“Everybody Has Chlamydia…” — What This Statement Really Means

Many patients come to consultation worried after hearing statements such as:

“Everybody has chlamydia.”or“Your blood test is positive, so you definitely have an infection.”

In reality, these statements are often misunderstood.

What Is Chlamydia?

Chlamydia is a sexually transmitted infection (STI) caused by a bacterium called Chlamydia trachomatis.

It is mainly transmitted through unprotected sexual contact.

Chlamydia is one of the most common bacterial STIs worldwide, especially among young adults.

Who Is Most Affected?

Chlamydia infections are more common:

• in people under 25 years old;

• in individuals with multiple sexual partners;

• in cases of unprotected sexual intercourse.

In sub-Saharan Africa, including Cameroon, studies suggest that prevalence is higher among sexually active young women, particularly between 15 and 29 years of age.

Depending on the population studied and the testing methods used, prevalence estimates in African studies often range between approximately 5% and 15%.

This means chlamydia is common — but that does not mean “everyone has it.”

Why Do Some People Say “Everybody Has Chlamydia”?

Very often, there is confusion between:

• an active infection;

• and evidence of past exposure detected through antibodies.

Some blood tests look for antibodies against chlamydia.These antibodies may remain positive long after a previous contact with the bacteria.

Therefore, a positive serology does not necessarily mean that a person currently has an active infection.

PCR: The Gold Standard Test

Today, the gold standard for diagnosing an active chlamydia infection is PCR testing.

PCR detects the genetic material of the bacterium directly.

It can be performed using:

• a vaginal swab;

• a cervical swab;

• a urine sample;

• or other specific samples depending on the situation.

PCR is far more reliable than serology for determining whether an infection is currently present.

So What Is Serology Used For?

Serology is generally not the best test for diagnosing a routine genital chlamydia infection.

However, it may sometimes be useful in specific situations such as:

• infertility investigations;

• suspicion of previous tubal infection;

• certain specialized medical evaluations.

In daily clinical practice, a positive serology alone cannot confirm an active infection.

What Are the Symptoms?

One of the main issues with chlamydia is that many people have no symptoms at all.

When symptoms occur, they may include:

In women:

• abnormal vaginal discharge;

• burning during urination;

• pelvic pain;

• pain during intercourse;

• bleeding after intercourse.

In men:

• burning during urination;

• penile discharge;

• testicular pain.

What Can Chlamydia Cause?

If left untreated, chlamydia may lead to:

• pelvic inflammatory disease;

• fallopian tube damage;

• chronic pelvic pain;

• ectopic pregnancy;

• fertility problems.

This is why appropriate screening and treatment are important.

Chlamydia and Infertility

A previous infection can sometimes leave damage to the fallopian tubes, even after the bacteria are no longer present.

This is one reason why serology may occasionally have value during infertility investigations.

Again, however:a positive serology does not automatically mean an active infection.

Chlamydia and Skin Problems: Many Misconceptions

Some patients undergo testing for “hidden chlamydia” because of almost any skin symptom, including:

• itching;

• pimples;

• hives;

• diffuse redness;

• eczema.

In the vast majority of cases, these symptoms are not caused by chlamydia.

Which Skin Conditions Can Actually Be Linked to Chlamydia?

Rarely, chlamydia may be associated with:

• certain forms of conjunctivitis;

• reactive arthritis;

• uncommon inflammatory skin lesions occurring as part of a reactive syndrome.

However, chronic itching or common skin rashes do not routinely justify chlamydia testing.

In Summary

• Chlamydia is common, especially among young adults.

• Many infections are completely silent.

• PCR is the best test for diagnosing an active infection.

• Serology is often difficult to interpret.

• A positive serology does not necessarily mean current disease.

• Most skin problems are not caused by chlamydia.

• Proper medical interpretation helps avoid unnecessary anxiety and inappropriate treatment.

In medicine, the most important thing is not only to perform tests, but also to interpret them correctly.A positive result does not always mean an active disease.My role is to provide clear explanations, an accurate diagnosis, and appropriate care — without minimizing concerns, but also without causing unnecessary anxiety.

Take care of yourself.

Kind regards,

Dr Sandra Yene Amougui