1.Analysis and prediction of global burden due to cystic echinococcosis from 1990 to 2035
Zhen LAI ; Gang LIU ; Haili ZHAO ; Miaomiao QIU ; Jian CHEN ; En LUO ; Junguo XIN ; Xiaohong YANG
Chinese Journal of Schistosomiasis Control 2025;37(3):255-267
Objective To investigate the trends in the global burden due to cystic echinococcosis from 1990 to 2021, and to predict the global burden of cystic echinococcosis from 2022 to 2035, so as to provide insights into formulation of the cystic echinococcosis control strategy. Methods The global age-standardized prevalence, mortality, disability-adjusted life years (DALYs) rates and their 95% uncertainty intervals (UI) of cystic echinococcosis from 1990 to 2021 were captured from the Global Burden of Disease Study 2021 (GBD 2021) database, and the trends in the global burden of cystic echinococcosis from 1990 to 2021 were analyzed using the Joinpoint regression model. The associations between the global burden of cystic echinococcosis and socio-demographic index (SDI) were examined using a smoothing spline model and frontier analysis, and the global burden of cystic echinococcosis was projected from 2022 to 2035 using the Bayesian age-period-cohort (BAPC) model. Results The global agestandardized prevalence, mortality and DALYs rates of cystic echinococcosis were 7.69/105 [95% UI: (6.27/105, 9.51/105)], 0.02/105 [95% UI: (0.01/105, 0.02/105)], and 1.32/105 [95% UI: (0.99/105, 1.69/105)] in 2021. The global age-standardized prevalence of cystic echinococcosis appeared a tendency towards a rise by 0.14% per year from 1990 to 2021, and the global age-standardized mortality and DALYs rates of cystic echinococcosis appeared a tendency towards a decline by 4.68% and 4.01% per year from 1990 to 2021, respectively. Joinpoint regression analysis showed that global age-standardized prevalence of cystic echinococcosis appeared a tendency towards a decline from 1990 to 2000 [annual percent change (APC) = −0.66%, 95% confidence interval (CI): (−0.70%, −0.61%)] and from 2005 to 2015 [APC = −0.88%, 95% CI: (−0.93%, −0.82%)], and towards a rise from 2000 to 2005 [APC = 3.68%, 95% CI: (3.49%, 3.87%)] and from 2015 to 2021 [APC=0.30%, 95%CI: (0.19%, 0.40%)].Theagestandardized prevalence (r = −0.17, P < 0.05), mortality (r = −0.67, P < 0.05) and DALYs rates of cystic echinococcosis (r = −0.60, P < 0.05) all correlated negatively with SDI across 21 geographical regions from 1990 to 2021, and the age-standardized mortality (r = −0.61, P < 0.05) and DALYs rates (r = −0.44, P < 0.05) both correlated negatively with SDI across 204 countries and territories in 2021. Frontier analysis revealed that the age-standardized DALYs rate of cystic echinococcosis was still not in line with the frontier in some high-SDI countries or territories. In addition, the global age-standardized prevalence was projected with the BAPC model to appear a tendency towards a rise among both men [estimated annual percent change (EAPC) = 0.18%, 95% CI: (0.13%, 0.23%)] and women [EAPC = 0.29%, 95% CI: (0.24%, 0.34%)] from 2022 to 2035, and the global age-standardized mortality [men: EAPC = −4.71%, 95% CI: (−4.71%, −4.37%); women: EAPC = −4.74%, 95% CI: (−4.74%, −4.74%)] and DALYs rates [men: EAPC = −3.35%, 95% CI: (−3.36%, −3.34%); women: EAPC = −3.17%, 95% CI: (−3.18%, −3.16%)] were projected to appear a tendency towards a decline among both men and women. Conclusions The global burden of cystic echinococcosis appeared an overall tendency towards a decline from 1990 to 2021; however, the global prevalence of cystic echinococcosis is projected to appear a tendency towards a rise from 2022 to 2035. Intensified cystic echinococcosis control programmes are recommended.
