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Diagnosis of gardnerellosis: modern methods and approaches
Gardnerellosis, or bacterial vaginosis, is a condition in which the balance of the vaginal microflora is disrupted, and instead of lactobacilli, opportunistic microorganisms dominate, in particular Gardnerella vaginalis. The infection does not always cause vivid symptoms, but this is precisely the danger: the disease can remain unnoticed for a long time, leading to complications. The diagnosis of gardnerellosis aims not only to confirm the presence of the bacteria, but also to assess the state of the vaginal microflora as a whole.
Risk factors and when to get tested
The risk of developing gardnerellosis increases under certain conditions:
frequent change of sexual partners;
use of intrauterine contraceptives;
prolonged antibiotic therapy;
decreased immunity;
hormonal disorders.
Examination for gardnerellosis is recommended not only if symptoms are present (unusual discharge, itching, discomfort), but also as a preventive measure - for example, before planning a pregnancy or undergoing surgical interventions in gynecology.
Clinical signs and examination significance
The doctor may suspect gardnerellosis during the examination: characteristic gray-white discharge with a "fishy" odor, irritation of the mucous membrane, increased pH. However, clinical examination alone is not enough, so laboratory methods are always used.
Methods for diagnosing gardnerellosis
| Method | The essence of the study | Advantages | Disadvantages |
|---|---|---|---|
| Smear microscopy | Identifying "key cells" under the microscope | Fast, affordable | Subjectivity of assessment |
| Bacteriological culture | Growing a crop G. vaginalis | Allows you to determine sensitivity to antibiotics | Longevity (3–7 days) |
| PCR | Detection of bacterial DNA | High accuracy, even with small quantities | High cost |
| pH analysis | Measuring the acidity of vaginal discharge | Simple diagnostics of microflora changes | Used only as an additional method |
| Amine test | Detection of a "fishy" odor after reaction with alkali | Fast, inexpensive | Used only in the complex |
Amsel's criteria
The most common clinical diagnostic system for bacterial vaginosis is: The diagnosis is confirmed if at least 3 of 4 signs are present:
Homogeneous gray-white discharge.
pH greater than 4.5.
Positive amine test.
Presence of "key cells" under microscopy.
Nugent's method (Nugent score)
This is a microbiological system for evaluating a smear on a scale from 0 to 10. It takes into account the ratio of lactobacilli, gardnerella, and other anaerobes.
0–3 points: normal (lactobacteria predominate).
4–6 points: intermediate state.
7–10 points: bacterial vaginosis.
This method is considered the «gold standard» of diagnosis in scientific research.
Diagnostic features in men
Although gardnerellosis is considered a «female infection,» men can be carriers of it. Most often found:
urethritis with minor discharge;
discomfort during urination;
asymptomatic carrier.
For diagnosis, they are used PCR and bacteriological culture from the genitourinary tract.
Modern molecular methods
In addition to classical tests, multiplex PCR methods are increasingly being used, which allow the detection of several infectious agents at once (for example, gardnerella, mycoplasma, chlamydia) from a single sample. This is especially important in mixed infections.
Why is early diagnosis so important?
reduces the risk of complications during pregnancy (premature birth, chorioamnionitis);
prevents the development of pelvic inflammatory diseases;
reduces the risk of infertility;
allows you to choose effective treatment and prevent relapses.
Practical recommendations for patients
If symptoms appear, you should immediately consult a doctor and not self-medicate.
Self-administration of antibiotics can lead to bacterial resistance.
It is important for both partners to be tested, even if the man has no symptoms.
For women, a follow-up analysis is recommended after treatment to assess the restoration of microflora.
Advanced comparison of diagnostic methods
| Method | Sensitivity | Speed | Accessibility |
|---|---|---|---|
| Microscopy | 60–70 % | 1 day | High |
| Back-sowing | 70–80 % | 3–7 days | Medium |
| PCR | 90–95 % | 1–2 days | Medium–high |
| Nugent score | 85–90 % | 1–2 days | Used in specialized laboratories |
Diagnosis of gardnerellosis today is a combination of clinical examination, classical microbiological methods and modern molecular tests. Such a comprehensive approach allows you to quickly and accurately detect the infection, assess the state of the microflora and prescribe treatment that will be as effective as possible. Taking care of your own health and timely examination is the best way to preserve reproductive well-being and confidence in the future.
