1.Exploring Mechanism of Anti-atherosclerosis Effect of Huangqi Chifengtang Based on AMPK/PPARα Signaling Pathway and NLRP3 Inflammasome
Yuqin LIANG ; Jie LIU ; Chi ZHANG ; Pingping CHEN ; Fang LU ; Shumin LIU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(1):131-139
ObjectiveTo explore the improving effect of Huangqi Chifengtang(HCT) on atherosclerosis(AS), and elucidate its mechanism in relation to adenosine monophosphate-activated protein kinase(AMPK)/peroxisome proliferator-activated receptor α(PPARα) signaling pathway and nucleotide-binding oligomerization domain(NOD)-like receptor thermal protein domain associated protein 3(NLRP3) inflammasome. MethodsEight C57BL/6J mice were set as the normal group, and 32 ApoE-/- mice were randomly divided into the model group, the positive drug group(atorvastatin, 5 mg·kg-1·d-1), HCT low- and high-dose groups(1.95, 3.90 g·kg-1·d-1). ApoE-/- mice were fed with high-fat and high-cholesterol feed to establish an AS mouse model. After modeling, they were orally administered corresponding dose of drugs for 28 days, while the normal and model groups received an equal volume of physiological saline via oral gavage. Hematoxylin-eosin(HE) staining was used to observe the pathological status of the aorta and liver in mice, Biochemical testing and enzyme-linked immunosorbent assay(ELISA) were used to detect the levels of total cholesterol(TC), triglycerides(TG), low-density lipoprotein cholesterol(LDL-C), alanine aminotransferase(ALT), aspartate aminotransferase(AST), C-reactive protein(CRP), interleukin(IL)-1β, IL-18 in the serum, as well as superoxide dismutase(SOD), malondialdehyde(MDA), and reduced glutathione(GSH) in the liver. Real-time fluorescence quantitative polymerase chain reaction(Real-time PCR) was used to measure the mRNA expression levels of NLRP3, apoptosis-associated speck-like protein(ASC), cysteinyl aspartate specific proteinase-1(Caspase-1), Toll-like receptor 4(TLR4) in the aorta, and fatty acid synthase(FAS), stearoyl-CoA desaturase 1(SCD1), PPARα, and carnitine palmitoyltransferase 1A(CPT1A) in the liver. Immunohistochemistry was used to determine the protein expressions of NLRP3, Caspase-1, and ASC in the aorta, and Western blot was used to measure the protein expressions of AMPK, p-AMPK, sterol regulatory element binding protein-1c(SREBP-1c), CPT1A, and FAS in the liver. ResultsCompared with the normal group, the model group showed a significant increase in lipid plaque deposition in the aorta and lipid accumulation in the liver, the levels of TC, TG, LDL-C, AST, ALT, IL-1β, IL-18 and CRP in the serum were significantly increased(P<0.01), and the mRNA and protein expressions of aortic TLR4, NLRP3, Caspase-1 and ASC were significantly upregulated(P<0.01). The levels of SOD and GSH in the liver were significantly reduced, while the level of MDA was significantly increased(P<0.01). The mRNA expressions of FAS and SCD1 in the liver were significantly downregulated, while the mRNA expressions of PPARα and CPT1A were significantly upregulated. The protein expressions of p-AMPK/AMPK and CPT1A in the liver were significantly reduced, while the expressions of SREBP-1c and FAS proteins were significantly increased(P<0.01). Compared with the model group, the low- and high-dose HCT groups showed significant improvements in aortic plaques and hepatic lipid deposition. The levels of TC, LDL-C, AST, IL-1β and IL-18 in the serum of the low-dose HCT group, as well as TC, TG, LDL-C, AST, ALT, IL-1β, IL-18 and CRP in the serum of the high-dose HCT group, were significantly reduced(P<0.01). The mRNA expressions of TLR4, NLRP3 and Caspase-1 in the aorta of the low-dose HCT group, as well as TLR4, NLRP3, Caspase-1 and ASC in the aorta of the high-dose HCT group, were significantly downregulated(P<0.01). The protein expressions of Caspase-1 and ASC in the aorta of the low-dose HCT group, as well as NLRP3, Caspase-1 and ASC in the high-dose HCT group, were significantly downregulated(P<0.01). The levels of SOD and GSH in the liver of the low- and high-dose HCT groups were significantly increased, while the level of MDA in the high-dose HCT group was significantly decreased(P<0.05, P<0.01). In the HCT-treated group, the mRNA expressions of FAS and SCD1 in the liver were significantly upregulated, while the mRNA expressions of PPARα and CPT1A were significantly downregulated, the protein expressions of p-AMPK/AMPK and CPT1A in the liver were significantly increased, while the protein expressions of SREBP-1c and FAS were significantly decreased(P<0.05, P<0.01). ConclusionHCT can improve lipid metabolism by activating the AMPK/PPARα pathway and inhibit NLRP3 inflammasome-mediated inflammatory responses, thereby reducing hepatic lipid deposition and AS plaque formation.