2.Intervention effects of icariin combined with glucocorticoid in rats of steroid-resistant nephrotic syndrome
Can LIU ; En-Lai DAI ; Zhao-Ran DING ; Shu-Wen DUAN
The Chinese Journal of Clinical Pharmacology 2024;40(13):1913-1917
Objective To investigate the interventional effects of Icariin(IC A)combined with prednisone acetate tablets(PAT)in rats with steroid-resistant nephrotic syndrome(SRNS)model.Methods Male SD rats were used to construct the SRNS model with 2 injections of adriamycin(ADR),and were randomly divided into the model group,PAT group,ICA group,and the combined group,with 10 rats in each group after successful modeling;another 10 rats were taken as the blank group.The blank and model groups were given 0.9%NaCl;the PAT group was given 6.3 mg·kg-1·d-1 PAT;the ICA group was given 50 mg·kg-1·d-1 ICA;and the combined group was given 6.3 mg·kg-1·d-1 PAT+50 mg·kg-1·d-1 ICA.The volume of gavage of the five groups of rats was 1 mL·100 g-1,and the drug was administered once a day for 6 weeks.The renal function and blood lipid level of rats in each group were compared;the expression of calcium/calmodulin dependent protein kinase Ⅱ α(CaMK Ⅱα),cofilin-1 and F-actin were detected by Western blotting.Results Urinary protein quantification values at 8 weeks in blank,model,PAT,ICA and combined groups were(6.66±1.48),(178.38±8.96),(161.56±5.49),(157.13±8.32)and(96.90±5.05)mg·24 hi-1;serum creatinine levels were(30.90±1.79),(41.10±2.77),(34.90±2.03),(35.10±2.18)and(31.90±2.47)μmol·L-1;triglycerides levels were(0.87±0.14),(2.30±0.41),(1.94±0.44),(1.17±0.59)and(0.89±0.30)mmol·L-1;total cholesterol levels were(1.54±0.08),(2.53±0.22),(2.14±0.59),(2.27±0.31)and(1.93±0.32)mmol·L-1;the relative expression levels of CaMK Ⅱ α proteins were 0.88±0.09,0.65±0.06,0.71±0.08,0.76±0.07 and 0.88±0.08;the p-Cofilin-1/Cofilin-1 ratios were 0.56±0.27,2.52±0.04,0.75±0.02,0.91±0.20 and 0.53±0.05;the relative expression levels of F-actin protein were 0.93±0.01,0.64±0.01,0.75±0.02,0.80±0.01 and 0.85±0.00,respectively.The differences of the above indexes in the model group were statistically significant compared with those in the blank group and the combined group(all P<0.05).Conclusion ICA combined with PAT can improve renal function,lipid levels,improve renal histopathological structure,and promote skeletal protein remodeling in SRNS rats by regulating CaMK Ⅱ α/Cofilin-1/F-actin pathway.
3.Research status of the correlation between ferroptosis and renal fibrosis
Li-Juan LIANG ; En-Lai DAI ; Jun-Yuan BAI ; Can LIU ; Zhao-Ran DING ; Jie ZHANG
The Chinese Journal of Clinical Pharmacology 2024;40(15):2278-2282
Renal fibrosis is a common pathological manifestation of all chronic kidney diseases.Ferroptosis is closely related to the pathogenesis of renal fibrosis and can influence the onset of renal fibrosis,and it is the most critical step in the development of renal fibrosis.The paper describes the relationship between ferroptosis and renal fibrosis,discusses the research progress of ferroptosis on renal fibrosis,and further summarizes,analyzes,and describes the effective and highly targeted natural active ingredients of traditional Chinese medicines against ferroptosis,and concludes that the reversal of renal fibrosis is achieved through the regulation of the key targets of ferroptosis,with a view to providing a broad new direction for its prospects in the field of renal fibrotic disease prevention and treatment;and to provide a scientific guide for clinical treatment and basis for clinical treatment.
