Objective:To investigate the host and vector composition of pestis and the epidemic situation of pestis among animals in the border port areas of Longchuan County, Yunnan Province.Methods:In September 2022, a survey was conducted on rodents and their surface parasitic fleas in the border port areas of Longchuan County, according to three habitat types: residential areas, agricultural areas, and forest-shrubbery areas. Samples of murine animals organs and their surface parasitic fleas were collected for isolation and identification of Yersinia pestis. Blood samples of plague indicating animals, such as murine animals, dogs and cats were collected, and serum plague F1 antibody was detected by indirect hemagglutination assay. Meanwhile, a retrospective investigation was conducted on the occurrence of self dead rats, sick rats, and suspected cases in the local area from 2018 to 2022 through interviews with farmers. Results:A total of 168 murine animals belonging to 3 orders, 5 families, 10 genera, and 11 species were captured in three habitats in Longchuan County. Among them, the capture rate in residential areas was 5.00% (30/600), with Rattus tanezumi and Suncus murinus as dominant species, with a composition ratio of 50.00% (15/30). The capture rate in agricultural areas was 9.67% (122/1 262), with Rattus tanezumi and Suncus murinus as dominant species, with a composition ratio of 50.82% (62/122) and 44.26% (54/122), respectively. The capture rate in the forest-shrubbery areas was 6.25% (16/256), with Hylomys suillus and Eothenomys eleusis as dominant species, with a composition ratio of 37.50% (6/16) and 31.25% (5/16), respectively. Among the captured murine animals, 20 individuals carried 52 parasitic fleas, belonging to 2 species of 2 genera and 2 families. The total flea infection rate was 11.90% (20/168), and the total flea index was 0.31 (52/168). The dominant specie was Xenopsylla cheopis (90.38%, 47/52). The flea infection rate in residential areas was 33.33% (10/30), and the flea index was 1.23 (37/30). The flea infection rate in agricultural areas was 7.38% (9/122), and the flea index was 0.11 (14/122). The flea infection rate in the forest-shrubbery areas was 6.25% (1/16), and the flea index was 0.06 (1/16). The samples of murine animals and their parasitic fleas obtained were isolated and cultured by Yersinia pestis, and the results were negative. A total of 144 serum samples from murine animals, dogs and cats were separated, and no F1 antibody against pestis was detected. According to interviews and investigations, no abnormal situations such as a large number of self dead rats, sick rats, and suspected cases were found from 2018 to 2022. Conclusions:No plague epidemic has been found in the border port areas of Longchuan County recently. The main host of plague, Rattus tanezumi, and the main vector, Xenopsylla cheopis, remain the dominant species in this area.

Objective:To investigate the host and vector composition of pestis and the epidemic situation of pestis among animals in the border port areas of Longchuan County, Yunnan Province.Methods:In September 2022, a survey was conducted on rodents and their surface parasitic fleas in the border port areas of Longchuan County, according to three habitat types: residential areas, agricultural areas, and forest-shrubbery areas. Samples of murine animals organs and their surface parasitic fleas were collected for isolation and identification of Yersinia pestis. Blood samples of plague indicating animals, such as murine animals, dogs and cats were collected, and serum plague F1 antibody was detected by indirect hemagglutination assay. Meanwhile, a retrospective investigation was conducted on the occurrence of self dead rats, sick rats, and suspected cases in the local area from 2018 to 2022 through interviews with farmers. Results:A total of 168 murine animals belonging to 3 orders, 5 families, 10 genera, and 11 species were captured in three habitats in Longchuan County. Among them, the capture rate in residential areas was 5.00% (30/600), with Rattus tanezumi and Suncus murinus as dominant species, with a composition ratio of 50.00% (15/30). The capture rate in agricultural areas was 9.67% (122/1 262), with Rattus tanezumi and Suncus murinus as dominant species, with a composition ratio of 50.82% (62/122) and 44.26% (54/122), respectively. The capture rate in the forest-shrubbery areas was 6.25% (16/256), with Hylomys suillus and Eothenomys eleusis as dominant species, with a composition ratio of 37.50% (6/16) and 31.25% (5/16), respectively. Among the captured murine animals, 20 individuals carried 52 parasitic fleas, belonging to 2 species of 2 genera and 2 families. The total flea infection rate was 11.90% (20/168), and the total flea index was 0.31 (52/168). The dominant specie was Xenopsylla cheopis (90.38%, 47/52). The flea infection rate in residential areas was 33.33% (10/30), and the flea index was 1.23 (37/30). The flea infection rate in agricultural areas was 7.38% (9/122), and the flea index was 0.11 (14/122). The flea infection rate in the forest-shrubbery areas was 6.25% (1/16), and the flea index was 0.06 (1/16). The samples of murine animals and their parasitic fleas obtained were isolated and cultured by Yersinia pestis, and the results were negative. A total of 144 serum samples from murine animals, dogs and cats were separated, and no F1 antibody against pestis was detected. According to interviews and investigations, no abnormal situations such as a large number of self dead rats, sick rats, and suspected cases were found from 2018 to 2022. Conclusions:No plague epidemic has been found in the border port areas of Longchuan County recently. The main host of plague, Rattus tanezumi, and the main vector, Xenopsylla cheopis, remain the dominant species in this area.

