while cellulose acetate electrophoresis with immunofixation (CAIF) gave 13 positives (72% of the PAGE findings). Despite the loss of sensitivity the cellulose acetate electrophoresis was easier to interpret and more suited to a routine hospital laboratory.
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