1.Multidimensional supportive psychological intervention in clinical practice teaching of andrological nursing
Li-Hong LI ; Ya-Ting SUN ; De-Yu KONG ; Shan-Na SU ; Xue ZHANG ; Liang ZHANG ; Hong-En XIANG ; Xuan LUO ; Xu-Qiang WANG
National Journal of Andrology 2024;30(3):229-232
		                        		
		                        			
		                        			Objective:To examine the application of a novel pedagogical approach multidimensional supportive psychological intervention(MSPI)in the clinical practice teaching of andrological nursing care.Methods:Using the Hamilton Depression Scale(HAMD),we assessed the psychology of 100 nursing interns about to enter clinical practice in the Department of Andrology from De-cember 2021 to December 2022.We equally randomized the subjects into an experimental and a control group,the former receiving MSPI and the latter trained on the conventional teaching model without any psychological support intervention.Results:Compared with the baseline,the HAMD scores were significantly decreased in the experimental group after intervention(12.4±2.1 vs 8.9±2.4,P<0.01),but increased in the controls(13.1±1.8 vs 14.7±1.9,P<0.01);the skill scores dramatically increased in the experimental group(82.6±4.7 vs 91.2±2.4,P<0.01),but decreased in the control group after intervention(81.0±3.5 vs 80.4±2.7,P=0.28).Conclusion:MSPI can significantly enhance the learning enthusiasm of nursing students in a short period,re-duce their psychological stress and improve teaching outcomes.This approach,combining psychology with teaching,can also strength-en the mental resilience of nursing students and better confront them with future professional challenges.
		                        		
		                        		
		                        		
		                        	
2.Multicenter epidemiological characteristics of Mycoplasma pneumoniae infection in children in Hainan Province, 2012-2020
LIAO Shang-qiu ; TAN Hui ; ZHANG Xue-mei ; WAN Ke-cheng ; LU Xiong-fu ; ZHU Hou-cai ; YANG Zi-jiang ; ZHANG Yu-qing ; LIU Jia-yu ; TAN Xiao-yu ; DU Yu-ang ; BAI En-xu ; CAI Si-ming ; HUO Kai-ming
China Tropical Medicine 2023;23(5):511-
		                        		
		                        			
		                        			Abstract:  Objective To analyze the epidemiological characteristics (season, age, gender, mixed infection and clinical manifestations, etc.) of Mycoplasma pneumoniae (MP) infection in children in Hainan Province, so as to provide epidemiological evidence-based medical basis for the prevention and control of MP infection in children in Hainan Province. Methods The serum IgM antibodies of MP, Legionella pneumophila, Chlamydia pneumoniae, adenovirus, respiratory syncytial virus (RSV), Q fever Rickettsia, parainfluenza virus, influenza A virus and influenza B virus in children with respiratory tract infections (RTIs) who were hospitalized in pediatrics of many hospitals in Hainan Province from March 2012 to February 2020 were detected by indirect immunofluorescence method. The positive serum MP-IgM antibody was defined as MP infection. The epidemiological and clinical data of MP infected cases were analyzed retrospectively. Results From March, 2012 to February, 2020, a total of 35 731 qualified pediatric inpatients with RTIs in many hospitals in Hainan Province were tested for serum MP-IgM with the total positive rate of 39.12% (13 978/35 731). The yearly positive rates of MP-IgM from 2012 to 2020 were 48.39%, 56.23%, 56.62%, 47.04%, 29.71%, 24.14%, 47.55%, 36.84% and 24.46% respectively. The positive rates of MP-IgM in 2013 and 2014 were significantly higher than those in other years (P<0.05). The positive rate of MP-IgM in summer in Hainan Province was the highest (41.34%) and the lowest in winter (35.77%) (P<0.05). MP infection occurred in all age groups, the positive rate of MP-IgM in children of preschool (51.80%) was significantly higher than that in other age groups (P<0.01), and the positive rate of MP IgM in children of infancy (15.36%) was lower than that in other age groups (P<0.01). The positive rate of MP-IgM in female was 44.77%, which was significantly higher than that in male (35.83%) (P<0.05). MP infection combined with positive IgM of another pathogen accounted for 32.63% (4 561 cases), positive IgM of another two pathogens accounted for 1.26% (176 cases). MP infection was mostly found in pneumonia (68.73%), and the main clinical symptoms were cough (84.72%), fever (51.01%) and wheezing (3.16%). Conclusions MP is an important pathogen of respiratory tract infection in children in Hainan Province, and infection is more common in children in early school age and early childhood. Mp-specific tests should be performed to identify the pathogen in children suspected of MP infection. In the high incidence season, health education should be strengthened in kindergartens, schools and other places to prevent respiratory tract infection.
		                        		
