Objective To establish a brucellosis monitoring and testing technique applicable for the rapid field screening of natural epidemic diseases.Methods A rapid testing technique for Brucella was developed based on a double-antibody sandwich testing model using gradient-variant quantum dots as fluorescent tracers.The sensitivity,linearity,precision,and specificity of the technique were evaluated using suspensions of standard Brucella strains.Methodological comparisons across different sample types were conducted to assess the consistency of the test results.Results The gradient-variant quantum dots detection method was evaluated with standard Brucella strains,exhibiting a sensitivity of 1×103 CFU/mL and a linear correlation coefficient(r)of 0.994(95%CI,0.933-1.055).The maximum coefficient of variation was 12.94%in repeated tests,showing good specificity.A comparative assessment of 305 clinical samples was conducted using the Brucella gradient-variant quantum dots detection method,the Rose Bengal plate agglutination test(RBT),and the serum agglutination test(SAT),yielding a Kappa value of 0.95,indicating almost perfect agreement.Additionally,a comparative assessment of 110 environmental samples collected on-site was conducted using the Brucella gradient-variant quantum dots detection method and quantitative real-time PCR(qPCR).The Kappa values for aerosol collection fluid,surface wipes,and wool samples were all above 0.83,demonstrating near-perfect agreement.For fecal and soil samples,the Kappa values were above 0.62,indicating substantial agreement.Conclusion The Brucella detection method based on gradient-variant quantum dots technology is simple and can be conducted rapidly.The detection method demonstrates high sensitivity,linearity,precision,and specificity.It shows consistent performance in clinical sample testing.It is well-suited for field rapid screening of natural epidemic diseases in field settings and shows good application prospects in the monitoring,prevention,and rapid detection of zoonotic diseases.

Objective To retrieve,evaluate and summarize the relevant evidence on malnutrition management among maintenance hemodialysis(MHD)patients to provide clinical medical staff with evidence-based guidelines for managing malnutrition in MHD patients.Methods Using the"6S"pyramid model of evidence,We searched UpToDate,BMJ best clinical practice,the Australian JBI evidence-based health care centre database(JBI),Medive,the International Guidelines Collaborative Network(GIN),Agency for Healthcare Research and Quality Network,the UK National Institute of Clinical Medicine Guidance Library(NICE),Scottish Inter-College Guide Collaboration network,the Ontario Registered Nurses Association(RNAO),Guidelines Network of International Society of Nephrology,American Nephrology Foundation Guidenet,British Nephrology Society,Society of Nephrology,Chinese Medical Association,Improving Kidney Disease Outcomes Worldwide,International Society of Renal Nutrition and Metabolism,American Society for Parenteral Enteral Nutrition,European Society for Clinical Nutrition and Metabolism,Chinese Nutrition Society,PubMed,Web of Science,Embase,Cochrane Library,CNKI,Wanfang,VIP and CBM,to collect relevant guidelines,expert consensus,clinical decision,evidence summary,recommended practice,best practice,systematic evaluation and clinical practice,from the establishment to the date of April 10th,2023,for literature on malnutrition management of MHD patients.The literature included guidelines,expert consensuses,clinical decision-making studies,evidence summaries,recommended practices,best practices,and systematic reviews.Two researchers independently evaluated,extracted,and integrated the evidence.The evidence was graded by the evidence pre-grading system of the Evidence-based Healthcare Center of Joanna Briggs Institute(JBI).Results A total of 16 articles were included and summarized,comprising 5 guidelines,3 expert consensuses,1 clinical decision-making study,1 evidence summary,and 6 systematic reviews.Thirty-nine pieces of the best evidence were integrated,covering 5 key aspects(39 evidences):screening and assessment,nutritional requirements,nutritional supplement,other interventions,and monitoring and education.Conclusions The best evidence summary of malnutrition management among MHD patients in this study is scientifically rigorous and systematic.Clinical medical staff can use the best evidence to develop personalized malnutrition management programs for MHD patients.

