ObjectiveTo investigate the infection and genotypes of Wolbachia in Aedes albopictus. MethodsAdult and larval samples of Aedes albopictus were collected from different residential and wild areas from 2020 to 2021， Wolbachia surface protein （wsp） gene was amplified and genotyped for wAlbA and wAlbB by PCR， and sequenced for phylogenetic analysis. The difference of detection rate among different habitats， male and female adult mosquitoes， adult and larvae was compared by χ² analysis. ResultsThe detection rate of Wolbachia in adult and larvae of Aedes albopictus were 43.5% （77/177） and 70.4% （190/270）， respectively， with a statistically significant difference （χ²=32.086，P<0.001）， and wAlbA and wAlbB were mainly detected together. The detection rate of Wolbachia in female and male Aedes albopictus were 50.7% （76/150） and 3.7% （1/27）， respectively， with a statistically significant difference（χ²=20.533，P<0.001）. The detection rate of adult Aedes albopictus in Songjiang wild area， residential area and Hongkou residential area were 91.7% （55/60）， 18.8% （22/117） and 41.7% （30/72）， respectively， with a statistically significant difference （χ²=54.322，P<0.001）. Genotyping and phylogenetic analysis showed that adult and larvae of Aedes albopictus infected with Wolbachia were mainly wAlb A and wAlb B. In addition， some sequences formed clades independently， and the genetic distance from other sequences was relatively large. ConclusionInfection of Wolbachia in Aedes albopictus is relatively common in Songjiang District. The main genotypes are wAlb A and wAlb B and there may be other subtypes， which are worthy of further exploration and research.

ObjectiveTo investigate the relationship between mosquito density fluctuations and meteorological factors, so as to provide a scientific basis for mosquito surveillance analysis, risk assessment, and comprehensive prevention and control. MethodsMosquito surveillance and monitoring data of 2020‒2023 was obtained from on-site supervisory sampling by Songjiang Center for Disease Control and Prevention, and meteorological data was obtained from the Wheat A wheat malt-agro-meteorological big data system. Excel 2019 and SPSS 25.0 software were used to organize and analyze the mosquito number, species composition, and seasonal changes in mosquito density captured by the CO₂-light trap at rach monitoring site. Circular distribution method was used to calculate the peak time of mosquito density, combined with the meteorological data of the same period to explore the impact of meteorological factors on the results of mosquito surveillance. ResultsThere was a statistical difference in the overall distribution of mosquito quantity in different habitats(H=23.11, P<0.05), 2020‒2023. In addition, the results showed that July 28th was the peak day for mosquito density, and the duration from June 13th to September 11th was the seasonal peak period for mosquitoes. Pearson correlation analysis showed a positive correlation between mosquito density and average air temperature, average highest air temperature, average lowest air temperature, extreme maximum air temperature, extreme minimum air temperature, precipitation, and number of precipitation days (all P<0.01). While, there was no significant correlation between average wind speed and mosquito density (P>0.05). Multiple stepwise regression analysis resulted in the equation of Y=0.151X_{extreme minimum temperature}+0.321X_{number of precipitation days}+1.002X_{SQRT precipitation}-1.288 (F=102.635, P<0.05). ConclusionThe CO₂-light trap is advisable to monitor the habitats of farmers, livestock sheds, residential areas, parks, hospitals, and other external environments. Air temperature and precipitation have a significant impact on mosquito density. It is recommended to implement comprehensive prevention and control measures to reduce mosquito density and prevent mosquito-borne diseases before the peak period of mosquitoes.

