Objective: To investigate the associations between childhood obesity and performance of six minute walk test (6MWT), providing evidence for exercise tolerance assessment and exercise intervention strategies for children and adolescents. Methods: From March 2021 to December 2023, a cohort study was conducted among students recruited from a primary and secondary school in Chongqing, a total of 709 valid samples were included. The 6MWT was used to assess exercise tolerance, with vital signs measured before and after the test. Anthropometric indicators, including height, weight, and waist circumference, were measured using standardized procedures. Generalized additive models (GAM) and restricted cubic spline (RCS) regression were employed to analyze the nonlinear relationships between obesity related indicators and six minute walk distance (6MWD). Results: The mean 6MWD of participants was (602.59±70.73)m. GAM showed that after adjusting for confounding factors, body mass index (BMI) and weight had non linear relationships with 6MWD [effective degrees of freedom were 1.55 and 7.13 respectively], and overweight/obesity was associated with a decrease in 6MWD ( β =-18.65) (all P <0.01). Further RCS regression analysis showed that both BMI and weight showed an "inverted U shaped" non linear relationship with 6MWD in the overall population and sex stratified subgroups; the 6MWD of females was lower than that of males, and it showed a significant downward trend with the increase of BMI or weight (all P <0.05). Conclusion Body weight and BMI in children and adolescents have an important impact on 6MWD, and obesity in children and adolescents is markedly associated with decline in exercise tolerance.

This paper summarizes Professor WANG Xixing's clinical experience in treating immune checkpoint inhibitor-related pneumonitis （CIP） based on the theory of "cough attributed to the five zang （脏） organs". Cough is a common predominant symptom of CIP. According to the theory of "cough attributed to the five zang organs"， drug toxicity triggers cancer toxin， leading to disharmony among the five zang organs， and then lung failing to diffuse and govern descent as the core pathogenesis. Therefore， treatment should focus on harmonizing the five zang organs to restore the normal function of lung qi to diffuse and govern descent. In clinical practice， CIP can be classified into four syndrome patterns， including lung yin depletion， deficiency of both the lung and the spleen with phlegm-dampness， liver fire harassing the lung， and lung-kidney yin deficiency. Correspondingly， Chaimai Jinluo Runfei Decoction （柴麦金络润肺汤） is used to nourish yin and moisten the lung； Qigui Peitu Huayin Decoction （芪桂培土化饮汤） is used to fortify the spleen and tonify the lung， resolve dampness and dispel phlegm； Chaidan Shuyu Runjin Decoction （柴丹疏郁润金汤） is used to drain liver and clear the lung； and Dimai Jinshui Xiangsheng Decoction （地脉金水相生汤） is used to nourish the kidney and moisten the lung.

AIM:To investigate whether direct stimulation of the Du Meridian improves autism-like behaviors in mice by modulating synaptic pruning.METHODS:Pregnant mice received intraperitoneal injections of valproic acid(VPA)or saline on gestational day 12.5.Offspring from saline-treated mice were assigned to the saline group.Offspring from VPA-treated mice were randomly divided into the model(VPA)group and the VPA-model-DuMaiTuiFa(VPA-DMTF)group.Each group included five mice.The VPA-DMTF group received direct stimulation along the Du Mai at 80 times per minute,10 minutes per session,twice daily for 21 days.After treatment,behavioral tests were conducted,in-cluding the three-chamber test for social interaction and the open field test for anxiety-like behavior.Hippocampal tissue was collected for analysis.Golgi staining was used to assess dendritic spine density.Immunofluorescence staining for post-synaptic denisty protein(PSD95)and synapsin 1(SYN1)was performed to evaluate synaptic protein expression.Staining for ionized calcium-binding adapter molecule 1(IBA1)and CD68 was used to assess microglial phagocytosis.Western blot analysis was conducted to evaluate hippocampal expression levels of PSD95,SYN1,IBA1,complement component 1,q subcomponent(C1q),complement component 3(C3),and complement receptor 3(CR3).RESULTS:Compared with the saline group,VPA mice showed reduced social behavior and increased anxiety(P<0.05).The expression levels of IBA1,PSD95,and SYN1 were significantly increased(P<0.05),whereas C1q,C3,and CR3 were significantly de-creased(P<0.05).Microglial phagocytosis declined.Immunofluorescence analysis showed increased levels of synaptic proteins(PSD95 and SYN1)in the VPA group(P<0.05).Golgi staining revealed a higher dendritic spine density and an increased proportion of immature dendritic spines(P<0.05).Compared with the VPA group,VPA-DMTF mice showed improved behavior,reduced IBA1,PSD95,and SYN1 levels(P<0.05),and increased expression of C1q,C3,and CR3(P<0.05).Microglial phagocytosis was enhanced,and dendritic spine number was reduced.CONCLUSION:Direct stimulation of the Du Mai alleviates autism-like behaviors in mice.This effect may be mediated by upregulation of comple-ment proteins C1q and C3,which enhance microglia-mediated synaptic pruning and reduce synaptic overabundance.

