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ObjectiveTo analyze the epidemiological features and influencing factors of rabies in Shanxi Province，and to provide evidence to further promote the elimination of rabies in Shanxi Province. MethodsThe incidence data of rabies in Shanxi from 2011 to 2022 were collected and subjected to descriptive analysis. ResultsFrom 2011 to 2022， a total of 348 rabies cases were reported in Shanxi Province， with an average annual incidence of 0.080 3/105. The incidence of rabies showed a downward trend overall. The highest incidence was in August. The cases were mainly farmers， mostly males， and most cases were reported between 50 and 69 years old. The data of cases showed that dogs were the main animals attacking human （93.96%）. The incubation period of most cases was 1‒3 months （37.37%）.The main exposure site was hand（51.33%）. Only 2.66% cases with grade Ⅲ exposure were injected with passive immune agents. ConclusionThe incidence of rabies in Shanxi Province continues to decrease， but there are still loopholes in prevention and control measures. It is necessary to strengthen the management and immunization of dogs，health education， and standardized procedures after exposure to maintain the achievements in the prevention and control of rabies.
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ObjectiveTo analyze the clinical and epidemiological characteristics of confirmed cases of human monkeypox infection in Changning District， Shanghai， and to explore their clinical and epidemiological characteristics. MethodsClinical data from 10 reported cases of monkeypox in individuals residing in Changning District or identified by local medical institutions between July 20 and September 30， 2023， were collected. Epidemiological case investigations were conducted， and throat swabs， anal swabs， and rash swabs were collected by the treating medical institutions. Real-time fluorescence quantitative PCR was used for monkeypox virus nucleic acid testing， and descriptive epidemiological analysis was applied to analyze the epidemiological characteristics of the cases. ResultsAll 10 confirmed cases of human monkeypox infection were all young males with an average age of 35.4 years， all of whom belonged to the men who have sex with men （MSM） population， with no occupational clustering. The primary clinical symptoms included fever， rash， enlarged inguinal lymph nodes， and muscle soreness. Nine cases presented with a rash， and seven cases experienced fever symptoms. Among the 10 cases， one experienced fever， rash， enlarged lymph nodes， and muscle soreness； two had fever， rash， and enlarged lymph nodes； two had fever， rash， and systemic soreness； two had only a rash； one had fever or rash； and one was asymptomatic. Among the nine cases with a rash， the rash was mainly localized to the genital or anal area， with fewer cases presenting rashes on the limbs or trunk simultaneously. All cases reported a history of non-exclusive MSM behavior within 21 days before the onset of the disease. The interval between the last suspected high-risk exposure and the onset of symptoms was 4 to 10 days， with an average interval of 6.9 days. The time from the onset of fever to the appearance of a rash was 0 to 5 days， with an average of 1.87 days. ConclusionThe main clinical manifestations of human infection with monkeypox are fever， rash， and enlarged inguinal lymph nodes. The MSM population is a high-risk group for monkeypox infection， and its source of infection may be associated with MSM exposure. Early-stage symptoms are mild， leading to potential underdiagnosis. Additionally， patients may conceal information during the investigation process， which increases the difficulty of epidemic prevention and control.
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Objective To investigate the epidemiological characteristics of varicella public health emergency events (PHEEs) in Xinwu District from 2016 to 2020, and to provide a scientific basis for formulating prevention and control measures. Methods Data was retrieved from “Public Health Emergency Management Information System” in "Chinese Disease Control Information System" and “Jiangsu Provincial Vaccine Management Information System”. Descriptive epidemiological methods were employed to analyze the data. SPSS software was used for statistical analysis. Results A total of 35 varicella PHEEs were reported in Xinwu District from 2016 to 2020, accounting for 57.38% of all PHEEs of infectious diseases in the same period. A total of 1 033 cases were reported, with an attack rate of 1.91%. The events showed a bimodal distribution. A small peak occurred from April to June, and the number of events accounted for 17.14%. A large peak occurred from November to January of the following year, and the number of events accounted for 82.86%. All events occurred in schools. Kindergartens were the most dangerous places, and the number of events accounted for 45.71%. Preschoolers aged 3-6 years accounted for 48.83% of the total cases, and the male-to-female ratio of students was 1.40:1. Among 234 cases with a history of immunization with Varicella Attenuated Live Vaccine (VarV), the longer the time interval from the date of VarV inoculation to the data of onset, the higher the proportion of varicella cases. Varicella PHEEs reporting time was positively correlated with duration (rs=0.391 , P<0.05). Conclusion Early detection, early reporting and early isolation can effectively control the duration of the event. School varicella surveillance should be strengthened during the epidemic peak period. Preschoolers are vulnerable groups. It is suggested that VarV should be included in the inspection work for enrollment in kindergartens.