The diagnosis and treatment resources for rare diseases in China are highly imbalanced. The basic diagnosis and treatment capabilities are weak, the diagnosis period for patients is long, and the rates of missed diagnosis and misdiagnosis are relatively high. The establishment of a hierarchical diagnosis and treatment system is the inevitable approach to enhancing the diagnosis and treatment standards of rare diseases. Currently, the implementation of the domestic hierarchical diagnosis and treatment system for rare diseases still confronts numerous challenges, such as ambiguous referral standards and processes of primary medical institutions, and ineffective information interaction among institutions at all levels. Thus, it is essential to facilitate high-level information construction for the hierarchical diagnosis and treatment of rare diseases. This paper explores the process of constructing a multidisciplinary joint remote diagnosis and treatment platform and a health management platform through informatization, with the hope of establishing two closed loops of digital diagnosis and treatment services and health follow-up management for patients with rare diseases, as well as achieving timely diagnosis and lifelong health management for patients. It integrates and optimizes auxiliary diagnostic tools, promotes the rapid dissemination of rare disease diagnosis and treatment experiences to the grassroots, enhances the information construction level of the hierarchical diagnosis and treatment system, and endeavors to address the practical predicament of weak diagnosis and treatment capabilities of rare diseases in grassroots medical institutions. Additionally, this paper proposes an essential approach for multi-dimensional independent innovation to guide the popularization of efficient and high-quality rare disease diagnosis and treatment services. By encompassing innovating the rare disease diagnosis and treatment collaboration network and multidisciplinary diagnosis and treatment model, facilitating the application of the latest biomedical and informatics technologies to the grassroots, and constructing a national intelligent data platform for rare disease innovation, a new model for rare disease services with Chinese characteristics will be established. This will significantly enhance the medical treatment level of rare diseases in China and strive for more benefits for patients.

Objective To observe value of thin slice CT multiple signs combined with multiplanar reformation(MPR)for diagnosing tracheobronchial tuberculosis(TBTB).Methods Data of 234 TBTB patients who underwent chest thin slice CT scanning were retrospectively analyzed.MPR was performed,the direct signs and indirect signs of TBTB were observed.The diagnostic efficacy of axial plain CT images(direct observation)and of MPR combined with the former(combined observation)were compared.Results The sensitivity,specificity,positive predictive value,negative predictive value and accuracy of direct observation was 38.88％(201/517),98.13％(1 789/1 823),85.53％(201/235),84.99％(1 789/2 105)and 85.04％(1 990/2 340),respectively,of combined observation was 91.10％(471/517),98.85％(1 802/1 823),95.54％(471/493),97.51％(1 802/1 848)and 97.14％(2 273/2 340),respectively.Significant differences of sensitivity,positive predictive value,negative predictive value and accuracy were found(all P＜0.001),whereas no significant difference of specificity was found between 2 methods(P＞0.05).Conclusion Thin slice CT multiple signs combined with MPR could be used to effectively diagnose TBTB.

Astrocytes(AS)are the most abundant glial cells in the central nervous system and are involved in many physiological and pathological processes in the nervous system.Alterations in their phenotype are particularly important for the health of the CNS.Epigenetic mechanisms,including DNA methylation,histone modification,non-coding RNA regulation,and chromatin remodeling,are closely linked to alterations in AS proliferation,differentiation,inflammation,and other phenotypic features,but how these mechanisms function needs to be explored and summarized.By reviewing the recent advances in the role of epigenetic mechanisms in AS under various physiological and pathological states,we aim to provide new ideas for the understanding and treatment of related diseases.

OBJECTIVE: To investigate the value of T2 mapping in the assessment of myocardial changes and prognosis in patients with acute ST segment elevation myocardial infarction (STEMI). METHODS: A retrospective study was conducted. A total of 30 patients with acute STEMI admitted to Tianjin First Central Hospital from January 2021 to March 2022 were enrolled as the experimental group. At the same time, 30 age- and sex-matched healthy volunteers and outpatients with non-specific chest pain with no abnormalities in cardiac magnetic resonance (CMR) examination were selected as the control group. CMR was performed within 2 weeks after the diagnosis of STEMI, as the initial reference. A plain CMR review was performed 6 months later (chronic myocardial infarction, CMI). Plain scanning includes film sequence (CINE), T2 weighted short tau inversion recovery (T2-STIR), native-T1 mapping, and T2 mapping. Enhanced scanning includes first-pass perfusion, late gadolinium enhancement (LGE), and post-contrast T1 mapping. Quantitative myocardial parameters were compared between the two groups, before and after STEMI myocardial infarction. The receiver operator characteristic curve (ROC curve) was used to evaluate the diagnostic efficacy of native-T1 before myocardial contrast enhancement and T2 values in differentiating STEMI and CMI after 6 months. RESULTS: There were no statistically significant differences in age, gender, heart rate and body mass index (BMI) between the two groups, which were comparable. The native-T1 value, T2 value and extracellular volume (ECV) were significantly higher than those in the control group [native-T1 value (ms): 1 434.5±165.3 vs. 1 237.0±102.5, T2 value (ms): 48.3±15.6 vs. 21.8±13.1, ECV: (39.6±13.8)% vs. (22.8±5.0)%, all P < 0.05]. In the experimental group, 12 patients were re-examined by plain CMR scan 6 months later. After 6 months, the high signal intensity on T2-STIR was still visible, but the range was smaller than that in the acute phase, and the native-T1 and T2 values were significantly lower than those in the acute phase [native-T1 value (ms): 1 271.0±26.9 vs. 1 434.5±165.3, T2 value (ms): 34.2±11.2 vs. 48.3±15.6, both P < 0.05]. ROC curve analysis showed that the area under the ROC curve (AUC) of native-T1 and T2 values in differentiating acute STEMI from CMI was 0.71 and 0.80, respectively. When native-T1 cut-off value was 1 316.0 ms, the specificity was 100% and the sensitivity was 53.3%; when T2 cut-off value was 46.7 ms, the specificity was 100% and the sensitivity was 73.8%. CONCLUSIONS The T2 mapping is a non-invasive method for the diagnosis of myocardial changes in patients with acute STEMI myocardial infarction, and can be used to to evaluate the clinical prognosis of patients.
Humans ; ST Elevation Myocardial Infarction/diagnosis* ; Contrast Media ; Prognosis ; Retrospective Studies ; Magnetic Resonance Imaging, Cine/methods* ; Gadolinium ; Myocardium/pathology* ; Myocardial Infarction ; Predictive Value of Tests

