The Crithidia luciliae immunofluorescent test for the detection of antibodies to native DNA.

The Crithidia luciliae test was compared with the radioimmunoassay technique for n DNA antibodies on 93 randomly selected sera submitted for antibody testing, and was found to be a highly specific, reproducible and economical test. It appeared to be less sensitive than the radio-immunoassay technique in sera from some of the patients, but analysis of the clinical findings showed that the C. luciliae test correlated better with the clinical assessment of these patients.