中华预防医学杂志最新文献

Objective: To analyze the effect of Iron deficiency anemia (IDA) and Black stain (BS) on the microbial community of dental plaque. Methods: A total of 136 preschool children aged 3 to 6 years old from 12 kindergartens in Shinan District and Shibei District of Qingdao City were investigated by using a cluster sampling method from April to May 2019. They were divided into two groups based on oral examination: the early childhood caries (ECC) group and the caries-free (CF) group. According to whether they had IDA and BS, they were further divided into four groups: the IDA with caries (IDA-ECC) group, the non-IDA with caries (NIDA-ECC) group, the BS without caries (BS-CF) group and the non-BS without caries (NBS-CF) group. The gingival plaque of the study subjects was collected. The 16S rRNA gene was sequenced by using Illumina MiSeq high-throughput sequencing technology. The composition, community structure and different bacteria genera of the microbial communities between the groups were compared and analyzed. Potential biomarkers within each group were further identified by linear discriminant analysis of effect size (LEfSe). Results: The 136 children were aged (5.11±0.87) years old, with 80 boys (58.82%). There were statistically significant differences in the microbial composition, structure and function of oral plaque between the ECC and CF groups (P<0.05). There were statistically significant differences in the microbial richness and diversity of oral plaque between the IDA-ECC and NIDA-ECC groups (P<0.05). There was no significant difference in microbial diversity index between the BS-CF and NBS-CF groups (P>0.05). The LEfSe analysis results showed that 41, 31 and 9 taxa with different relative abundance were identified between the ECC and CF groups, IDA-ECC and NIDA-ECC groups, and BS-CF and NBS-CF groups, respectively. Conclusion: IDA and BS have an effect on the microecological diversity and microbial community function of oral plaque in young children with early childhood caries.

Objective: To study the correlation between myopia growth and physical development of primary school student in Shihezi area of Xinjiang Uyghur Autonomous Region by measuring the ocular biometry and physical parameters of the eye, and to provide an objective basis for the development of myopia prevention and control. Methods: A cross-sectional study design was used. The Grade 1-6 students from 33 schools in Shihezi area were randomly selected in October 2023. The children were classified according to age into the low age group (6-9 years) and the high age group (10-13 years).The children's height, weight, axial length (AL), maximum keratometry (steepest keratometry, K1), and minimum keratometry (flattest keratometry, K1) were measured. The body mass index (BMI), keratometric astigmatism (ΔK), mean keratometry (K), corneal radius (CR) and AL/CR were calculated. Correlation analyses were performed between ocular biometry and physical parameters. LASSO regression analysis was used to screen the best variables, and linear regression models were constructed after adjusting for confounding factors of age and sex. Results: A total of 3 986 children aged 6-13 years were included in this study, including 2 094 boys (52.53%) and 1 892 girls (47.47%); 2 162 in the lower age group and 1 824 in the upper age group. Girls had higher K, ΔK and AL/CR values than boys (43.38 D vs 42.7 D, t=-7.84,P<0.01; 1.1 D vs 1.01 D, t=-2.14,P=0.03; 2.97 vs 2.96, t=3.32,P=0.02). Boys had higher AL, height, weight and BMI than girls (23.47 mm vs 23.02 mm, t=13.77,P<0.01; 1.34 m vs 1.33 m, t=3.02,P=0.03; 32 kg vs 29.5 kg, t=7.82,P<0.01; 17.4 vs 16.52, t=10.36, P<0.01). LASSO regression was used to screen the 3 physical parameter variables (height, weight, and BMI) to determine that height was the best physical parameter variable for AL/CR. After adjusting for confounders, it was shown that in the low age group (6-9 years), there was a significant positive correlation between children's height and AL/CR (b=0.174, 95%CI: 0.106 to 0.241, P<0.001), whereas in the high age group (10-13 years), there was no correlation between children's height and AL/CR (b=0.086, 95%CI:-0.038 to 0.21, P=0.174). Conclusion: There was a positive correlation between height and myopia growth in the lower age group of children in Shihezi area, Xinjiang Uyghur Autonomous Region; there was no correlation between height and myopia growth in the higher age group.