Objective:To explore the characteristics of gut microbiota in the preoperative, short-term postoperative and long-term postoperative period at (15.61±4.51) months in children with ventricular septal defect (VSD) of congenital heart disease (CHD) treated with cardiopulmonary bypass (CPB).Methods:A prospective study was conducted.In Guangzhou Women and Children′s Medical Center, 13 patients with VSD who were scheduled for CPB and additional 10 age- and gender-matched healthy infants as pre-CPB control group from January 2021 to January 2022 were enrolled.Fecal samples were collected at pre- and early post-CPB.Meanwhile, 18 gender- and CHD diagnosis and operation-matched patients at (15.61±4.51) months after CPB and 8 healthy age- and gender-matched children as long-term control group after CPB were also enrolled, and fecal samples were collected.16S rRNA sequencing of fecal samples from all subjects were performed and comparing the differences in gut microbiota between two groups via comparing alpha and beta diversity, parameter test or nonparametric test, and LEfSe analysis.Results:Compared with those of pre-CPB control group, there was a significant difference in the composition of gut microbiota in the preoperative period of VSD children, with significantly increased abundances of Enterobacteriaceae and Shigella, and decreased abundance of Bifidobacterium (all P<0.05). The diversity of gut microbiota was comparable in VSD children before CPB and in the short period time after CPB (all P>0.05), except for the abundances of Clostridium and Streptococcus (all P<0.05), and there was no significant difference in the relative abundances of other highly abundant gut bacteria between the two periods (all P>0.05). Compared with that in VSD children in the short period time after CPB, the abundances of short-chain fatty acids-producing microbes were significantly higher at (15.61±4.51) months postoperatively (all P<0.05), and the gut bacteria profile was similar to that of the long-term control group after CPB (all P>0.05). Conclusions:Gut microbiota imbalance exists in VSD children before CPB.The gut microbiota profile is not influenced by CPB, which returns normal at (15.61±4.51) months postoperatively.

