Objective To understand the current situation of healthcare-associated infection(HAI)in China,pro-vide data support and decision-making basis for formulating scientific and effective strategies for HAI prevention and control.Methods A nationwide cross-sectional survey on HAI was conducted among various types and levels of medical institutions in China according to a unified protocol of bedside surveys and case investigations.Results In 2024,a total of 5 736 medical institutions and 2 751 765 patients were surveyed.Among them,34 889 HAI cases were identified,with a prevalence rate of 1.27％.The number of HAI episodes was 38 032,and case prevalence rate was 1.38％.The prevalence rate of HAI in medical institutions in different regions of China ranged from 0.66％to 2.35％.Among medical institutions of different scales,those with a bed capacity of ≥900 had the high-est incidence of HAI,reaching 1.65％.The most common infection site was the lower respiratory tract(44.66％),followed by the urinary tract(12.94％),surgical site(9.32％),upper respiratory tract(7.02％),and bloodstream infection(5.78％).The top 3 departments with the highest HAI rates were the general intensive care unit(10.02％),department of neurosurgery(5.51％),and department(group)of hematology(5.34％).A total of 23 238 strains of HAI pathogens were detected,with 10 714 strains(46.10％)from lower respiratory tract speci-mens.The top 5 detected strains were Klebsiella pneumoniae(14.76％),Pseudomonas aeruginosa(13.33％),Escherichia coli(12.79％),Acinetobacter baumannii(9.23％),and Staphylococcus aureus(7.88％).231 944 pa-tients underwent class Ⅰ incision surgery were monitored,with 1 647 cases experienced surgical site infection,and the prevalence rate of surgical site infection was 0.71％.The number of patients who should undergo pathogen de-tection(patients receiving therapeutic and therapeutic combined prophylactic antimicrobial agents)was 715 179,while the actual number was 480 492,with a pathogen detection rate of 67.18％.425 225 patients received patho-genic detection before treatment,with a detection rate of 59.46％.Conclusion The overall HAI prevalence in Chi-na is lower,showing disparities among medical institutions of different regions and scales.Therefore,precise imple-mentation of measures is necessary for HAI prevention and control,with a focus on high-risk institutions and high-risk departments,key areas,and critical procedures.All levels of medical institutions should continuously reduce the incidence of HAI by strengthening monitoring,standardizing the use of antimicrobial agents,and reinforcing basic HAI prevention and control measures.

Currently,aging is a major public health topic globally.Infectious diseases exhibit high incidence and mortality among the elderly,which seriously affect the quality of life of the elderly and cause a heavy economic bur-den.The changes of immune function in the elderly are complicated.Their immune response and clinical immune regulation methods after infection need further clarification.This expert consensus summarizes the immune charac-teristics of the elderly and the inherent connection with infections,the application of glucocorticoids,the use of re-lated immune modulators,as well as diagnosis and treatment under specific conditions,providing high-quality recommendations for clinical practice.

The aging trend is intensifying currently,but there is still a lack of standardized diagnosis and treat-ment schemes for severe infections in elderly people.This paper focuses on the recommendations for immune-related clinical diagnosis and treatment routes as well as the idea of risk stratified diagnosis and treatment for elderly peo-ple,aiming to effectively prevent infectious diseases in elderly people and perform stratified management through systematic and scientific means of immune function monitoring and regulation,so as to enhance the standardized level of diagnosis and treatment as well as clinical treatment effect of infection in elderly people.

Objective To investigate the current clinical practices regarding perioperative discontinuation,bridging,and resumption of antiplatelet therapy in coronary heart disease(CHD)patients undergoing elective non-cardiac surgery or procedures,aiming to optimize perioperative antithrombotic management strategies.Methods A retrospective study was conducted on CHD patients requiring long-term oral antiplatelet therapy after percutaneous coronary intervention(PCI)who underwent elective non-cardiac surgery or procedures at a tertiary hospital in Hubei Province from January 1 to June 30,2024.Data on perioperative discontinuation,bridging,and resumption of antithrombotic drugs,as well as in-hospital bleeding events,were analyzed.Results A total of 338 hospitalized patients were included,with males accounting for 79.88%and the majority aged over 60 years.High bleeding-risk procedures comprised 56.61%of cases.Among 171 patients on single antiplatelet therapy(SAPT)preoperatively,8.19%continued therapy without interruption.Of the 157 patients who discontinued SAPT,67.25%received bridging therapy with low molecular weight heparin(LMWH),and 4.68%with sulodexide.Among 167 patients on dual antiplatelet therapy(DAPT)preoperatively,17.37%(29 cases)continued DAPT,while 122 discontinued it,with 85 receiving LMWH bridging.Postoperatively,58.64%(173/295)had not resumed antiplatelet therapy by discharge.Three intraoperative and 17 postoperative bleeding events(predominantly minor)were recorded.Conclusions Current perioperative antithrombotic management strategies for patients on long-term antiplatelet therapy undergoing elective surgery lack standardization,both domestically and internationally.Practices at this institution regarding drug discontinuation,bridging,and resumption diverged from guideline recommendations.However,the low observed bleeding rate and insufficient evidence highlight the need for well-designed clinical studies to address unresolved issues in perioperative antithrombotic management.