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Objective@#To investigate the epidemiological characteristics of hemorrhagic fever with renal syndrome (HFRS) in Shaoxing City from 2006 to 2022, so as provide insights into improvements of the HFRS control strategy.@*Methods@#Data pertaining to HFRS cases in Shaoxing City from 2006 to 2022 were captured from the Surveillance System of China Information System for Disease Control and Prevention. The temporal, population and regional distributions of HFRS were analyzed using the descriptive epidemiological method, and the trends in incidence of HFRS were evaluated using annual percent change (APC). @*Results@#Totally 1 022 HFRS cases were reported in Shaoxing City from 2006 to 2022, with annual average incidence of 1.22/105 and three deaths. The incidence of HFRS appeared a tendency towards a decline in Shaoxing City from 2006 to 2022 (APC=-11.101%, t=-9.930, P<0.001), and the incidence of HFRS peaked from May to June and from November to January of the next year. A higher incidence of HFRS was seen in men than in women (1.76/105 vs. 0.68/105; χ2=201.361, P<0.001). There were 714 HFRS cases at ages of 30 to 59 years (69.86%), and farmers were the predominant occupation (78.18%). The three counties with the largest number of HFRS cases included Zhuji (366 cases), Xinchang (263 cases) and Shengzhou (134 cases). The incidence of HFRS was lower in urban districts (Yuecheng, Keqiao and Shangyu) than in counties (Zhuji, Shengzhou and Xinchang) (0.58/105 vs. 1.96/105; χ2=326.880, P<0.001).@*Conclusion@#The incidence of HFRS appeared a tendency towards a decline in Shaoxing City from 2006 to 2022, and the incidence was high in late spring, early summer and winter. The HFRS cases were mainly males, young and middle-aged people, and farmers, and predominantly distributed in counties. Targeted control measures are needed.
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Objective To investigate the incidence and risk factors of severe cases of Cox A6 infected with HAND-foot-mouth disease in 1-12 years old children in Enshi city, and to provide reference for prevention and treatment of hand-foot-mouth disease. Methods From January to September 2021, hospitalized children aged 1-12 years with HFMD in Enshi city were collected. The samples of anal swabs and throat swabs were tested for Coxsackie virus A6 (Cox A6) nucleic acid, and the distribution of Cox A6 patients infected with HFMD and the proportion of severe cases in children aged 1-12 years were analyzed. Logistic regression was used to analyze the risk factors of severe cases. Results From January to September 2021, a total of 343 HFMD cases aged 1 to 12 years were reported in Enshi, among which 241 cases (70.26%) were infected with CoxA6. No death cases were reported during the period. The 241 cases of Cox A6 infected with HFMD were distributed from January to September. 129 males (53.53%) and 112 females (46.47%); 208 cases (44.40%) were mainly from 1 to 3 years old, followed by 66 cases (28.39%) from 4 to 6 years old, 45 cases (18.67%) from 7 to 9 years old, and 23 cases (9.54%) from 10 to 12 years old. Cox A6 was mainly infected with HFMD in 145 cases (60.17%) in rural areas and 96 cases (39.83%) in urban areas. 10 cases (4.15%) of Cox A6 infected HFMD were severe cases; There were significant differences in age, fever temperature, fasting blood glucose and fever time between the severe case group and the normal case group (P<0.05). Logistic multivariate regression analysis showed that fever temperature (OR=1.559, P<0.05), fasting blood glucose (OR=2.472, P<0.05) and fever time (OR=2.932, P<0.05) were independent risk factors for the occurrence of severe cases of Cox A6 infected with HFMWD in Enshi. Conclusion The incidence of Cox A6 infected with HFMD in Enshi is mainly concentrated in boys under 3 years old. Clinical treatment of HFMD children should focus on children with high fever temperature, fasting blood glucose and long fever time.