Objective To examine the changing prevalence and antimicrobial resistance profiles of Burkholderia cepacia in 52 hospitals across China from 2015 to 2021.Methods A total of 9 261 strains of B.cepacia were collected from 52 hospitals between January 1,2015 and December 31,2021.Antimicrobial susceptibility of the strains was tested using Kirby-Bauer method or automated antimicrobial susceptibility testing systems according to a unified protocol.The results were interpreted according to the breakpoints released in the Clinical & Laboratory Standards Institute(CLSI)guidelines(2023 edition).Results A total of 9 261 strains of B.cepacia were isolated from all age groups,especially elderly patients.The proportion was 11.1％(1 032 strains)in children,significantly lower than the proportion in adults.About half(46.5％,4 310/9 261)of the strains were isolated from patients at least 60 years old and 42.3％(3 919/9 261)of the strains were isolated from young adults.Most isolates(71.1％)were isolated from sputum and respiratory secretions,followed by urine(10.7％)and blood samples(8.1％).B.cepacia isolates were highly susceptible to the five antimicrobial agents recommended in the CLSI M100 document(33rd edition,2023).B.cepacia isolates showed relatively higher resistance rates to meropenem and levofloxacin.However,the resistance rates to ceftazidime,trimethoprim-sulfamethoxazole,and minocycline remained below 8.1％.The percentage of B.cepacia strains resistant to levofloxacin was the highest compared to other antibiotics in any of the three age groups(from 12.4％in the patients＜18 years old to 20.6％in the patients aged 60 years or older).Conclusions B.cepacia is one of the clinically important non-fermenting gram-negative bacteria.Accurate and timely reporting of antimicrobial susceptibility test results and ongoing antimicrobial resistance surveillance are helpful for rational prescription of antimicrobial agents and proper prevention and control of nosocomial infections.

Surgical site infection(SSI)is a significant type of hospital-associated infection,with varying incidence rates across different regions and surgical procedures.SSI not only increases the burden on the healthcare system but also poses serious threats to patient safety and quality of life.China has established a multi-level and multi-di-mensional management framework,including laws,industry standards and guidelines,to regulate prevention and control behaviors through various documents such as the"Measures for the Management of Hospital-associated In-fection"and the"Technical Guidelines for the Prevention and Control of Surgical Site Infection".In recent years,with the development of international and domestic cooperation,the formulation of professional guidelines and consensuses and the implementation of evidence-based research,China has achieved certain results in SSI preven-tion and control.However,problems such as differences in awareness and implementation across regions,inade-quate data sharing and integration and lack of long-term follow-up still exist.In the future,it is necessary to create an AI-assisted personalized prevention and control model,establish an interdisciplinary collaborative prevention and control system and promote the implementation of administrative management and professionalization to con-tinuously optimize the SSI prevention and control system and improve medical quality and patient safety.

Objective To investigate the distribution and antimicrobial resistance profiles of common pathogens isolated from cerebrospinal fluid(CSF)in CHINET program from 2015 to 2021.Methods The bacterial strains isolated from CSF were identified in accordance with clinical microbiology practice standards.Antimicrobial susceptibility test was conducted using Kirby-Bauer method and automated systems per the unified CHINET protocol.Results A total of 14 014 bacterial strains were isolated from CSF samples from 2015 to 2021,including the strains isolated from inpatients(95.3％)and from outpatient and emergency care patients(4.7％).Overall,19.6％of the isolates were from children and 80.4％were from adults.Gram-positive and Gram-negative bacteria accounted for 68.0％and 32.0％,respectively.Coagulase negative Staphylococcus accounted for 73.0％of the total Gram-positive bacterial isolates.The prevalence of MRSA was 38.2％in children and 45.6％in adults.The prevalence of MRCNS was 67.6％in adults and 69.5％in children.A small number of vancomycin-resistant Enterococcus faecium(2.2％)and linezolid-resistant Enterococcus faecalis(3.1％)were isolated from adult patients.The resistance rates of Escherichia coli and Klebsiella pneumoniae to ceftriaxone were 52.2％and 76.4％in children,70.5％and 63.5％in adults.The prevalence of carbapenem-resistant E.coli and K.pneumoniae(CRKP)was 1.3％and 47.7％in children,6.4％and 47.9％in adults.The prevalence of carbapenem-resistant Acinetobacter baumannii(CRAB)and Pseudomonas aeruginosa(CRPA)was 74.0％and 37.1％in children,81.7％and 39.9％in adults.Conclusions The data derived from antimicrobial resistance surveillance are crucial for clinicians to make evidence-based decisions regarding antibiotic therapy.Attention should be paid to the Gram-negative bacteria,especially CRKP and CRAB in central nervous system(CNS)infections.Ongoing antimicrobial resistance surveillance is helpful for optimizing antibiotic use in CNS infections.

