a positive test in someone not at sexual risk, but who has been at risk (other partners, etc)
in the distant past.
In some infected people, chlamydia may set up housekeeping in the intestines, either from an original infection in the throat from oral sex, or in the rectum either by anal sex or contamination of the anal area from the genital area. Research suggests that chlamydia may sometimes lie dormant for years in the intestine, then migrate back to the genital tract, especailly in women (i.