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Methods for detecting sexually transmitted diseases: what modern laboratory diagnostics are changing
Diagnosis of sexually transmitted diseases: the key to health
Sexually transmitted infections (STIs) have a complex and often hidden course. This makes diagnosis difficult, but modern laboratory medicine provides several effective methods that allow detecting pathologies even at an asymptomatic stage. Proper testing allows you to start treatment on time and prevent chronic complications.
The choice of method depends on the clinical picture.
Doctors are not limited to one method, as different pathogens require different approaches. The following groups of methods are most commonly used:
Imaging and microscopy
Swabs from the urogenital tract are examined under a microscope to detect pathogens such as gonococci, trichomonads, and yeast. This method is rapid, but its sensitivity is low.
Bacteriological culture
It is performed on a nutrient medium. It allows not only to identify the bacterium, but also to determine its resistance to antibiotics. It is often used in chronic or recurrent disease.
Enzyme-linked immunosorbent assay (ELISA)
Assesses the level of antibodies in the blood. Used to diagnose chlamydia, syphilis, hepatitis, HIV. May indicate active or past infection.
Polymerase chain reaction (PCR)
This is a molecular method that detects the genetic material of the pathogen (DNA or RNA). The most sensitive, it allows you to detect the infection even before the appearance of symptoms. Suitable for the analysis of chlamydia, mycoplasma, ureaplasma, HPV, HSV, etc.
Conditional classification: when is which method effective?
| Method | What does it reveal? | Best use |
|---|---|---|
| Microscopy | Fungi, bacteria | Initial review |
| Sowing | Live bacteria | Antibiotic resistance |
| ELISA | Antibodies | Chronic infections, HIV, syphilis |
| PCR | DNA/RNA | Early diagnosis, asymptomatic course |
Aspects of choosing a laboratory test
When prescribing tests, the following is taken into account:
duration of symptoms or asymptomatic course
having multiple partners
STIs
age and reproductive plans
It is recommended to get tested annually or after each change of partner. If one infection is detected, it is important to also get tested for others - they often coexist.
What else should the patient know?
Most often, tests are taken from urine, a swab, blood, and sometimes ejaculate.
Some STIs require testing both before and after treatment to confirm recovery.
The incubation period varies — sometimes the test should be repeated after 2–3 weeks.
Timely detection of sexually transmitted diseases is not only a personal responsibility, but also a manifestation of care for your partner. Modern laboratory diagnostics make this process accurate, comfortable and effective.