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Background Pesticide poisoning is not only a common acute poisoning, but also an indispensable public health problem. It is important to describe and analyze the epidemic characteristics and trends of pesticide poisoning for its prevention and control. Objective To understand the epidemiological characteristics and trends of pesticide poisoning in Jiaxing from 2008 to 2020, and provide a basis for making effective intervention measures. Methods The relevant information of pesticide poisoning cases in Jiaxing from 2008 to 2020 was collected through the Occupational Disease and Occupational Health Information Monitoring System of the China Disease Prevention and Control Information System, and the demographic information was obtained from the statistical yearbook of Jiaxing. Joinpoint regression models were used to analyze trends in overall, gender, age, season, type of poisoning, and type of pesticide among poisoned individuals. Results A total of 3109 cases of pesticide poisoning were reported in Jiaxing City from 2008 to 2020. The overall pesticide poisoning incidence trended downward from 2008 to 2014, with an annual percent change (APC) of −9.0% (95%CI: −16.6%-−0.7%). The female pesticide poisoning incidence trended downward from 2008 to 2015, with an APC of −8.6% (95%CI: −13.9%-−2.9%). The 18-34 age group showed a decreasing trend of pesticide poisoning incidence from 2008 to 2015, with an APC of −11.0% (95%Cl: −17.4%-4.3%), and an increasing trend from 2015 to 2020, with an APC of 18.5% (95%Cl: 4.7%-34.0%). The >60 age group showed a decreasing trend of pesticide poisoning incidence from 2008 to 2014, with an APC of -12.9% (95%Cl: −20.4%-−4.7%). The second quarter showed an increasing trend of pesticide poisoning incidence from 2010 to 2020, with an APC of 4.4% (95%CI: 0.3%-8.5%); the third quarter showed a decreasing trend, with an APC of −4.9% (95%CI: −8.6%-−1.1%); the fourth quarter showed an increasing trend from 2015 to 2020, with an APC of 17.8% (95%CI: 4.4%-33.0%). Productive poisoning showed a decreasing trend, with an APC of −11.1% (95%CI: −16.2%-−5.7%); self-poisoning showed a decreasing trend from 2008 to 2014, with an APC of -9.5% (95%CI: −17.4%-−0.7%), and an increasing trend from 2014 to 2020, with an APC of 10.2% (95%CI: 0.5%-20.8%). The incidences of poisoning by herbicides, fungicides, and mixed formulations all showed an increasing trend from 2008 through 2020, with an APC of 8.6% (95%CI: 5.8%-11.5%), 9.1% (95%CI: 0.3%-18.7%), and 193.3% (95%CI: 11.6%-671.0%), respectively; the incidence of poisoning by other types of pesticides showed a decreasing trend from 2008 to 2020, with an APC of −14.1% (95%CI: −23.7%-−3.2%). Conclusion The overall reported pesticide poisoning incidents in Jiaxing City present a decline then a rise in 2008 to 2020. Relevant departments should take timely measures to prevent and reduce the occurrence of pesticide poisoning according to the changing characteristics and occurrence trends of local pesticide poisonings.
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ObjectiveTo determine the epidemiological characteristics of a cluster of SARS-CoV-2 Omicron variant at a construction site and provide evidence for further COVID-19 prevention and control. MethodsDemographic data of all COVID-19 cases at a construction site in Qingpu District， Shanghai， and basic information of the construction site were retrospectively collected through filed investigation. Descriptive epidemiology was used for the analysis. Basic reproduction number （R0） and time-dependent reproduction number （Rt） were calculated using R program. ResultsDuring April 12 and May 8， 2022， a total of 314 cases were reported at the construction site， with an attack rate of 60.62%. The attack rate significantly differed between workers and managers （χ2=10.868， P<0.001）， whereas did not differ statistically by gender （χ2=0.358， P=0.550） or by vaccination status （χ2=2.861， P=0.091）. The age of all cases ranged from 5 months of age to 68 years， with a media age of 49.0 years （interquartile range： 39.8， 54.0）. In all cases， male was predominant （83.44%）. Moreover， the epidemic was mainly concentrated in the workers’ dormitory area， with infected cases identified in all buildings of each dormitory area. The attack rate ranged between 33.33% and 87.50% across the buildings. Symptoms and signs were observed among 43.0% of all cases， of which major clinical manifestations included cough （33.33%）， fever （30.37%） and headache （17.04%）. Clinical manifestations did not differ by gender （χ2=1.275， P=0.259） or by vaccination status （χ2=0.186， P=0.666）. Additionally， R0 was estimated to be 6.08 （95% confidence interval： 4.49‒8.02）. The Rt showed a decline in the beginning， followed by an increase and a re-decline. ConclusionThe cluster epidemic of COVID-19 caused by Omicron variant at the construction site is highly contagious， spreads rapidly and quietly， causes mild symptoms， which finally resulted in a large number of infected cases. It warrants rapid and strict containment when an epidemic occurs at construction sites.