2.Expert consensus on the diagnosis and treatment of cemental tear.
Ye LIANG ; Hongrui LIU ; Chengjia XIE ; Yang YU ; Jinlong SHAO ; Chunxu LV ; Wenyan KANG ; Fuhua YAN ; Yaping PAN ; Faming CHEN ; Yan XU ; Zuomin WANG ; Yao SUN ; Ang LI ; Lili CHEN ; Qingxian LUAN ; Chuanjiang ZHAO ; Zhengguo CAO ; Yi LIU ; Jiang SUN ; Zhongchen SONG ; Lei ZHAO ; Li LIN ; Peihui DING ; Weilian SUN ; Jun WANG ; Jiang LIN ; Guangxun ZHU ; Qi ZHANG ; Lijun LUO ; Jiayin DENG ; Yihuai PAN ; Jin ZHAO ; Aimei SONG ; Hongmei GUO ; Jin ZHANG ; Pingping CUI ; Song GE ; Rui ZHANG ; Xiuyun REN ; Shengbin HUANG ; Xi WEI ; Lihong QIU ; Jing DENG ; Keqing PAN ; Dandan MA ; Hongyu ZHAO ; Dong CHEN ; Liangjun ZHONG ; Gang DING ; Wu CHEN ; Quanchen XU ; Xiaoyu SUN ; Lingqian DU ; Ling LI ; Yijia WANG ; Xiaoyuan LI ; Qiang CHEN ; Hui WANG ; Zheng ZHANG ; Mengmeng LIU ; Chengfei ZHANG ; Xuedong ZHOU ; Shaohua GE
International Journal of Oral Science 2025;17(1):61-61
Cemental tear is a rare and indetectable condition unless obvious clinical signs present with the involvement of surrounding periodontal and periapical tissues. Due to its clinical manifestations similar to common dental issues, such as vertical root fracture, primary endodontic diseases, and periodontal diseases, as well as the low awareness of cemental tear for clinicians, misdiagnosis often occurs. The critical principle for cemental tear treatment is to remove torn fragments, and overlooking fragments leads to futile therapy, which could deteriorate the conditions of the affected teeth. Therefore, accurate diagnosis and subsequent appropriate interventions are vital for managing cemental tear. Novel diagnostic tools, including cone-beam computed tomography (CBCT), microscopes, and enamel matrix derivatives, have improved early detection and management, enhancing tooth retention. The implementation of standardized diagnostic criteria and treatment protocols, combined with improved clinical awareness among dental professionals, serves to mitigate risks of diagnostic errors and suboptimal therapeutic interventions. This expert consensus reviewed the epidemiology, pathogenesis, potential predisposing factors, clinical manifestations, diagnosis, differential diagnosis, treatment, and prognosis of cemental tear, aiming to provide a clinical guideline and facilitate clinicians to have a better understanding of cemental tear.
