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Objective:To explore the carrier status of group B streptococci (GBS) in pregnant women of Mongolian and Han nationality and the neonatal GBS infection in order to identify the high risk factors of GBS infection in Mongolian and Han newborns in this area.Methods:Totally 7289 pregnant women and their newborns born alive were tested for GBS in the Affiliated Hospital of Inner Mongolia Medical University from June 2017 to June 2020, and their newborns were cultured for GBS, and the venous blood of newborns delivered by GBS positive women were detected for anti-GBS capsular polysaccharide antibody level, in order to determine the high risk factors of neonatal GBS infection.Results:Among the 7289 pregnant women, 3136 were Mongolian pregnant women (2599 full-term delivery and 537 premature delivery) and 4153 were Han pregnant women (3541 full-term delivery and 612 premature delivery). The results of GBS test showed that the GBS carrier rate was 8.19% in the Mongolian preterm delivery group, 4.35% in the Mongolian term group, 11.93% in the Han preterm group, and 5.76% in the Han term group, indicating that the carrier rate of GBS in the preterm group was significantly higher than that in the term group, regardless of Mongolian and Han nationality ( P < 0.05). Further comparing the GBS carrier rate of Mongolian and Han pregnant women, the GBS carrier rate of Mongolian pregnant women was significantly lower than that of Han pregnant women regardless of the premature delivery group and term group ( P < 0.05). (2) A total of 434 newborns were born by GBS positive parturients. The positive rates of GBS in Mongolian premature infants, Mongolian full-term infants, Han premature infants and Han full-term infants were 29.55%, 14.16%, 31.51% and 17.65%, respectively, suggesting that the positive rate of GBS in premature infants was significantly higher than that in full-term infants, regardless of Mongolian and Han nationality ( P<0.05). Further comparing the positive rate of GBS in Mongolian and Han newborns, there was no significant difference in the positive rate of GBS between Mongolian newborns and Han newborns, no matter the premature delivery group and the full-term group. (3) This study compared the incidence of early-onset GBS septicemia in Mongolian and Han newborns. The results showed that the incidence of early-onset GBS septicemia in Mongolian premature infants was 23.08%, and none in full-term infants. The incidence of early-onset GBS septicemia in Han premature infants was 26.09%. The incidence of early-onset GBS septicemia in term infants was 5.56%. The incidence of neonatal GBS septicemia in the preterm group was significantly higher than that in the term group, regardless of Mongolian and Han nationality. By further comparing the incidence of GBS septicemia in Mongolian and Han newborns, there was no significant difference in the positive rate of GBS between Mongolian newborns and Han newborns regardless of the premature delivery group and the term group. (4) In both Mongolian and Han nationality, the level of anti-GBS capsular polysaccharide antibody in premature infants was significantly lower than that in term infants ( P < 0.05). (5) Regardless of the Mongolian and Han nationality, compared with GBS negative group, GBS positive rate was higher in pregnant women aged≥35 years old, with history of menstruation, miscarriage, vaginitis, floating population, and those who had not undergone pre-pregnancy examination,,which were the high risk factors for GBS-positive pregnant women during pregnancy. (6) In both Mongolian and Han nationality, the incidence of chorioamnionitis, puerperal infection, premature delivery and premature rupture of membranes in the GBS positive group was higher than that in the GBS negative group, and the incidence of fetal distress and neonatal asphyxia in the GBS positive group was also higher than that in the GBS negative group. Conclusions:The carrier rate of GBS in Mongolian pregnant women is lower than that in Han pregnant women, and positive GBS during pregnancy will increase the incidence of adverse maternal and fetal outcomes such as chorioamnionitis, puerperal infection, premature delivery, premature rupture of membranes, fetal distress, neonatal asphyxia and neonatal early-onset GBS septicemia. The high risk factors are maternal age ≥ 35 years old, history of menstruation, abortion, vaginitis, floating population, and infection without pre-pregnancy examination. We should attach great importance to the perinatal high risk factors and formulate corresponding intervention measures accordingly, and make rational use of antibiotics for prenatal prevention, so as to further reduce the incidence of early-onset GBS septicemia in newborns.
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Objective To understand the colonization status of Streptococcus pneumoniae and Haemophilus influenzae in nasopharynx of healthy infants in Wuhan. Methods Six vaccination clinics were randomly selected, and the nasopharyngeal specimens of healthy infants were collected and cultured for Streptococcus pneumoniae and Haemophilus influenza. Results The carrying rate of Streptococcus pneumoniae and Haemophilus influenzae in 998 healthy infants was 18.84% and 17.54%, respectively. The carrying rate of Streptococcus pneumoniae and Haemophilus influenzae within 6 months of age was 15.79% and 14.39%, and the carrying rate of Streptococcus pneumoniae and Haemophilus influenzae at 7-12 months old was 22.90% and 21.73%, respectively. The difference was statistically significant (Sp: χ2=5.60 P=0.02; Hi：χ2=8.98 P=0.00); The carrying rate of Streptococcus pneumoniae in urban and suburban areas was 18.08% and 19.78%, respectively, and the Haemophilus influenzae carrying rate was 17.18% and 17.98%, respectively. The differences were not statistically significant (Sp：χ2=0.47 P=0.50; Hi：χ2=0.11 P=0.74). The correlation coefficient (r value) of the age of the month and the carrying rate of sp and hi was 0.98 and 0.96, respectively. Conclusion The age of healthy infants in Wuhan was highly linearly and positively correlated with the carrying rate of Streptococcus pneumoniae and Haemophilus influenza.
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Objective To understand the present situation of the rate of carry genetic defect in Unmarried young men with thalassaemia in Shenzhen,which will provide a scientific basis for correct mating.Methods Randomly selected 6 182 cases of unmarried young people from March 2014 to October 2015 to hospital physical examination,Used Sysmex XN-9000 auto-matic blood cell sextant and erythrocyte osmotic fragility test to sccreen preliminarily for globin generation barrier anemia. The average red blood cell volume (MCV)≤82 fl and the average content of red blood cell (MCH)≤27 pg or osmotic fra-gility of red blood cells rate<60% of the population was made hemoglobin electrophoresis analysis.To early screening posi-tive by PCR,it was done reverse dot hybridization method for gene diagnosis,and the results were analyzed.Results 6 182 cases of unmarried young men at the beginning of globin generation barrier anemia screen positive rate was 17.3% (1 069/6 182),including suspectedα-was 12.2% (752/6 182)and suspiciousβ-was 5.1% (317/6 182).Gene diagnosis of globin generation barrier anemia positive rate was 11.6% (717/6 182),theα-was 6.7% (413/6 182),β-was 3.4% (209/6 182) and compoundαβ-was 1.5% (95/6 182).α-genetic defect types were mainly--SEA/αα,-α3.7/ααand-α4.2/ααand defect rate were 60.8%,23.5% and 10.4%,respectively.β-gene defect types are mainly CD41/42,CD17 and-28,defect rate were 41.1%,28.2% and 12.9%,respectively.Conclusion Unmarried young men in shenzhen area globin generation barrier ane-mia has certain carrying rate,local family planning department attaches great importance to it.Strengthen the unmarried young men globin generation barrier anemia screening,to guide the healthy birth mating and prevention of severe pauper’s birth,improve the rate of eugenic and superior nurture,has the vital significance.