Objective:To analyze the surveillance results of human brucellosis in Qinghai Province, to study the epidemic characteristics of brucellosis, and to provide scientific basis for formulating brucellosis prevention and control strategies and measures.Methods:By using descriptive epidemiological method, surveillance data from 4 national and 26 provincial brucellosis surveillance sites in Qinghai Province in 2022 and brucellosis related information from the "Disease Surveillance Information Reporting and Management System" in 2022 were collected and summarized. The population, time, regional distribution and epidemic characteristics of brucellosis in Qinghai Province were analyzed.Results:In 2022, a total of 12 483 people were monitored at 4 national and 26 provincial brucellosis surveillance sites. In Rose Bengal plate agglutination test (RBPT), 714 patients were positive, and the positive rate was 5.72% (714/12 483). In tube agglutination test (SAT), 508 individuals tested positive, and the positive rate was 4.07% (508/12 483). There were 1 156 reported cases in 2022, including 910 males and 246 females, with a gender ratio of 3.70 ∶ 1.00. The age range was mainly between 30 and 59 years old, accounting for 77.68% (898/1 156). Most of them were farmers engaged in breeding and transportation, accounting for 81.40% (941/1 156). The onset time was concentrated from June to August, accounting for 50.26% (581/1 156). The distribution area was mainly in the northeast of Qinghai Province (Haibei Tibetan Autonomous Prefecture, Xining City, Haidong City), accounting for 86.33% (998/1 156).Conclusions:The epidemic of human brucellosis in Qinghai Province is still relatively serious, especially in the northeastern agricultural area. Comprehensive measures should be taken to further curb the outbreak of human brucellosis.

Objective:To analyze the surveillance results of human brucellosis in Qinghai Province, to study the epidemic characteristics of brucellosis, and to provide scientific basis for formulating brucellosis prevention and control strategies and measures.Methods:By using descriptive epidemiological method, surveillance data from 4 national and 26 provincial brucellosis surveillance sites in Qinghai Province in 2022 and brucellosis related information from the "Disease Surveillance Information Reporting and Management System" in 2022 were collected and summarized. The population, time, regional distribution and epidemic characteristics of brucellosis in Qinghai Province were analyzed.Results:In 2022, a total of 12 483 people were monitored at 4 national and 26 provincial brucellosis surveillance sites. In Rose Bengal plate agglutination test (RBPT), 714 patients were positive, and the positive rate was 5.72% (714/12 483). In tube agglutination test (SAT), 508 individuals tested positive, and the positive rate was 4.07% (508/12 483). There were 1 156 reported cases in 2022, including 910 males and 246 females, with a gender ratio of 3.70 ∶ 1.00. The age range was mainly between 30 and 59 years old, accounting for 77.68% (898/1 156). Most of them were farmers engaged in breeding and transportation, accounting for 81.40% (941/1 156). The onset time was concentrated from June to August, accounting for 50.26% (581/1 156). The distribution area was mainly in the northeast of Qinghai Province (Haibei Tibetan Autonomous Prefecture, Xining City, Haidong City), accounting for 86.33% (998/1 156).Conclusions:The epidemic of human brucellosis in Qinghai Province is still relatively serious, especially in the northeastern agricultural area. Comprehensive measures should be taken to further curb the outbreak of human brucellosis.

To explore the effect of doctor-patient relationship perception on work performance among medical staff in public hospitals and its mechanism. The convenient sampling method was used to select 380 medical staff working in four public tertiary hospitals in Sichuan Province, Zhejiang Province, and Fujian Province from August 2022 to October 2022 as the research objects, and the General Information Questionnaire, Doctor-Patient Relationship Scale, General Self-Efficacy Scale, Perceived Organizational Support Scale, Work Performance Questionnaire were used. This paper showed that the doctor-patient relationship perception of medical staff was negatively correlated with self-efficacy (r=-0.392, P<0.01) and work performance (r=-0.286, P<0.01), self-efficacy was positively correlated with perceived organizational support (r=0.538, P<0.01) and work performance (r=0.507, P<0.01), perceived organizational support was positively correlated with work performance (r=0.510, P<0.01). Self-efficacy played a partial mediating role between doctor-patient relationship perception and work performance, and its effect value was -0.241, accounting for 64.78% of the total effect. Perceived organizational support weakened the negative predictive effect of doctor-patient relationship perception on self-efficacy, which moderates the first half path of the mediating model that doctor-patient relationship perception affects work performance through self-efficacy. It indicated that the doctor-patient relationship perceived by medical staff in public hospitals is poor. Measures should be taken from the aspects of policy support, hospital and society levels to alleviate the doctor-patient relationship, play the mediating role of self-efficacy and the moderating role of organizational support, minimize the negative impact of doctor-patient relationship on the work performance among medical staff, and improve the work performance of medical staff, so as to improve the overall quality of medical services.