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Objective To investigate the prevalence and influencing factors of Blastocystis hominis infection among children with diarrhea under five years of age in Guangzhou City. Methods Children with diarrhea under 5 years of age admitted to Guangzhou Children’s hospital, Guangzhou Maternity and Child Healthcare Hospital and Guangzhou Women and Children’s Medical Center during the period between January 1 and December 31, 2020, were enrolled. Participants’ demographics, living environments and health status were collected using questionnaire surveys. Stool samples were collected from participants and nucleic acid was extracted. B. hominis infection was identified using PCR assay and sequence alignment, and the factors affecting B. hominis infection among children with diarrhea under 5 years of age were identified using univariate analysis and multivariate logistic regression analysis. Results A total of 684 children with diarrhea under 5 years of age were enrolled, including 468 male children and 216 female children, with a mean age of (1.79 ± 1.12) years. The overall prevalence of B. hominis infection was 4.97% [34/684, 95% confidential interval (CI): (3.59%, 6.86%)] among participants, and there was no significant difference in the prevalence of B. hominis infection between children with chronic [7.52% (20/266), 95% CI: (4.92%, 11.33%)] and acute diarrhea [3.35% (14/418), 95% CI: (2.01%, 5.54%)] (χ2 = 5.983, P = 0.014). Multivariate logistic regression analysis identified keeping pet [odds ratio (OR) = 6.298, 95% CI: (2.711, 14.633)], drinking non-tap water [OR = 4.522, 95% CI: (1.769, 11.561)], lactose intolerance [OR = 4.221, 95% CI: (1.043, 17.087)], antibiotic use [OR = 0.125, 95% CI: (0.017, 0.944)] and chronic diarrhea [OR = 2.172, 95% CI: (1.018, 4.637)] as factors affecting B. hominis infection among children with diarrhea under 5 years of age in Guangzhou City. Conclusions B. hominis infections is detected in children with diarrhea under five years of age in Guangzhou City. Improving home environments and pet-keeping hygiene is recommended to reduce the likelihood of B. hominis infection among children.
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ObjectiveTo characterize the prevalence and epidemic situation of imported malaria cases in Songjiang District of Shanghai from 2013 to 2022， and to provide evidence for malaria prevention and control. MethodsRelated data were collected and analyzed， including malaria cases， blood testing of febrile patients， and mosquito surveillance in Songjiang from 2013 to 2022. ResultsA total of 13 002 febrile patients in Songjiang were tested for plasmodium parasites from 2013 to 2022， among which 18 malaria cases were confirmed， including 17 cases of falciparum malaria and 1 case of ovale malaria. Moreover， a total of 36 malaria cases were notified in Songjiang through the National Notifiable Disease Reporting System from 2013 to 2022， including cases reported from Songjiang District and other districts or provinces with physical addresses in Songjiang. Of them， there were 31 cases of falciparum malaria， 2 cases of vivax malaria， 2 cases of ovale malaria and 1 case of quartan malaria. The gender ratio of male to female cases was 17∶1， and the majority was young and middle aged. In addition， 35 cases were imported from Africa and 1 case from southeast Asia； 34 cases were migrant workers， and 2 cases were travellers abroad； 17 cases were found and reported in Songjiang， 15 cases were reported from other districts of Shanghai， and 4 cases were reported from other provinces； 27 cases were treated in Shanghai， 3 cases were treated in other provinces and 6 cases were treated with self-provided antimalarial drugs. Mosquito surveillance in Songjiang showed that density of Anopheles sinensis was extremely low. ConclusionNo indigenous malaria case has been notified in Songjiang since 2008. Malaria surveillance on migrant workers remains the focus of malaria prevention and control. Furthermore， achievement of malaria elimination in Songjiang should be continually enhanced to avoid potential further transmission of imported malaria.
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【Objective】 To analyze the epidemiological characteristics of pertussis in Shaanxi Province from 2012 to 2021. 【Methods】 We collected the information of pertussis cases in Shaanxi Province from 2012 to 2021 by the China Disease Control and Prevention Information System for analyzing the incidence and distribution characteristics. 【Results】 From 2012 to 2021, a total of 8270 cases of pertussis were reported in Shaanxi Province, with the incidence ranging from 0.21 to 6.20 per 100 000 persons, and for an annual average incidence of 2.17 per 100 000 persons. 44.81% (3 706/8 270) occurred from June to September. The annual average incidence in southern Shaanxi, Guanzhong, and northern Shaanxi was 1.78, 2.47, and 1.46 per 100 000 persons (χ2=289.638, P<0.001). The number of patients (proportions) with pertussis aged 0-1, 1-5, 5-10, and ≥10 years was 3 884 (46.96%), 2 869 (34.69%), 1 408 (17.03%), and 109 (1.32%), respectively. The number of patients (proportion) ≤ 2 months old, 3-5 months old, and ≥ 6 months old was 884 (22.76%),1 608 (41.40%), and 1 392 (35.84%) among pertussis patients under 1 year old. 【Conclusion】 The incidence of pertussis in Shaanxi Province basically showed an increasing trend with higher rates between June and September, higher rates in Guanzhong region of the province, and more patients over 5 years old.