4.Study on the Chinese medicine symptoms of kidney yang deficiency based on sickness behaviour in rats with adriamycin nephropathy
Zhao-Ran DING ; En-Lai DAI ; Wei-Wei HUANG ; Can LIU ; Shu-Wen DUAN ; Sen-Bing ZHANG
The Chinese Journal of Clinical Pharmacology 2024;40(20):3018-3022
Objective To study the common basis and association between sickness behaviour and occurrence of classical symptoms of kidney yang deficiency of rats with adriamycin nephropathy.Methods The SD rats were given adriamycin by tail-vein injection for 2 times(4.0 and 3.5 mg·kg-1,one week apart)to construct the model of nephrotic syndrome with Chinese medicine symptom of kidney yang deficiency.After successful modeling,the model rats were randomly divided into adriamycin group(ADR group),corticosterone group(CORT group)and hydrocortisone group(HYD group),with 12 rats per group;another 12 normal rats were taken as normal group.In the HYD group,25 mg·kg-1·d-1 HYD was administered for 14 d to establish kidney yang deficiency model with simple hypothalamus-pituitary-adrenal cortex(HPA)axis inhibition.CORT group was adding 25 μg·mL-1 corticosterone to the water for 6 weeks,and the others drinking water supplied.The levels of urinary 17-hydroxy steroid were measured by enzyme linked immunosorbent assay.Glucocorticoid receptor(GR)and nuclear factor-kappa B(NF-κB)protein expression levels in kidney and hypothalamus were detected by Western blotting.Results In the normal,ADR,CORT and HYD groups,the urinary 17-hydroxysteroid levels were(19.14±1.94),(10.07±1.62),(20.30±1.55)and(14.23±2.37)μg·L-1;the relative expression levels of GR protein in hypothalamic were 0.63±0.05,0.11±0.05,0.85±0.08 and 0.35±0.06;the relative expression levels of NF-κB protein in hypothalamic were 0.06±0.03,0.96±0.03,0.59±0.01 and 0.23±0.04;the relative expression levels of GR protein in kidney tissue were 0.94±0.06,0.06±0.02,0.40±0.02 and 0.09±0.08;the relative expression levels of NF-κB protein in kidney tissue were 0.07±0.05,0.81±0.12,0.72±0.07 and 0.49±0.08,respectively.Compared with the ADR and HYD groups,the above indexes in the normal group were statistically significant(P<0.05,P<0.01).And compared with the ADR group,the relative expression levels of NF-κB protein in renal tissue with CORT group were not statistically significant(P>0.05),but the other indexes in CORT group were statistically significant(all P<0.01).Conclusion HPA axis dysfunction with GR damaged and activated inflammatory levels are the common basis for the combination of typical symptoms of kidney yang deficiency and sickness behaviour which characterised by"deficiency and cold syndrome".
