The New York City Department of Health and Mental Hygiene (DOHMH) gets clinical and research center reports for rubella. Since rubella immunoglobulin M (IgM) measures may create bogus positive outcomes and rubella diseases might be asymptomatic, understanding of positive IgM results can be testing. Rubella reports got by DOHMH in 2012 to 2013 were surveyed. The rubella IgM testing object was resolved through case examination. 

Aftereffects of IgM testing by roundabout chemical connected immunosorbent examine (ELISA) and catch catalyst immunoassay (EIA) were contrasted with decide positive prescient worth (PPV) and particularity. DOHMH got 199 rubella reports; 2 were genuine cases. Of all reports, 77.9% were tried for rubella IgM incorrectly, 19.6% were tried for demonstrative purposes, 2.0% had obscure test reasons, and 0.5% were not tried. PPV of circuitous ELISA was 6% by and large, 14% for symptomatic tests, and 0% for tests requested incorrectly. PPV of catch EIA was 29% generally, half for indicative tests, and 0% for tests requested incorrectly. 

In general, particularity was 52% for circuitous ELISA and 85% for catch EIA. Restricting rubella IgM testing to patients for whom rubella finding is suspected and utilizing a more explicit IgM examine can possibly diminish bogus positive rubella IgM results.

Reference link- https://cvi.asm.org/content/24/9/e00102-17

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