Objective:To explore the diagnostic performance of cardiac magnetic resonance imaging (CMR) with T1 mapping and T2 mapping for detection of acute phase of ischemic cardiomyopathy.Methods:Twenty-four patients with acute myocardial infarction (AMI) detected by coronary angiography from May 2020 to April 2021 in Tianjin First Center Hospital were selected. All patients underwent CMR (Philips Ingenia 3.0-T) at (9±4) days after definite diagnosis, which was defined as the first diagnosis. After 3 months and 6 months of chronic myocardial infarction (CMI) phase, one CMR was performed. On the same period with age and sex matching, a total of 26 cases of healthy volunteers and outpatient with non-specific chest pain and CMR examination without abnormality as control group. Plain scan included Cine, T2-weighted (STIR), and native T1/T2 mapping. The enhanced scan included perfusion, late gadolinium enhancement, post-T1 mapping. The changes of myocardial quantitative parameters before and after myocardial infarction were compared. Receiver operator characteristic curves (ROC curve) were developed to evaluate, compare, and distinguish the changes in the AMI group and the CMI group after 6 months.Results:Pre-enhanced T1 value, T2 value and extracellular volume (ECV) of AMI group were significantly higher than those of control group [pre-enhanced T1 value (ms): 1 438.7±173.4 vs. 1 269.2±42.3, pre-enhanced T2 value (ms): 49.8±9.3 vs. 21.7±4.0 , ECV (%): 33.2±10.2 vs. 27.2±2.1, all P < 0.05]. ECV was significantly higher in AMI (%: 33.2±10.2 vs. 27.2±2.1), but stabilized after 3 months (%: 33.2±10.2 vs. 32.4±5.1), and after 6 months later (%: 27.7±4.9 vs. 32.4±5.1), there were no significant difference (all P > 0.05). Pre-enhanced T1 and T2 values were significantly higher in AMI, lower after 3 months, but significantly decreased after 6 months [pre-enhanced T1 values (ms): 1 438.7±173.4 vs. 1 272.1±25.2, pre-enhanced T2 values (ms): 49.8±9.3 vs. 29.0±4.0, all P < 0.05]. The ROC curve showed that the specificity of pre-enhanced T1 and T2 values between AMI and CMI were 100%, and the sensitivity were 72.7%, 100%, respectively, pre-enhanced T1 and T2 value could be better distinguish between AMI and CMI diagnosis method. Conclusion:T1 mapping and T2 mapping with ECV can clearly diagnosis ischemic cardiomyopathy, especially pre-enhanced myocardial T1 and T2 values which is non-invasive diagnosis method of AMI, and can distinguish AMI or CMI, has a great significance to the patient's clinical treatment and follow-up.

Objective Based on mosq-ovitrap monitoring method of Aedes albopictus， to determine the spatial and temporal distribution of Aedes albopictus in Songjiang District and provide scientific evidence for prevention and control of mosquito-borne diseases. Methods From May to October， 2018‒2020， density of Aedes albopictus was monitored by using the mosq-ovitrap method. Sub-districts and towns were used as the monitoring units and the difference in mosquito ovitrap index （MOI） was compared by seasons， years and habitats. Results The total number of positive mosquito ovitraps was 1049 in 2018‒2020， and the average MOI was 8.10. Four sub-districts/towns in the urban area and the northern area had the relatively high MOIs. Moreover， MOIs in residential and external environments were higher than other habitats. In addition， MOI of Aedes albopictus decreased over years from 2018 to 2020. Conclusion Aedes albopictus is widely distributed in Songjiang District. Although the number of mosquito decreased over years after the implementation of mosquito control measures， reproduction of mosquito remains excessive in some areas and seasons. It is necessary to perform targeted control measures based on comprehensive monitoring methods.

Objective:To analyze the treatment process of a renal transplant patient infected with coronavirus disease 2019 (COVID-19), and discuss the management strategy for the immunocompromised hosts.Methods:The diagnosis and treatment of a case of transplant patients with COVID-19 admitted to Horgos designated hospital of Xinjiang Uygur Autonomous Region in October 2021 were reviewed. The medical history and laboratory and imaging examination treatment and outcome of this case were analyzed.Results:The recipient was a middle-aged male with a time from renal transplantation of 3 years. The onset was moderate to low fever, accompanied by cough and fatigue. Chest CT showed multiple ground glass shadows under the pleura of both lungs, mainly in both lower lungs, gradually worsening until "white lung" appeared, with early renal and cardiac insufficiency. In the course of treatment, immunosuppressants were reduced and the dosage of glucocorticoid was increased. In the early stage, due to renal insufficiency and hyperkalemia, dialysis was conducted for 3 times. Oral abidol and Lianhua Qingwen capsule were given as antiviral and anti-infection treatment. Special immunoglobulin and convalescent plasma of COVID-19 were used to boost the immunity of patients. The patient was eventually clinically cured.Conclusions:The clinical manifestations and diagnosis of COVID-19 for the kidney transplantation recipient are not significantly different from other populations, but immunocompromised hosts are more likely to suffer from organ dysfunction. The adjustment of immunosuppressants and glucocorticoids, respiratory support, selection of antibiotics, organ protection, nutritional support and traditional Chinese medicine intervention in the treatment of renal transplant recipients with severe COVID-19 need further discussion.