Objective:To analyze the epidemiological and clinical characteristics of leptospirosis in Wenzhou City, and to provide a scientific basis for formulating prevention and control strategies of leptospirosis in Wenzhou City.Methods:Information on leptospirosis case from 2019 to 2023 was collected from the China Information System for Disease Control and Prevention. Descriptive epidemiological methods were used to analyze the three-dimensional distribution and clinical manifestations of leptospirosis.Results:From 2019 to 2023, the annual average incidence rate of leptospirosis in Wenzhou City was 0.43/100 000, and the annual average mortality was 0.01/100 000. The incidence rate was the highest in 2021 (0.74/100 000), and there was a statistically significant difference in the incidence rate over the five years ( χ2 = 35.48, P < 0.001). Cases were reported in all regions in Wenzhou City except for Dongtou District and Longgang City, with Yongjia County had the highest number of cases (114 cases). The impact rate of streets/townships was 35.14% (65/185), among them Yongjia County had the highest impact rate of steets/townships (86.36%, 19/22). The onset season was from August to October (88.83%, 159/179), with a male to female ratio of 4.97 ∶ 1.00 (149/30). The age group of 61 - 70 years old was the most affected (39.66%, 71/179), and farmers were the main occupation (70.95%, 127/179). Twenty-six point eighty-two per cent (48/179) of the cases had a clear history of animal contact within one month before onset, and 68.16% (122/179) had a history of contact with contaminated water. The main clinical type was influenza-typhoid type (23.46%, 42/179), with the main clinical manifestations being fever (84.92%, 152/179), chills (55.87%, 100/179), and fatigue (62.57%, 112/179). Twelve point twenty-nine per cent 12.29% (22/179), 8.38% (15/179), and 22.91% (41/179) of cases showed conjunctival congestion, lymph node enlargement, and gastrocnemius muscle tenderness, respectively. Clinical outcomes showed that 73.74% (132/179) of the cases recovered or improved, and 3 cases died. Conclusions:From 2019 to 2023, the overall prevalence of leptospirosis in Wenzhou City is at a low level, but there are deaths that need to be taken seriously. In order to control the disease, continuous monitoring should be carried out, health education for relevant populations should be strengthened, and the risk of leptospirosis should be reduced.

Objective:To analyze the epidemiological and clinical characteristics of leptospirosis in Wenzhou City, and to provide a scientific basis for formulating prevention and control strategies of leptospirosis in Wenzhou City.Methods:Information on leptospirosis case from 2019 to 2023 was collected from the China Information System for Disease Control and Prevention. Descriptive epidemiological methods were used to analyze the three-dimensional distribution and clinical manifestations of leptospirosis.Results:From 2019 to 2023, the annual average incidence rate of leptospirosis in Wenzhou City was 0.43/100 000, and the annual average mortality was 0.01/100 000. The incidence rate was the highest in 2021 (0.74/100 000), and there was a statistically significant difference in the incidence rate over the five years ( χ2 = 35.48, P < 0.001). Cases were reported in all regions in Wenzhou City except for Dongtou District and Longgang City, with Yongjia County had the highest number of cases (114 cases). The impact rate of streets/townships was 35.14% (65/185), among them Yongjia County had the highest impact rate of steets/townships (86.36%, 19/22). The onset season was from August to October (88.83%, 159/179), with a male to female ratio of 4.97 ∶ 1.00 (149/30). The age group of 61 - 70 years old was the most affected (39.66%, 71/179), and farmers were the main occupation (70.95%, 127/179). Twenty-six point eighty-two per cent (48/179) of the cases had a clear history of animal contact within one month before onset, and 68.16% (122/179) had a history of contact with contaminated water. The main clinical type was influenza-typhoid type (23.46%, 42/179), with the main clinical manifestations being fever (84.92%, 152/179), chills (55.87%, 100/179), and fatigue (62.57%, 112/179). Twelve point twenty-nine per cent 12.29% (22/179), 8.38% (15/179), and 22.91% (41/179) of cases showed conjunctival congestion, lymph node enlargement, and gastrocnemius muscle tenderness, respectively. Clinical outcomes showed that 73.74% (132/179) of the cases recovered or improved, and 3 cases died. Conclusions:From 2019 to 2023, the overall prevalence of leptospirosis in Wenzhou City is at a low level, but there are deaths that need to be taken seriously. In order to control the disease, continuous monitoring should be carried out, health education for relevant populations should be strengthened, and the risk of leptospirosis should be reduced.

