Objective: To explore incidence trend of hepatitis C in Chifeng City, Inner Mongolia Autonomous Region from 2008 to 2022, so as to provide the basis for formulating prevention and control measures for hepatitis C. Methods: Data of reported hepatitis C cases in Chifeng City from 2008 to 2022 was collected through the Infectious Disease Information Reporting Management System. Trends in incidence of hepatitis C were analyzed using annual percent change (APC) and average annual percent change (AAPC). Impact of age, period and birth cohort on the risk of developing hepatitis C were analyzed by an age-period-cohort model. Results: The annual average reported incidence rate of hepatitis C in Chifeng City was 59.13/105 from 2008 to 2022. The incidence showed an upward trend from 2008 to 2018 (APC=9.405%, P<0.05) and a downward trend from 2018 to 2022 (APC=-17.475%, P<0.05), but the overall trend was not statistically significant (AAPC=0.937%, P>0.05). The age-period-cohort model analysis showed that the incidence risks of hepatitis C in the residents aged 0 to 4 years and 45 to 84 years were higher than those in the residents aged 40 to 44 years (the control group). The incidence risk of hepatitis C increased with age from 40 to 79 years. Compared with 2008-2012, the incidence risk of hepatitis C showed an increasing trend followed by a decline in 2008-2022. The incidence risk was higher in 2013-2017 and lower in 2018-2022 than in 2008-2012. The incidence risk of hepatitis C showed an increasing trend followed by a decreasing trend by using the birth cohort from 1968 to 1972 as the control. The birth cohort from 1953 to 1977 had a higher incidence risk of hepatitis C than other birth cohorts. Conclusions The overall incidence of hepatitis C in Chifeng City from 2008 to 2022 appeared a tendency towards a decline, and the incidence risk increased with age. Screening and health education for the elderly and high-risk birth cohorts should be strengthened.

Objective:To understand the epidemiological characteristics of human respiratory syncytial virus (HRSV) among acute respiratory infection (ARI) cases in 16 provinces of China from 2009 to 2023.Methods:The data of this study were collected from the ARI surveillance data from 16 provinces in China from 2009 to 2023, with a total of 28 278 ARI cases included in the study. The clinical specimens from ARI cases were screened for HRSV nucleic acid from 2009 to 2023, and differences in virus detection rates among cases of different age groups, regions, and months were analyzed.Results:A total of 28 278 ARI cases were enrolled from January 2009 to September 2023. The age of the cases ranged from<1 month to 112 years, and the age M ( Q1, Q3) was 3 years (1 year, 9 years). Among them, 3 062 cases were positive for HRSV nucleic acid, with a total detection rate of 10.83%. From 2009 to 2019, the detection rate of HRSV was 9.33%, and the virus was mainly prevalent in winter and spring. During the Corona Virus Disease 2019 (COVID-19) pandemic, the detection rate of HRSV fluctuated between 6.32% and 18.67%. There was no traditional winter epidemic peak of HRSV from the end of 2022 to the beginning of 2023, and an anti-seasonal epidemic of HRSV occurred from April to May 2023. About 87.95% (2 693/3 062) of positive cases were children under 5 years old, and the difference in the detection rate of HRSV among different age groups was statistically significant ( P<0.001), showing a decreasing trend of HRSV detection rate with the increase of age ( P<0.001). Among them, the HRSV detection rate (25.69%) was highest in children under 6 months. Compared with 2009-2019, the ranking of HRSV detection rates in different age groups changed from high to low between 2020 and 2023, with the age M (Q1, Q3) of HRSV positive cases increasing from 1 year (6 months, 3 years) to 2 years (11 months, 3 years). Conclusion:Through 15 years of continuous HRSV surveillance analysis, children under 5 years old, especially infants under 6 months old, are the main high-risk population for HRSV infection. During the COVID-19 pandemic, the prevalence and patterns of HRSV in China have changed.

