Could treatment for gon/chlam w/ ceftriaxone and azith cause an rpr test to be false neg 3 months later? initial exposure was oct 18, and gon/chlam treatment was oct 30. rpr was done mid feb and neg. hiv neg. no other exposures. conclusive result?

One dose of ceftriaxone is not effective for treating primary or secondary syphilis but a 2 gm dose azithromycin may be effective if you did not acquire macrolide-resistant T. pallidum which is present in multiple U.S. geographic areas. So if you received 2 gm of azithromycin and the T. pallidum is not resistant to this antibiotic, you may be cured with that dose and the RPR may become negative.