Humans
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Dental Cementum/injuries*
;
Consensus
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Diagnosis, Differential
;
Cone-Beam Computed Tomography
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Tooth Fractures/therapy*
3.Effects of different disinfection methods on venipuncture disinfection of patients with psoriasis
Bin LIANG ; Jingjing ZHANG ; Jianhua YANG ; Yiyu WANG ; Yadi ZHANG ; Pingping LIANG ; Youfu XU
Chinese Journal of Nosocomiology 2025;35(18):2847-2850
OBJECTIVE To optimize the venipuncture disinfection procedures for the patients with psoriasis by modifying the skin pretreatment,number of times of disinfection and action time,evaluate the disinfection effects before and after the modification and observe the impact on skin barrier function.METHODS A total of 78 patients with psoriasis who were hospitalized in Air Force Medical Center of Special Medicine from Jan.2024 to Mar.2025 were enrolled in the study and were randomly divided into the control group and the study group,with 39 cases in each group.Both groups were disinfected with povidone iodine swabs.The control group was treated with a single clockwise spiral wipe centered on the puncture site,and the total time of embrocation and drying time was 60 s;the study group was treated with the modified disinfection method'pretreatment-bidirectional disinfec-tion-120-second drying',which was unidirectional wiping of puncture site skin of hand back with sterile swab in-filtrating with normal saline,a single clockwise spiral wipe centered on the puncture site,counter-clockwise wipe for two times,the total time of embrocation and drying 120 s in total.The skin specimens were collected from the puncture sites for culture and identification of pathogens before the disinfection and after the drying,and the trans-epidermal water loss(TEWL)volume was detected by TewameterTM 300 instrument.RESULTS Totally 16 types of pathogens were isolated from the two groups of patients before the disinfection,among which Staphylococcus spp was dominant.The bacterial colony counts were[26.00(8.00,74.00)]CFU/cm2 in the study group before the disinfection,[41.00(13.00,94.00)]CFU/cm2 in the control group,and there was no significant difference(P=0.081).The bacterial colony counts of the two groups were lower after the disinfection and drying than before the disinfection(P<0.001),and the bacterial colony counts of the study group were[0.00(0.00,1.00)]CFU/cm2,lower than[1.00(0.00,4.00)]CFU/cm2 of the control group(P=0.042).The TEWL value of the two groups was greater after the disinfection than before the disinfection(P<0.001),however,there was no between-group difference(P=0.933).CONCLUSION The modified disinfection procedure has more advantages in eradicating pathogens without increasing damage to skin barrier,it provides safer disinfection plans for the patients with psoriasis and is worthy to be promoted in the hospital.
4.Analysis of molecules and drug-resistant-characteristics of Staphylococcus aureus causing bone and joint infections
Yan WANG ; Jing YANG ; Guofei ZHAO ; Pingping SONG ; Yulong LIANG ; Ao ZHANG ; Jun WU
Chinese Journal of Clinical Laboratory Science 2025;43(4):261-267
Objective To investigate the molecular typing,virulence,and drug resistance characteristics of Staphylococcus aureus(SA)in bone and joint infections,providing basis for anti-infection treatment.Methods The SA strains isolated from inpatients with bone and joint infections in Beijing Jishuitan Hospital,Capital Medical University from January 2014 to December 2021 were collected.Multi-locus sequence typing(MLST)and Staphylococcal A protein(Spa)typing for all the strains and Staphylococcal cassette chromo-some mec(SCCmec)typing of methicillin-resistant Staphylococcus aureus(MRSA)were performed based on whole genome sequencing.The virulence genes and drug resistance genes of the strains were identified by online database.The antimicrobial susceptibility tests were carried by automatic microbiological assay system.Results MRSA accounted for 30.0%of the 100 isolated strains of SA.A total of 22 ST types and 39 Spa types were identified in the 100 strains of S.aureus,among which ST59(16.0%)and ST239(14.0%)were the dominant ST types,and t437(13.0%)and t030(10.0%)were the dominant Spa types.ST239-SCCmecⅢ-t030/t037 clone(46.7%)was the main epidemic clone in MRSA isolates.The biofilm gene(icaA,icaB,icaC,icaD,icaR),hemolysin gene(hlb,hld,hlgA,hlgB,hlgC),adhesion gene(clfA,clfB,fnbA,fnbB,ebp),and immune escape gene(adsA,sbi,scn)were widespread in all SA strains,with detection rates ranging from 89.0%to 100.0%.The detection rates of enterotoxin genes seb(43.3%),selk(93.8%)and selq(83.3%)in MRSA were significantly higher than those in methicillin-sensitive Staphylococcus aureus(MSSA)(all P<0.05).In terms of drug-resistance characteristics,the detection rate of the resistance gene blaZ(87.0%)was the highest among all the S.aureus strains.In the isolated MRSA strains,the detection rate of resistance genes for erm(A),tet(M),aph(3')-Ⅲ,ant(6)-Ⅰa,ant(9)-Ⅰa,and aac(6')-aph(2")ranged from 43.3%to 50.0%,which were significantly higher than those in MSSA(all P<0.05).The results of the drug-sensitivity test showed that the resistant rates of S.aureus strains to penicillin,erythromycin,and clindamycin were relatively high(89.0%,67.0%,and 51.0%,respectively).The resistant rates of MRSA to the antimicrobial agents commonly used in clinical practice were significantly higher than those of MSSA(all P<0.05).Conclusion The molecular epidemiological char-acteristics of SA strains isolated from bone and joint infections were diversified in our hospital.ST239-SCCmecⅢ-t030/t037 was the most common epidemic clone among the strains.There were significant differences in the resistance genes and drug resistance rates be-tween MRSA and MSSA strains,for which clinical attention should be paid.
