Objective To understand the epidemiological and clinical characteristics of healthcare-associated infec-tion(HAI)in neonates with different gestational ages and birth weights,and provide guidance for personalized cli-nical diagnosis and treatment.Methods According to the inclusion and exclusion criteria,240 neonates with HAI in the neonatal intensive care unit(NICU)of a hospital in Handan City from January 2018 to December 2022 were selected as the study group,720 neonates without HAI were selected as the control group based on systematic sam-pling method with a ratio of 1∶3.The incidence of HAI,distribution characteristics of infection site,pathogenic features of HAI,as well as the effect of different delivery modes on HAI in neonates with different gestational ages and birth weights were analyzed.Results Neonates with gestational age＜28 weeks and birth weight＜1 000 g had the highest incidence of HAI,which were 19.48％and 20.41％,respectively.Among neonates with gestational age＜28 weeks,unidentified site infection were the most(37.50％),while in all gestational age groups within 28-36+6 weeks,bloodstream infection(BSI)and respiratory system infection were predominant.For neonates with gestational age ≥37 weeks,BSI and unidentified site infection occurred frequently.Among neonates in all weight groups,BSI was the most frequent,followed by respiratory system infection.Pathogens from different sites of in-fections in neonates with different gestational ages and birth weights varied.Among neonates with gestational age of 28-31+6 weeks and birth weight of 1 000-1 499 g,the constituent of birth modes showed statistically significant difference between neonates with and without HAI(both P＜0.05).Conclusion Epidemiological and clinical chara-cteristics of HAI in neonates with different gestational ages and birth weights are different.For the prevention and control of HAI,individualized diagnosis and treatment plans should be developed to achieve precise prevention and control,reduce the incidence of HAI,and improve the overall treatment level of neonates.

Glucose-6-phosphate dehydrogenase (G6PD) is the first rate-limiting enzyme of the pentose phosphate pathway, which regulates the production of nicotinamide adenine dinucleotide phosphate (NADPH) in cells, and plays an important role in redox reactions. In addition, NADPH is necessary for biosynthesis reactions and is an essential hydrogen donor in the biosynthesis of cholesterol, fatty acids, and sex hormones. NADPH also plays an important role in maintaining intracellular redox homeostasis, converting intracellular oxidized glutathione into reduced glutathione (GSH), which is the main intracellular antioxidant. Therefore, G6PD plays an important role in maintaining intracellular redox homeostasis. Studies have shown that the decrease in G6PD activity can lead to a breakdown of the redox balance in the cells and tends to the oxidation state, which not only leads to dysregulation of cell growth and signaling, but also makes the host more susceptible to viruses. Previous studies have focused on the molecular characteristics of G6PD, anemia caused by G6PD deficiency, and the relationship between malignant tumors and G6PD. In recent years, more attentions have been paid to the importance of G6PD at the cellular level, development, and disease progression. To explore the effects of G6PD on viral life cycle, the relationship between G6PD and viral infections, including the clinical symptoms and virus-host interactions of hepatitis B virus (HBV), human papilloma virus (HPV), hepatitis E virus (HEV), influenza virus and dengue fever virus (DENV) will be reviewed, which will benefit the antiviral drugs development. Many studies had proved that patients with deficient G6PD are more susceptible to HBV infection. It has been reported that HBV infection activates the glycolytic pathway, promotes pentose phosphate pathway, and accelerates citric acid cycle to enhance nucleotide and fat biosynthesis, thereby promoting viral replication. During HPV infection, miR-206 up-regulates the expression of G6PD to facilitate viral replication. Thus, G6PD may be a new target for anti-cervical cancer therapy. It was reported that patients with G6PD deficiency are more susceptible to HEV infection, and more serious HEV infection-associated diseases are developed. However, the mechanism of why and how the deficiency of G6PD affect HEV infection is still unclear. The oxidative stress caused by G6PD deficiency provides a suitable environment for influenza virus replication. Furthermore, patients with G6PD deficiency are more susceptible to SARS-CoV-2 infection and lead to more severe clinical symptoms with a higher risk of thrombosis and hemolysis than general population. There is a correlation between DENV infection and G6PD deficiency, which increase the risk of hemolysis, however, the pathogenesis is still unknown. The deficiency of G6PD promotes HCoV 229E infection, possibly because the NF-κB signal pathway is suppressed when G6PD deficiency, which results in decreased innate antiviral immune, and increased susceptibility to HCoV 229E, finally leads to increased viral replication. Thus, the deficiency of G6PD play an important role during viruses’ infection, especially the susceptibility. More studies should be performed on the relicationship between G6PD deficiency and specific viral susceptibility, and more attentions shoud be paid to G6PD deficient patients, which will benefit the treatment of viral infection and the development of antiviral drugs.