Objective:To understand the epidemiological characteristics of human respiratory syncytial virus (HRSV) among acute respiratory infection (ARI) cases in 16 provinces of China from 2009 to 2023.Methods:The data of this study were collected from the ARI surveillance data from 16 provinces in China from 2009 to 2023, with a total of 28 278 ARI cases included in the study. The clinical specimens from ARI cases were screened for HRSV nucleic acid from 2009 to 2023, and differences in virus detection rates among cases of different age groups, regions, and months were analyzed.Results:A total of 28 278 ARI cases were enrolled from January 2009 to September 2023. The age of the cases ranged from<1 month to 112 years, and the age M ( Q1, Q3) was 3 years (1 year, 9 years). Among them, 3 062 cases were positive for HRSV nucleic acid, with a total detection rate of 10.83%. From 2009 to 2019, the detection rate of HRSV was 9.33%, and the virus was mainly prevalent in winter and spring. During the Corona Virus Disease 2019 (COVID-19) pandemic, the detection rate of HRSV fluctuated between 6.32% and 18.67%. There was no traditional winter epidemic peak of HRSV from the end of 2022 to the beginning of 2023, and an anti-seasonal epidemic of HRSV occurred from April to May 2023. About 87.95% (2 693/3 062) of positive cases were children under 5 years old, and the difference in the detection rate of HRSV among different age groups was statistically significant ( P<0.001), showing a decreasing trend of HRSV detection rate with the increase of age ( P<0.001). Among them, the HRSV detection rate (25.69%) was highest in children under 6 months. Compared with 2009-2019, the ranking of HRSV detection rates in different age groups changed from high to low between 2020 and 2023, with the age M (Q1, Q3) of HRSV positive cases increasing from 1 year (6 months, 3 years) to 2 years (11 months, 3 years). Conclusion:Through 15 years of continuous HRSV surveillance analysis, children under 5 years old, especially infants under 6 months old, are the main high-risk population for HRSV infection. During the COVID-19 pandemic, the prevalence and patterns of HRSV in China have changed.

Objective: To investigate the prevalence of hepatitis C virus (HCV) infections among five high-risk populations in Inner Mongolia Autonomous Region, so as to provide insights into improvements in the control strategy for hepatitis C. Methods: The detection of anti-HCV antibody was collected from patients receiving renal dialysis, patients receiving invasive diagnosis and treatment in hospitals, physical examination populations, unpaid blood donors and subjects admitted to family planning clinics in national hepatitis C surveillance sentinels in Inner Mongolia Autonomous Region from 2013 to 2021, and the year-, gender- and age-specific prevalence of anti-HCV antibody was analyzed. Results: The mean prevalence of anti-HCV antibody was 2.19%, 1.81%, 0.05%, 0.10% and 0.03% among 3 600 patients receiving renal dialysis, 3 600 patients receiving invasive diagnosis and treatment in hospitals, 18 000 physical examination populations, 18 000 volunteer blood donors and 3 600 subjects admitted to family planning clinics, respectively. The prevalence of anti-HCV antibody appeared a tendency towards a decline among patients receiving renal dialysis (χ2trend=49.065, P<0.001) and volunteer blood donors (χ2trend=11.419, P=0.001). The prevalence of anti-HCV antibody was higher among male patients receiving invasive diagnosis and treatment in hospitals than among females (2.34% vs. 1.36%; χ2=4.826, P=0.028), and no gender-specific prevalence of anti-HCV antibody was seen among other four high-risk populations (all P>0.05). The highest prevalence of anti-HCV antibody was detected among patients receiving renal dialysis (3.30%) and patients receiving invasive diagnosis and treatment in hospitals at ages of 50 to 59 years (3.35%), while the highest prevalence was found among physical examination populations at ages of 60 years and greater (0.18%). Conclusion The prevalence of anti-HCV antibody was high among patients receiving renal dialysis and patients receiving invasive diagnosis and treatment in hospitals and low among physical examination populations, volunteer blood donors and subjects admitted to family planning clinics in Inner Mongolia Autonomous Region from 2013 to 2021. Periodical monitoring of anti-HCV antibody is recommended among the elderly.

