ABSTRACT
Objective To analyze the epidemiological characteristics of norovirus infectious diarrhea in the active monitoring of foodborne diseases in Jiangsu Province from 2015 to 2020, so as to provide reference for the prevention and control of foodborne diseases caused by norovirus. Methods Norovirus positive diarrhea cases were collected from sentinel hospitals in 13 districts and cities of Jiangsu Province, and their epidemiological and clinical characteristics were analyzed. Results Atotal of 3 620 norovirus positive cases were detected and isolated from 61 489 samples. The main serotype was GII (71.97%), the onset season was winter and spring, and the onset age was 1-3 years old and 14-34 years old. There was no significant difference in norovirus positive rate between different sexes, and the main symptom was diarrhea (incidence rate was 92.10%), Meat and meat products (20.20%) were the main types of suspected exposed foods. Conclusion Norovirus infection has obvious seasonal characteristics, and the population is generally susceptible. It is high in children and young people, and meat food was the main suspicious exposure food. We should continue to improve the ability of active monitoring, identification, early warning and control of foodborne diseases, so as to reduce the occurrence of foodborne diseases.
ABSTRACT
Objective To analyze the correlation between intestinal flora changes and neonatal necrotizing enterocolitis (NEC)through 16S rRNA metagenomic sequencing and bacterial culture. Methods From September 2018 to March 2019, 10 NEC cases and 6 controls were randomly selected in the neonatal ICU ward of Nanjing maternal and child health care hospital to analyze the 16S rRNA metagenomic diversity of the for intestinal flora. The fecal samples and corresponding environmental samples were corrected from 51 cases of NEC children and their case controls to isolate and culture Clostridium. Results The dispersion of samples within the case group was smaller than that of the control group, and the sample diversity was higher than that of the control group. In the isolation and culture of Clostridium, the overall detection rate of Clostridium in the case group was 43.14% (22/51), and the detection rate of Clostridium butyricum was the highest (19.61%, 10/51). There was a statistical difference between the two groups (χ2=5.85, P=0.015 58). All Clostridium strains did not carry the A, B and E type neurotoxin genes. Conclusion: Increased intestinal flora diversity, intestinal flora abundance and changes in the abundance of Clostridium may be closely related to the intestinal environment of children with NEC; Clostridium, especially Clostridium butyricum, may be related to the occurrence of NEC.
ABSTRACT
Objective To analyze the genotype-phenotype correlation in 5 families with congenital ectopia lentis (CEL) accompanied with cardiovascular abnormal manifestation.Methods Detailed clinical data of 15 family members in 5 families were collected from August 2017 to March 2018 in Zhongshan Ophthalmic Center,including examination of the condition of lens before and after mydriasis by slit-lamp,evaluation of the cardiovascular system using transthoracic echocardiography,and evaluation of the degree of involvement of the subjects' skeletal system using X-ray images.Genomic DNAs were extracted from whole blood sample of the 5 probands and 10 relatives,and screened for FBN1 mutation by targeted exome sequencing.The possible genotype-phenotype correlation was analyzed by reviewing previous literatures into these mutation sites.The study followed the principles of the Helsinki Declaration and written informed consent was obtained from each subject prior to any examination.Results All of the five probands were diagnosed as CEL accompanied with cardiovascular abnormal manifestation.FBN1 gene mutations were identified in all of the five probands,including four missense mutations (c.2741G＞T,c.2585G＞T,c.1633C＞T,c.4260C＞G) and one splicing mutation (c.2114-1G＞C).It was predicted that all of the 5 mutations would alter the protein structure.Conclusions FBN1 gene has a high degree of clinical heterogeneity,and the early detection of ocular phenotypes combined with genetic screening is of great significance in the diagnosis of cardiovascular abnormalities.