Aim To prepare prostate cancer exosomes containing melittin and observe their uptake by prostate cancer cells. Methods Cells treated with starvation for different time were screened for exosome extraction. Exosomes from PC-3 cells were extracted by ultracentrifugation, and the extracted particles were examined by transmission electron microscopy, nanoparticle tracking analyzer(NTA), and Western blot. Melittin exosome system was prepared by repeated freeze-thaw method, incubation at room temperature as well as electroporation, and the size of encapsulation efficiency was measured by centrifugation. A high-performance liquid chromatography(HPLC)method was applied to assay the content of melittin exosomes(exo-mel). Fluorescence inverted microscopy was employed to evaluate the uptake of melittin exosomes by PC-3 cells, DU145 cells as well as LNCaP cells. Results The results of starvation treatment showed that 24 h starvation treatment was the optimal time point. TEM results showed that the exosomes were round or oval in shape with a distinct membranous structure, and the diameter was around 100 nm. The reagent protein concentration for NTA analysis of exosomes was 0.222 g·L-1. The results of Western blot for the marker proteins of exosomes showed that Alix and CD63 were positively expressed, which indicated that the exosomes could be obtained by starvation culture of PC-3 cells and ultracentrifugation. The results of entrapment efficiency showed that the entrapment efficiency of electroporation method was 17.51% ± 2.39%, that of repeated freeze-thaw method was 11.46% ± 1.02%, and that of room temperature incubation method was 3.93% ± 2.44%. The encapsulation efficiency of electroporation was the highest with significant difference(P<0.05). The uptake assay showed that PC-3 cells could efficiently take up exo-mel in a time-dependent manner, and DU145 cells and LNCaP cells also could take up exo-mel over time. Conclusions Exosomes can be accessed by starvation treatment and high-speed centrifugation, and the prostate cancer melittin exosome system prepared by electroporation method could be taken up by prostate cancer cells.

Objective: To study the infection rate of secondary close contacts of COVID-19 patients, and assess the infection risk in the contacts. Methods: COVID-19 patients' close contacts (with a clear exposure time to index case) with negative nucleic acid test results and secondary close contacts were surveyed in continuous isolation and medical observation in this prospective study. The dynamic nucleic acid test results of the close contacts and secondary contacts of COVID-19 patients were collected to assess their risk of infection. Results: A total of 4 533 close contacts were surveyed, in whom 14 were confirmed as COVID-19 patients with overall secondary attack rate of 0.31%, and 4 201 secondary contacts were tracked, in whom no subsequent infections occurred. Conclusion: Close contacts of COVID-19 patients entered in centralized isolation for medical observation with negative nucleic acid tese results,the secondary close contacts of COVID-19 patients have no risk of infection.
COVID-19/epidemiology* ; Contact Tracing ; Humans ; Incidence ; Nucleic Acids ; Prospective Studies ; SARS-CoV-2

