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A 25-year-old female asked:

I had blood test for chlamydia. result says igg ab >/= 1:16 and igm ab < 1:16. does it mean that i had it in the past but not currently?

1 doctor answer1 doctor weighed in
Dr. Hunter Handsfield
Infectious Disease 53 years experience
Maybe past infection: The chlamydia blood tests are pretty much useless. This only indicates you have had infection sometime in your life with chlamydia, or with related non-STD bacteria. (For example, Chlamydophila pneumoniae causes bronchitis etc, is very common, and also give pos result on the blood test.) It's a useless test to diagnose current infection. If at risk, you need a vaginal swab or urine test.

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Last updated Apr 20, 2017

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