False negatives on tests for Chlamydia

Russell Farris tryggvi at email.msn.com
Tue Jan 26 03:07:38 EST 1999

        I was recently tested for Chlamydia pneumoniae and was very
surprised when the results came back negative. I found an article by a
veterinarian that said that many antibiotics would interfere with ELISA,
serology, and other tests for Chlamydia psittaca. I found similar articles
dealing with Lyme disease and Helicobacter pylori. None of these articles
listed any citations. I had just completed a course of doxycycline when the
tests were initiated.

        Would aspirin or vitamins affect the results of these diagnostic

        I would very much appreciate pointers to information on factors that
can cause false negative results from these tests. I can't get my HMO to
give me azithromycin until I get positive test results, even though my GP
and the infectious diseases guy both think I have Cp. Thanks,

Russ Farris

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