Objective : To investigate the prevalence of hepatitis C virus (HCV) and syphilis among drug users (DUs) in Inner Mongolia Autonomous Region. Methods : DUs' epidemiological data were collected from 5 national AIDS surveillance sentinels in Inner Mongolia Autonomous Region in 2021 through the National HIV/AIDS Sentinel Surveillance Data Management System, and sexual behaviors, DU behaviors, HIV testing and behavioral interventions were descriptively analyzed. The factors affecting the HCV and syphilis infections were identified among DUs using a multivariable logistic regression model. Results : A total of 2 019 DUs were enrolled, with a mean age of (43.32±9.88) years. Among the participants, there were 1 958 males (96.98%), 1 830 with local registered residence (90.64%), 1 038 with marriage/cohabitation (51.41%), 1 410 with an educational level of junior high school and above (69.84%), and 1 884 with Han Ethnicity (93.36%). There were 1 605 DUs with use of conventional drugs (79.49%), 283 with use of new drugs (14.02%) and 131 with use of mixed drugs (6.49%), and there were 340 DUs with injection drug use (16.84%), including 41 that shared the needles (12.06%). There were 460 DUs with commercial sexual behaviors in the past year (22.78%). The percentage of HCV and syphilis positive was 23.63% and 3.81%, respectively, while no HIV positive case was detected. In addition, multivariable logistic regression analysis showed that age (40 years- , OR=3.747, 95%CI: 2.161-6.497; 50 years and older, OR=5.302, 95%CI: 3.064-9.177), local registered residence (OR=3.409, 95%CI: 1.935-6.008), use of conventional drugs (OR=1.477, 95%CI: 1.035-2.108), and injection drugs (OR=2.700, 95%CI: 2.067-3.527) caused an increased risk of HCV infections among DUs, and divorced/widowed (OR=3.413, 95%CI: 1.463-7.962) and non-local registered DUs (OR=2.404, 95%CI: 1.304-4.433) had an increased risk of syphilis infections. Conclusions Middle-aged men are predominant DUs in national AIDS surveillance sentinels in Inner Mongolia Autonomous Region, and the prevalence of HCV and syphilis infections correlates with age, household registration, marital status, type of drugs used and route of drug use.

Objective: To study the intracellular location and characteristic of SFTSV NP protein in different phases using mini singlet oxygen generator (miniSOG) labeling technique. Methods: MiniSOG is a recently-invented genetically-encoded tag for EM. MiniSOG-fused SFTSV NP (NPSOG) gene was cloned by PCR, and inserted into pcDNA3.0 plasmid to form pTPL-NPSOG, which was used to transfect 293 cells. The transfected cells of different phases were fixed in 2.5% glutaraldehyde in situ, stained with DAB through the photooxidation activity of miniSOG, and used to prepare ultrathin sections. Intracellular location and characteristic of SFTSV NP protein in different phases were studied by observing the sections under transmission electron microscope. Results: After transfecting the plasmid with NPSOG to 293 cells, NP protein was expressed in cytoplasm and peri nucleus, and gradually aggregated, which connected with endoplasmic reticulum and Golgi apparatus to form larger volume and irregular inclusion bodies in cytoplasm. No obvious subcellular structure changes were found. Conclusions The SFTSV nucleoprotein can be expressed separately to form inclusion bodies without the assistance of other viral proteins. The formation of inclusion bodies requires the directional movement and aggregation of a certain number of NP proteins, which may involve the interaction of NP protein and host organelles during this period.