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Objective To understand the clinical and epidemiological characteristics of human ocular thelaziasis patients in China. Methods Case reports regarding human ocular thelaziasis cases in China were retrieved in international and national electronic databases, including CNKI, VIP, CBM, Traditional Chinese Medical Literature Analysis and Retrieval System, Wanfang Database, PubMed and Web of Science from 2011 to 2022. Patients’ gender, age, clinical symptoms, treatment, recurrence, site of infections, time of onset, affected eye, affected sites, number of infected Thelazia callipaeda, sex of T. callipaeda and source of infections were extracted for descriptive analyses. Results A total of 85 eligible publications were included, covering 101 cases of human ocular thelaziasis, including 57 males (56.44%) and 44 females (43.56%) and aged from 3 months to 85 years. The main clinical manifestations included foreign body sensation (56 case-times, 22.49%), eye itching (38 case-times, 15.26%), abnormal or increased secretions (36 case-times, 14.46%), tears (28 case-times, 11.24%) and eye redness (28 case-times, 11.24%), and conjunctival congestion (50 case-times, 41.67%) was the most common clinical sign. The most common main treatment (99/101, 98.02%) was removal of parasites from eyes using ophthalmic forceps, followed by administration with ofloxacin and pranoprofen. In publications presenting thelaziasis recurrence, there were 90 cases without recurrence (97.83%) and 2 cases with recurrence (2.17%). Of all cases, 51.96% were reported in four provinces of Hubei, Shandong, Sichuan, Hebei and Henan, and ocular thelaziasis predominantly occurred in summer (42.19%) and autumn (42.19%). In addition, 56.45% (35/62) had a contact with dogs. Conclusions The human thelaziasis cases mainly occur in the continental monsoon and subtropical monsoon climate areas such as the Yellow River and the Yangtze River basin, and people of all ages and genders have the disease, with complex clinical symptoms and signs. Personal hygiene is required during the contact with dogs, cats and other animals, and individual protection is required during outdoor activities to prevent thelaziasis.
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Objective To determine the epidemiological characteristics of measles in Jinshan District of Shanghai in 2002‒2019. Methods This study was a secondary data analysis using measles surveillance system and epidemiological case reports in Jinshan District from January 2002 through December 2019. Temporal characteristics of the disease onset was determined by a concentration method. ArcGis 10.4 and SaTScan 9.6 software were used for spatiotemporal clustering scanning analysis. Results From 2002 through 2019， a total of 289 cases of measles were reported in Jinshan District， Shanghai， with an average annual incidence of 2.24 per 105. The annual incidence fluctuated from 0 to 11.27 per 105. The highest incidence was recorded in 2005 （11.27 per 105）， followed by a decline； however， there was a rebound in 2008 （5.26 per 105） and 2015 （3.30 per 105）. The concentration M was determined to be 0.62， showing a clear seasonality concentrated in February to May. The spatiotemporal scan found that spatial and temporal clusters were more likely to occur in the areas with higher population density such as Zhujing Town and Shihua Community and between 2002 and 2009. The majority of measles cases were infants and children under the age of 1 and adults aged 20‒39 years. Approximately 66.78% of measles cases reported unknown vaccination history. In addition， in children aged 8 month to 4 years， the vaccination rate of measles-containing vaccines in the domestic migrants was much lower than the local residents （χ2=4.44， P=0.035）. Conclusion The incidence of measles in Jinshan District presents a downward trend. The population affected has a "two-way displacement"， which is concentrated in the more populated areas. It is necessary to strengthen measles surveillance and implement supplementary immunization programs with measles-containing vaccines for at-risk populations.