Objective To investigate the antimicrobial resistance of clinical isolates from elderly patients(≥65 years)in major medical institutions across China.Methods Bacterial strains were isolated from elderly patients in 52 hospitals participating in the CHINET Antimicrobial Resistance Surveillance Program during the period from 2015 to 2021.Antimicrobial susceptibility test was carried out by disk diffusion method and automated systems according to the same CHINET protocol.The data were interpreted in accordance with the breakpoints recommended by the Clinical and Laboratory Standards Institute(CLSI)in 2021.Results A total of 514 715 nonduplicate clinical isolates were collected from elderly patients in 52 hospitals from January 1,2015 to December 31,2021.The number of isolates accounted for 34.3％of the total number of clinical isolates from all patients.Overall,21.8％of the 514 715 strains were gram-positive bacteria,and 78.2％were gram-negative bacteria.Majority(90.9％)of the strains were isolated from inpatients.About 42.9％of the strains were isolated from respiratory specimens,and 22.9％were isolated from urine.More than half(60.7％)of the strains were isolated from male patients,and 39.3％isolated from females.About 51.1％of the strains were isolated from patients aged 65-＜75 years.The prevalence of methicillin-resistant strains(MRSA)was 38.8％in 32 190 strains of Staphylococcus aureus.No vancomycin-or linezolid-resistant strains were found.The resistance rate of E.faecalis to most antibiotics was significantly lower than that of Enterococcus faecium,but a few vancomycin-resistant strains(0.2％,1.5％)and linezolid-resistant strains(3.4％,0.3％)were found in E.faecalis and E.faecium.The prevalence of penicillin-susceptible S.pneumoniae(PSSP),penicillin-intermediate S.pneumoniae(PISP),and penicillin-resistant S.pneumoniae(PRSP)was 94.3％,4.0％,and 1.7％in nonmeningitis S.pneumoniae isolates.The resistance rates of Klebsiella spp.(Klebsiella pneumoniae 93.2％)to imipenem and meropenem were 20.9％and 22.3％,respectively.Other Enterobacterales species were highly sensitive to carbapenem antibiotics.Only 1.7％-7.8％of other Enterobacterales strains were resistant to carbapenems.The resistance rates of Acinetobacter spp.(Acinetobacter baumannii 90.6％)to imipenem and meropenem were 68.4％and 70.6％respectively,while 28.5％and 24.3％of P.aeruginosa strains were resistant to imipenem and meropenem,respectively.Conclusions The number of clinical isolates from elderly patients is increasing year by year,especially in the 65-＜75 age group.Respiratory tract isolates were more prevalent in male elderly patients,and urinary tract isolates were more prevalent in female elderly patients.Klebsiella isolates were increasingly resistant to multiple antimicrobial agents,especially carbapenems.Antimicrobial resistance surveillance is helpful for accurate empirical antimicrobial therapy in elderly patients.

AIM:To investigate whether direct stimulation of the Du Meridian improves autism-like behaviors in mice by modulating synaptic pruning.METHODS:Pregnant mice received intraperitoneal injections of valproic acid(VPA)or saline on gestational day 12.5.Offspring from saline-treated mice were assigned to the saline group.Offspring from VPA-treated mice were randomly divided into the model(VPA)group and the VPA-model-DuMaiTuiFa(VPA-DMTF)group.Each group included five mice.The VPA-DMTF group received direct stimulation along the Du Mai at 80 times per minute,10 minutes per session,twice daily for 21 days.After treatment,behavioral tests were conducted,in-cluding the three-chamber test for social interaction and the open field test for anxiety-like behavior.Hippocampal tissue was collected for analysis.Golgi staining was used to assess dendritic spine density.Immunofluorescence staining for post-synaptic denisty protein(PSD95)and synapsin 1(SYN1)was performed to evaluate synaptic protein expression.Staining for ionized calcium-binding adapter molecule 1(IBA1)and CD68 was used to assess microglial phagocytosis.Western blot analysis was conducted to evaluate hippocampal expression levels of PSD95,SYN1,IBA1,complement component 1,q subcomponent(C1q),complement component 3(C3),and complement receptor 3(CR3).RESULTS:Compared with the saline group,VPA mice showed reduced social behavior and increased anxiety(P<0.05).The expression levels of IBA1,PSD95,and SYN1 were significantly increased(P<0.05),whereas C1q,C3,and CR3 were significantly de-creased(P<0.05).Microglial phagocytosis declined.Immunofluorescence analysis showed increased levels of synaptic proteins(PSD95 and SYN1)in the VPA group(P<0.05).Golgi staining revealed a higher dendritic spine density and an increased proportion of immature dendritic spines(P<0.05).Compared with the VPA group,VPA-DMTF mice showed improved behavior,reduced IBA1,PSD95,and SYN1 levels(P<0.05),and increased expression of C1q,C3,and CR3(P<0.05).Microglial phagocytosis was enhanced,and dendritic spine number was reduced.CONCLUSION:Direct stimulation of the Du Mai alleviates autism-like behaviors in mice.This effect may be mediated by upregulation of comple-ment proteins C1q and C3,which enhance microglia-mediated synaptic pruning and reduce synaptic overabundance.

