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Objective:To investigate the characteristics and change law of influenza in Fuling District of Chongqing in 2010-2019, and to provide a scientific basis for the pre-control of influenza.Methods:We performed an epidemiological analysis on the data of influenza-like illness reported by Fuling District influenza surveillance sentinel hospitals in Chongqing in 2010-2019.Results:In 2010-2019, a total of 42 169 cases of influenza-like illness were reported in Fuling District, with an average treatment rate of 1.22%. The activity of influenza-like illness peaked in winter, spring, and summer. There were 22 788 cases in the group of cases aged < 5 years, accounting for 50.4%. In 2010-2019, a total of 8049 pharyngeal swabs were collected to screen for influenza-like illness, with a positive rate of 14.52%. Influenza virus A H3 positive rate was highest, accounting for 37.98%, followed by influenza virus B BV positive rate, accounting for 30.80%. The highest influenza virus-positive rate was reported in January (26.34%), followed by November (24.85%).Conclusion:Influenza in the Fuling district of Chongqing mainly occurs in winter, spring, and summer. Influenza virus A H3 is the dominant strain. Children and school students are prone to develop influenza-like illnesses. We should continue to strengthen the monitoring of influenza strains, greatly promote vaccination, and strengthen the monitoring and prevention of influenza-like illness among susceptible populations.
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Objective:To understand the reported incidence level, change of the trend, epidemic characteristics and spatial clustering of scrub typhus in Nanjing, to explore key seasons, populations and areas for prevention and control, and to guide formulation of scientific and precise prevention and control strategies and measures.Methods:The reported data of scrub typhus in Nanjing from January 1, 2011 to December 31, 2020 were collected in the "Infectious Disease Surveillance System" from Chinese Center for Disease Control and Prevention. The reported incidence level and change of the trend were analyzed, and the seasonal, population and spatial distribution characteristics were described. Global spatial autocorrelation analysis was carried out by ArcGIS 10.3 software, and the spatial clustering scanning was carried out by using FleXScan 3.1.2 software.Results:A total of 192 cases of scrub typhus were reported in Nanjing from 2011 to 2020. Median annual reported incidence was 0.21/100 000 (0.12/100 000 - 0.49/100 000). Totally 87.5% (168/192) of cases were reported from October to November, and the peak occurred in November (57.8%, 111/192). Among these cases, males accounted for 64.1% (123/192); and the median age was 59 years old (6 - 84 years old). The groups ≥60 years old and 45 - 59 years old accounted for 47.9% (92/192) and 31.2% (60/192), respectively, which accounted for 79.2% (152/192) in all groups. Farmers accounted for 43.8% (84/192), household chores and unemployed people accounted for 16.7% (32/192), retired persons accounted for 15.6% (30/192) and workers accounted for 6.8% (13/192), which accounted for 82.8% (159/192) in all occupations. The top four areas in the total number of reported cases were Jiangning District (23.4%, 45/192), Luhe District (22.9%, 44/192), Gulou District (10.4%, 20/192) and Jiangbei New Area (8.9%, 17/192), which accounted for 65.6% (126/192) in all districts. According to global spatial autocorrelation analysis, Moran's I = 0.34 ( Z = 5.90, P < 0.001). FlexScan 3.1.2 software scanned and detected two spatial clusters areas, the first-class of cluster area covered three streets in Jiangning District, one street in Yuhuatai District and two streets in Pukou District [restricted log likelihood ratio ( RLLR) = 26.91, P < 0.001]. The second-class of cluster area included six townships/streets in Luhe District and four streets in Jiangbei New Area ( RLLR = 26.48, P < 0.001). All the cluster areas were agriculture-related. Conclusions:The reported incidence level of scrub typhus in Nanjing is low and stable which belongs to a typical autumn epidemic area. The middle-aged and elderly population is the key population and the agriculture-related area is key area. It is suggested that scrub typhus should be included in the management of statutory or regional key infectious diseases in Nanjing. Additionally, training on diagnosis and treatment technology and information report management of scrub typhus need to be carried out, and comprehensive prevention and control interventions such as health education, personal protection, rodent prevention and control and vector control should be strengthened and implemented in the high incidence season.