5.Highlights and cutting-edge advances in hepatobiliary and pancreatic cancer research at the American Society of Clinical Oncology(ASCO)Annual Meeting 2025
Chaoman HUANG ; Wenyang LI ; Yanxi PAN ; Liang MA ; Jianhong ZHONG ; Pingping GUO ; Yili MA
Chinese Journal of General Surgery 2025;34(8):1738-1750
The 2025 American Society of Clinical Oncology(ASCO)Annual Meeting was held in Chicago from May 30 to June 3,2025.As one of the largest and most influential academic events in global oncology,the ASCO meeting brought together numerous world-class oncology experts.It focused on the unmet clinical needs in gastrointestinal malignancies such as hepatocellular carcinoma,cholangiocarcinoma,and pancreatic cancer,and presented a wealth of cutting-edge research findings and therapeutic innovations.These advances provide important evidence-based support for the diagnosis and treatment of hepatobiliary and pancreatic cancers.Based on the latest achievements presented at ASCO 2025,this article discusses the hot topics and future directions in the management of hepatobiliary and pancreatic tumors.
6.Safety analysis of blinatumomab in the treatment of pediatric B-cell acute lymphoblastic leukemia
Danni LI ; Wenwen DING ; Xiaona LIU ; Pingping WEI ; Lei ZHANG ; Hui LIANG
Adverse Drug Reactions Journal 2025;27(9):545-551
Objective:To analyze the safety profile of blinatumomab in children with B-cell acute lymphoblastic leukemia (ALL).Methods:Demographic and clinical data of 33 pediatric B-cell ALL patients treated with blinatumomab in the Women and Children′s Hospital, Qingdao University from January 2022 to November 2024 were retrospectively collected. Demographic data included gender and age, while clinical data comprised leukemia risk stratification, minimal residual disease (MRD) status before blinatumomab use, treatment duration (14-day or 28-day courses), and safety outcomes included drug-related fever, cytokine release syndrome (CRS), tachycardia, blood pressure abnormalities, elevated transaminases, immune effector cell-associated neurotoxicity syndrome (ICANS), oral mucositis, rash, and infections. Patients were stratified by CRS occurrence and transaminase elevation for comparative analysis of demographic/clinical characteristics.Results:A total of 33 children with B-cell type ALL who received blinatumomab treatment were included. Among them, 21 were male and 12 were female; the age was 5.2 (4.7, 7.0) years, ranging from 1.7 to 10.0 years. Risk stratification included low (2 cases), intermediate (23 cases), and high (8 cases) risk. Pre-treatment MRD was negative in 16 and positive in 17 patients. Eight patients received a 14-day blinatumomab course, while 25 cases received a 28-day course. The overall adverse events (AEs) rate was 81.8% (27/33). Among the 27 patients who experienced AEs, there were 5 cases (18.5%) of severe adverse events (all grade 3). The specific adverse events that occurred in the 33 patients included drug-related fever in 21 cases (63.6%) [including 16 cases (48.5%) of CRS], elevated transaminases in 10 cases (30.3%), infectious symptoms in 5 cases (15.2%), rash in 4 cases (12.1%), tachycardia in 3 cases (9.1%), ICANS in 2 cases (6.1%), and oral mucositis in 1 case (3.0%). No statistically significant differences were observed in gender, age, risk stratification, pretreatment MRD status, and treatment duration between the CRS and non-CRS groups, transaminase-elevated and normal groups (all P>0.05). Conclusions:In pediatric B-cell ALL, the most common AEs related to blinatumomab are CRS and elevated transaminases, but most reactions are mild, with rapid recovery and favorable tolerability.