Objective To examine the changing prevalence and antimicrobial resistance profiles of Burkholderia cepacia in 52 hospitals across China from 2015 to 2021.Methods A total of 9 261 strains of B.cepacia were collected from 52 hospitals between January 1,2015 and December 31,2021.Antimicrobial susceptibility of the strains was tested using Kirby-Bauer method or automated antimicrobial susceptibility testing systems according to a unified protocol.The results were interpreted according to the breakpoints released in the Clinical & Laboratory Standards Institute(CLSI)guidelines(2023 edition).Results A total of 9 261 strains of B.cepacia were isolated from all age groups,especially elderly patients.The proportion was 11.1％(1 032 strains)in children,significantly lower than the proportion in adults.About half(46.5％,4 310/9 261)of the strains were isolated from patients at least 60 years old and 42.3％(3 919/9 261)of the strains were isolated from young adults.Most isolates(71.1％)were isolated from sputum and respiratory secretions,followed by urine(10.7％)and blood samples(8.1％).B.cepacia isolates were highly susceptible to the five antimicrobial agents recommended in the CLSI M100 document(33rd edition,2023).B.cepacia isolates showed relatively higher resistance rates to meropenem and levofloxacin.However,the resistance rates to ceftazidime,trimethoprim-sulfamethoxazole,and minocycline remained below 8.1％.The percentage of B.cepacia strains resistant to levofloxacin was the highest compared to other antibiotics in any of the three age groups(from 12.4％in the patients＜18 years old to 20.6％in the patients aged 60 years or older).Conclusions B.cepacia is one of the clinically important non-fermenting gram-negative bacteria.Accurate and timely reporting of antimicrobial susceptibility test results and ongoing antimicrobial resistance surveillance are helpful for rational prescription of antimicrobial agents and proper prevention and control of nosocomial infections.

Objective To summarize the changing prevalence of carbapenem resistance in Enterobacterales based on the data of CHINET Antimicrobial Resistance Surveillance Program from 2015 to 2021 for improving antimicrobial treatment in clinical practice.Methods Antimicrobial susceptibility testing was performed using a commercial automated susceptibility testing system according to the unified CHINET protocol.The results were interpreted according to the breakpoints of the Clinical & Laboratory Standards Institute(CLSI)M100 31st ed in 2021.Results Over the seven-year period(2015-2021),the overall prevalence of carbapenem-resistant Enterobacterales(CRE)was 9.43％(62 342/661 235).The prevalence of CRE strains in Klebsiella pneumoniae,Citrobacter freundii,and Enterobacter cloacae was 22.38％,9.73％,and 8.47％,respectively.The prevalence of CRE strains in Escherichia coli was 1.99％.A few CRE strains were also identified in Salmonella and Shigella.The CRE strains were mainly isolated from respiratory specimens(44.23±2.80)％,followed by blood(20.88±3.40)％and urine(18.40±3.45)％.Intensive care units(ICUs)were the major source of the CRE strains(27.43±5.20)％.CRE strains were resistant to all the β-lactam antibiotics tested and most non-β-lactam antimicrobial agents.The CRE strains were relatively susceptible to tigecycline and polymyxins with low resistance rates.Conclusions The prevalence of CRE strains was increasing from 2015 to 2021.CRE strains were highly resistant to most of the antibacterial drugs used in clinical practice.Clinicians should prescribe antimicrobial agents rationally.Hospitals should strengthen antibiotic stewardship in key clinical settings such as ICUs,and take effective infection control measures to curb CRE outbreak and epidemic in hospitals.