Objective:To observe multiple locus variable-number tandem repeat analysis (MLVA) typing of Brucella isolated from Himalayan marmot in Qinghai-Tibet Plateau of Qinghai Province, and to explore the relationship between the strains and strains previous isolated from Qinghai Province. Methods:Blood samples of Himalayan marmot were collected in Qinghai-Tibet Plateau of Qinghai Province from March 2019 to October 2020. Pathogens were isolated and cultured from Brucella antibody positive samples identified by using the rose bengal test (RBT). Conventional biological methods and molecular biological methods (BCSP31-PCR and AMOS-PCR) were used for strain identification. At the same time, MLVA method was used to genotype the isolated strains, and cluster analysis was used to analyze the genetic relationships between the strains based on the genotype of 70 Brucella isolated from different hosts in Qinghai Province. Results:A total of 1 466 blood samples of Himalayan marmot were collected from Qinghai-Tibet Plateau. Two strains of Brucella were isolated and cultured from 64 RBT-positive samples, named QH2013054 and QH2013062, respectively. They were identified as Brucella ovis biotype Ⅲ by conventional and molecular biological methods. The MLVA genotyping results showed that QH2013054 and QH2013062 were different at the Bru16 locus, indicating different MLVA genotypes. Cluster analysis showed that strain QH2013054 had the same MLVA genotype as 7 strains, among which 6 strains were from 3 farmers and 3 sheep from the same family in Gonghe County, and 1 strain was from a farmer in Menyuan Hui Autonomous County. The strain QH2013062 had the same MLVA genotype as 4 strains, including 3 strains from 3 farmers in Menyuan Hui Autonomous County and 1 strain from a farmer in Tu Autonomous County of Huzhu. Conclusions:The strains of Brucella isolated from Himalayan marmot in Qinghai-Tibet Plateau of Qinghai Province have the same MLVA genotype as some strains of Brucella isolated from humans and sheep in Qinghai Province. It is speculated that the host humans, sheep and Himalayan marmot in Qinghai-Tibet Plateau may have a common source of infection.

Objective:To learn about the epidemic situation and trend of human brucellosis in Menyuan Hui Autonomous County (referred to as Menyuan County) of Qinghai Province, and to provide reference for formulating brucellosis prevention and control measures in Menyuan County.Methods:Data on human brucellosis in Menyuan County reported by the Infectious Disease Reporting Information Management System of China Disease Control and Prevention Information System from 2013 to 2020 were collected and analyzed by descriptive epidemiological analysis (three distribution).Results:A total of 186 cases of brucellosis were confirmed from 2013 to 2020, with an average annual incidence of 14.553/100 000. The annual incidence rate was increasing year by year(χ 2trend = 22.08, P = 0.002). The cases were distributed in 67 villages of 12 towns; cases were more common in the age group of 15-< 65 years old (96.24%, 179/186), and there were more men than women cases (sex ratio was 3.89∶1.00, 148/38). Conclusions:The incidence rate of brucellosis cases in Menyuan County is increasing year by year, and the scope of its impact is constantly expanding. A multi-sectoral joint prevention and control mechanism should be established to strengthen management, increase the prevention and control of brucellosis, and stop the spread of the epidemic to surrounding counties and cities.

OBJECTIVE：To i nvestigate the metabolism stabilities of novel hypoglycemic compound LSM- 13 in rat liver microsomes，and to analyze the possible metabolites. METHODS ：LSM-13 was dissolved in rat liver microsome incubation system initiated by reduced nicotinamide adenine dinucleotide phosphate ，and was incubated in water at 37 ℃. The reaction was terminated with acetonitrile at 0，5，10，15，30，45 and 60 min，respectively. Using indomethacin as internal standard ，the concentration of LSM-13 in incubation system was determined by HPLC. The residual percentage and enzyme kinetic parameters of LSM- 13 were calculated at different incubation time points with the concentration of LSM- 13 incubated for 0 min as reference. UPLC-Q-TOF/MS was used to analyze and speculate the metabolites of LSM- 13 in rat liver microsomes. RESULTS ：After 60 min incubation ，the remaining percentage of LSM- 13 was（56.07±0.95）％，the half-life was 42.78 min，and the intrinsic clearance was 0.032 4 mL/（min·mg）. Compared with total ion flow diagram of rat liver microsome blank samples ，three chromatographic peaks were added in the samples incubated for 60 min；the corresponding molecular ion peaks were m/z 505.133 8，417.102 4，293.111 7 [M+H]+；the possible metabolites may be dehydrogenation ，O-debentylation and hydrolysis products of LSM- 13. CONCLUSIONS ： The compound LSM- 13 has moderate stability in rat liver microsomes ，and may undergo dehydrogenation ，O-debentylation and hydrolysis.