OBJECTIVE: To observe the occurrence time of neuralgia and the expression of purinergic ligand-gated ion channel 7 receptor (P2X7R) in the dorsal horn of the spinal cord after intraperitoneal injection of streptozotocin (STZ) in diabetic rats, and to explore the effect of electroacupuncture (EA) and pretreatment of EA on the heat pain threshold and expression of P2X7R in the spinal dorsal horn in rats with diabetic neuropathic pain (DNP), and to explore the possible mechanism of EA for DNP. METHODS: PartⅠ: Thirty male SD rats were randomly selected from 64 male SD rats as the control group; the remaining rats were given intraperitoneal injection of STZ (10 mg/mL) at a dose of 65 mg/kg to establish the diabetes model, and 30 rats were successfully modeled as the model group. The control group and the model group were divided into three subgroups respectively at 7, 14 and 21 days, with 10 rats in each subgroup. Body mass, fasting blood glucose (FBG) and thermal pain threshold were recorded at 7, 14 and 21 days after injection; the expression of P2X7R in spinal dorsal horn was detected by Western blot. PartⅡ: Eight SD rats were randomly selected from 35 male SD rats as the blank group, and the remaining 27 rats were given intraperitoneal injection of STZ (10 mg/mL) at a dose of 65 mg/kg to establish the diabetes model. The 24 rats with successful diabetes model were randomly divided into a DNP group, an EA group and a pre-EA group, 8 rats in each group. Fifteen to 21 days after STZ injection, the EA group received EA at "Zusanli" (ST 36) and "Kunlun" (BL 60), continuous wave, frequency of 2 Hz, 30 min each time, once a day; the intervention method in the pre-EA group was the same as that in the EA group. The intervention time was 8 to 14 days after STZ injection. The body mass, FBG and thermal pain threshold were recorded before STZ injection and 7, 14 and 21 days after STZ injection; the expression of P2X7R in spinal dorsal horn was detected by Western blot 21 days after injection. RESULTS: PartⅠ: Compared with the control group, in the model group, the body mass was decreased and FBG was increased 7, 14 and 21 days after STZ injection (P<0.01), and the thermal pain threshold was decreased 14 and 21 days after STZ injection (P<0.05), and the expression of P2X7R in spinal dorsal horn was increased 7, 14 and 21 days after STZ injection (P<0.05, P<0.01). PartⅡ: Compared with the blank group, in the DNP group, the body mass was decreased and fasting blood glucose were increased 7, 14 and 21 days after STZ injection (P<0.01). Compared with the DNP group, in the pre-EA group, the heat pain threshold was increased 14 and 21 days after STZ injection (P<0.05), while in the EA group, the heat pain threshold was increased 21 days after STZ injection (P<0.01), and the expression of P2X7R in the dorsal horn in the EA group and the pre-EA group was decreased (P<0.01). CONCLUSION The diabetic neuropathic pain is observed 14 days after STZ injection. EA could not only treat but also prevent the occurrence of DNP, and its mechanism may be related to down-regulation of P2X7R expression in the dorsal horn of the spinal cord.
Animals ; Diabetes Mellitus, Experimental/therapy* ; Electroacupuncture ; Male ; Neuralgia/therapy* ; Rats ; Rats, Sprague-Dawley ; Spinal Cord ; Spinal Cord Dorsal Horn

Objective To measure the prevalence of mental health symptoms and identify the associated factors among college students at the beginning of coronavirus disease 2019(COVID-19)outbreak in China. Methods We carried out a multi-center cross-sectional study via snowball sampling and convenience sampling of the college students in different areas of China.The rates of self-reported depression,anxiety,and stress and post-traumatic stress disorder(PTSD)were assessed via the 21-item Depression-Anxiety-Stress Scale(DASS-21)and the 6-item Impact of Event Scale-Revised(IES-6),respectively.Covariates included sociodemographic characteristics,health-related data,and information of the social environment.Data pertaining to mental health service seeking were also collected.Multivariate Logistic regression analyses were performed to identify the risk factors. Results A total of 3641 valid questionnaires were collected from college students.At the beginning of the COVID-19 outbreak,535(14.69%)students had negative emotions,among which 402(11.04%),381(10.49%),and 171(4.90%)students had the symptoms of depression,anxiety,and stress,respectively.Meanwhile,1245(34.19%)college students had PTSD.Among the risk factors identified,male gender was associated with a lower likelihood of reporting depression symptoms(AOR=0.755,P=0.037],and medical students were at higher risk of depression and stress symptoms than liberal arts students(AOR=1.497,P=0.003;AOR=1.494,P=0.045).Family support was associated with lower risks of negative emotions and PTSD in college students(AOR=0.918,P<0.001;AOR=0.913,P<0.001;AOR=0.899,P<0.001;AOR=0.971,P=0.021). Conclusions College students were more sensitive to public health emergencies,and the incidence of negative emotions and PTSD was significantly higher than that before the outbreak of COVID-19.More attention should be paid to female college students who were more likely to develop negative emotions.We should strengthen positive and proper propaganda via mass media and help college students understand the situation and impact of COVID-19.Furthermore,we should enhance family support for college students.The government and relevant agencies need to provide appropriate mental health services to the students under similar circumstances to avoid the deterioration of their mental well-being.
COVID-19/epidemiology* ; Cross-Sectional Studies ; Female ; Health Status ; Humans ; Male ; Students/psychology* ; Universities

