Objective To systematically evaluate the diversity of oral flora in patients with pancreatic cancer. Methods A cross-sectional study was conducted, focusing on the oral flora diversity profiles of patients with pancreatic cancer. The studies were retrieved from PubMed, Web of science, EMbase, The Cochrane Library, CBM, CNKI, Wanfang, and VIP databases, and the search period was from the establishment of the database to July 15, 2023. According to the inclusion and exclusion criteria, two researchers screened intensive review literature, extracted data and information, and carried out Meta-analysis using qualitative systematic review and Review Manager 5.4. Results Seven cross-sectional studies were reviewed, including 187 patients with pancreatic cancer and 440 healthy controls. The results of meta-analysis showed that the oral microbiota diversity Simpson index of patients with pancreatic cancer was reduced compared with that of healthy controls. Qualitative analysis showed that the relative abundance of Firmicute, Prevotella, Roseburia, and Streptococcus in patients with pancreatic cancer was higher than that in healthy people. The relative abundance of Proteobacteria, Neisseria, Haemophilus, porphyromonas, and Haemophilus parainfluenza in patients with pancreatic cancer was lower than that in healthy people. Conclusion Patients with pancreatic cancer have distinct oral flora, which has high relative abundance of Firmicutes, Prevotella etc. and low relative abundance of Proteobacteria, Neisseria, etc.

Objective:To investigate the feasibility of predicting the risk of spontaneous preterm birth in singleton pregnancy women with low risk of preterm birth by transabdominal-transvaginal ultrasound cervical length sequential screening in the second trimester.Methods:This prospective longitudinal cohort study included singleton pregnant women at 11-13 +6 gestational weeks who were admitted to Nanjing Drum Tower Hospital from January 2023 to September 2023. Transabdominal and transvaginal cervical lengths were measured during the mid-trimester fetal ultrasound scan at 18-24 weeks, and pregnancy outcomes were obtained after delivery. A short cervix was defined as a transvaginal cervical length of ≤25 mm, and the outcomes were defined as spontaneous preterm birth occurs between 20 and 36 +6 weeks and extremely preterm birth before 32 weeks. The area under the receiver operating characteristic (ROC) curve was used to evaluate the effectiveness of predicting spontaneous preterm birth by transabdominal and transvaginal cervix length, as well as the effectiveness of predicting short cervix by transabdominal cervical length. The relationship between transabdominal and transvaginal cervical length was evaluated using a scatter plot. Results:A total of 562 cases were included in this study, comprising 33 cases of spontaneous preterm birth (7 cases occurring before 32 weeks) and 529 cases of term birth. (1) Compared to the term birth group, transabdominal cervical length (median: 37.6 vs 33.2 mm; Z=-3.838, P<0.001) and transvaginal cervical length (median: 34.0 vs 29.9 mm, Z=-3.030, P=0.002) in the spontaneous preterm birth group were significantly shorter. (2) The areas under the ROC curve for predicting spontaneous preterm birth by transabdominal and transvaginal cervical length were 0.699 (95% CI: 0.588-0.809) and 0.657 (95% CI: 0.540-0.774), respectively. The sensitivity, specificity and positive predictive value of transvaginal cervical length Conclusions:In singleton pregnancy women with low risk of preterm birth, transabdominal-transvaginal cervical length sequential screening can reduce unnecessary transvaginal ultrasounds by approximately 41% without missing the diagnosis of pregnant women with a short cervix. This method also enhances the effectiveness of transvaginal cervical length to spontaneous preterm birth.

