OBJECTIVE To explore the application of digital twin technology in modeling and simulating the hospi-tal-associated transmission pathways of multidrug-resistant organisms(MDROs)and propose MDRO transmis-sion prevention and control strategies based on digital twins.METHODS Real-time hospital data and person-nel mobility information from Jun.2023 to Jun.2024 were collected and analyzed.A dynamic model of the hospi-tal's internal environment and MDROs transmission was established by digital modeling and 3D simulation tech-nology of the hospital environment.A simulation platform was utilized to analyze the impact of different preven-tion and control measures on MDROs transmission risks.Digital twin technology was employed for predicting and real-time monitoring of organism transmission pathways.RESULTS Simulation data showed that under initial pre-vention and control conditions,Ward A had 8 infected individuals and a transmission duration of 12 days.Af-ter implementing comprehensive measures of"increased cleaning frequency+enhanced personnel protection",the number of infected individuals reduced to 4,the transmission duration shortened to 6 days and the transmis-sion risk reduction rate reached 45.00％.The digital twin model can effectively reflect the transmission patterns of MDROs within the hospital and provide quantitative risk assessments under different prevention and control strat-egies.CONCLUSIONS Digital twin technology can predict and simulate organism transmission pathways in real-time,providing scientific decision-making support for hospitals.It has the potential to become a new paradigm for MDROs prevention and control.

OBJECTIVE To explore the application of digital twin technology in modeling and simulating the hospi-tal-associated transmission pathways of multidrug-resistant organisms(MDROs)and propose MDRO transmis-sion prevention and control strategies based on digital twins.METHODS Real-time hospital data and person-nel mobility information from Jun.2023 to Jun.2024 were collected and analyzed.A dynamic model of the hospi-tal's internal environment and MDROs transmission was established by digital modeling and 3D simulation tech-nology of the hospital environment.A simulation platform was utilized to analyze the impact of different preven-tion and control measures on MDROs transmission risks.Digital twin technology was employed for predicting and real-time monitoring of organism transmission pathways.RESULTS Simulation data showed that under initial pre-vention and control conditions,Ward A had 8 infected individuals and a transmission duration of 12 days.Af-ter implementing comprehensive measures of"increased cleaning frequency+enhanced personnel protection",the number of infected individuals reduced to 4,the transmission duration shortened to 6 days and the transmis-sion risk reduction rate reached 45.00％.The digital twin model can effectively reflect the transmission patterns of MDROs within the hospital and provide quantitative risk assessments under different prevention and control strat-egies.CONCLUSIONS Digital twin technology can predict and simulate organism transmission pathways in real-time,providing scientific decision-making support for hospitals.It has the potential to become a new paradigm for MDROs prevention and control.

Objective To explore the mechanism of Gusong Yigu Decoction(inchuding Astragali Radix,Codonpsis Radix,Angelicae Sinensis Radix,etc.)in the treatment of postmenopausal osteoporosis(PMOP)based on network pharmacology and animal experiment.Methods The effective ingredients and corresponding targets of Gusong Yigu Decoction were collected by using TCMSP database.GeneCards,TTD,and other databases were used to collect PMOP target proteins.R language was used to obtain the intersection targets and draw Wayne diagram.STRING database was used for the establishment of protein-protein interaction network.At last,GO function enrichment and KEGG pathway enrichment were performed on all common targets.The ovariectomized SD rats were used in the animal experiment.Gusong Yigu Decoction was administered by gavage for 12 weeks.The changes of bone histomorphology were detected by HE staining,the mRNA and protein levels of phosphatidylinositol 3-kinase(PI3K)and protein kinase B(Akt)in bone tissue of proximal tibial were tested by qRT-PCR and Western Blot,respectively.Results A total of 91 effective ingredients of Gusong Yigu Decoction in the treatment of PMOP,70 common targets of drugs-diseases were obtained.GO enrichment analysis mainly included DNA-binding transcription activator activity,RNA polymerase II-specific,ubiquitin protein ligase binding.KEGG pathway enrichment analysis included PI3K/Akt signaling pathway,TNF signaling pathway,and apoptosis.The animal experiment showed that bone histomorphology was significantly improved,meanwhile the mRNA and protein expressions of PI3K and Akt were significantly increased in Gusong Yigu Decoction group(P＜0.01).Conclusion Gusong Yigu Decoction may improve bone microstructure through multiple channels and targets.Gusong Yigu Decoction can increase the number and thickness of bone trabeculae and reduce the separation of bone trabeculae by activating PI3K/Akt signaling pathway,and thus play an anti-osteoporosis role in postmenopausal osteoporosis.

OBJECTIVE:To improve HPLC for content determination of ketoprofen in Ketoprofen enteric-coated capsules. METHODS:HPLC method was adopted. The determination was performed on Chiralpak IC column with mobile phase consisted of n-hexane (0.1% TFA)-isopropanol(90:10,V/V)at a flow rate of 0.8 mL/min. The detection wavelength was set at 268 nm,and column temperature was 25 ℃. The sample size was 10 μL. RESULTS:The linear range of ketoprofen were 0.025-0.5 mg/mL(r=0.9998). The limit of quantitation was 1.0 mg/L,and limit of detection was 0.2 mg/L. RSDs of precision,stability and reproduc-ibility tests were lower than 2%;recoveries were 96.36%-100.32%(RSD=1.87%,n=6). CONCLUSIONS:The method is sim-ple,accurate and rapid,and can be used for the content determination of ketoprofen in Ketoprofen enteric-coated capsules.

Objective: To develop a stable and simple method to measure the content of aloe oligosaccharides. Methods: After the conversion coefficient of aloe oligosaccharides to glucose was obtained, the content of aloe oligosaccharides was measured by phenol sulfuric acid method. Results: The correlation coefficient of standard curve is 0.9993, the recovery rate is 95.3% and RSD is 1.23%. Conclusion: The method can be applied to aloe and aloe products.