5.Multi-omics analysis of adamantinomatous craniopharyngiomas reveals distinct molecular subgroups with prognostic and treatment response significance
Xianlong WANG ; Chuan ZHAO ; Jincheng LIN ; Hongxing LIU ; Qiuhong ZENG ; Huadong CHEN ; Ye WANG ; Dapeng XU ; Wen CHEN ; Moping XU ; En ZHANG ; Da LIN ; Zhixiong LIN
Chinese Medical Journal 2024;137(7):859-870
Background::Adamantinomatous craniopharyngioma (ACP) is the commonest pediatric sellar tumor. No effective drug is available and interpatient heterogeneity is prominent. This study aimed to identify distinct molecular subgroups of ACP based on the multi-omics profiles, imaging findings, and histological features, in order to predict the response to anti-inflammatory treatment and immunotherapies.Methods::Totally 142 Chinese cases diagnosed with craniopharyngiomas were profiled, including 119 ACPs and 23 papillary craniopharyngiomas. Whole-exome sequencing (151 tumors, including recurrent ones), RNA sequencing (84 tumors), and DNA methylome profiling (95 tumors) were performed. Consensus clustering and non-negative matrix factorization were used for subgrouping, and Cox regression were utilized for prognostic evaluation, respectively.Results::Three distinct molecular subgroups were identified: WNT, ImA, and ImB. The WNT subgroup showed higher Wnt/β-catenin pathway activity, with a greater number of epithelial cells and more predominantly solid tumors. The ImA and ImB subgroups had activated inflammatory and interferon response pathways, with enhanced immune cell infiltration and more predominantly cystic tumors. Mitogen-activated protein kinases (MEK/MAPK) signaling was activated only in ImA samples, while IL-6 and epithelial-mesenchymal transition biomarkers were highly expressed in the ImB group, mostly consisting of children. The degree of astrogliosis was significantly elevated in the ImA group, with severe finger-like protrusions at the invasive front of the tumor. The molecular subgrouping was an independent prognostic factor, with the WNT group having longer event-free survival than ImB (Cox, P = 0.04). ImA/ImB cases were more likely to respond to immune checkpoint blockade (ICB) therapy than the WNT group ( P <0.01). In the preliminary screening of subtyping markers, CD38 was significantly downregulated in WNT compared with ImA and ImB ( P = 0.01). Conclusions::ACP comprises three molecular subtypes with distinct imaging and histological features. The prognosis of the WNT type is better than that of the ImB group, which is more likely to benefit from the ICB treatment.
6.Aucubin combined with ADSCs-exos protects TBHP-induced nucleus pulposus cells via TLR4/NF-κB pathway.
Lei YANG ; Zhao-Yong LI ; Lu MA ; Yan-Tao GUO ; Shao-Feng YANG ; Hui XIONG ; Bo-Yu WU ; Jia-Hao DUAN ; En-Xu LIU ; Chao ZHANG ; Ying NIE ; Long CHEN ; Lin-Quan LIU
China Journal of Chinese Materia Medica 2023;48(19):5294-5303
This paper aims to investigate the effects and mechanisms of adipose-derived stem cells-exosomes(ADSCs-exos) toge-ther with aucubin in protecting human-derived nucleus pulposus cells(NPCs) from inflammatory injury, senescence, and apoptosis. The tert-butyl hydroperoxide(TBHP)-induced NPCs were assigned into normal, model, aucubin, ADSCs-exos, and aucubin+ADSCs-exos groups. The cell viability was examined by cell counting kit-8(CCK-8), cell proliferation by EdU staining, cell senescence by senescence-associated-β-galactosidase(SA-β-Gal), and cell cycle and apoptosis by flow cytometry. Enzyme-linked immunosorbent assay was employed to examine the expression of interleukin-1β(IL-1β), IL-10, and tumor necrosis factor-α(TNF-α). Real-time fluorescence quantitative PCR and Western blot were employed to determine the mRNA and protein levels of aggregated proteoglycan(aggrecan), type Ⅱ collagen alpha 1(COL2A1), Toll-like receptor 4(TLR4), and nuclear factor-kappa B(NF-κB). The results showed that compared with the model group, the aucubin or ADSCs-exos group showed enhanced viability and proliferation of NPCs, decreased proportion of G_0/G_1 phase cells, increased proportion of S phase cells, reduced apoptosis and proportion of cells in senescence, lowered IL-1β and TNF-α levels, elevated IL-10 level, down-regulated mRNA and protein levels of TLR4 and NF-κB, and up-regulated mRNA and protein levels of aggrecan and COL2A1. Compared with the aucubin or ADSCs-exos group, the aucubin+ADSCs-exos combination further increased the viability and proliferation of NPCs, decreased the proportion of G_0/G_1 phase cells, increased the proportion of S phase cells, reduced the apoptosis and proportion of cells in senescence, lowered the IL-1β and TNF-α levels, elevated the IL-10 level, down-regulated the mRNA and protein levels of TLR4 and NF-κB, and up-regulated the mRNA and protein levels of aggrecan and COL2A1. In summary, both aucubin and ADSCs-exos could exert protective effects by inhibiting inflammatory responses, reducing apoptosis and senescence of NPCs, improving cell viability and proliferation as well as extracellular matrix synthesis, which may be associated with the inhibition of TLR4/NF-κB signaling pathway activation. The combination of both plays a synergistic role in the protective effects.
