Objective To investigate the clinical application value of three-dimensional ultrasonic inspection in prenatal diagnosis.Methods 90 cases of fetal formations were Tetrospecthely analysed,which were diagnosed by two-dimensionul associtated with three-dimensional ultrasonic inspection.We compared the ultrasonic inspection with the clinical diagnosis.Results The all coincidence rate was 100%by combining the two measures,three-dimensional ultrasonic inspection can make up the defect of two-dimemional ultrasonic inspection.Conclusion Two-dimensional combined with three-dimensional ultrasonic inspection can accurately diagnose fetal formations,and increase the detection rate.

Objective To explore the carry rate and antimicrobial resistance of Staphylococcus aureus (S.aureus) among primary school students.Methods Nasal swab samples were collected from healthy primary school students in Guangzhou.Antibiotic susceptibility testing was applied to test S.aureus strains.Results The overall carriage rate of S.aureus,methicillin-resistant S.aureus (MRSA) and multi-drug-resistant S.aureus (MDRSA) among 1 012 primary school students were 40.1％,1.2％ and 4.0％,respectively.Most S.aureus isolates were resistant to penicillin,erythromycin and clindamycin.The dominant multidrug resistance patterns of MDRSA isolates were resistant to erythromycin-clindamycin-tetracycline and erythromycin-clindamycin-cefoxitin.Multifactor dimensionality reduction analysis showed that the rate of resistance to cefoxitin,tetracycline and chloromycetin among MDRSA was 104.39 times as much as that of nonMDRSA.Conclusions The carriage rate of S.aureus in healthy primary school students from Guangzhou was high and these isolates showed multidrug resistance.These data provide basis for guiding the rational use of antibiotics.