Pathogenic microorganisms serve as a crucial material foundation for life sciences and the progression of the biotechnology industry, and they also constitute an essential prerequisite for scientific innovation. Over the past century, global initiatives aimed at the collection and utilization of microorganisms have been instrumental in facilitating fundamental scientific research and fostering advancements in biotechnology. This article provides a comprehensive review of the history of culture collections of human-infecting pathogenic microorganisms in China, with a specific emphasis on developments over the past two decades. It delineates and consolidates four distinct stages of development along with their notable achievements. Additionally, the paper examines the positioning, responsibilities, development strategies, and measures associated with culture collections in this new historical context, with the objective of offering significant technical support for the monitoring and early warning of potential global pandemics in the future, thereby ensuring national biosecurity.

Objective: To investigate the level of serum-neutralizing antibodies against Coxsackievirus A6 (CVA6) in a healthy population in Tianjin City from 2014 to 2020. Methods: From March 2014 to March 2020, 5 492 healthy volunteers were recruited in Tianjin City. The demographic information, personal hygiene habits, living environment hygiene, contact history with hand, foot and mouth disease cases within 6 months before the survey, history of upper respiratory tract infection, and medical history of the subjects were investigated using a self-designed questionnaire. Venous blood was collected from the volunteers, and the level of serum anti-CVA6 IgG neutralizing antibodies was determined by the micro-neutralization assay. The level of CVA6-neutralizing antibodies was compared in different years, regions, and age groups, and the influencing factors in healthy individuals were analyzed by an ordered logistic regression model. Results: The age of 5 492 healthy volunteers ranged from 0 to 77, with M (Q₁, Q₃) of age being 21 (7, 32) years old, and a male-to-female ratio of 1∶1.09. The high, medium and low levels of CVA6-neutralizing antibodies among the volunteers were 5.39% (296), 30.35% (1 667) and 64.26% (3 529). The proportion of volunteers with high levels of CVA6-neutralizing antibodies decreased from 54.63% (437/800) in 2014 to 30.01% (229/763) in 2020, and it also decreased with age (all P values <0.001). The results of the ordered logistic regression model analysis showed that compared with those aged >35 years, volunteers aged 0-5 years had higher levels of CVA6-neutralizing antibodies [OR (95%CI): 1.39 (1.16-1.67)]. Compared with those who did not wash their hands after going out and had poor living environments, volunteers who washed their hands after going out, had good and general living environments and had lower levels of CVA6-neutralizing antibodies [OR (95%CI): 0.80 (0.70-0.91), 0.52 (028-0.88) and 0.54 (0.31-0.96), respectively]. Conclusion: The level of CVA6-neutralizing antibodies in Tianjin City remains at a relatively high level from 2014 to 2020 and shows a decreasing trend over the years.

Allergen-specific immunotherapy is the only etiological treatment that can prevent the progression of allergic diseases at present. Cluster immunotherapy is an improved immunotherapy regimen, which shortens the dose escalation period from 4-6 months in conventional regimen to 1-8 weeks. In the past, there was no consensus or guideline to guide the standardized application of subcutaneous cluster immunotherapy of inhaled allergens in China. Based on relevant research evidence at home and abroad and the opinions of industry experts, this consensus systematically expounded the indications and contraindications of cluster immunotherapy, and proposed that the cluster scheme took effect earlier than the conventional scheme, with similar incidence of systemic allergic reaction with the conventional scheme. At the same time, the risk factors and preventive measures of systemic allergic reaction caused by cluster immunotherapy were emphasized. This consensus aims to improve the understanding of cluster immunotherapy among medical staff in China and guide the standardized application and management of cluster immunotherapy.