Humans
;
NF-kappa B/metabolism*
;
Interleukin-10
;
Nucleus Pulposus/metabolism*
;
Tumor Necrosis Factor-alpha/metabolism*
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Aggrecans/metabolism*
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Toll-Like Receptor 4/metabolism*
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RNA, Messenger/metabolism*
7.Multicenter Prospective Study of Different Induction Regimens of Azacytidine in Treatment of Elderly Patients with Acute Myeloid Leukemia.
Cai-Zhao WANG ; Xiao-Xia CHU ; Hong-Yan YU ; En-Qin YANG ; Ling WANG ; Xiu-Zhi DENG ; Xue-Hong RAN ; Li-Qing WANG ; Chun-Ting ZHAO ; Xiao-Dan LIU
Journal of Experimental Hematology 2023;31(4):1005-1013
OBJECTIVE:
To observe the efficacy and safety of different induction regimens of same total dosage of azacitidine (Aza), including standard dose (standard dose group) and low-dose long-term (adjusted dose group), in the treatment of elderly acute myeloid leukemia (AML).
METHODS:
A total of 103 elderly patients with AML (non-acute promyelocytic leukemia) from January 2020 to June 2021 were enrolled. Aza was administered at the standard dose of 75 mg/(m2·d) for 7 days in the standard dose group (50 cases), while at 100 mg/d for 7-12 days in the adjusted dose group (53 cases). The administration days in adjusted dose group was calculated based on the total standard dose of the patient's single course of treatment. The efficacy and safety between standard dose group and adjusted dose group were compared. Subgroup analysis were performed in the two groups for Aza alone, Aza combined with BCL-2 inhibitor, and Aza combined with low-dose chemotherapy for efficacy and safety.
RESULTS:
There were no significant differences in overall response rate (ORR), incidence of adverse reaction, and 1-year overall survival (OS) rate between standard dose group and adjusted dose group (P >0.05). The ORR of combination was higher than that of Aza alone (P < 0.05), while there was no significant difference in ORR between Aza combined with BCL-2 inhibitor and Aza combined with low-dose chemotherapy (P >0.05). The combination of BCL-2 inhibitor did not increase the incidence of adverse reactions compared wtih Aza alone. There was a higher risk of myelosuppression and pulmonary infection with a combination of low-dose chemotherapy than with a combination of BCL-2 inhibitor and Aza alone (P <0.05). No significant difference was observed in 1-year OS between Aza alone, Aza combined with BCL-2 inhibitor, and Aza combined with low-dose chemotherapy (P >0.05).
CONCLUSIONS
Both two induction regimens can be used in elderly AML patients who cannot tolerate intensive chemotherapy with similar overall effectiveness and safety. Aza combined with low-dose chemotherapy may result in increased ORR and an increased incidence of serious adverse reactions, and may not result in longer survival compared with Aza alone. Aza combined with BCL-2 inhibitor not only has similar effect in complete remission, objective response rate, and OS compared with Aza combined with low-dose chemotherapy, but also has higher safety.