Objective To explore the anti-inflammatory mechanism of Tong-Xie-Yao-Fang's intervention on irritable bowel syndrome with diarrhea(IBS-D),the effects of Tong-Xie-Yao-Fang on farnesol receptor(FXR),nuclear factor-κB(NF-κB)and inflammatory factors in IBS-D model rats were observed.Methods Healthy SD rats were randomly divided into blank group(Control group),model group(Model group),low-dose group of Tong-Xie-Yao-Fang(TXYF-L group,4.977 g/kg),middle-dose group of Tong-Xie-Yao-Fang(TXYF-M group,9.954 g/kg),and high-dose group of Tong-Xie-Yao-Fang(TXYF-H group,19.908 g/kg),Pivium bromide group(PWXA group,0.018 g/kg),with 10 rats in each group.Except for the blank group,the IBS-D rat models of liver depression and spleen deficiency were established by chronic restraint stress and senna intragastric administration.After the model was successfully established,the intervention was continued for 14 days according to the corresponding group treatment method.The general situation,diarrhea rate,fecal moisture content,water injection when abdominal wall retraction reflex reaches 3 scores,sugar water preference rate and serum D-xylose level were observed.The morphological and structural changes of rat colon were observed by HE staining.The expression of FXR gene in colon tissue was detected by real-time fluorescence quantitative PCR,the expression of FXR protein and NF-κB protein in colon tissue was detected by protein Western blot,and the levels of serum IL-6,IL-8 and TNF-α were detected by ELISA.Results After the treatment of Tong-Xie-Yao-Fang,the weight of each dosage group of Tong-Xie-Yao-Fang increased,the fecal water content decreased,the sugar water preference rate increased,the water injection volume increased when the rats reached the third grade of abdominal retraction reflex score,the serum D-xylose content increased and the food intake increased.HE staining showed that villous or finger-like structures appeared in the mucosal epithelium of model group,and inflammatory cells infiltrated in the upper mucosa.After treatment,the mucosal epithelium in TXYF-M group was smooth,villous or finger-like structures disappeared,and the infiltration degree of inflammatory cells decreased.Compared with the model group,the expression of FXR mRNA and FXR protein in the colon tissue of rats in the high-dose group of Tong-Xie-Yao-Fang increased significantly,while the concentration of IL-6,IL-8 and TNF-α in serum and the expression of NF-κB protein in the colon tissue of rats in the high-dose group of Tong-Xie-Yao-Fang decreased.Conclusion The mechanism of Tong-Xie-Yao-Fang in treating low-grade inflammation of IBS-D intestinal mucosa may be related to activating the expression of FXR in colon,inhibiting the expression of NF-κB in colon tissue,and then reducing the concentration of pro-inflammatory factors IL-6,IL-8 and TNF-α in serum.

