Objective To explore the risk factors of mortality in neonates with severe bacterial pneumonia. Method The clinical data of 249 neonates with severe bacterial pneumonia from January 2011 to November 2015 were analyzed retrospectively, and the related factors of mortality were analyzed. Results Of the 249 children, 45 died and mortality rate was 18.07%. A total of 251 strains of pathogenic bacteria were detected in the bacterial culture, and the top 5 pathogens were Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, Streptococcus pneumoniae and Staphylococcus epidermidis. Univariate analysis showed that the gestational age, premature rupture of membranes, age at the time of hospital admission, birth weight, feeding, Apgar score, total bilirubin, complications, traumatic treatment, parenteral nutrition, and multidrug-resistant bacteria infection between the death group and survival group were significantly different (all P<0.05). Multivariate logistic regression analysis showed that the age at admission <7 days (OR=4.30, 95%CI: 1.74～10.64), Apgar scores <7 (OR=3.24, 95%CI: 1.23～8.49), and having complications (OR=6.81, 95%CI: 2.65～17.46), multidrug-resistant bacteria infection (OR=6.16, 95%CI: 1.90～19.99) and traumatic therapy (OR=3.82, 95%CI: 1.03～14.16) were the independent risk factors of mortality in neonatal severe bacterial pneumonia (all P <0.05). Conclusion The mortality rate of neonatal severe bacterial pneumonia is relatively high. And the main risk factors of death were the age at admission <7 days, Apgar scores <7, and having complications, multidrug- resistant bacteria infection and traumatic therapy.

Objective To analyze the influencing factors for fungal infection in hospitalized patients with acquired immunodeficiency syndrome(AIDS),and provide basis for taking preventive and control measures.Methods Clini-cal data of 112 inpatients with AIDS in a tertiary first-class hospital from January 2010 to October 2015 were ana-lyzed retrospectively,related risk factors were analyzed in patients with fungal infection,univariate analysis was performed byχ2 or t test,and multivariate analysis was performed by logistic regression analysis.Results Among 112 AIDS inpatients,41 (36.61%)had fungal infection.Candida albicans was the main pathogen (n=52, 76.74%)and was mainly isolated from lower respiratory tract (n=29,42.65%).Univariate analysis showed that invasive procedures,duration of antimicrobial use,combined antimicrobial use,and decreased CD4+ T lymphocyte count in peripheral blood were risk factors for fungal infection in AIDS inpatients(all P<0.05),while oral cleaning care and systemic antiviral therapy were protective factors for fungal infection(all P<0.05);multivariate analysis showed that decreased CD4+ T lymphocyte count in peripheral blood(OR,1.017[95% CI,1.009-1.025])and combined antimicrobial use(OR,3.975[95%CI,1.093-14.448])were independent risk factors for fungal infection in AIDS inpatients,while systemic antiviral therapy was independent protective factor for fungal infection (OR, 0.288[95%CI,0.099-0.841]).Conclusion There are many factors influencing fungal infection in AIDS patients, rational use of antimicrobial agents,systemic antiviral therapy,and increasing serum albumin concentration are main methods to prevent fungal infection,avoid unnecessary invasive procedures and application of preventive antifungal therapy for high-risk patients are also effective to prevent fungal infection.

Objective To analyze the risk factors for healthcare-associated pneumonia (HAP) in patients with orthopedic injury,provide the basis for making prevention and control measures.Methods HAP occurred in patients with orthopedic injury and admitted to the department of orthopedics of a hospital from June 2011 to May 2015 were investigated retrospectively,risk factors were analyzed by univariate and multivariate logistic regression methods.Results A total of 2 578 patients with orthopedic injury were investigated,92 patients developed HAI,incidence of HAP was 3.57％.107 strains of pathogens were detected,the major were Klebsiella pneumoniae (n =22,20.56％),Escherichia coli (n =14,13.08％),and Acinetobacter baumannii (n =13,12.15％).Risk factors for HAP in patients with orthopedic injury were length of hospital stay≥15 days,smoking history≥3 years,bedridden ≥7 days,associated with underlying diseases,complications,indwelling catheter≥7 days,surgical operation,mechanical ventilation,admitted to intensive care unit,open injury,blood sugar≥11 mmol/L,plasma albumin＜30 g/ L,hemoglobin concentration＜90 g/L,and use of glucocorticoid≥4 days (all P＜0.05).Multivariate logistic regression analysis showed that smoking,bedridden,surgery,mechanical ventilation,glucocorticoid use,and anaemia were independent risk factors for HAP in patients with orthopedic injury.Conclusion The occurrence of HAP in patients with orthopedic injury is related with multiple factors,the major are surgical operation,mechanical ventilation,glucocorticoid use,long term smoking,bedridden,and anaemia.

