Objective To investigate the current situation and related risk factors of healthcare-associated infection (HAI),so as to provide evidence for making prevention and control measures of HAI.Methods On November 26, 2014,a combination method of bedside visiting and medical record reviewing was adopted to survey HAI status, pathogen examination,and antimicrobial application in all hospitalized patients in a tertiary first class military hospi-tal.Results A total of 1 657 hospitalized patients were investigated,66 patients developed 71 times of HAI,HAI rate and HAI case rate were 3.98% and 4.28% respectively.The top 4 departments with HAI prevalence rates were departments of neurosurgery (24.49%),hematology(19.05%),cadre ward(13.73%),and burn surgery (10.91 %).The top 5 HAI sites were lower respiratory tract (40.85%),urinary tract(23.94%),upper respirato-ry tract(12.68%),surgical site(9.86%),and gastrointestinal tract(5.63%).Of 66 cases of HAI,39 (59.09%) patients sent specimens for culture,a total of 48 pathogens were cultured,the major isolated bacteria was Esche-richia coli (n = 10,20.84%),followed by Staphylococcus aureus ,Klebsiella pneumoniae ,and Pseudomonas aeruginosa ,each was 7 (14.58 %)respectively.The usage rate of antimicrobial agents was 34.40%,specimen de-tection rate in patients receiving therapeutic and therapeutic+prophylactic antimicrobial agents was 59.28%.Risk factors for HAI were age <2 years old or >60 years,with respirator,tracheotomy,urinary tract catheterization, arteriovenous catheterization,hemodialysis,and surgery,difference was significant(all P <0.05).Conclusion Mo-nitoring on key departments and key sites of HAI should be strengthened,antimicrobial agents should be used rationally based on pathogenic detection results,specimen pathogenic detection rate should be improved,and effective prevention and control measures needs to be taken according to the risk factors of HAI.

Objective: To analyze the association of the genetic variations of rs2383206 and rs2383207 in 9p21 region with the coronary heart disease (CHD) in the Chinese Han population, and to explore whether chromosome 9p21 is a susceptibility region for CHD. Methods: Case-control study was conducted. A total of 580 CHD patients were selected as case group, and 539 cases of non-cardiovascular disease patients or normal people with matched age and sex were selected as control group. The rs2383206 and rs2383207 loci of the subjects were genotyped with Sequenom Mass ARRAY time of flight mass spectrometer (TOF). Results: The smoking, waist-to-hip ratio (WHR), hypertension, diabetes mellitus, systolic blood pressure (SBP), diastolic blood pressure (DBP) and total cholesterol (TC of the subjects in two groups were statistically different (P<0. 05). Compared with control group, the ratios of patients with smoking, hypertension and diabetes mellitus of the patients in case group were increased (P< 0. 05); the WHR, SBP, DBP and TC level were also increased (P<0. 05). There was no significant difference in the genotypic distribution of rs2383206 between case group and control group (X2 =4. 623, P>0. 05), while the genotypic distribution of rs2383207 was statistically different (X2 =8. 936, P<0. 05); the distribution frequency of AA genotype in case group (8. 3%) was significantly lower than that in control group (13.6%) (P<0. 05). Conclusion: Smoking, WHR, hypertension, diabetes mellitus, SBP, DBP and TC may be the risk factors for CHD; the AA genotype of 9p21 rs2383207 loci may be the protective genotype of CHD.