Humans
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Aged
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Azacitidine/therapeutic use*
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Prospective Studies
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Treatment Outcome
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Antineoplastic Combined Chemotherapy Protocols
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Leukemia, Myeloid, Acute/etiology*
;
Proto-Oncogene Proteins c-bcl-2
8.Antimicrobial susceptibility of Gram-positive organisms:Results from China antimicrobial resistance surveillance trial(CARST)program,2021-2022
Yun LI ; Bo ZHENG ; Feng XUE ; Xiu-Zhen ZHANG ; Yun-Jian HU ; Yu-Fen JIN ; Jian-Hong ZHAO ; Shi-Yang PAN ; Wei GUO ; Feng ZHAO ; Yun-Song YU ; Xuan CAI ; Wen-En LIU ; De-Hua LIU ; Ying FEI ; Jia-Yun LIU ; Feng-Yan PEI ; Ling MENG ; Ping JI ; Jin TANG ; Kai XU ; Lei ZHU ; Cun-Wei CAO ; He-Ping XU ; Shan WANG ; Lan-Qing CUI ; Jia ZHANG ; Yao-Yao LIU
The Chinese Journal of Clinical Pharmacology 2023;39(23):3509-3524
Objective To investigate the Gram-positive coccus resistance in nationwide's tertiary hospitals and understand the trend of antimicrobial resistance.Methods All the clinical isolates were collected from 19 hospitals and the minimal inhibitory concentrations(MICs)were tested using agar/broth dilution method recommended.Results A total of 1 974 pathogenic Gram-positive coccus from 19 tertiary hospitals in 19 cities nationwide over the period from July 2021 to June 2022 were studied.Based on the MIC results,the prevalence of methicillin resistant Stapylococcus aureus(MRSA)and methicillin resistant Stapylococcus epidermidis(MRSE)were 36.4%and 79.9%respectively.No vancomycin insensitivity Staphylococcus was detected.Staphylococcus aureus were 100%susceptibility to linezolid and teicoplanin.Antibiotic resistance rate of Enterococcus faecalis and Enterococcus faecium to ampicillin were 3.1%and 92.9%.The detectation rate of vancomycin resistant Enterococcus(VRE)was 1.6%.Nonsusceptibility rate of Enterococcus faecalis to linezolid was 32.2%,two consecutive monitoring rises and nonsusceptibility rate of Enterococcus faecium(12.5%)was also significantly increased.The prevalence of penicillin non-susceptible Streptococcus pneumoniae(PNSSP)was 0.8%based on non-meningitis and parenteral administration criterion,decrease of nearly 30 percentage points from the previous surveillance.While for cases of oral penicillin,the rate was 71.8%,showing similar to last time.The results indicated that the number of strains with higher MIC value of penicillin(MIC ≥4 mg·L-1)decreased significantly.There were no significant differences of resistance rates of Stapylococcus aureus,Stapylococcus epidermidis,Enterococcus faecalis,Enterococcus faecium and Streptococcus pneumoniae among various groups such as different department,age,or specimen source.Conclusion VRE detection ratio stablized at a relatively low level.The number of Streptococcus pneumoniae with higher MIC value of penicillin decreased significantly compared with the previous monitoring.The increase of linezolidin-insensitive Enterococcus was noteworthy.
9.Antimicrobial susceptibility of Gram-negative organisms:Results from China antimicrobial resistance surveillance trial(CARST)program,2021-2022
Yun LI ; Bo ZHENG ; Feng XUE ; Xiu-Zhen ZHANG ; Yun-Jian HU ; Yu-Fen JIN ; Jian-Hong ZHAO ; Shi-Yang PAN ; Wei GUO ; Feng ZHAO ; Yun-Song YU ; Xuan CAI ; Wen-En LIU ; De-Hua LIU ; Ying FEI ; Jia-Yun LIU ; Feng-Yan PEI ; Ling MENG ; Ping JI ; Jin TANG ; Kai XU ; Lei ZHU ; Cun-Wei CAO ; He-Ping XU ; Shan WANG ; Lan-Qing CUI ; Jia ZHANG ; Yao-Yao LIU
The Chinese Journal of Clinical Pharmacology 2023;39(23):3525-3544
