The CDC recommends that individuals who have been treated for certain STDs are retested again after treatment. This is generally because reinfection is common for certain STDs, particularly if a sexual partner was not also treated at the same time.
- Chlamydia - retest 3 months after treatment
- Gonorrhea - retest 3 months after treatment and earlier retesting may also be required if symptoms persist due to drug-resistant strains
- Trichomoniasis - retest 3 months after treatment
- Syphilis - retesting in the 3rd trimester and at delivery for high-risk females