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  • Title: [Comparison of polymerase chain reaction and enzyme immunoassay (Chlamydiazyme) in detection of Chlamydia trachomatis from male urethritis].
    Author: Deguchi T, Yamamoto H, Tada K, Iwata H, Komeda H, Saito A, Ito Y, Ban Y, Tamaki M, Maeda S.
    Journal: Kansenshogaku Zasshi; 1992 Feb; 66(2):172-6. PubMed ID: 1402077.
    Abstract:
    A method using polymerase chain reaction (PCR) was compared to an enzyme immunoassay (Chlamydiazyme) for detection of Chlamydia trachomatis by testing a reference strain and clinical specimens. Two oligonucleotides based on sequences within the major outer membrane protein gene from C. trachomatis serovar L2 were used as primers for the PCR. A DNA fragment of 242 bp specific for C. trachomatis was amplified by the PCR, when DNA of greater than or equal to 10(2) C. trachomatis was used as template for the PCR. A chlamydial antigen was detected by Chlamydiazyme, when greater than or equal to 2.6 x 10(3) C. trachomatis were applied for the enzyme immunoassay. The PCR method was 26 times more sensitive than Chlamydiazyme in detection of C. trachomatis. The PCR method and Chlamydiazyme were carried out to examine 74 urethral swabs obtained from male patients with urethritis for detection of C. trachomatis. In 45 of 74 specimens, the DNA fragment of C. trachomatis was amplified by the PCR, and in 41 of 74, the chlamydial antigen was detected by Chlamydiazyme. The detection rate of the PCR method (60.8%) was higher than that of Chlamydiazyme (55.4%). The positive coincidence rate of the PCR method to Chlamydiazyme was 100% (41/41) and negative coincidence rate was 87.9% (29/33). The overall coincidence rate between the two methods was high (94.6%). Thus, the PCR method was more sensitive than Chlamydiazyme for detection of C. trachomatis and specific for diagnosis of chlamydial urethritis.
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