Objective: To investigate the characteristics and risk factors of an outbreak of acute hemorrhagic conjunctivitis (AHC) in a boarding middle school in Guangdong Province, in order to provide a scientific evidence for effective prevention and control of campus AHC outbreaks. Methods: From September 1st to 28th 2023, case identification was conducted among 559 students and 60 faculty members using standardized definition. Descriptive analysis was conducted on the three distrubution patterns of the outbreak. Questionnaires were designed, and a case-control study was adopted to analyze the possible risk factors of the disease transmission. The propensity score matching (PSM) method was used to control the difference of baseline data. Results: A total of 269 cases of AHC were identified, with an attack rate of 43.46%. The pathogen was confirmed as Coxsackie virus A24 variant (CA24v). Among these, 264 cases were students (attack rate of 47.23%) and 5 were staff (attack rate of 8.33%). A total of 153 pairs of PSM were successfully matched. After PSM matching, there were no statistically significant differences in gender, grade and class between the case group and the control group ( χ 2=0.12, 5.41, 11.24, P >0.05). The results of multivariate Logistic regression analysis showed that middle school students whose towels contacted with others ( OR =1.81), and direct contact with other AHC cases recently ( OR =4.89) were more likely to have AHC; while wearing glasses ( OR =0.43) and frequent use of hand sanitizer ( OR = 0.37 ) were less likely to have AHC ( P <0.05). Conclusion The outbreak of AHC is caused by CA24v, demonstrating rapid spread and extensive impact within the school setting.

Purpose To investigate the expression of chiti-nase-3-like protein 1(CHI3L1)in esophageal squamous cell carcinoma(ESCC)and its correlations between CHI3L1 and molecules associated with the Wnt/β-catenin signaling pathway.Methods Paraffin-embedded tissue specimens from 119 ESCC patients and 60 normal esophageal tissues were retrospectively selected.Immunohistochemistry was used to detect the protein expression levels of CHI3L1 and Wnt/β-catenin signaling path-way related molecules in the above tissues,and the ectopic pro-tein expression levels of CHI3L1,TCF4,Cyclin D1,APC andβ-catenin in ESCC patients'tissues and normal esophageal tis-sues were compared.The survival of ESCC patients was followed up.Results Compared with normal esophageal tissue,the pos-itive rates of CHI3L1,TCF4,Cyclin D1 and β-catenin in ESCC were higher(63.0％,69.7％,68.1％and 67.2％,respec-tively),and the positive rates of APC were lower(41.2％).The expression levels of CHI3L1,TCF4,Cyclin D1 and β-cate-nin were positively correlated with each other(P＜0.05),but negatively correlated with APC(P＜0.05).CHI3L1 protein was associated with ESCC tumor volume,invasion depth,lymph node metastasis,and pTNM stage(P＜0.05).High expression of CHI3L1,TCF4,Cyclin D1 or abnormal high expression of β-catenin protein was associated with poor prognosis in ESCC pa-tients,suggesting shortened survival time(Log-rank=10.121,Log-rank=34.896,Log-rank=34.923,Log-rank=4.082,all P＜0.05).Conclusion In ESCC,the high expression of CHI3L1 is closely related to the activation of Wnt/β-catenin sig-naling pathway,suggesting that CHI3L1 may participate in the occurrence and development of ESCC through abnormal activa-tion of Wnt/β-catenin signaling pathway.

Purpose To investigate the expression of chiti-nase-3-like protein 1(CHI3L1)in esophageal squamous cell carcinoma(ESCC)and its correlations between CHI3L1 and molecules associated with the Wnt/β-catenin signaling pathway.Methods Paraffin-embedded tissue specimens from 119 ESCC patients and 60 normal esophageal tissues were retrospectively selected.Immunohistochemistry was used to detect the protein expression levels of CHI3L1 and Wnt/β-catenin signaling path-way related molecules in the above tissues,and the ectopic pro-tein expression levels of CHI3L1,TCF4,Cyclin D1,APC andβ-catenin in ESCC patients'tissues and normal esophageal tis-sues were compared.The survival of ESCC patients was followed up.Results Compared with normal esophageal tissue,the pos-itive rates of CHI3L1,TCF4,Cyclin D1 and β-catenin in ESCC were higher(63.0％,69.7％,68.1％and 67.2％,respec-tively),and the positive rates of APC were lower(41.2％).The expression levels of CHI3L1,TCF4,Cyclin D1 and β-cate-nin were positively correlated with each other(P＜0.05),but negatively correlated with APC(P＜0.05).CHI3L1 protein was associated with ESCC tumor volume,invasion depth,lymph node metastasis,and pTNM stage(P＜0.05).High expression of CHI3L1,TCF4,Cyclin D1 or abnormal high expression of β-catenin protein was associated with poor prognosis in ESCC pa-tients,suggesting shortened survival time(Log-rank=10.121,Log-rank=34.896,Log-rank=34.923,Log-rank=4.082,all P＜0.05).Conclusion In ESCC,the high expression of CHI3L1 is closely related to the activation of Wnt/β-catenin sig-naling pathway,suggesting that CHI3L1 may participate in the occurrence and development of ESCC through abnormal activa-tion of Wnt/β-catenin signaling pathway.

Humans ; Severe Acute Respiratory Syndrome ; diagnosis ; therapy