What should be checked for Mycoplasma and Chlamydia testing

Mycoplasma and Chlamydia testing usually includes smear examination of secretions, nucleic acid testing, serological antibody testing, culture testing, and drug sensitivity testing. These tests help to determine the presence of mycoplasma or chlamydia infection and guide subsequent treatment.

1. Secretion smear examination

Smear is made by collecting secretions from the urethra, cervix, and other parts, staining them, and observing under a microscope for the presence of mycoplasma or chlamydia inclusions. This method is easy to operate but has low sensitivity, and may result in false negative results. It is often used as a preliminary screening method. If a large number of white blood cells or abnormal cell structures are found, further confirmation should be conducted in conjunction with other examinations.

2. Nucleic acid testing

uses PCR technology to detect specific DNA fragments of mycoplasma or chlamydia in samples, which has high sensitivity and specificity. Suitable for early infection diagnosis, it can detect pathogens in various samples such as the reproductive tract and throat. Nucleic acid testing can distinguish specific types, such as Mycoplasma pneumoniae, Chlamydia trachomatis, etc., providing a basis for precise treatment.

3. Serological antibody detection

determines the infection status by detecting the levels of IgM and IgG antibodies in the blood. A positive IgM antibody indicates a recent infection, while a positive IgG antibody often indicates a previous or chronic infection. This examination is suitable for the diagnosis of respiratory mycoplasma infection, but it should be noted that there is a window period for antibody production, which may result in false negatives. It is necessary to make a comprehensive judgment based on clinical manifestations.

4. Culture examination

Inoculate the sample into a special culture medium for pathogen isolation and culture, which is the gold standard for diagnosis. Mycoplasma culture takes 3-5 days, while chlamydia culture takes longer. Positive cultivation can confirm the presence of viable bacteria, but the positive rate is relatively low due to factors such as sample collection quality and transportation conditions. It is commonly used in clinical research or for the diagnosis of difficult cases.

5. Antimicrobial susceptibility testing

conducts antibiotic sensitivity testing on cultured positive strains to guide clinical medication selection. It can detect the resistance of Mycoplasma to macrolides, tetracyclines, and other drugs, as well as the sensitivity of Chlamydia to drugs such as doxycycline and azithromycin. Drug sensitivity testing can reduce treatment failure caused by empirical medication, especially for patients with recurrent infections or poor treatment outcomes.

Prior to examination, vaginal flushing, use of antibiotics or topical medications should be avoided, and women should avoid menstrual periods. Avoid urination within 2 hours before collecting urethral secretions, and cough up phlegm in the deep part of the respiratory tract in the morning for respiratory samples. If the test result is positive, medication should be taken according to medical advice, and sexual activity should be avoided until recovery is achieved. Sexual partners should undergo simultaneous examination and treatment. Daily attention to personal hygiene and enhancing immunity can help prevent the recurrence of infections.