Objective: To explore the heterogeneity and correlation of clinical phenotypes and genotypes in children with disorders of sex development (DSD). Methods: A retrospective study of 1 235 patients with clinically proposed DSD in 36 pediatric medical institutions across the country from January 2017 to May 2021. After capturing 277 DSD-related candidate genes, second-generation sequencing was performed to analyzed the heterogeneity and correlation combined with clinical phenotypes. Results: Among 1 235 children with clinically proposed DSD, 980 were males and 255 were females of social gender at the time of initial diagnosis with the age ranged from 1 day of age to 17.92 years. A total of 443 children with pathogenic variants were detected through molecular genetic studies, with a positive detection rate of 35.9%. The most common clinical phenotypes were micropenis (455 cases), hypospadias (321 cases), and cryptorchidism (172 cases) and common mutations detected were in SRD5A2 gene (80 cases), AR gene (53 cases) and CYP21A2 gene (44 cases). Among them, the SRD5A2 mutation is the most common in children with simple micropenis and simple hypospadias, while the AMH mutation is the most common in children with simple cryptorchidism. Conclusions: The SRD5A2 mutation is the most common genetic variant in Chinese children with DSD, and micropenis, cryptorchidism, and hypospadias are the most common clinical phenotypes. Molecular diagnosis can provide clues about the biological basis of DSD, and can also guide clinicians to perform specific clinical examinations. Target sequence capture probes and next-generation sequencing technology can provide effective and economical genetic diagnosis for children with DSD.
3-Oxo-5-alpha-Steroid 4-Dehydrogenase/genetics* ; Child ; China/epidemiology* ; Cryptorchidism/genetics* ; Disorders of Sex Development/genetics* ; Female ; Genital Diseases, Male ; Genotype ; Humans ; Hypospadias/genetics* ; Male ; Membrane Proteins/genetics* ; Penis/abnormalities* ; Phenotype ; Retrospective Studies ; Steroid 21-Hydroxylase/genetics*

Objective:To explore the nutritional status and influencing factors among children with disabilities in developed areas. Methods:From December, 2019 to January, 2020, and August to September, 2020, a total of 480 caregivers of children with disabilities aged two to 18 years in Shanghai were investigated their heights and weights, and the body mass index (BMI) was calculated. The influencing factors were analyzed from the dimensions of children's personal, family and social characteristics based on the Ecological System Theory. Chi-square test and binary Logistic regression model were used to analyze the influencing factors associated with the nutritional status of children with disabilities. Results:The prevalence of thinness, overweight and obesity in 480 children was 23.75%, 13.54% and 13.33%, respectively. Multivariate Logistic regression analysis showed that potato intake (OR = 0.420, 95%CI 0.197 to 0.893, P < 0.05) and caregivers' perception of child's weight (OR _underweight = 4.188, 95%CI 1.488 to 11.787, P < 0.01) were associated with children's thinness. Types of disability (OR _autism= 0.142, 95%CI 0.034 to 0.591, P < 0.01), the role of caregiver (OR _father= 5.519, 95%CI 1.110 to 27.440, P < 0.05), and caregivers' perception of the child's weight (OR _overweight = 5.669, 95%CI 1.112 to 28.903, P < 0.05) were associated with children's overweight/obesity. Conclusion:The prevalence of malnutrition among children with disabilities in Shanghai is higher than those typically-developing, especially thinness and obesity. The nutritional status is greatly affected by the type of disability, dietary intake and family characteristics.

Objective:To explore the quality of life of caregivers of children with disabilities and its influencing factors. Methods:From December, 2019 to January, 2020, and August to September, 2020, a total of 496 family caregivers of children with disabilities were surveyed in Shanghai. The 12-item Short-form Health Survey (SF-12) was used to measure the quality of life of 496 caregivers, and multiple linear regression was performed to analyze the related factors. Results:The score of physical component summary (PCS) of caregivers was (51.67±8.11), and the score of mental component summary (MCS) was (42.10±12.66). The scores of PCS were lower in caregivers with children aged 6 to 18 years (B = -1.783, 95%CI -3.279 to -0.287, P = 0.020), children with emotional instability (B = 2.719, 95%CI 1.254 to 4.184, P < 0.001), female caregivers (B = -3.765, 95%CI -6.578 to -0.953, P = 0.009), and caregivers who were relatively dissatisfied with the policy (B = 1.973, 95%CI 0.367 to 3.578, P = 0.016); and were higher in caregivers with children with speech disabilities (B = 3.463, 95%CI 0.053 to 6.873, P = 0.047). The types of disabilities of children (B_hearing = 9.465, 95%CI 5.107 to 13.823, P < 0.001; B_undetermined = 5.999, 95%CI 1.558 to 10.441, P = 0.008), playmates of children (B = 2.626, 95%CI 0.352 to 4.901, P = 0.024), education level of caregivers (B_{high middle school} = -4.701, 95%CI -8.028 to -1.374, P = 0.006; B_{high school} = -3.610, 95%CI -6.604 to -0.615, P = 0.018), family size (B = 2.616, 95%CI 0.479 to 4.753, P = 0.017) and per capita monthly income (B _{< 5000 Yuan}= -6.572, 95%CI -9.136 to -4.008, P < 0.001; B_{5000 to < 10000 Yuan} = -4.932, 95%CI -7.544 to -2.319, P < 0.001) were associated with the scores of MCS. Conclusion:The quality of life, especially the mental health, of caregivers of children with disabilities is poor. The influencing factors cover multiple dimensions such as caregivers, children, family and social environment.

