How likely is it to transmit chlamydia?
Sarah Duran
Updated on March 20, 2026
What are the risks of getting chlamydia? The rate of transmission from one sexual encounter per sex act with a chlamydia-positive individual is approx. 4.5 %, but this rate is slightly higher for receptive sex (receving vaginal or anal sex).
How likely is it to get chlamydia from someone who has it?
Myth: You can't catch chlamydia if you've only had sex once. Fact: If you have sex once with a partner who's got chlamydia, you've got around a 30% chance that you'll pick up the infection from that one time. That's all it takes.Does someone with chlamydia always pass it on?
Often the disease has no symptoms. You can pass chlamydia to others without knowing it. Chlamydia is easy to treat and cure. If you do not treat chlamydia, it can lead to serious health problems.Is chlamydia 100 percent contagious?
The rate of transmission from one sexual encounter per sex act with a chlamydia-positive individual is approx. 4.5 %, but this rate is slightly higher for receptive sex (receving vaginal or anal sex).Can chlamydia lay dormant and not be passed on?
Because chlamydia can be dormant for years without being symptomatic, infected persons may easily transmit the disease to sexual partners without knowing. The ability to lie dormant may also be a reason why chlamydia is so good at hiding in the digestive system despite being eradicated elsewhere.Chlamydia - sexually transmitted infection (video)
Can one partner test positive for chlamydia and the other negative?
A: It is quite common for one partner to test positive and the other negative, even if they have been having sex without condoms. Mostly this is explained by luck and the role of other risk factors.Can one person have chlamydia and their partner not?
People get STDs by having sex with someone who has an STD. Once you are infected, you can infect someone else. Both gonorrhea and chlamydia often have no symptoms. Sometimes only one partner will have symptoms, even though both have the disease.How come I have chlamydia and my partner doesn t?
Heather Corinna replies: If you had a partner before him for oral, vaginal or anal sex, that could be who you got it from and your current partner managed not to contract it from you (now or yet), or contracted it so recently that he isn't testing positive yet.How long can chlamydia lie dormant?
Most people who have chlamydia don't notice any symptoms.If you do get symptoms, these usually appear between 1 and 3 weeks after having unprotected sex with an infected person. For some people they don't develop until many months later. Sometimes the symptoms can disappear after a few days.
Why did I test positive for chlamydia but my partner tested negative?
The short answerYes, it is possible to contract a STI from someone who tested negative (for the STIs that they were tested for)… if (and only if!) they were positive for an STI that they weren't tested for. Or if they were positive for an STI in a location that didn't get tested, such as in the mouth and throat.