Objective To investigate the role of rotational alignment reference landmarks of the proximal tibia in total knee arthroplasty.Methods Fifteen healthy adult volunteers were enrolled in this study,including 10 males and 5 females,aged from 21 to 38 years (average,28.1±6.0).CT scans of 26 knees were taken as the knees were placed in full extension.Two anteroposterior axes were drawn on the CT images:one line connected the middle of the posterior cruciate ligament insertion site and the medial edge of the patellar tendon,and another line connected the middle of the posterior cruciate ligament insertion site and the middle-medial 1/3 of the patellar tendon.The surgical epicondylar axis was also drawn on the CT images.Angles were measured between a line perpendicular to the surgical epicondylar axis and the two anteroposterior axes,and the angles were compared with the ideal tibial rotational alignment reference axis (0°).Results Angles between the line perpendicular to the surgical epicondylar axis and the line connecting the middle of the posterior cruciate ligament insertion site and the medial edge of the patellar tendon averaged 0.7°±2.8° (range,-5.1°-5.8°),there was no significant difference compared with 0°.Angles between the line perpendicular to the surgical epicondylar axis and the line connecting the middle of the posterior cruciate ligament insertion site and the middle-medial 1/3 of the patellar tendon averaged 6.9°±5.3° (range,-3.4°-14.1°),there was significant difference compared with 0°.Significant difference existed in angles between the two anteroposterior axes and the line perpendicular to the surgical epicondylar axis.Conclusion The line connecting the middle of the posterior cruciate ligament insertion site and the medial edge of the patellar tendon is a more reliable reference axis for the tibial component rotational alignment,which makes the femoral and tibial components in a more matching rotational position.

0.05).Twelve months after TKA, the pain score of HO group was 15.56,lower than 2 weeks and comparison group in 12 months(P

[Objective]To evaluate efficacy and method of arthroscopic meniscoplasty for horizontal tear of discoid lateral meniscus in a short follow-up term. [Method]A series of 27 patients (27 knees) (mean age 32 years, range 6 years to 42 years) who underwent arthroscopic evaluation and treatment of a discoid lateral meniscus between 2002 and 2006 was reviewed. All the patients who were selected had the horizontal type of tear. Of those discoid menisci classified intraoperatively (n=27), 85.2% (n=23) were complete discoid lateral menisci and 14.2% (n=4) were incomplete discoid lateral menisci. No Wrisberg type was noted. Arthroscopic meniscoplasty was performed in all cases. The horizontal tear meant meniscus was divided into two leaves. The auther removed the unstable leaf to the peripheral rim and preserved the stable one. Arthroscopic meniscoplasty was performed in the stable leaf.[Result]All the patients were evaluated at follow-up according to the Lysholm knee Scoring Scale. At follow-up, patients were reviewed to recognize possible of retear and requirement of arthroscopic revision. The knee score of these patients improved from 72.48?4.64 points preoperatively to 92.18?4.52 points postoperatively. Recurrence of tear or requirement of arthroscopic revision was not noted at the final follow-up. [Conclusion]Arthroscopic meniscoplasty of the horizontal tear of discoid meniscus is an effective method.

[Objective]To analyze the reasons of complications in high tibial valgus osteotomy in the varus osteoarthritic knee and its management.[Method]We studied the results of valgus-producing high tibial osteotomies in patients who had medial unicompartmental osteoarthritis and varus malalignment.We performed the operation for 126 patients from January 2000 to October 2004.Twenty-one patients had complications,including four men and seventeen women,with average age of 61 years(ranged:48～64 years).The femorotibial angle was measured on the standing anteroposterior film of knee preoperatively in order to get high accuracy in preoperative planning.A lateral closing-wedge osteotomy was performed,the osteotomy site was stabilized by Giebel blade plate or stepped staple.[Result]The mean duration of follow-up was 7.5 months(ranged,6 to 12 months).There were twenty-three complications(21 patients,16.7%):tibial fracture in four cases,deep-vein thrombosis in five cases,peroneal nerve palsy in three cases,recurrence of varus deformity in six cases,internal fixation failure in four cases(recurrence of varus deformity developed in two patients),a superficial wound infection developed in one patient.[Conclusion]To reduce the incidence of complications in high tibial valgus osteotomy,we should make familiarication with anantomy and take more accuracy in preoperative planning,improve surgical skill as well as appropriate perioperative management.