| serology | <immunology, investigation> A blood test that detects the presence of antibodies to a particular antigen (for example rheumatoid factor, HIV test). (28 May 1998) |
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| brucella serology | <microbiology> An blood analysis that detects the presence of antibodies against Brucella bacteria. This test may need to be repeated since the antibodies increase with duration of infection. (27 Sep 1997) |
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| lyme disease serology | A blood test which measures for the presence of Lyme disease antibodies. A nonreactive or serum titre of less than 1:256 is normal. A rising titre over time is more diagnostic. False positives due occur in those with rheumatoid arthritis and lupus. (27 Sep 1997) |