Objective:To quantitatively analyze the plaque components of carotid artery through energy spectrum computed tomography angiography(CTA),and to measure the blood flow perfusion in the blood-supply area of carotid artery through CT perfusion(CTP),so as to explore the relationship among plaque component,the degree of luminal stenosis and cerebral blood flow perfusion.Methods:A total of 68 patients with unilateral plaques of carotid artery and severe vascular stenosis who were screened and diagnosed by ultrasound and CTA in Xiyuan Hospital from December 2017 to July 2019 were selected,and all patients underwent CTA examination and CTP examination.North American symptomatic carotid endarterectomy test(NASCET)method was used to measure the degree of carotid stenosis.The GE AW 4.7 post-process workstation was used to conduct analyses of energy spectrum and cerebral perfusion for the plaque component.And then,the slope of energy spectrum curve and the effective atomic number were obtained.At the same time,the cerebral blood volume(CBV),cerebral blood flow(CBF),time to peak(TTP)and mean transit time(MTT)of contrast agent in blood-supplying area of anterior cerebral artery(ACA)and middle cerebral artery(MCA)at the side of lesion were measured.Results:A total of 68 measured plaques of 68 patients met the condition,including 44 vulnerable plaques(including lipid plaques and mixed plaques)and 24 stable plaques(fibrous plaques).The average slopes of the energy spectrum curves of vulnerable plaque and stable plaque were respectively 0.45±0.45 and 1.15±0.39,and the differences were significant(t=2.413,P<0.05).The averagely effective atomic numbers of vulnerable plaques and stable plaques were respectively 7.21±1.06 and 8.01±0.63,and the difference were significant(t=2.548,P<0.05).The average TTP values of the ACA at the side of lesion of vulnerable plaques and stable plaques were respectively(12.20±1.61)S and(13.59±2.79)S,and the difference was significant(t=-2.607,P<0.05).The mean MTT values of the ACA at the side of lesion of vulnerable plaques and stable plaques were respectively(5.07±1.66)S and(6.09±2.19)S,and the difference was significant(t=-2.177,P<0.05).The degree of vascular stenosis at the side of lesion was positively correlated with TTP and MTT in blood-supplying area of middle cerebral artery(MCA)at the side of lesion(r=0.537,0.465,P<0.05),and that was negatively correlated with CBF values in blood-supplying areas of ACA and MCA at the side of lesion(r=-0.281,-0.569,P<0.05),respectively.The slope of the energy spectrum curve of carotid plaque was positively correlated with the TTP values in blood-supplying areas of ACA and MCA at the side of lesion(r=0.242,0.246,P<0.05),respectively.Conclusion:CT spectral imaging can quantitatively analyze the displayed components of carotid atherosclerotic plaque,and the degree of vascular stenosis can affect the blood flow perfusion of cerebral tissue,and the delays of TTP and MTT are more easily caused by vulnerable plaque,and the TTP of them is more sensitivity.

Objective To investigate the relationship between choroidal thickness and white matter hyperintensity(WMH)in patients with recent subcortical small infarct(RSSI).Methods A total of 83 RSSI patients hospitalized in our hospital from November 2021 to May 2023 were enrolled,and according to paraventricular WMH,they were divided into no to mild lesion group 1(46 cases)and moderate to severe lesion group 1(37 cases),and based on deep WMH,40 of them were assigned into no to mild lesion group 2 and 43 cases into moderate to severe lesion group 2.All patients underwent cranial MRI for paraventricular WMH and deep WMH,and optical coher-ence tomography to measure choroid thickness by semi-automatic segmentation.The relationship between choroidal thickness and WMH at paraventricular and deep parts was analyzed.Results Significant advanced age,higher proportions of smoking and hypertension,and larger volume of deep WMH,while obviously thinner choroid thickness were observed in the moderate to severe lesion group 2 than the no to mild lesion group 2(P＜0.05,P＜0.01).While the moder-ate to severe lesion group 1 had older age,higher smoking and hypertension ratios,and higher volume of paraventricular WMH when compared with the no to mild group 1(P＜0.05,P＜0.01).Multivariate logistic regression analysis showed that age(OR=1.170,95％CI:1.064-1.287,P=0.001),hypertension(OR=4.533,95％CI:1.215-16.914,P=0.024),and choroidal thickness(OR=0.953,95％CI:0.931-0.975,P=0.001)were independent risk factors for deep WMH grade.Conclusion Changes in choroidal thickness in RSSI patients are independent influ-encing factors for severity of deep WMH lesions.The more severe the deep WMH lesion is,the thinner the choroidal thickness.

Objective To investigate the advantages and efficacy of traction with titanium clips in endoscopic submucosal dissection(ESD)for large laterally spreading tumor(LST)in rectum and sigmoid colon.Methods 67 patients with large sigmoid or rectal LST underwent ESD from January 2018 to June 2022 were analyzed retrospectively,including 32 patients in Group A and 35 patients in Group B.Group A was treated with clip-line traction and group B was treated with traditional ESD.The size of lesion,the total operation time,the submucosal dissection time,submucosal dissection rate,submucosal injection number,en bloc resection rate,R0 resection rate,curative resection rate and complications of the two groups were compared.Results LST-G-M was the most common type and villous adenoma was the main pathology in both groups.There were no differences in en bloc resection rate,R0 resection rate and incidence of complications between the two groups.The average size of group A was(13.6±8.4)cm2,significantly larger than that in group B(9.3±4.7)cm2,the total operation time was(42.3±10.3)min in group A,significantly shorter than that in group B(47.9±10.1)min,submucosal dissection time was(30.7±8.2)min in group A,significantly shorter than that in group B(36.1±7.6)min,submucosal injection number was(2.7±1.1)times in group A,significantly less than that in group B(3.5±1.2)times,submucosal dissection rate was(0.4±0.2)cm2/min in group A,significantly faster than that in group B(0.2±0.1)cm2/min,the differences were statistically significant(P<0.05).Conclusion Compared with traditional ESD,clip-line traction can provide a better surgical field and more effective dissection for large LST in rectum and sigmoid colon.