Ragweed, as an exotic invasive species, which is one of the most important allergens for hay fever, has been invading China for more than 80 years. The increasing number of people with hay fever makes effective treatment, as well as the prevention and control of pollen transmission critical. This article delves into a comprehensive research summary focusing on the allergenic properties of ragweed pollen, its pathogenic characteristics, epidemiological patterns, monitoring and control measures, as well as concentrated management approaches. By exploring these aspects, it provides a reference framework for scientifically sound integrated control methods that encompass biological management, pharmacological treatments, and specific immunotherapy, ultimately aiming to prevent and mitigate the effects of ragweed pollen exposure.

Cow's milk protein allergy is the most common food allergy in infants and young children, and its prevalence has been increasing in recent years. The use of appropriate diagnostic methods is essential for the management of patients. Oral food challenges are not yet widely used in clinical practice, and new and more effective methods are still being sought, including component resolved diagnosis. Component resolved diagnosis has been introduced into the field of clinical allergy, which provides a new understanding for the diagnosis and treatment of allergic diseases. This article reviews the clinical application of component resolved diagnosis in IgE-mediated cow's milk protein allergy, especially the components of cow's milk protein allergy and the identification of co-sensitization, the research progress of diagnosis, the prediction of the development of tolerance and the risk of allergic reactions, the guidance of allergen immunotherapy and the development of personalized diet for patients, in order to provide a basis for the diagnosis, treatment and prevention of IgE-mediated cow's milk protein allergy.

To investigate the drug-resistance mutations and treatment of hospitalized children with Mycoplasma pneumoniae pneumonia (MPP) in Hunan Province. Children with pneumonia, who were hospitalized in the pediatric ward of the Second Xiangya Hospital of Central South University from January 1, 2023, to December 31, 2023, were enrolled in this study, and their clinical data was also collected. The targeted next-generation sequencing (tNGS) was used to detect Mycoplasma pneumoniae (MP) infection and drug-resistance mutations, and the drug-resistance and treatment in children with MPP were also analyzed. A total of 125 children with pneumonia were involved in this study, including 70 children in the MPP group and 55 children in the bacterial pneumonia group. The results showed that there were 41 boys and 29 girls with an average age of (6.50±3.45) years, with the most common group being the school-age group (age≥6 years). The clinical symptoms were characterized by fever and cough. Laboratory examination showed that the white blood cell and neutrophil counts in the MPP group were lower than those in the bacterial pneumonia group, while the lymphocyte ratio and hemoglobin levels in the MPP group were higher than those in the bacterial pneumonia group, with statistically significant differences (all P<0.05). Twelve children (17.14%) in the MPP group had severe pneumonia, and all children with severe pneumonia had 23Sr RNA A2063G and/or A2064G mutations. The tNGS detected 60 cases of MPP resistance gene mutations, including 59 cases (98.33%) of A2063G mutation in 23Sr RNA and one case (1.67%) of A2064G mutation in 23Sr RNA. There was a significant difference in the positive rate of drug-resistance mutations among patients of different age groups (χ²=7.991, P=0.021). A total of 63 children (90.00%) with MPP were treated according to the results of drug-resistance mutations, and seven children (70.00%) with MPP without drug-resistance mutations were treated according to the tNGS results. In children with the drug resistance of MPP, 46 cases (95.83%) of non-severe pneumonia and 10 cases (83.33%) of severe pneumonia were treated according to the tNGS results. All patients had a good prognosis, with no deaths reported and a median hospital stay M (Q₁, Q₃) of 9 (7, 11) days. In conclusion, MPP is more common in children aged≥6 years old in Hunan Province, and the detection of drug-resistant mutations includes A2063G and A2064G, with A2063G being the main one. The positive rate of drug-resistant mutations is related to age.

With the current climate change characterized by global warming becoming more severe, the increasing frequency of extreme weather events such as heatwaves, cold waves, sandstorms, floods, and droughts caused by climate change has posed serious threats to human health. Climate change is not only a major public health challenge in China, but also a focus problem in global. This article focuses on climate-sensitive diseases and summarizes and reviews the latest scientific facts and progress on how climate change impacts infectious diseases and chronic non-communicable diseases. It further proposes measures and strategies for addressing climate-sensitive diseases with public health in center, providing ideas and suggestions for scientifically addressing climate-sensitive diseases in the future.