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Objective:To analyze the epidemic characteristics and virus gene sequence of hemorrhagic fever with renal syndrome (HFRS) in an industrial park in Daishan County, Zhejiang Province, and to provide clues and basis for local HFRS prevention and control.Methods:According to the case questionnaire in the "National Surveillance Program for Hemorrhagic Fever with Renal Syndrome", general and epidemiological investigation of HFRS cases was carried out in the epidemic-related industrial park. Serum samples of the cases, people and host animals in the same living environment were collected for hantavirus antibody or nucleic acid detection, the M, S gene amplification and sequence determination. MEGAX 10.1.8 software was used to construct the phylogenetic tree of M and S genes for virus genotyping and evolutionary analysis.Results:A total of 3 confirmed cases of HFRS were reported. They were all workers in the epidemic-related industrial park, male, who lived in the park for more than half a year and had no history of HFRS vaccination. There were no rodent-proof facilities in the industrial park's dormitories and canteens, and the living items were placed in a disorderly manner, the rodents and its excrement could be seen; a total of 38 host animals were captured in the same living environment with cases, all of which were Rattus norvegicus. The 3 reported cases of HFRS were all mild, with atypical clinical manifestations in the early stage of onset, mainly fever and fatigue. The serum specific antibodies of hantavirus IgG and IgM were positive (3/3), and the antibodies of people in the same living environment were negative (100.0%, 100/100). The serum samples of 2 reported cases of HFRS and 4 Rattus norvegicus were positive for nucleic acid, all of which were SEOV type hantavirus. The M gene segment homology of 6 positive serum samples was 100.0%, which was closely related to Rod/2012/QHD/4/Gc isolated from Hebei and RuianRn180 isolated from Ruian Zhejiang Province; the homology of S gene segment was 99.6% to 99.8%, which was closely related to JiangxiXinjianRn-09-2011, a strain isolated from Jiangxi Province. Conclusions:The HFRS epidemic in the industrial park is caused by the transmission of SEOV type hantavirus to humans via Rattus norvegicus; poor living environment, poor hygiene habits of personnel and lack of vaccination are all related to the incidence of HFRS; the main epidemic strains shows high homology and geographical aggregation.
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Objective To analyze and compare the epidemiological characteristics of imported malaria in Jiaozuo City before and after malaria elimination, so as to provide insights into the malaria surveillance during the post-elimination stage and prevention of re-establishment of imported malaria. Methods Data pertaining to the epidemic situation and individual investigation of malaria in Jiaozuo City before (from 2010 to 2016) and after malaria elimination (from 2017 to November, 2020) were captured from the National Notifiable Disease Reporting System and the Information System for Parasitic Diseases Control and Prevention of Chinese Center for Disease Control and Prevention and were analyzed statistically. Results A total of 74 imported malaria cases were reported in Jiaozuo City from 2010 to 2021. Imported cases were predominantly Plasmodium falciparum malaria cases in Jiaozuo City before and after malaria elimination, and there was no significant difference in the proportion of malaria parasite species (χ2 = 0.234, P > 0.05). The imported malaria cases was predominantly reported in Wuzhi County, and was identified in overseas male farmers and businessmen at ages of 20 to 59 years, while the greatest number of imported malaria cases was reported in June and December before and after malaria elimination. The imported malaria cases predominantly acquired malaria parasite infections in sub-Saharan African countries; however, the proportion of imported malaria cases returning from Southeast Asian counties increased after malaria elimination than before malaria elimination (χ2 = 5.989, P < 0.05). The longest duration from onset to definitive diagnosis of malaria reduced from 27 days before malaria elimination to 18 days after malaria elimination, and the median duration reduced from 3 days to 2 days, while the proportion of definitive diagnosis of malaria increased from 60.47% before malaria elimination to 83.87% after malaria elimination (χ2 = 4.724, P < 0.05). In addition, the proportion of malaria cases definitively diagnosed and reported by medical institutions increased after malaria elimination than before malaria elimination (χ2 = 5.406, P < 0.05). Conclusions The imported malaria patients were predominantly P. falciparum malaria cases in Jiaozuo City during 2010 to 2021, and the patient’s medical care-seeking awareness and medical staff’s diagnosis and treatment ability have improved after malaria elimination. It is necessary to strengthen and improve malaria surveillance and response system and prevent the re-establishment of overseas imported malaria.
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Objective To analyze the epidemiological characteristics of automatic warning signals of infectious diseases received in Tianjin during the 13th Five-Year Plan period, and to provide reference for the function optimization of automatic warning system of infectious diseases during the 14th Five-year Plan period． Methods The data of infectious disease automatic early warning signals in Tianjin from 2016 to 2020 were downloaded from the China infectious diseases automated-alert and response system (CIDARS). The characteristics and response of early warning signals were analyzed by descriptive method. Results During the 13th Five-Year Plan period, 23,660 early warning signals were received in Tianjin, involving 39 kinds of infectious diseases, with 100% response rate and 1.10% positive rate of early warning signals. The median response time of warning signal was 0.53 hours (P25-P75: 0.19-1.17h). 95.74% of signals were responded within 2 hours and 98.47% of signals were responded within 24 hours. COVID-19, other infectious diarrhea diseases, dysentery, measles, and scarlet fever were the top five diseases with early warning signals. Conclusion During the 13th Five-Year, the automatic early warning system of infectious diseases in Tianjin runs well and has a high response rate, but the positive rate of early warning signal is low. During the 14th Five-Year，further research is needed to improve the early warning threshold according to the prevention and control needs and epidemic characteristics of different diseases, and to improve early warning positive rate.