Objective To analyze risk factors of multiple drug-resistant infections in neonatal intensive care unit (NICU). Methods The clinical data from 284 hospitalized pediatric patients were retrospectively analyzed from June 2011 to July 2015 . The differences between 59 cases with multiple drug-resistant infections and 225 cases with non-multiple drug-resistant infections were compared and analyzed by logistic regression. Results All of 284 cases were single birth. Fifty-nine cases ( 13 . 13 ± 9 . 03 days old) had multiple drug-resistant infections, in which 42 were males and 17 were females. Two hundred and twenty-ifve cases ( 14 . 21 ± 8 . 34 days old) had non-multiple drug-resistant infections, in which 175 cases of males and 50 cases of females. Single factor analysis showed that 8 factors, including gestational age, birth weight, days in hospital, Apgar score at birth, mechanical ventilation, parenteral nutrition, and the categories and duration of use of antimicrobial agents, were the risk factors of multiple drug-resistant infections (P?

Objective To analyze the risk factors of multiple drug resistant bacterial infections in patients with chronic obstructive pulmonary disease (COPD), and provide guidance for disease control and prevention. Methods Clinical data of 814 COPD patients were retrospectively analyzed from June 2011 to May 2015, including patient's age, gender, smoking history, age of onset, severity, aggravated frequency, duration of exacerbations, diabetes mellitus, complications, use frequency and use duration of glucocorticoid, use frequency of antimicrobial agents and use duration of each time, types of antimicrobial drugs used, combined with antibacterial drugs, plasma albumin concentration, blood glucose, bacteria culture detection of multi drug resistant bacteria infection. The risk factors of multi drug resistant bacteria infection were analyzed. Results A total of 857 pathogenic bacteria were isolated from 814 COPD patients with pulmonary infection. Multiple drug resistant bacteria infection were detected in 170 cases, and 175 strains (20.42%) were detected. The detection rate of multi drug resistant/PAN resistant pseudomonas aeruginosa (MDR/PDR-PA) was 55.38% (36/65). There were significant differences in patients with multi drug resistant bacteria infection between different clinical pathological characteristics. Logistic regression analysis showed that the acute exacerbation duration (days), long time use of antimicrobial drugs, and high frequency of corticosteroids and antibiotics use were independent risk factor of multi drug resistant bacteria infection in COPD patients. Conclusion Prevention and treatment of multiple drug resistant bacteria infection in COPD patients should pay attention to the combination of community and hospital, and take effective measures to prevent and control the risk factors.

Objective To discuss pathogens findings in children with severe pneumonia.Methods Bacteria was detected by using sputum culture and blood culture in sterile culture media.Viruses and atypical pathogenic antibodies were detected by using indirect immunofluorescence.Influenza A (H1N1) virus RNA were tested using RT-PCR.According to the results of bacterial culture and drug sensitive test,we can guide the use of antibiotics,and individualize treatment was carried out,including anti-inflammatory,organ function support.Results Bacteria was found in 69 children by using sputum culture.Gram negative bacteria accounted for 57.47％.Gram positive bacteria accounted for 42.53％.Escherichia coli(14.94％),Haemophilus influenzae (20.96％) and klebsiella pneumoniae(13.79％) were the main strains of Gram negative bacteria,Staphylococcus aureus (21.84％)and Streptococcus pneumonia(16.1％)were the main strains of Gram positive bacteria.Bacteria was found in 7 (8.00％) children by using blood culture.Virus were identified in 11 out of 123 patients,including 2 cases of respiratory syncytial virus antibody positive,2 cases of adenovirus antibodies positive,4 cases of influenza B virus antibody positive,2 cases of parainfluenza virus antibody positive and influenza A(H1N1) virus from only one case,Mycoplasma pneumonia agents were identified in 8 patients.Eighty-nine children (72.36％) complicated with sepsis,85 children (69.11％) with respiratory failure,48 children (39.02％) with gastrointestinal dysfunction,32 children (26.02％) with heart failure,18 children(14.63％) with septic shock,13 cases (10.57％) with toxic encephalopathy,5 children (4.07％) with disseminated intravascular coagulation.Among them,17 children (13.82％) complicated with multiple organ dysfunction syndrome.In the 123 children with severe pneumonia,46 cases (37.4％) were cured,73 cases (59.35％) improved,and 4 cases died (3.25％) with critical multiple organ dysfunction syndrome.Conclusion The detection rate of pathogen is high in this study.We should pay more attention to individualize therapy for complication,so that the cure rate could be increased.

Objective To study the brain protection of sequential double-sided antegrade cerebral perfusion to central nervous system in arotie arch surgery. Methods 24 patients received aortic arch replacement under deep hyperthermic circulatory arrest (DHCA) ,with fight-sided, and following double-sided, and left-sided,if necessary, antagrade cerebral perfnsion through right axillary arterial cannula or right femoral arterial eannula homeochronously. Post-operation recovery and the central nervous complications (CNC) were recorded and analyzed. Results 2 cases died, one of whom died of refractory low cardiac output syndrome and the other died of late massive gastrointestinal tract hemorrhage. No patient suffered severe CNC. Conclusion Sequential double-sided antegrade cerebral perfusion combined with DHCA can provide good brain protection in arotic arch replacement.

