1.Characteristics of rabies-exposed population in Wenzhou City from 2014 to 2023
WANG Jian ; XIE Huasen ; CHI Haichao ; LI Xiaowei ; LE Siyu ; NI Chaorong
Journal of Preventive Medicine 2024;36(8):710-713
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.
2.Epidemiological investigation of the first reported case of coronavirus disease 2019(COVID-19)in Zhejiang Province
Feng LING ; Shelan LIU ; Chaorong NI ; Jinren PAN ; Ying LIU ; Enfu CHEN ; Xianghua YU
Journal of Preventive Medicine 2020;32(2):109-112
Objective:
To conduct an epidemiological investigation on the first reported case of coronavirus disease 2019 (COVID-19) in Zhejiang Province, so as to provide reference for prevention and control of the disease.
Methods :
According to the COVID-19 Diagnosis and Treatment Program (Trial) and the COVID-19 Prevention and Control Program (Trial) issued by National Health Commission of China, a field investigation was employed on a case of fever from Wuhan reported by Wenzhou in January 15, 2020; the real-time reverse transcription polymerase chain reaction (RT-PCR) assay was performed to detect the nucleic acid of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) from the sputum specimens or throat swabs of the case; the close contacts of the case were tracked down; relevant prevention and control measures were implemented.
Results :
The case had lived in Wuhan for long. On January 4 of 2020, he felt cold and uncomfortable without obvious inducement, and drove back to Wenzhou with his wife. He had fever (up to 39 ℃), cough and expectoration on the next day. On January 9, the chest computed tomographic (CT) scan showed bilateral high-density patchy shadowing with blurred edges. On January 16, his throat swab and sputum samples were collected and sent to Zhejiang Provincial Center for Disease Control and Prevention (CDC) for detection of SARS-CoV-2. The result turned out to be positive on January 17, then was rechecked and confirmed by Chinese CDC on January 20. Two weeks before the onset of the disease, the patient was engaged in the door-to-door persuasion of installing elevators in an old residential area of Wuhan, and he denied any connection with other COVID-19 cases,markets,(sick or dead) poultry or poultry products. Totally 26 close contacts were identified and kept in quarantine. During this period,three of them developed fever or respiratory symptoms, but were excluded from COVID-19. On the afternoon of January 16,the health system of Zhejiang Province and Wenzhou City launched an emergency plan and implemented a series of prevention and control measures such as isolation and treatment of cases,screening and isolation of close contacts,and public health education.
Conclusion
According to the epidemiological history,clinical features and laboratory test Results,the patient was identified as the first reported case of COVID-19 in Zhejiang Province.
3.Epidemiological characteristics of coronavirus disease 2019 in Wenzhou
LI Ling ; XIA Ziqi ; YU Xianghua ; NI Chaorong ; PAN Qiongjiao ; XU Feng ; LI Wancang ; ZHANG Xiaoming ; ZENG Shidian
Journal of Preventive Medicine 2020;32(6):555-558
Objeetive :
The epidemiological characteristics of confirmed cases of the 2019 novel coronavirus diseases (COVID-19) which was reported in Wenzhou by February 28,2020 were described and analyzed to provide evidence for prevention and control measures in next stage.
Methods:
The field investigation method was employed on all suspected and confirmed cases. The data of time,spatial and population distribution, source of infection and detective routes of all confirmed cases of COVID-19 in Wenzhou were collected and extracted from the reports of field investigation and the National Diseases Prevention and Control Information System.
Results:
As of February 20,2020,504 confirmed cases of COVID-19 were diagnosed in Wenzhou, which included one death case. Among all 13 counties, the highest number of confirmed cases were distributed in Yueqing,Ruian and Lucheng. Among 504 cases, the male to female ratio was reported as 1.14:1. The youngest case was 2 years old while the oldest case was 93 years old. Most of the confirmed cases were among people between the ages of 25 and 64 years old. The most common occupation of the confirmed cases was businessman,which accounts for 29.76% (150 cases). Clinical symptoms of the first confirmed case of COVID-19 in Wenzhou occurred on January 4, 2020. Approximately 70% of cases had the first symptoms from January 19 to February 1. The daily number of new cases on January 24 and January 26 were the highest while the number of new cases per day declined significantly after February 2, and there were no new cases after February 14. Among all confirmed cases, the infection source of 61.71% cases were related to Wuhan. As of February 20, 2020, a total of 79 clusters were reported in Wenzhou, which involved 330 cases. Approximately 30% of confirmed cases came to hospitals unaccompanied by community staffs, and cases which confirmed after February 13 were basically found in central isolation locations or by grid checkers.
Conclusions
The main reason for the high case numbers of COVID-19 in Wenzhou, in Zhejiang province, was the high number of wenzhou citizens who work in Wuhan. Imported cases account for the most confirmed cases during the early period, while mainly confirmed cases were local cases during the middle and late periods. The outcomes suggest the prevention and control measures employed by Wenzhou government, which included closed-loop control and quantitative control, have achieved remarkable results and the epidemic of COVID-19 in Wenzhou has been initially controlled.