Objective To investigate the Gram-negative bacteria resistance in nationwide's tertiary hospitals and understand the trend of antimicrobial resistance.Method All the clinical isolates were collected from 19 hospitals and the minimal inhibitory concentrations(MICs)were tested using agar/broth dilution method recommended.Results A total of 4 066 pathogenic isolates from 19 tertiary hospitals in 19 cities nationwide over the period from July 2021 to June 2022 were studied.Based on the MIC results,Escherichia coli and Klebsiella pneumoniae showed extended spectrum β-lactamase(ESBLs)phenotype rates of 55.0%and 21.0%,respectively,ESBLs phenotype rate of Klebsiella pneumoniae keep going down.The ratios of carbapenems resistance Klebsiella pneumoniae increased by 5 percentage points compared with the previous monitoring.Carbapenems,moxalactam,sitafloxacin,β-lactam combination agents,fosfomycin trometamol,and amikacin displayed desirable antibacterial activity against Enterbacterales,susceptibal rates were above 75%.In addition,tigacycline,omacycline,colistin and fluoxefin maintained good antibacterial activity against their respective effective bacteria/species,and the bacterial sensitivity rates by more than 80%.Resistance rates of Pseudomonas aeruginosa and Acinetobacter baumannnii to imipenem were 26.3%and 72.1%and multidrug-resistant(MDR)detection rates were 41.1%and 77.3%,extensively drug-resistant(XDR)were 12.0%and 71.8%,respectively.Comparison of drug resistance rates from different wards,ages and specimen sources indicated that the proportion of resistance in Klebsiella pneumoniae and Acinetobacter baumannii isolated from intensive care unit(ICU)were significantly higher than non-ICU.Carbapenem resistance rates of Klebsiella pneumoniae isolated from ICU were more than 35%.Resistance rates of Haemophilus influenzae isolated in children to β-lactam,macrolide,clindamycin and ESBLs detection rate in Klebsiella pneumoniae isolated from children were more than those from adults and the old people,so bacterial resistance in children is an important problem in China.Conclusion ESBLs detection rate of Escherichia coli increased slightly after years of continuous decline.The proportion of carbapenem resistant Pseudomonas aeruginosa was stable,but the resistance rate of Klebsiella pneumoniae and Acinetobacter baumannii to carbapenems was still increased,which should be paid more attention.
10.Comparison of Application of MD-VF-Auto SEM Method and Plankton Gene Multiplex PCR System in the Diagnosis of Drowning.
Jian-Miao ZHANG ; Tian-Chun LIN ; Zhen-Yu LIAO ; Yu-Kun DU ; Zhong-Hao YU ; Jing-Jian LIU ; Sai-Qun WU ; Xiao-Dong KANG ; Qu-Yi XU ; He SHI ; Jian ZHAO ; Chao LIU ; Dang-En GU
Journal of Forensic Medicine 2022;38(1):114-118
OBJECTIVES:
To compare the application effect of microwave digestion - vacuum filtration - automated scanning electron microscopy (MD-VF-Auto SEM) method and plankton gene multiplex PCR system in the diagnosis of drowning.
METHODS:
Lung, liver and kidney tissue of 10 non-drowning cases and 50 drowning cases were prepared for further MD-VF-Auto SEM method analysis and plankton gene multiplex PCR system analysis. The positive detection rate of the two methods in each tissue was calculated.
RESULTS:
The positive rate of the MD-VF-Auto SEM method detecting diatoms in drowning cases was 100%, and few diatoms were detected in the liver and kidney tissues of 6 non-drowning cases. By using the plankton gene multiplex PCR system, the diatom positive rate of drowning cases was 84%, and all the non-drowning cases were negative. There were significant differences in the positive rate of the liver, kidney tissues between MD-VF-Auto SEM method and plankton gene multiplex PCR system (P<0.05), as well as the total positive rate of cases. However, no significant differences were found in the positive rates of lung tissues (P>0.05).
CONCLUSIONS
MD-VF-Auto SEM method is more sensitive than plankton gene multiplex PCR system in diatom test. But the plankton gene multiplex PCR system can also detect plankton other than diatoms. Combination of the two methods can provide a more reliable basis for the diagnosis of drowning.
Diatoms/genetics*
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Drowning/diagnosis*
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Humans
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Liver
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Lung
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Microscopy, Electron, Scanning
;
Multiplex Polymerase Chain Reaction
;
Plankton/genetics*

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