Objective To analyze the distribution and antimicrobial resistance of pathogenic strains in wound infec-tion,and provide scientific evidence for rational use of antimicrobial agents in treatment of wound infection as well as reducing the emergence of drug-resistant organisms.Methods Data about pathogenic strains isolated from wound specimens of patients with wound infection in a hospital between June 2011 and April 2014 were analyzed retrospectively.Results A total of 965 pathogenic strains were isolated from wound specimens,the main infection sites were limbs(50.47%);infected patients mainly distributed in department of orthopaedic surgery(44.97%);trauma and incisional wound infection were the major infection types(47.98%,36.48%,respectively).Among iso-lated pathogens,gram-positive bacteria,gram-negative bacteria,and fungi accounted for 37.20%,59.59%,and 3.21 % respectively.The main gram-positive bacteria were highly susceptible to vancomycin,teicoplanin,and linezolid,the main gram-negative bacteria were highly resistant to most commonly used antimicrobial agents except cefoperazone/sulbactam,piperacillin/ tazobactam,imipenem,and meropenem.Conclusion Patients with wound infection are mainly distributed in department of orthopedics,the main infection types are trauma and surgical site infection,antimicrobial resistant rates of the major gram-positive and gram-negative bacteria are both high.Sur-geons,especially orthopedics surgeons,should pay attention to the culture of pathogens and monitoring of antimi-crobial susceptibility,use antimicrobial agents rationally,and strengthen the prevention and control of surgical site infection,so as to reduce the infection incidence and occurrence of drug-resistant organisms.

Objective To investigate the genotyping characteristics of Han and Uygur patients with hepatitis C virus(HCV) in Urumqi and other area of Xinjiang ,and provide information for diagnosis and treatment .Methods Totally 380 samples of Han and Uygur patients virus load were detected by real - time PCR ,with the load greater than 1 × 103 copies/mL ,HCV genotyping was carried out by PCR - reverse dot blot hybridization .Results A total of 355 samples(93 .4% ) was genotyped successful .Type 1b of Han and Uygun were 59 .91% ,69 .92% ,type 2a were 30 .17% ,12 .20% ,type 3a were 5 .60% ,8 .13% and type 3b were 3 .88% , 8 .94% .In Urumqi and other areas ,significant difference of patient distribution ,male and female were found between Han and Uygur patients(all P< 0 .05) ,In Urumqi ,type 2a had significant difference between Uygur and Han male patients ,type 1b ,3b had significant difference in female patients(P< 0 .05) .In other areas except Urumqi ,type 2a had significant difference between Uygur and Han man(P< 0 .05) ,other genotypes were not found difference(P> 0 .05) .Conclusion HCV genotyping of Uygur and Han patients in Xinjiang is different with the majority areas in China ,type 1b and 2a are the main infectious virus in Han ,and type 1b is the main infectious virus in Uygur ,followed by type 2a ,3a ,3b .

Objective To investigate the clinical features and risk factors of multidrug－resistant bacteria (multi drug resistant organisms, MDROs) infection in Department of Neurosurgery, and to provide evidence for the prevention and control of MDRO infection. Methods Data from 437 cases of infection in hospitalized patients on January 2012－2016 year in December Third Affiliated Hospital of Guizhou Medical University were retrospectively analyzed. Patients were divided into MDROs group and non MDROs group based on the results of MDROs detection. Multi factor Logistic regression analysis model was used to analyze risk factors. Results The infection rate of MDROs was 35.51%, and the detection rate of MDROs was 33.23% . ESBLs, CR－AB and MRSA were the most common bacterial species, and the infection of respiratory tract, urinary tract and wound infection were the main infection sites. Multivariate logistic regression analysis showed that hospitalization time ＞20 d, level of consciousness (coma), occupancy of ICU ≥7 d, ventilation (invasive), number of antibiotics used≥3, combined use of antibiotics≥3, mechanical ventilation Time≥7 d were possible risk factors for MDROs infection in neurosurgical patients (P＜0.05). Conclusion The situation of MDROs infection in neurosurgery is severe. To reduce MDROs infection, it is important to shorten unnecessary hospitalization time, promptly assess and transfer out of ICU as soon as possible, improve microbial examination, avoid frequent change of antibiotics or unnecessary use of use of broad－spectrum antibiotics, reduce unnecessary mechanical ventilation time, change to non－invasive ventilation as far as possible when the condition permits, focus on patients with poor consciousness, and prevent aspiration by mistake.