7.Highlights and cutting-edge advances in hepatobiliary and pancreatic cancer research at the American Society of Clinical Oncology(ASCO)Annual Meeting 2025
Chaoman HUANG ; Wenyang LI ; Yanxi PAN ; Liang MA ; Jianhong ZHONG ; Pingping GUO ; Yili MA
Chinese Journal of General Surgery 2025;34(8):1738-1750
The 2025 American Society of Clinical Oncology(ASCO)Annual Meeting was held in Chicago from May 30 to June 3,2025.As one of the largest and most influential academic events in global oncology,the ASCO meeting brought together numerous world-class oncology experts.It focused on the unmet clinical needs in gastrointestinal malignancies such as hepatocellular carcinoma,cholangiocarcinoma,and pancreatic cancer,and presented a wealth of cutting-edge research findings and therapeutic innovations.These advances provide important evidence-based support for the diagnosis and treatment of hepatobiliary and pancreatic cancers.Based on the latest achievements presented at ASCO 2025,this article discusses the hot topics and future directions in the management of hepatobiliary and pancreatic tumors.
8.Effects of different disinfection methods on venipuncture disinfection of patients with psoriasis
Bin LIANG ; Jingjing ZHANG ; Jianhua YANG ; Yiyu WANG ; Yadi ZHANG ; Pingping LIANG ; Youfu XU
Chinese Journal of Nosocomiology 2025;35(18):2847-2850
OBJECTIVE To optimize the venipuncture disinfection procedures for the patients with psoriasis by modifying the skin pretreatment,number of times of disinfection and action time,evaluate the disinfection effects before and after the modification and observe the impact on skin barrier function.METHODS A total of 78 patients with psoriasis who were hospitalized in Air Force Medical Center of Special Medicine from Jan.2024 to Mar.2025 were enrolled in the study and were randomly divided into the control group and the study group,with 39 cases in each group.Both groups were disinfected with povidone iodine swabs.The control group was treated with a single clockwise spiral wipe centered on the puncture site,and the total time of embrocation and drying time was 60 s;the study group was treated with the modified disinfection method'pretreatment-bidirectional disinfec-tion-120-second drying',which was unidirectional wiping of puncture site skin of hand back with sterile swab in-filtrating with normal saline,a single clockwise spiral wipe centered on the puncture site,counter-clockwise wipe for two times,the total time of embrocation and drying 120 s in total.The skin specimens were collected from the puncture sites for culture and identification of pathogens before the disinfection and after the drying,and the trans-epidermal water loss(TEWL)volume was detected by TewameterTM 300 instrument.RESULTS Totally 16 types of pathogens were isolated from the two groups of patients before the disinfection,among which Staphylococcus spp was dominant.The bacterial colony counts were[26.00(8.00,74.00)]CFU/cm2 in the study group before the disinfection,[41.00(13.00,94.00)]CFU/cm2 in the control group,and there was no significant difference(P=0.081).The bacterial colony counts of the two groups were lower after the disinfection and drying than before the disinfection(P<0.001),and the bacterial colony counts of the study group were[0.00(0.00,1.00)]CFU/cm2,lower than[1.00(0.00,4.00)]CFU/cm2 of the control group(P=0.042).The TEWL value of the two groups was greater after the disinfection than before the disinfection(P<0.001),however,there was no between-group difference(P=0.933).CONCLUSION The modified disinfection procedure has more advantages in eradicating pathogens without increasing damage to skin barrier,it provides safer disinfection plans for the patients with psoriasis and is worthy to be promoted in the hospital.
9.Safety analysis of blinatumomab in the treatment of pediatric B-cell acute lymphoblastic leukemia
Danni LI ; Wenwen DING ; Xiaona LIU ; Pingping WEI ; Lei ZHANG ; Hui LIANG
Adverse Drug Reactions Journal 2025;27(9):545-551
Objective:To analyze the safety profile of blinatumomab in children with B-cell acute lymphoblastic leukemia (ALL).Methods:Demographic and clinical data of 33 pediatric B-cell ALL patients treated with blinatumomab in the Women and Children′s Hospital, Qingdao University from January 2022 to November 2024 were retrospectively collected. Demographic data included gender and age, while clinical data comprised leukemia risk stratification, minimal residual disease (MRD) status before blinatumomab use, treatment duration (14-day or 28-day courses), and safety outcomes included drug-related fever, cytokine release syndrome (CRS), tachycardia, blood pressure abnormalities, elevated transaminases, immune effector cell-associated neurotoxicity syndrome (ICANS), oral mucositis, rash, and infections. Patients were stratified by CRS occurrence and transaminase elevation for comparative analysis of demographic/clinical characteristics.Results:A total of 33 children with B-cell type ALL who received blinatumomab treatment were included. Among them, 21 were male and 12 were female; the age was 5.2 (4.7, 7.0) years, ranging from 1.7 to 10.0 years. Risk stratification included low (2 cases), intermediate (23 cases), and high (8 cases) risk. Pre-treatment MRD was negative in 16 and positive in 17 patients. Eight patients received a 14-day blinatumomab course, while 25 cases received a 28-day course. The overall adverse events (AEs) rate was 81.8% (27/33). Among the 27 patients who experienced AEs, there were 5 cases (18.5%) of severe adverse events (all grade 3). The specific adverse events that occurred in the 33 patients included drug-related fever in 21 cases (63.6%) [including 16 cases (48.5%) of CRS], elevated transaminases in 10 cases (30.3%), infectious symptoms in 5 cases (15.2%), rash in 4 cases (12.1%), tachycardia in 3 cases (9.1%), ICANS in 2 cases (6.1%), and oral mucositis in 1 case (3.0%). No statistically significant differences were observed in gender, age, risk stratification, pretreatment MRD status, and treatment duration between the CRS and non-CRS groups, transaminase-elevated and normal groups (all P>0.05). Conclusions:In pediatric B-cell ALL, the most common AEs related to blinatumomab are CRS and elevated transaminases, but most reactions are mild, with rapid recovery and favorable tolerability.
