Objective To investigate the clinical characteristics and drug sensitivity of patients with Gram-negative bacilli infection, and evaluate the risk factors related to infection, so as to provide a theoretical basis for clinical prevention and treatment of hospital-acquired infection. Methods The complete medical records of 181 patients with Gram-negative bacilli infection in the Department of Respiratory and Critical Care Medicine of Beijing Anzhen Hospital from January 2018 to September 2021 were retrospectively collected. They were divided into a Carbapenem-resistant Gram-negative bacillus (CR-GNB) group and a Carbapenem-sensitive Gram-negative bacillus (CS-GNB) group according to their different sensitivities to carbapenems. Results A total of 238 strains of Gram-negative bacilli were detected, including 108 strains of CR-GNB and 130 strains of CS-GNB. Acinetobacter baumannii was the most common, followed by Pseudomonas aeruginosa, Klebsiella pneumoniae, Enterobacter cloacae, Escherichia coli and Serratia marcescens. Univariate analysis showed that the risk factors of CR-GNB infection were heart disease and cerebrovascular disease, receiving invasive mechanical ventilation, deep venous catheterization and indwelling catheter, hypoproteinemia, renal insufficiency, pre-infection exposure to tigecycline, carbapenems, vancomycin, polymyxin, and combined use of antibiotics. Hypoproteinemia and deep venous catheterization were independent risk factors for CR-GNB infection. The resistance rates of CR-GNB to cefepime, ceftazidime, levofloxacin and ciprofloxacin were 88.0%, 88.0%, 86.1% and 75.0%, respectively. The resistance rate to cefuroxime, amika, ceftriaxone, gentamicin and cotrimoxazole was low, and the resistance rate to ceftazidime avibactam was the lowest (3.7%). Except tetracycline, tigecycline, cefuroxime, polymyxin, cefazolin and ampicillin, the drug resistance rates of CR-GNB group to other antibacterial drugs were higher than those of CS-GNB group, and the differences were statistically significant (P<0.05). The all-cause mortality in CR-GNB group (42.4%) was significantly higher than that in CS-GNB group (6.3%), and the difference was statistically significant (P<0.05). Conclusions The disease burden caused by CR-GNB infection is becoming heavier and heavier, which has a serious impact on the prognosis of hospitalized patients. The increase of antibiotic resistance leads to poor efficacy of antimicrobial therapy. Therefore, early identification of high-risk groups of infection and reasonable and prudent application of antimicrobial therapy can achieve the purpose of reducing the mortality of infection and improving the prognosis of hospitalized patients.
Objective To explore the prevention and control effect of carbapenem resistant Gram-negative bacillus (CRO) in geriatric ward based on transparent supervision model. Methods Patients admitted to the geriatric ward in the First People’s Hospital of Lianyungang between January 2018 and December 2022 were selected. A transparent regulatory model for CRO was established and implemented in 2019, including the establishment of a regulatory group, the development of cluster prevention and control measures, the implementation of transparent reminder, publicity, supervision and assessment and other management measures. We evaluated the effectiveness by comparing the detection rate and infection rate of CRO before and after the intervention. Results A total of 15015 patients were monitored, and a total of 418 strains of CRO were detected. The incidence rate of noso-comial infection was decreasing year by year（χ2=26.666, P<0.001), and the etiological submission rate of hospitalized patients before antimicrobial treatment had been increasing year by year（χ2=280.320, P<0.001). The detection rate of CRO infection had been decreasing year by year, but the difference was not statistically significant (P>0.05), and there was statistical significance in the detection rate of carbapenem-resistant Klebsiella pneumonia infection (P=0.030). The detection rate of CRO had been decreasing year by year (χ2=33.593, P<0.001), and there was statistical significance in the detection rate of carbapenem-resistant Klebsiella pneumonia (χ2=23.663, P<0.001) and carbapenem resistant Pseudomonas aeruginosa (χ2=14.527, P=0.006).Conclusions By establishing and promoting transparent supervision mode in the geriatric ward, the detection rate and infection rate of drug-resistant bacteria can be significantly reduced, and the prevention and control effect of CRO in the elderly patients in the ward can be effectively improved to ensure the safety of elderly patients.