Objective:The epidemic regularity and trend of human brucellosis in Qinghai Province were analyzed to provide basis for formulating more perfect prevention and control measures.Methods:Using descriptive epidemiological methods, the data of brucellosis reported cases in Qinghai Province from 2005 to 2018 (from the Infectious Disease Report Information Management System of the China Disease Prevention and Control Information System) were collected, and the three distributions (time, region and population distributions) of human brucellosis were statistically described and analyzed.Results:From 2005 to 2018, a total of 418 cases were reported in Qinghai Province, with a incidence of 0.05/100 000, the incidence of different years was statistically different (χ 2 = 11.63, P < 0.05). The incidence of brucellosis remained at a low level from 2005 to 2010, ranged from 0 to 0.05/100 000; and the incidence increased from 2011 to 2018, ranged from 0.27/100 000 to 2.06/100 000. There were reported cases of brucellosis throughout the year, and the onset time was mainly from April to June, accounting for 42.82% (179/418). The 418 cases were distributed in 20 counties (cities, districts), among which the top 5 incidence rates were Menyuan County (15.31%, 64/418), Henan County (13.40%, 56/418), Tianjun County (13.16%, 55/418), Xining City (12.44%, 52/418), and Haiyan County (7.66%, 32/418). In the population distribution, brucellosis cases in the age group from 40 to 49 years old were the most, accounting for 32.78% (137/418), the male to female ratio was 1.58 ∶ 1.00 (256∶162) . And the occupational distribution was dominated by herdsmen, accounting for 57.18% (239/418). Conclusions:The epidemic situation of brucellosis in Qinghai Province is on the rise. It should be strengthened the population monitoring and notification of outbreaks, and health education for all should be implemented.

OBJECTIVE：To investigate th e stabilities of antitumor candid ate Gedatolisib in plasma in vitro and simulated gastric/intestinal fluids ，and to analyze the possible catabolites in plasma. METHODS ：HPLC method was adopted. Using indometacin as internal standard ，the contents of Gedatolisib incubated in plasma of SD rats （male）for 0，0.5，1.0，1.5，2.0，3.0 h and blank simulated gastric fluid （pH 1.3，no enzyme ），blank simulated intestinal fluid （pH 6.8，no enzyme ），simulated gastric fluid（pH 1.3，containing pepsin ）and simulated intestinal fluid （pH 6.8，containing trypsin ）for 0，0.5，1.0，2.0，3.0，4.0，6.0 h were determined. The remaining percentage of Gedatolisib was calculated. UPLC-Q-TOF/MS was used to analyze the TIC of blank plasma and incubated samples. The differential peaks were compared， and catabolites were inferred by MS 1Z073）.gzwjkj2019-1- chromatograms. RESULTS ： The remaining percentage in plasma of rats for 2.0 h was about 63％，and there was nosignificant change after continued incubation. The remaining percentage of Gedatolisib incubated in blank simulated intestinal fluid for different time ranged （99.18 ± 2.15）％ -（103.20 ± 3.41）％ . The remaining percentage in simulated com intestinal fluids for 2.0 h ranged （88.76 ± 1.53）％ . The remaining percentage in blank simulated gastric fluids for 2.0 h was ranged （85.63±1.55）％，and there was no significant change after continued incubation. The remaining percentage in simulated gastric fluid was from （94.94±3.52）％（0 h）to（16.19±1.17）％ （6.0 h）. TIC of UPLC-Q-TOF/MS showed that the differential peaks of incubated samples and blank plasma was 6.42 min under positive mode scanning ，molecular ion peak of m/z 616.335 1，simulated 632.327 7，630.317 0，602.278 6 [M+H]+ could be found in scanning channel. It was speculated that Gedatolisib could generate 1-（4-（3-（4，6-dimorpholino-1，3，5-triazin-2-yl）phenyl）urea） benzoyl）-N，N-dimethylpiperidin-4-amine oxide ，1-（4-（4-（dimethylamino）piperidine-1-carbonyl）phenyl）-3-（4-（4-morpholino-6- （3-oxomorpholino）-1，3，5-triazin-2-yl）phenyl）urea and 1-（4-（3-（4-（4，6-dimorpholino-1，3，5-triazin-2-yl）phenyl）urea） benzoyl）-N-methylpiperidine. CONCLUSIONS ：Gedatolisib is not stable in rat plasma ，and it may undergo terminal N oxidation， morpholine ring oxidation and terminal N demethylation. Gedatolisib is stable in artificial intestinal fluid and blank artificial gastric/ intestinal fluid ，and degrades obviously in the presence of pepsin.