Objective To analyze the risk factors of fluconazole resistance in Candida tropicalis(C.tropicalis)urinary tract infection(UTI),and evaluate the efficacy of different treatment regimens.Methods Patients with C.tropicalis UTI at Xiangya Hospital of Central South University from January 2021 to December 2023 were in-cluded for single center retrospective study.The minimum inhibitory concentration(MIC)of fluconazole was deter-mined by microbroth dilution.Patients were divided into a fluconazole-resistant group and a fluconazole-sensitive group based on fluconazole resistance.Risk factors for fluconazole resistance were analyzed based on clinical data,and therapeutic efficacy in patients in fluconazole-resistant group was analyzed.Results A total of 198 patients were included in the study.133(67.2％)C.tropicalis strains were detected to be sensitive to fluconazole,while 65(32.8％)strains were resistant,and 63.1％(n=41)had MIC values ≥128 μg/mL.Compared with fluconazole-sensitive group,fluconazole-resistant group had a higher proportion of pulmonary infection(P=0.019).Pulmonary infection(OR=3.282)was a risk factor for fluconazole resistance in C.tropicalis UTI,while urinary system ob-struction(OR=0.269)was a protective factor for fluconazole resistance in C.tropicalis UTI.There was no statis-tically significant difference in the usage rate of different antimicrobial agent types between the two groups(all P＞0.05).The therapeutic efficacy analysis showed that the effective rates of treatment with fluconazole dosage regi-mens of ≤200 mg/d,≥400 mg/d,and fluconazole monotherapy against fluconazole-resistant strains were 66.7％(6/9),83.3％(5/6),and 100％(6/6),respectively.For patients treated with monotherapy using other drugs or with multidrug sequential treatment regimens,the treatment effective rate was 60.0％(3/5).The proportion of pa-tients in the effective treatment group who removed their urinary catheters after detecting C.tropicalis was higher than that in the ineffective treatment group(P＜0.001).Conclusion The fluconazole resistance of C.tropicalis is related to urinary tract obstruction and concurrent pulmonary infection.When treating UTI caused by fluconazole-resistant strains,the catheter should be removed as early as possible.In addition to increasing the dosage of flucon-azole,other antifungal drugs such as flucytosine alone or sequential treatment with multiple drugs can also be con-sidered.

Objective To investigate the current clinical practices regarding perioperative discontinuation,bridging,and resumption of antiplatelet therapy in coronary heart disease(CHD)patients undergoing elective non-cardiac surgery or procedures,aiming to optimize perioperative antithrombotic management strategies.Methods A retrospective study was conducted on CHD patients requiring long-term oral antiplatelet therapy after percutaneous coronary intervention(PCI)who underwent elective non-cardiac surgery or procedures at a tertiary hospital in Hubei Province from January 1 to June 30,2024.Data on perioperative discontinuation,bridging,and resumption of antithrombotic drugs,as well as in-hospital bleeding events,were analyzed.Results A total of 338 hospitalized patients were included,with males accounting for 79.88%and the majority aged over 60 years.High bleeding-risk procedures comprised 56.61%of cases.Among 171 patients on single antiplatelet therapy(SAPT)preoperatively,8.19%continued therapy without interruption.Of the 157 patients who discontinued SAPT,67.25%received bridging therapy with low molecular weight heparin(LMWH),and 4.68%with sulodexide.Among 167 patients on dual antiplatelet therapy(DAPT)preoperatively,17.37%(29 cases)continued DAPT,while 122 discontinued it,with 85 receiving LMWH bridging.Postoperatively,58.64%(173/295)had not resumed antiplatelet therapy by discharge.Three intraoperative and 17 postoperative bleeding events(predominantly minor)were recorded.Conclusions Current perioperative antithrombotic management strategies for patients on long-term antiplatelet therapy undergoing elective surgery lack standardization,both domestically and internationally.Practices at this institution regarding drug discontinuation,bridging,and resumption diverged from guideline recommendations.However,the low observed bleeding rate and insufficient evidence highlight the need for well-designed clinical studies to address unresolved issues in perioperative antithrombotic management.

Objective To develop a method for rapidly identifying Clostridioides difficile(C.difficile)and de-termining high-producing toxin strains,conduct clinical evaluation.Methods The loop-mediated isothermal amplifi-cation(LAMP)method was used to identify C.difficile based on the tcdC,tcdA,and tcdB genes.The sensitivi-ty,specificity,and overall consistency of the detection method were evaluated.Results Feces specimens from 499 hospitalized patients suspected of C.difficile-associated diarrhea were detected,with C.difficile detection rate of 12.8％(64/499),out of which the detection rate of toxin-producing C.difficile was 10.8％(54/499).The sensi-tivity,specificity,positive predictive value,and negative predictive value of the detection method for tcdA were 87.2％,98.9％,89.1％,and 98.6％,respectively,and 88.2％,99.6％,90.0％,and 98.73％for tcdB,respec-tively.The total toxin levels of different strains were different,but the average toxin production level of A+B+strains(1.79 μg/mL)was higher than those of A-B+strains(0.72 μg/mL)and A-B-strains(＜0.10 μg/mL).Conclusion The portable high-throughput LAMP detection method can rapidly and efficiently identify C.difficile and determine high-producing toxin strains.