Objective: To investigate the characteristics of rabies-exposed population in Wenzhou City, Zhejiang Province from 2014 to 2023, so as to provide insights into the prevention and control of rabies. Methods: Data of rabies-exposed population in Wenzhou City from 2014 to 2023 were collected through Wenzhou Rabies-Exposed Population Summary Sheet reported by dog injury clinics. The species of animals causing injuries, exposure time, exposure grade, exposure site, and post-exposure treatment were descriptively analyzed. Results: Totally 709 900 patients were admitted to dog injury clinics in Wenzhou City from 2014 to 2023, and the exposure rate showed an increasing trend (Z=7.238, P<0.001), with an average annual exposure rate of 750.75/105. The number of cases with exposure to rabies peaked in July (79 230 cases, 11.16%) and August (78 570 cases, 11.07%). Dogs were predominant animals causing injuries (448 900 cases, 63.23%), and the exposure rate showed a downward trend (Z=-5.921, P<0.001); cats were the second (175 142 cases, 24.67%), and the exposure rate showed an upward trend (Z=23.314, P<0.001). The upper (379 695 cases, 53.49%) and lower limbs (287 521 cases, 40.50%) were the main exposure sites. There were 21 034 cases (2.96%) exposed to head and face, and the exposure rate of head and face showed an upward trend (Z=3.549, P<0.001). Grade II exposure was the most common (403 881 cases, 56.89%), and the exposure rate showed an upward trend (Z=8.769, P<0.001). The proportion of using human rabies immune globulin was 23.13% in Grade III exposed population, showing a downward trend (Z=-12.848, P<0.001). Conclusions The exposure rate of rabies in Wenzhou City showed an upward trend from 2014 to 2023, with July and August as the peak months of exposure. Injuries mainly caused by dogs, while the exposure rate of cat bites showed an upward trend. The proportion of using human rabies immune globulin needs to be improved.

Background Diabetes is a major threat to public health across the world. Studies have shown that exposure to p,p'-dichlorodiphenyldichloroethylene (p,p'-DDE) is closely related to the occurrence of type 2 diabetes mellitus. However, the relevant molecular mechanism is not clear. Objective To investigate the effects of p,p'-DDE on H19 differentially methylated region (DMR) methylation and insulin secretion of rat insulinoma cells (INS-1 cells). Methods INS-1 cells were cultured with different concentrations (0, 3.125, 6.25, 12.5, 25, 50, and 75 µmol·L⁻¹) of p,p'-DDE for 24 h, and the viability of INS-1 cells was detected by CCK-8 method. INS-1 cells were exposed to 0, 12.5, 25, and 50 µmol·L⁻¹ p,p'-DDE for 24 h in subsequent experiments. The methylation levels of 24 CpG sites in H19 DMR were analyzed by bisulfite genomic sequencing. The expression levels of insulin-like growth factor 2 (IGF2) mRNA were detected by real-time quantitative PCR. The expression levels of IGF2 and insulin-like growth factor-1 receptor (IGF1R) proteins were detected by Western blotting. The insulin secretion function of INS-1 cells was determined by glucose-stimulatedinsulin secretion test (5 and 25 mmol·L⁻¹ glucose, respectively). Results Compared with the control group, the viability of INS-1 cells increased significantly after treatment with 12.5 µmol·L⁻¹ p,p'-DDE; however, it was significantly inhibited after treatment with 50 or 75 µmol·L⁻¹ p,p'-DDE (P<0.01); therefore, 50 µmol·L⁻¹ was chosen as the maximum concentration of exposure for subsequent experiments. The 25 µmol·L⁻¹ p,p'-DDE treatment decreased the methylation levels of CpG18 and CpG22-CpG24 sites in H19 DMR, and the 50 µmol·L⁻¹ p,p'-DDE treatment decreased the methylation levels of CpG10-CpG24 sites (P<0.05 or P<0.05). Multiple concentrations (12.5, 25, and 50 µmol·L⁻¹) of p,p'-DDE down-regulated the mRNA and protein relative expression levels of IGF2 and the protein relative expression levels of IGF1R. The transcription level of IGF2 decreased to 67.8%, 68.6%, and 62.5% of the control group, the protein level of IGF2 decreased to 73.3%, 79.5%, and 80.9% of the control group, and the protein level of IGF1R decreased to 54.8%, 25.6%, and 12.9% of the control group, respectively (P<0.01). In the high glucose context, p,p'-DDE at selected concentrations inhibited the insulin secretion levels to 85.0%, 58.6%, and 49.5% of the control group, respectively (P<0.01). Conclusion p,p'-DDE could down-regulate methylation level of H19 DMR, interfere the IGF2/IGF1R signaling pathway, and inhibit insulin secretion of islet cells.

Triclosan, widely used in various personal care products, is one of the most common environmental endocrine disruptors in our life. It can be detected from water, soil and dust, and its environmental exposure level increased with consumption. Human body are exposed to triclosan through food and water, but the evidence that triclosan exposure leads to adverse health effects is not sufficient. This paper summarizes the progress of studies related to environmental concentration, population exposure and health risks of triclosan in recent years.