Objective To explore the anti-inflammatory mechanism of Tong-Xie-Yao-Fang's intervention on irritable bowel syndrome with diarrhea(IBS-D),the effects of Tong-Xie-Yao-Fang on farnesol receptor(FXR),nuclear factor-κB(NF-κB)and inflammatory factors in IBS-D model rats were observed.Methods Healthy SD rats were randomly divided into blank group(Control group),model group(Model group),low-dose group of Tong-Xie-Yao-Fang(TXYF-L group,4.977 g/kg),middle-dose group of Tong-Xie-Yao-Fang(TXYF-M group,9.954 g/kg),and high-dose group of Tong-Xie-Yao-Fang(TXYF-H group,19.908 g/kg),Pivium bromide group(PWXA group,0.018 g/kg),with 10 rats in each group.Except for the blank group,the IBS-D rat models of liver depression and spleen deficiency were established by chronic restraint stress and senna intragastric administration.After the model was successfully established,the intervention was continued for 14 days according to the corresponding group treatment method.The general situation,diarrhea rate,fecal moisture content,water injection when abdominal wall retraction reflex reaches 3 scores,sugar water preference rate and serum D-xylose level were observed.The morphological and structural changes of rat colon were observed by HE staining.The expression of FXR gene in colon tissue was detected by real-time fluorescence quantitative PCR,the expression of FXR protein and NF-κB protein in colon tissue was detected by protein Western blot,and the levels of serum IL-6,IL-8 and TNF-α were detected by ELISA.Results After the treatment of Tong-Xie-Yao-Fang,the weight of each dosage group of Tong-Xie-Yao-Fang increased,the fecal water content decreased,the sugar water preference rate increased,the water injection volume increased when the rats reached the third grade of abdominal retraction reflex score,the serum D-xylose content increased and the food intake increased.HE staining showed that villous or finger-like structures appeared in the mucosal epithelium of model group,and inflammatory cells infiltrated in the upper mucosa.After treatment,the mucosal epithelium in TXYF-M group was smooth,villous or finger-like structures disappeared,and the infiltration degree of inflammatory cells decreased.Compared with the model group,the expression of FXR mRNA and FXR protein in the colon tissue of rats in the high-dose group of Tong-Xie-Yao-Fang increased significantly,while the concentration of IL-6,IL-8 and TNF-α in serum and the expression of NF-κB protein in the colon tissue of rats in the high-dose group of Tong-Xie-Yao-Fang decreased.Conclusion The mechanism of Tong-Xie-Yao-Fang in treating low-grade inflammation of IBS-D intestinal mucosa may be related to activating the expression of FXR in colon,inhibiting the expression of NF-κB in colon tissue,and then reducing the concentration of pro-inflammatory factors IL-6,IL-8 and TNF-α in serum.

Objective To investigate the influencing factors of adverse pregnancy outcomes in patients with preeclampsia and the predictive value of serum trace elements in the second trimester.Methods A total of 98 patients with preeclampsia admitted to Qujing First People's Hospital from January 2019 to June 2022 were enrolled in the study.Patients were divided into poor outcome group and good outcome group according to whether they had adverse pregnancy outcomes.The clinical data of all patients enrolled in the study were col-lected and the serum levels of trace elements calcium,copper,zinc and iron were detected in the second trimes-ter.Univariate analysis and multivariate Logistic regression were used to analyze the influencing factors of ad-verse pregnancy outcomes in patients with preeclampsia.The levels of serum trace elements in the second tri-mester of pregnancy were compared between the poor outcome group and the good outcome group.The re-ceiver operating characteristic(ROC)curve was used to evaluate the predictive value of serum trace elements calcium,copper,zinc and iron for adverse pregnancy outcomes in patients with preeclampsia.Results Univari-ate analysis showed that compared with the good outcome group,the poor outcome group had significantly higher systolic blood pressure,24 h urinary protein quantitation,and D-dimer level(P＜0.05)and significantly less gestational age and platelet count at admission(P＜0.05).Multivariate Logistic regression analysis showed that 24 h urinary protein quantification,D-dimer and platelet count were the influencing factors of ad-verse pregnancy outcomes in patients with preeclampsia(P＜0.05).The levels of serum trace elements calci-um,copper,and zinc in the poor outcome group were significantly lower than those in the good outcome group(P＜0.05),and the level of iron was significantly higher than that in the good outcome group(P＜0.05).ROC curve analysis showed that the areas under the curves(AUCs)of serum calcium,copper,zinc,and iron in the second trimester of pregnancy for predicting adverse pregnancy outcomes in preeclampsia patients were 0.830(95％CI:0.780-0.880),0.855(95％CI:0.805-0.905),0.847(0.797-0.897)and 0.861(95％CI:0.811-0.911),respectively.Conclusion Adverse pregnancy outcomes in patients with preeclampsia are re-lated to 24 h urine protein,D-dimer and platelet count.The levels of serum trace elements calcium,copper,zinc and iron in the second trimester of pregnancy change significantly in patients with adverse pregnancy out-comes,which may become predictive markers of adverse pregnancy outcomes.