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【Objective】 To assess the epidemiological characteristics and transmission risk of asymptomatic COVID-19 infection in Shaanxi Province. 【Methods】 A dense population database of COVID-19 cases in Shaanxi Province was constructed as of March 26, 2020, and 28 asymptomatic infected patients were selected through case epidemiological investigation report for descriptive analysis. 【Results】 In Shaanxi Province, the majority of asymptomatic COVID-19 infections were in the 20-59 years old group, and women took up a higher proportion than men. 82.14% of asymptomatic infections were found in the centralized isolation state. Nearly 80% of asymptomatic infections and confirmed cases were mainly exposed by living together in the family. The median number of days from last contact with the source of infection for all asymptomatic infected persons was 13, with 3 (10.71%) showing clinical symptoms. Epidemiological investigations showed that asymptomatic infections could spread as a result of shared family life. 【Conclusion】 At present, imported cases in Shaanxi Province continue to exist. Considering the concealed transmission of asymptomatic infections, prevention and control work is still facing challenges.
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Objective:To analyze the epidemiological and clinical characteristics of human brucellosis in Sichuan Province, and to provide a scientific basis for prevention and control of brucellosis.Methods:Retrospective analysis methods were used to collect the data of reported cases of brucellosis in Sichuan Province from 2018 to 2020 from the "Infectious Disease Reporting Information Management System" in the "China Disease Prevention and Control Information System". The distribution (population, time and region) and case investigation data (epidemiological contact history and clinical manifestations) were analyzed by descriptive epidemiological.Results:A total of 309 cases of brucellosis were reported in Sichuan Province in 2018 - 2020, and no deaths occurred. The annual incidence rate was 0.123/100 000. Among the 309 reported cases of brucellosis, the sex ratio of men to women was 2.4 ∶ 1.0 (218 ∶ 91); the age of onset was mainly 20 - 60 years old, accounting for 79.9% (247/309); the occupation was mainly farmers, accounting for 51.8% (160/309). Brucellosis cases were reported in every month of the year, mainly from March to August, accounting for 72.5% (224/309) of the total number of cases. Cases were reported in 21 cities (autonomous prefectures) in Sichuan Province from 2018 to 2020. The top 5 cities (autonomous prefectures) in terms of cumulative number of cases were Chengdu, Liangshan, Zigong, Neijiang and Luzhou in order, accounting for 60.5% (187/309) of the total number of cases. Among the 309 reported cases of brucellosis, 279 case investigations were completed. Among them, 258 cases had a history of contact with livestock and their products, accounting for 92.5%; all contacted livestock were sheep; the main mode of transmission was direct contact, accounting for 88.5% (247/279); the main routes of transmission were sheep farming (50.2%, 140/279), sheep slaughtering (18.6%, 52/279), selling mutton or cutting sheep products in mutton restaurants (11.1%, 31/279); the main clinical manifestations were fever, fatigue, hyperhidrosis, and muscle and joint pain, accounting for 91.4% (255/279), 89.2% (249/279), 80.3% (224/279) and 65.2% (182/279), respectively.Conclusions:The spread of brucellosis in Sichuan Province is increasing, and spring and summer are the epidemic seasons. Brucellosis cases are most common in sheep farms, and the infection method is mainly direct contact infection; the clinical manifestations are diverse and non-specific. Relevant departments should strengthen the prevention and control of the disease in key populations and regions to control the outbreak of brucellosis.
