Mycoplasma Infection of Cervicovaginal Fluid in Women with Preterm Labor / 대한주산의학회잡지

OBJECTIVE: To evaluate the infection rate of cervicovaginal U. urealyticum and M. hominis in normal full-term and preterm labor women, to know whether these infections are related to the increase of preterm labor incidence. METHODS: We took the test for U. urealyticum and M. hominis in cervicovaginal fluid in 35 cases of premature labor women and 74 cases of normal full-term women. Culture of U. urealyticum and M. hominis with Mycoscreen kitR and other bacterial culture were performed, simultaneously. Clinical outcomes were reviewed and the test results between preterm labor and full-term pregnancy group were compared. Student t-tests and Chi-square, Fisher's exact test were used to determine the statistical significance. RESULTS: The infection rates of U. urealyticum in preterm labor group and normal full-term group were 71.4% (25/35 cases) and 58.1% (43/74 cases), respectively (p>0.05). The M. hominis infection rates in premature labor group and normal full-term group were 20% (7/35 cases) and 2.7% (2/74 cases), respectively (p<0.01). Other bacterial infection rates in premature labor and normal full-term group were 31.4% (11/35 cases) and 10.8% (8/74 cases), respectively (p<0.01). Among the premature labor women, the duration of pregnancy prolongation after onset of premature labor was significantly longer in M. hominis positive group than that in M. hominis negative group (21.7 days vs 3.5 days). CONCLUSION: The lower genital tract infection may be an important causative factor of premature labor, especially with colonization of M. hominis. It was suggested that the efforts of obstetricians to detect and control genital M. hominis and bacterial infection may, in some degree, prevent the preterm labor and birth.

PCR assays for differential detection of Ureaplasma parvum and Ureaplasma urealyticum / 第三军医大学学报

Objective To establish two PCR assays to rapidly and simultaneously detect U.parvum and U.urealyticum.Methods Two PCR assays were established through designing two sets of specific primer targeting urease gene B of U.parvum and U.urealyticum,respectively.The standard strains of U.parvum and U.urealyticum and the clinical samples were detected by these PCR assays and PCR products of the standard strains and two clinical specimens were directly sequenced and carried out specific and sensitive assays.Forty-eight clinical specimens were tested for culture and the PCR assays and tow methods were compared.Results The standard strains of U.parvum,U.urealyticum and the clinical specimens were successfully and differentially detected by the PCR assays and the sequencing results were found to have a complete similarity to the GenBank sequences.The 14 strains of other bacterial genera including 5 strains that produced urease were not amplified by these PCR assays.Each assay had a detection limit of 10 copies/?l of plasmid DNA.The positive rate in 48 clinical specimens by PCR(54.2%)was higher than that by culture(39.6%)(P