Chlamydia detection methods are as follows: 1, general detection: there are antigen detection, enzyme-linked immunosorbent assay, that is, the usual ELISA method. Detection of clinical specimens in the chlamydial antigen the method is sensitive, easy and fast, but there is a cross-reactivity with bacteria, can be false positive, especially nasopharyngeal specimens; 2, nucleic acid detection: even if the usual PCR method for the detection of chlamydial DNA, can be directly identified from the specimen chlamydial species and type; 3, antibody detection: genital tract infection without complications patients can produce low levels of antibodies, about 20% of patients with acute chlamydial urethritis do not produce antibodies. Commonly used methods include complement binding test, micro indirect immunofluorescence test, direct fluorescent antibody and other methods.