Creutzfeldt-Jakob disease(CJD)is a rapidly progressive and fatal neurodegenerative disorder caused by prions,with certain infectivity and iatrogenic transmission risks.With the rapid progress and application of new dia-gnostic biomarkers and detection methods,as well as the construction and improvement of surveillance and reporting systems,the detection of CJD in patients domestically and internationally has shown an increasing trend year by year.Due to its long incubation period and heterogeneity of early symptoms,early identification and diagnosis of the disease is difficult,increasing the risk of transmission within medical institutions.Currently,there is a lack of con-sensus on the infection prevention and control of CJD.In order to timely identify and diagnose CJD as well as effec-tively block its transmission in medical institutions,this consensus summarizes 15 clinical concerns and formulates 24 specific recommendations based on the latest domestic and international research findings and clinical evidence,as well as combines with clinical practice,aiming to standardize healthcare-associated infection prevention and control measures for CJD and reduce its transmission risk in medical institutions.

Objective To analyze the risk factors of fluconazole resistance in Candida tropicalis(C.tropicalis)urinary tract infection(UTI),and evaluate the efficacy of different treatment regimens.Methods Patients with C.tropicalis UTI at Xiangya Hospital of Central South University from January 2021 to December 2023 were in-cluded for single center retrospective study.The minimum inhibitory concentration(MIC)of fluconazole was deter-mined by microbroth dilution.Patients were divided into a fluconazole-resistant group and a fluconazole-sensitive group based on fluconazole resistance.Risk factors for fluconazole resistance were analyzed based on clinical data,and therapeutic efficacy in patients in fluconazole-resistant group was analyzed.Results A total of 198 patients were included in the study.133(67.2％)C.tropicalis strains were detected to be sensitive to fluconazole,while 65(32.8％)strains were resistant,and 63.1％(n=41)had MIC values ≥128 μg/mL.Compared with fluconazole-sensitive group,fluconazole-resistant group had a higher proportion of pulmonary infection(P=0.019).Pulmonary infection(OR=3.282)was a risk factor for fluconazole resistance in C.tropicalis UTI,while urinary system ob-struction(OR=0.269)was a protective factor for fluconazole resistance in C.tropicalis UTI.There was no statis-tically significant difference in the usage rate of different antimicrobial agent types between the two groups(all P＞0.05).The therapeutic efficacy analysis showed that the effective rates of treatment with fluconazole dosage regi-mens of ≤200 mg/d,≥400 mg/d,and fluconazole monotherapy against fluconazole-resistant strains were 66.7％(6/9),83.3％(5/6),and 100％(6/6),respectively.For patients treated with monotherapy using other drugs or with multidrug sequential treatment regimens,the treatment effective rate was 60.0％(3/5).The proportion of pa-tients in the effective treatment group who removed their urinary catheters after detecting C.tropicalis was higher than that in the ineffective treatment group(P＜0.001).Conclusion The fluconazole resistance of C.tropicalis is related to urinary tract obstruction and concurrent pulmonary infection.When treating UTI caused by fluconazole-resistant strains,the catheter should be removed as early as possible.In addition to increasing the dosage of flucon-azole,other antifungal drugs such as flucytosine alone or sequential treatment with multiple drugs can also be con-sidered.

A 70-year-old male patient was admitted to a hospital on March 1,2024 due to"muscle soreness in his extremities for over a month".Diagnosis consideration:polymyalgia rheumatica(with a high likelihood,the possi-bility of a tumor needs to be excluded).The patient was treated with methylprednisolone.After discharge from the hospital,the patient's symptoms worsened due to self-withdrawal of medication(methylprednisolone treatment for 20 days),and developed fever and cough.He then revisited the hospital and was confirmed to have Legionella mar-ssiliensis infection through metagenomic sequencing of bronchoalveolar lavage fluid(nucleic acid of all microorga-nisms were extracted from the specimens and compared in the PMDB database to obtain species information of the suspected pathogenic microorganisms).Subsequently,the patient was treated with a combination of 0.75 g levo-floxacin intravenous infusion qd+0.1 g doxycycline enteric-coated capsules orally bid for anti-infective therapy.The patient's symptoms,such as cough and muscle pain,improved significantly after anti-inflammatory and anti-in-fective treatment,and he was discharged on March 18.As the first reported case of Legionella marssiliensis pulmo-nary infection in China,this case highlights that among the multiple species of Legionella,there is another bacte-rium that can infect the human body and cause disease.This case report is beneficial for improving medical staff's understanding on Legionella marssiliensis and providing reference for the diagnosis and treatment of future cases of Legionella marssiliensis infection.