Objectives:To systematically analyze the framework and contents of World Health Organization (WHO) policy and action strategies on rehabilitation using the theory of WHO health service components, to explore the theoretical bases, methodology, framework and core elements of WHO's international rehabilitation policy. Methods:WHO has launched rehabilitation-related policy documents, mainly including Rehabilitation in Health Systems, Rehabilitation in Health Systems: Guide for Action, Rehabilitation Indicator Menu: a tool accompanying the Framework for Rehabilitation Monitoring and Evaluation (FRAME), Template for Rehabilitation Information Collection (TRIC): a tool accompanying the Systematic Assessment of Rehabilitation Situation (STARS), and established systems of international rehabilitation policy architecture system. Using content analysis, this study analyzed in detail the theoretical basis and methodology of international rehabilitation policy, the policy framework, and the core elements of the action strategy and priority areas of rehabilitation service development in perspective of WHO six building blocks of health system, namely leadership and governance, financing, human resources for health, service delivery, medical technology, and health information systems. Results:WHO rehabilitation policy is developed based on WHO's theories of person-centered health services, social determinants of health, and functioning, disability and health of International Classification of Functioning, Disability and Health. WHO rehabilitation policy recognized that the development of rehabilitation was an important pathway achieving United Nations 2030 Sustainable Development Goals 3, ensure healthy lives and promote well-being for all at all ages, i.e. Unlversal Health Coverage. This paper systematically analyzed WHO's international policy framework, action strategies, and development areas, content and priorities in six major areas: leadership and governance, financing, human resources for health, service delivery, medicine and technology, and health information systems. WHO rehabilitation policies advocates to develop national rehabilitation plans, to establish and improve rehabilitation leaderships and the development of mechanism and capacity of rehabilitation governance, to develop multiple approaches of rehabilitation financing, to integrate rehabilitation into health service system, provides different levels of rehabilitation services in the health service continuum, and to build networks of service delivery, to train professionals, to foster rehabilitation information system within health system, to enhance service quality and service coverage, to focus on key areas and priority programs to meet the diverse needs of different populations, and achieve universal health coverage; to include assistive technology into the rehabilitation service system as a field of medicine and technology; and to collect information on functioning and rehabilitation needs, outcomes and impacts of rehabilitation services in the health information system, and conduct evidence-based researches on rehabilitation systems. Conclusion:The framework and contents of WHO's international rehabilitation policies have systematically reviewed at the macro, meso, and micro levels with the perspective of WHO six building blocks of the health system. The goal of rehabilitation development is to achieve universal rehabilitation coverage. The conceptual theories of rehabilitation are based on the theories of people-centered health services and social determinants of health. Rehabilitation is an important initiative to achieve the United Nations 2030 Sustainable Development Goals. The international rehabilitation health policy system is built on six major areas of rehabilitation: leadership and governance, rehabilitation financing, rehabilitation human resources, rehabilitation service delivery, rehabilitation-related medicine and technology, and rehabilitation and health information system. The policy and action strategies for rehabilitation development, as well as specific implementation paths and methods, at macro, meso and micro levels: theory and policy, policy action, and implementation methods and tools have been reviewed and discussed. The implementation of the WHO rehabilitation policies advocates to take the following actions: strengthening the leadership, governance, planning and coordination capacity of rehabilitation services; constructing a reasonable rehabilitation financing mechanism and raising necessary funds for rehabilitation; improving the training and guarantee mechanism of rehabilitation human resources; enhancing the professional capacity of rehabilitation personnel, improving the capacity of rehabilitation service delivery and improving service quality; improving the quality and accessibility of assistive products and assistive technology services; establishing health information system covering functioning, disability and rehabilitation, and conducting scientific researches on rehabilitation.