Objective To explore the clinical application of FP-PCR method to detect MP-DNA.Methods Five hundred and sixty-three children suspected of MP infection were enrolled in experimental group. FP-PCR was adopted to detect MP-DNA. MP-DNA was re-detected later in 60 children. At the same time,MP-Ab (MP antibody) was detected by means of particle agglutination. MP-Ab was re-detected one or two weeks later. Also 20 healthy children were selected as the control group. Results The positive rate of MP-DNA and MP-Ab were 34. 99% and 35.52% respectively,which showed no significant difference (x2 =0. 31, P > 0. 05). The coincidence of the two methods was 97. 69%. But the positive rate of MP-DNA was significantly higher than that of MP-Ab in the early stage(30. 48% vs 10. 16%) (x2 = 74. 46, P < 0. 05).The sensitivity and specificity of FP-PCR were 96. 00% and 98.62% respectively. The result of reviewed MP-DNA was consistent with the clinical diagnosis. Conclusion FP-PCR method is very sensitive, convenient and stable. It is fit for the clinical application ,especially the diagnosis of early MP infection. It helps to identify those who had been infected with MP before.

Objective To research the correlation between the level of serum brain natriuretic peptide (BNP) ,soluble vascular endothelial growth factor receptor 1 (sFlt-1) and nitric oxide (NO) and the changes of condition in preeclampsia(PE) patients.Methods Totally 89 patients with PE who had prenatal examina-tion and normal delivery in the hospital from May 2014 to January 2017 were enrolled in this study as the PE group ,and 94 healthy pregnant women who underwent normal delivery during the same period were selected as the NP group.The levels of serum BNP ,sFlt-1 and NO in PE patients with different severity and different onset stages were compared and analyzed.Results The levels of serum BNP and sFlt-1 in the PE group were significantly higher than those in the NP group ,and the level of NO was significantly lower than that in the NP group ,and the differences were statistically significant (P＜0.05).The levels of serum BNP and sFlt-1 in the severe PE group were significantly higher than those in the mild PE group ,and the level of NO was signifi-cantly lower than that in the mild PE group ,and the differences were statistically significant (P＜0.05).The levels of serum BNP and sFlt-1 in the early and late onset PE groups were significantly higher than those in the early NP group and the late NP group ,while the NO levels were significantly lower than those in the early NP group and the late NP group ,and the differences were statistically significant (P＜0.05).Conclusion On the occurrence of PE ,the levels of serum BNP and sFlt-1 in pregnant women elevated abnormally ,and the lev-el of NO decreased.The changes of serum BNP ,sFlt-1 and NO levels are closely related to the development of PE ,and can be used as a reference index to detect the changes of PE.