		                        		
		                        		
		                        	
3.The application of intraoperative neurophysiological monitoring in selective dorsal neurotomy for primary premature ejaculation: a prospective single-center study.
Qing-Lai TANG ; Tao SONG ; You-Feng HAN ; Bai-Bing YANG ; Jian-Huai CHEN ; Zhi-Peng XU ; Chun-Lu XU ; Yang XU ; Wen YU ; Wei QIU ; Jiong SHI ; En-Si ZHANG ; Yu-Tian DAI
Asian Journal of Andrology 2023;25(1):137-142
		                        		
		                        			
		                        			Selective dorsal neurotomy (SDN) is a surgical treatment for primary premature ejaculation (PE), but there is still no standard surgical procedure for selecting the branches of the dorsal penile nerves to be removed. We performed this study to explore the value of intraoperative neurophysiological monitoring (IONM) of the penile sensory-evoked potential (PSEP) for standard surgical procedures in SDN. One hundred and twenty primary PE patients undergoing SDN were selected as the PE group and 120 non-PE patients were selected as the normal group. The PSEP was monitored and compared between the two groups under both natural and general anesthesia (GA) states. In addition, patients in the PE group were randomly divided into the IONM group and the non-IONM group. During SDN surgery, PSEP parameters of the IONM group were recorded and analyzed. The differences in PE-related outcome measurements between the perioperative period and 3 months' postoperation were compared for the PE patients, and the differences in effectiveness and complications between the IONM group and the non-IONM group were compared. The results showed that the average latency of the PSEP in the PE group was shorter than that in the normal group under both natural and GA states (P < 0.001). Three months after surgery, the significant effective rates in the IONM and non-IONM groups were 63.6% and 34.0%, respectively (P < 0.01), and the difference in complications between the two groups was significant (P < 0.05). IONM might be useful in improving the short-term therapeutic effectiveness and reducing the complications of SDN.
		                        		
		                        		
		                        		
		                        			Male
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Premature Ejaculation/surgery*
		                        			;
		                        		
		                        			Intraoperative Neurophysiological Monitoring/methods*
		                        			;
		                        		
		                        			Prospective Studies
		                        			;
		                        		
		                        			Neurosurgical Procedures/methods*
		                        			;
		                        		
		                        			Penis/surgery*
		                        			;
		                        		
		                        			Retrospective Studies
		                        			
		                        		
		                        	
4.The influence of family structure on depression and anxiety symptoms in adolescents: the mediating role of emotional neglect.
Xin-Xin HUANG ; Yu-Ting LI ; Jian-Hua CHEN ; Jing-Jing MA ; En-Zhao CONG ; Yi-Feng XU
Chinese Journal of Contemporary Pediatrics 2023;25(1):80-85
		                        		
		                        			OBJECTIVES:
		                        			To study the influence of family structure on depression and anxiety symptoms in adolescents and its mechanism.
		                        		
		                        			METHODS:
		                        			The cluster sampling method was used to select the students from seven middle schools in Shanghai, China. An online questionnaire survey was conducted using a self-made general status questionnaire, Childhood Trauma Questionnaire, Children's Depression Inventory, and Screen for Child Anxiety Related Emotional Disorders. The methods including one-way analysis of variance, chi-square test, binary logistic regression analysis, and mediating effect analysis were used to evaluate depression and anxiety symptoms in adolescents and the difference in childhood trauma and its mediating effect.
		                        		
		                        			RESULTS:
		                        			Compared with the adolescents from nuclear families, the adolescents from three-generation lineal families had a lower risk of depression symptoms (OR=0.794, 95%CI: 0.649-0.972, P<0.05), while those from host families had a higher risk of depression symptoms (OR=4.548, 95%CI: 1.113-18.580, P<0.05). The adolescents from inter-generational families and host families had a significantly higher score on the Childhood Trauma Questionnaire subscale of emotional neglect (P<0.05). Emotional neglect played a mediating role in the influence of inter-generational families and host families on depression symptoms in adolescents.
		                        		
		                        			CONCLUSIONS
		                        			Parents and grandparents have a certain positive effect in family structures. Separation from parents may make adolescents perceive more emotional neglect, which may increase the occurrence of depression symptoms.
		                        		
		                        		
		                        		
		                        			Child
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Adolescent
		                        			;
		                        		
		                        			Depression/epidemiology*
		                        			;
		                        		
		                        			Family Structure
		                        			;
		                        		
		                        			Child Abuse/psychology*
		                        			;
		                        		
		                        			China
		                        			;
		                        		
		                        			Anxiety/epidemiology*
		                        			;
		                        		
		                        			Surveys and Questionnaires
		                        			
		                        		
		                        	
5.Association between maternal job burnout and adolescent depression: the chain mediating effect of maternal depression and parenting style.
Yu-Ting LI ; Ying-Yan ZHONG ; Jian-Hua CHEN ; Xin-Xin HUANG ; En-Zhao CONG ; Yi-Feng XU
Chinese Journal of Contemporary Pediatrics 2023;25(2):186-192
		                        		
		                        			OBJECTIVES:
		                        			To investigate the association between maternal job burnout and adolescent depression and the mediating effect of maternal depression and parenting style.
		                        		