The core competencies of Operating Room specialist nurses are the key to being competent in Operating Room nursing work. However, the core competencies that Operating Room specialist nurses should possess in China are not yet clear, and there is no unified and standardized training model. This paper summarizes the concepts, core competency standards, and training models of Operating Room specialist nurses, explores the existing problems in admission conditions, curriculum arrangement, training content, training methods, and assessment of Operating Room specialist nurses, and puts forward suggestions for the training of Operating Room specialist nurses in China, in order to promote the improvement of core competency of Operating Room specialist nurses and the homogenization and standardization of training models.

Objective To understand the epidemic status of biological stings on an island and the knowledge about environmental emergencies of personnel stationed on the island.Methods With convenience sampling,we investigated 270 personnel using a self-designed anonymous questionnaire based on clinical treatment situation and on-the-spot investigation of the island.Results A total of 270 questionnaires were distributed,and 254 valid questionnaires were returned,with an effective rate of 94.07％.A total of 164(64.57％)personnel had a history of stings,with median times of 2(0,5).The main clinical symptoms were local swelling and pain(142 cases,86.59％)and pruritus(110 cases,67.07％).The personnel scored 14(11,17)for the first aid knowledge about island environmental emergencies(the full score was 26).The vast majority of personnel(227 cases,89.37％)believed that it was necessary to learn the knowledge about island environmental emergencies,and the majority of personnel(186 cases,73.23％)hoped to learn through centralized teaching.Conclusion The environmental emergencies represented by biological stings are becoming increasingly serious,so it is necessary to carry out multiple prevention and environmental control measures,and to carry out regular and long-term training for personnel stationed on islands.

Receptors, Purinergic ; Signal Transduction/physiology*

Objective: To analyze the status of sleep disorders and their influencing factors among Tibetan secondary school students in high altitude areas in China, so as to provide a reference for the improvement and intervention of sleep quality among Tibetan secondary school students in high altitude areas. Methods: From April to July, 2022, a questionnaire survey on demographic factors, sleep disorders, and lifestyle was conducted on 5 486 Tibetan secondary school students in the Lhasa, Shigatse, and Nagqu regions of Tibet, China, using stratified whole-group sampling. Descriptive statistics and Logistic regression analysis were used to analyze the sleep disorders of Tibetan secondary school students and their influencing factors. Results: The average score of PSQI for Tibetan secondary school students at high altitude was (5.67±3.23), and the detection rate of sleep disorders (PSQI>7) was 24.72% . There were significant differences in the prevalence of sleep disorders among different grades ( χ 2=23.95, P <0.01). Logistic regression analysis showed that interpersonal sensitivity, depression, anxiety, academic stress, falling asleep after midnight, sleep environment, and parental sleep disorders were positively associated with the occurrence of sleep disorders among Tibetan secondary school students ( OR =2.74, 1.68, 2.62, 1.32, 2.02, 1.85, 2.61, 1.31, 2.19, 2.88, 4.91, 2.94, 2.51, 1.36, P <0.05). Conclusion Tibetan secondary school students in high altitude areas have poor sleep quality and widespread sleep disorder problems, which should be given intervention and improvement. Schools and families should give secondary school students more guidance on appropriate exercise, and reduce academic stress to improve sleep quality and ensure healthy physical and mental development for secondary school students.

The global COVID-19 coronavirus pandemic has infected over 109 million people, leading to over 2 million deaths up to date and still lacking of effective drugs for patient treatment. Here, we screened about 1.8 million small molecules against the main protease (M^pro) and papain like protease (PL^pro), two major proteases in severe acute respiratory syndrome-coronavirus 2 genome, and identified 1851M^pro inhibitors and 205 PL^pro inhibitors with low nmol/l activity of the best hits. Among these inhibitors, eight small molecules showed dual inhibition effects on both M^pro and PL^pro, exhibiting potential as better candidates for COVID-19 treatment. The best inhibitors of each protease were tested in antiviral assay, with over 40% of M^pro inhibitors and over 20% of PL^pro inhibitors showing high potency in viral inhibition with low cytotoxicity. The X-ray crystal structure of SARS-CoV-2 M^pro in complex with its potent inhibitor 4a was determined at 1.8 Å resolution. Together with docking assays, our results provide a comprehensive resource for future research on anti-SARS-CoV-2 drug development.
Humans ; Antiviral Agents/chemistry* ; COVID-19 ; COVID-19 Drug Treatment ; High-Throughput Screening Assays ; Molecular Docking Simulation ; Protease Inhibitors/chemistry* ; SARS-CoV-2/enzymology* ; Viral Nonstructural Proteins