10.Analysis of molecules and drug-resistant-characteristics of Staphylococcus aureus causing bone and joint infections
Yan WANG ; Jing YANG ; Guofei ZHAO ; Pingping SONG ; Yulong LIANG ; Ao ZHANG ; Jun WU
Chinese Journal of Clinical Laboratory Science 2025;43(4):261-267
Objective To investigate the molecular typing,virulence,and drug resistance characteristics of Staphylococcus aureus(SA)in bone and joint infections,providing basis for anti-infection treatment.Methods The SA strains isolated from inpatients with bone and joint infections in Beijing Jishuitan Hospital,Capital Medical University from January 2014 to December 2021 were collected.Multi-locus sequence typing(MLST)and Staphylococcal A protein(Spa)typing for all the strains and Staphylococcal cassette chromo-some mec(SCCmec)typing of methicillin-resistant Staphylococcus aureus(MRSA)were performed based on whole genome sequencing.The virulence genes and drug resistance genes of the strains were identified by online database.The antimicrobial susceptibility tests were carried by automatic microbiological assay system.Results MRSA accounted for 30.0%of the 100 isolated strains of SA.A total of 22 ST types and 39 Spa types were identified in the 100 strains of S.aureus,among which ST59(16.0%)and ST239(14.0%)were the dominant ST types,and t437(13.0%)and t030(10.0%)were the dominant Spa types.ST239-SCCmecⅢ-t030/t037 clone(46.7%)was the main epidemic clone in MRSA isolates.The biofilm gene(icaA,icaB,icaC,icaD,icaR),hemolysin gene(hlb,hld,hlgA,hlgB,hlgC),adhesion gene(clfA,clfB,fnbA,fnbB,ebp),and immune escape gene(adsA,sbi,scn)were widespread in all SA strains,with detection rates ranging from 89.0%to 100.0%.The detection rates of enterotoxin genes seb(43.3%),selk(93.8%)and selq(83.3%)in MRSA were significantly higher than those in methicillin-sensitive Staphylococcus aureus(MSSA)(all P<0.05).In terms of drug-resistance characteristics,the detection rate of the resistance gene blaZ(87.0%)was the highest among all the S.aureus strains.In the isolated MRSA strains,the detection rate of resistance genes for erm(A),tet(M),aph(3')-Ⅲ,ant(6)-Ⅰa,ant(9)-Ⅰa,and aac(6')-aph(2")ranged from 43.3%to 50.0%,which were significantly higher than those in MSSA(all P<0.05).The results of the drug-sensitivity test showed that the resistant rates of S.aureus strains to penicillin,erythromycin,and clindamycin were relatively high(89.0%,67.0%,and 51.0%,respectively).The resistant rates of MRSA to the antimicrobial agents commonly used in clinical practice were significantly higher than those of MSSA(all P<0.05).Conclusion The molecular epidemiological char-acteristics of SA strains isolated from bone and joint infections were diversified in our hospital.ST239-SCCmecⅢ-t030/t037 was the most common epidemic clone among the strains.There were significant differences in the resistance genes and drug resistance rates be-tween MRSA and MSSA strains,for which clinical attention should be paid.

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