Objective To explore the effects of attention and interpretation therapy on psycho-logical resilience,perceived stress and post-traumatic growth for postoperative chemotherapy patients with lung cancer.Methods A total of 100 postoperative lung cancer patients receiving chemotherapy were randomized into control group(n=51)and study group(n=49).The control group implemen-ted conventional psychological guidance,including affective care,psychological comfort and relaxa-tion training;the study group implemented a 10-week attention and interpretation therapy,which mainly included transcendental meditation,emotional coping,gratitude recall,individualizedpsycho-logical guidance,positive thinking training and self-acceptance.The psychological resilience scale(CD-RISC),perceived stress scale(CPSS)and post-traumatic growth inventory(PTGI)scores of the two groups were compared after the intervention.Results After intervention,the scores of all di-mensions and total scores of CD-RISC in two groups were improved compared with those before inter-vention,and were higher in the study group than the control group(P＜0.05).After intervention,the CPSS scores and total scores of two groups were lower than before intervention,and the study group was lower than the control group(P＜0.05).After intervention,PTGI scores in both groups were higher than before intervention,and the study group was higher than the control group(P＜0.05).Conclusion For postoperative chemotherapy patients with lung cancer,the psychological in-tervention of attention and interpretation therapy can effectively alleviate patients'perceptual stress,enhance their psychological resilience status,and improve level of post-traumatic growth.

Influenza viruses are common pathogens causing respiratory infections in humans. Among the four seasonal influenza viruses, influenza A virus H3N2 has become the leading cause of seasonal influenza illness and death, posing a great threat to public health and the economy. Since it first emerged and caused a pandemic in 1968, H3N2 has been circulating repeatedly in human beings and continually evades host immune attack by antigenic drift, resulting in a decrease in vaccine efficacy. In this paper, the antigenic evolution of influenza A virus H3N2, the impact of antigenic evolution on the selection of vaccine strains and some models for predicting the evolution of influenza viruses were analyzed and reviewed, which paved the road for understanding the antigenic evolution of influenza virus and vaccine development.

Sexual and gender minorities have social behavioral characteristics such as aggregation， mobility， exclusivity， and concealment， which may be associated with the transmission of infectious diseases in this group. This paper aims to explore the relationship between the sociality of this group and its transmission and prevention and control of infectious diseases， emphasize the importance of paying attention to the transmission of sexually transmitted diseases and respiratory diseases in sexual and gender minorities. This paper puts forward some thoughts for infectious disease prevention and control of this group in the future.

Objective To explore the effects of attention and interpretation therapy on psycho-logical resilience,perceived stress and post-traumatic growth for postoperative chemotherapy patients with lung cancer.Methods A total of 100 postoperative lung cancer patients receiving chemotherapy were randomized into control group(n=51)and study group(n=49).The control group implemen-ted conventional psychological guidance,including affective care,psychological comfort and relaxa-tion training;the study group implemented a 10-week attention and interpretation therapy,which mainly included transcendental meditation,emotional coping,gratitude recall,individualizedpsycho-logical guidance,positive thinking training and self-acceptance.The psychological resilience scale(CD-RISC),perceived stress scale(CPSS)and post-traumatic growth inventory(PTGI)scores of the two groups were compared after the intervention.Results After intervention,the scores of all di-mensions and total scores of CD-RISC in two groups were improved compared with those before inter-vention,and were higher in the study group than the control group(P＜0.05).After intervention,the CPSS scores and total scores of two groups were lower than before intervention,and the study group was lower than the control group(P＜0.05).After intervention,PTGI scores in both groups were higher than before intervention,and the study group was higher than the control group(P＜0.05).Conclusion For postoperative chemotherapy patients with lung cancer,the psychological in-tervention of attention and interpretation therapy can effectively alleviate patients'perceptual stress,enhance their psychological resilience status,and improve level of post-traumatic growth.