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Objective To investigate the epidemiological characteristics of current advanced schistosomiasis cases in China, so as to provide the scientific evidence for the precision management and medical care of advanced schistosomiasis. Methods The baseline data pertaining to the current advanced schistosomiasis cases in China were collected from the Epidemiological Dynamic Data Collection Platform (EDDC) operated by the Chinese Center for Disease Control and Prevention. The demographic characteristics, population and regional distribution and medical care of advanced schistosomiasis cases were analyzed with a descriptive method. Results A total of 31 889 cases with advanced schistosomiasis were reported in China by the end of June, 2019, and these cases were mainly identified in Hubei Province (7 737 cases) followed by in Jiangxi Province (7 256 cases), Hunan Province (5 615 cases), Anhui Province (5 236 cases) and Jiangsu Province (2 908 cases), accounting for 90.2% (28 752/31 889) of total cases in China. The current advanced schistosomiasis cases had a male/female ratio of 1.5∶1, and a mean age of (67.0 ± 11.2) years, with 92.6% (29 521/31 889) detected in individuals at ages of over 50 years. There were 97.6% (31 109/31 889) of the cases with an educational level of junior high school and lower, and 95.2% (30 359/31 889) with an occupation of farmers. Ascites (72.6%, 23 164/31 889) and splenomegaly types (26.3%, 8 386/31 889) were predominant in current advanced schistosomiasis cases in China, and there was a significant difference in the constituent ratio of disease types among current advanced schistosomiasis cases with different age groups (χ2 = 362.31, P < 0.01), with the ascites type as the predominant type of advanced schistosomiasis. Among the current advanced schistosomiasis cases, 88.9% (28 358/31 889) and 18.7% (5 973/31 889) had received medical treatment and surgical treatment, respectively. Conclusions The current advanced schistosomiasis cases are predominantly reported in five marshland and lake endemic provinces of China where schistosomiasis is not eliminated, and are mostly categorized as the ascites and megalosplenia types, with minor differences seen in gender and disease-type distributions. Precision medical care should be reinforced according to the epidemiological features of the current advanced schistosomiasis cases, and early screening and standard management and follow-up is required.
RESUMO
Objective:To evaluate the epidemiological trend of varicella（chickenpox）in Urumqi， this retrospective study was performed by using the school surveillance data between 2014 and 2018. Methods:Descriptive epidemiology method was used to analyze the data of varicella cases from school infectious disease prevention and control information management system from 2014 to 2018. Results:A total of 4 910 cases of varicella were reported in primary and secondary schools， with an average incidence of 290.73/100 000 per year. Primary school students accounted for 60.6%， middle school students for 27.4% and high school students for 12.0%. Among them， there were 2 595 boys and 2 315 girls with sex ratio of 1.12∶1. Two seasonal peaks of varicella incidence were observed every year， from March to June and from November to January of next year. Conclusion:Primary schools are the major places of varicella outbreak and should be the priority places for prevention and control， but the prevention and education in boarding schools should not be neglected. In areas with high incidence of varicella， it is vital to focus on prevention to avoid the infectious diseases spreading and outbreak.
RESUMO
Objective To analyze the epidemiological characteristics of imported cases with Plasmodium ovale infections in Jiangsu Province from 2012 to 2020, so as to provide insights into the development of the imported malaria control strategy in the province. Methods All data pertaining to cases with definitive diagnosis of P. ovale malaria in Jiangsu Province from 2012 to 2020 were captured from the National Notifiable Disease Report System and the Information Management System for Parasitic Disease Control in China, including the date of going abroad and returning to China, time of malaria infections overseas, date of malaria onset, initial diagnosis and definitive diagnosis. All data pertaining to epidemic status were descriptively analyzed. Results A total of 347 cases of P. ovale malaria were reported in Jiangsu Province from 2012 to 2020, with the highest number seen in 2015 (71 cases). All cases were laboratory-confirmed overseas imported malaria cases, accounting for 14.32% of all reported malaria cases in Jiangsu Province during the period from 2012 to 2020. The 5 cities with the highest number of imported P. ovale malaria cases included Lianyungang City (53 cases, 15.27%), Nantong City (44 cases, 12.68%), Huai’an (44 cases, 12.68%), Taizhou City (44 cases, 12.68%) and Yangzhou City (36 cases, 10.37%). The highest number of imported P. ovale malaria cases was reported in October (39 cases, 11.24%), and the lowest number was seen in December (21 cases, 6.05%). P. ovale infections mainly occurred in were Equatorial Guinea (97 cases, 37.95%), Angola (60 cases, 17.29%) and Nigeria (40 cases, 11.53%). The median duration between returning to China and malaria onset was 64 (144) days, and 7.49% (26/347) of all cases developed malaria one year after returning to China. The initial diagnosis of P. ovale malaria was mainly made at county-level medical institutions (117 cases, 33.72%), and the definitive diagnosis was mainly made at city-level medical institutions (122 cases, 35.16%). The correct rate of initial diagnosis of P. ovale malaria increased from 0 in 2012 to 78.26% in 2020, appearing a tendency towards a rise year by year (χ2 = 50.90, P < 0.01). Conclusions Imported P. ovale malaria cases were reported in Jiangsu Province each year from 2012 to 2020, and P. ovale infections predominantly occurred in Africa. Initial and definitive diagnoses of P. ovale malaria were mainly made at city- and county-level medical institutions. Training on the detection ability of malaria parasites is recommended among grassroots microscopists to improve the diagnostic ability of P. ovale malaria, and consolidate the achievements of malaria elimination in Jiangsu Province.