		                        			METHODS:
		                        			A cross-sectional study was conducted. The cluster random sampling method was used to select 2 572 adolescents from 7 middle schools in Shanghai, China, from April to May, 2021. A survey was performed for these adolescents and their mothers. The research tools included a general information questionnaire, Maslach Burnout Inventory-General Survey, Center for Epidemiologic Studies Depression Scale, short-form of Egna Minnen av Barndoms Uppfostran, and Children's Depression Inventory. A structural equation model was established, and the Bootstrap method was used to investigate the mediating effect.
		                        		
		                        			RESULTS:
		                        			The detection rate of depressive symptoms was 12.71% (327/2 572) among the adolescents. The scores of maternal job burnout, maternal depression, and negative parenting style were positively correlated with the score of adolescent depression (P<0.05), and the score of positive parenting style was negatively correlated with the score of adolescent depression (P<0.05). Maternal depression and parenting style played a mediating role between maternal job burnout and adolescent depression, including the individual mediating effect of maternal depression, the individual mediating effect of positive parenting style, and the chain mediating effect of maternal depression-negative/positive parenting style.
		                        		
		                        			CONCLUSIONS
		                        			Maternal job burnout may affect adolescent depression through the mediating effect of depression, parenting style, and depression-parenting style, suggesting that the symptoms of adolescent depression can be reduced by alleviating maternal job burnout, improving maternal depression, increasing positive parenting behaviors, and reducing negative parenting behaviors.
		                        		
		                        		
		                        		
		                        			Child
		                        			;
		                        		
		                        			Adolescent
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Cross-Sectional Studies
		                        			;
		                        		
		                        			Depression/etiology*
		                        			;
		                        		
		                        			Parenting
		                        			;
		                        		
		                        			China
		                        			;
		                        		
		                        			Burnout, Psychological
		                        			
		                        		
		                        	
6.Evaluation of three methods for detecting common carbapenemases
Lina SHAO ; Feng ZHAO ; Jia′en XU ; Shuilong ZHU ; Yunsong YU
Chinese Journal of Microbiology and Immunology 2023;43(10):763-768
		                        		
		                        			
		                        			Objective:To assess the performance of mCIM in combination with eCIM test as well as Carba-5 and Carba-R tests in detecting common carbapenemases in carbapenem-resistant organisms (CRO).Methods:In this study, 122 non-duplicate clinical CRO strains isolated in Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, from January 2019 to December 2020 were randomly selected. These strains were identified using matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS). A modified carbapenem inactivation test (mCIM combined with eCIM test), Carba-5 and Carba-R were used to detect the types of carbapenemases in these strains. PCR results were used as the gold standard to evaluate the performance of the three methods.Results:The 122 CRO strains belonged to 12 different species. PCR results showed that carbapenemases were produced in 112 strains. KPC-2-producing strains accounted for 57% (70/122), which included 46 Klebsiella pneumoniae strains, 12 Pseudomonas aeruginosa strains and 12 other strains. OXA-232-positive strains accounted for 15% (19/122), with Klebsiella pneumoniae being the only carrier (100%, 19/19). NDM carbapenemases were identified in 16% of the strains (20/122), with NDM-1 and NDM-5 accounting for 35% (7/20) and 65% (13/20), respectively, and Escherichia coli was the predominant carrier (60%, 12/20). IMP-4 was detected in one Klebsiella pneumoniae strain and one Enterobacter asteri strain. One Klebsiella pneumoniae strain produced KPC-2 and IMP-4, while none of the strains were found to produce VIM carbapenemases. In the remaining 10 strains, none of the above-mentioned carbapenemases were detected. Compared with the golden standard, the mCIM combined with eCIM test had a sensitivity of 95.65% (22/23), a specificity of 100% (90/90), a positive predictive value (PPV) of 100% (22/22), a negative predictive value (NPV) of 98.90% (90/91), and a diagnostic accuracy of 99.11% (112/113). The sensitivity, specificity, PPV, NPV and diagnostic accuracy of Carba-5 and Carba-R tests were all 100%. Conclusions:In general clinical microbiology laboratories, Carba-5 test could be used as an accurate method to quickly detect common carbapenemases in carbapenem-resistant Enterobacterales and Pseudomonas aeruginosa strains. In advanced laboratories, Carba-R test could also be used to monitor the colonization of carbapenem-resistant bacteria in patients. If the results of both Carba-5 and Carba-R tests were negative, mCIM combined with eCIM test was recommended.
		                        		
		                        		
		                        		
		                        	
7.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*
		                        			;
		                        		
		                        			Aggrecans/metabolism*
		                        			;
		                        		
		                        			Toll-Like Receptor 4/metabolism*
		                        			;
		                        		
		                        			RNA, Messenger/metabolism*
		                        			
		                        		
		                        	
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*
		                        			;
		                        		
		                        			Drowning/diagnosis*
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Liver
		                        			;
		                        		
		                        			Lung
		                        			;
		                        		
		                        			Microscopy, Electron, Scanning
		                        			;
		                        		
		                        			Multiplex Polymerase Chain Reaction
		                        			;
		                        		
		                        			Plankton/genetics*
		                        			
		                        		
		                        	
            
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