Chlamydia: The Silent STI Detected With One Test

Chlamydia (Chlamydia trachomatis) is the most frequent bacterial sexually transmitted infection — and the most discreet: in the majority of cases it causes no symptom at all, in women as in men. That silence is what makes it dangerous, and it is why PCR screening, simple and reliable, exists in our medical analysis laboratory in Tangier.

A most often invisible infection

When signs exist, they are discreet: burning when urinating, unusual discharge, pelvic pain in women; discharge or urinary discomfort in men. But most infected people notice nothing — and pass the infection on without knowing. Chlamydia mostly affects people under 30, and is transmitted during unprotected sex of any kind.

Why screen for it if it causes no trouble?

Because untreated, the infection can climb. In women it can reach the uterus and tubes (salpingitis) and leave sequelae that matter: difficulty conceiving, higher risk of ectopic pregnancy. In men it can affect the epididymis. These complications build in silence, sometimes over years — while the infection itself treats very simply with an antibiotic prescribed by the doctor. The whole point is finding it in time: that is exactly what screening is for.

How does the test work?

PCR directly detects the bacteria's DNA, with excellent sensitivity. Depending on the prescription: on first-catch urine (do not urinate in the previous 2 hours) or on a local swab taken at the laboratory. No appointment, full confidentiality — the same sample can also test for mycoplasmas, often prescribed together. If positive, your doctor prescribes the treatment, treats the partner(s) too — indispensable to avoid reinfecting each other in a loop — and may propose a later control.

Frequently asked questions

What are the symptoms of chlamydia?

Most often: none. When they exist: urinary burning, unusual discharge, pelvic pain. The absence of symptoms says nothing — the test settles it.

Is it serious?

Treated, no: the infection heals simply and without sequelae. Untreated, it can climb and affect fertility, especially in women. It is the typical infection where screening changes everything.

Who should get screened?

Anyone with a new partner or multiple partners, after unprotected sex, with even discreet symptoms, or when a partner tests positive. When in doubt, simply ask your doctor — or come to the laboratory with a prescription.

How is the sample taken?

Most often a simple first-catch urine (do not urinate in the previous 2 hours), or a local swab done at the laboratory in moments. PCR result, confidential.

Should my partner be treated too?

Yes — that is the rule with chlamydia: treat both at the same time, otherwise one reinfects the other. The doctor organises this, and a later control may be proposed.

Can you catch it several times?

Yes: healing does not protect against a new infection. Condoms with a new partner and screening at key moments remain the two tools that work.

This article is part of our PCR series, with our PCR & molecular biology department and our articles on positive HPV test and hepatitis B viral load. For the full picture: our STI screening guide.