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【Objective】 To assess the trend of hepatitis B virus (HBV) prevalence and associated risk factors among voluntary blood donors in Guangzhou area from 2011 to 2020, and to explore the impact of hepatitis B vaccination in neonates on the risk of HBV infection. 【Methods】 Blood samples of 2 624 434 voluntary blood donors from 2011 to 2020 in Guangzhou were tested by HBV surface antigen (HBsAg) enzyme-linked immunosorbent assay (ELISA) reagents twice and nucleic acid test (NAT) reagent once. Samples reactive to ELISA twice, or ELISA once + NAT were considered as HBV infection. The gender, age, ethnicity and region of HBV infected blood donors were collected, and the incidence of HBV infection in blood donors born before and after 1992 (when HBV vaccination was conducted in neonates) was compared. The trend and risk factors of HBV infection in blood donors in Guangzhou from 2011 to 2020 were analyzed. 【Results】 An overall HBV prevalence of 0.75% was found in voluntary blood donors in Guangzhou area from 2010 to 2020, showing an overall downward trend(P0.05), but both were significantly higher than that in Hong Kong, Macao, Taiwan and foreign countries (P<0.05). HBV prevalence in Han nationality donors was significantly higher than the ethnic minority donors (P<0.05). Gender, age, ethnicity and birth vaccination are the main risk factors for HBV infection among blood donors. 【Conclusion】 The overall HBV prevalence among voluntary blood donors in Guangzhou area from 2011 to 2020 has shown a decreasing trend, and differences have been found in gender, age, region, ethnicity and birth vaccination, which is helpful to formulate targeted recruitment strategies, thus reducing the risk of transfusion transmitted HBV.
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Introducción: La Habana fue el territorio más complejo a nivel nacional en el enfrentamiento al primer brote de la COVID-19. Su condición de capital, la densidad poblacional, la escasa delimitación geográfica entre sus municipios, el elevado flujo intermunicipal e interprovincial de personas, sumado a que es la provincia que mayor número de viajeros recibe procedentes del extranjero, confirieron a este territorio particularidades en el enfrentamiento a la pandemia. Objetivo: Determinar las principales características clínico-epidemiológicas de pacientes cubanos residentes en La Habana afectados por la COVID-19. Métodos: Se realizó un estudio observacional, analítico, de corte transversal. La muestra quedó formada por 431 pacientes, mayores de un año, de alta epidemiológica de la infección por SARS-CoV-2. Para la recolección de información se aplicó un cuestionario a través de una entrevista. Resultados: La edad promedio de la muestra fue de 45 años. Más de la mitad de los casos evolucionaron de modo sintomático (no grave o grave). La fiebre fue la manifestación clínica más frecuente. Los individuos incluidos en la muestra, con grupo sanguíneo O, o con antecedentes de asma, mostraron menos riesgo de presentar formas sintomáticas de la enfermedad. Conclusiones: Los resultados sugieren que la edad constituye el principal factor de riesgo para desarrollar formas sintomáticas (no graves o graves) de la COVID-19. De modo contrario, el grupo sanguíneo O y el antecedente de asma son factores de protección para estas formas de evolución clínica(AU)
Introduction: Havana city was the most complex territory at the national level facingthe first outbreak of COVID-19. Its condition of capital, the population density, the limited geographical delimitation between its municipalities, the high inter-municipal and inter-provincial flow of people, added to the fact that it is the province that receives the largest number of travelers from abroad, conferred particularities on this territory. Objective: To determine the main clinical-epidemiological characteristics of patients affected by COVID-19 living in Havana. Methods: An observational, analytical, cross-sectional study was carried out. The sample contained 431 patients, older than one year, with epidemiological discharge from the SARS-CoV-2 infection. To collect information, a questionnaire was applied through an interview. Results: The average age of the sample was 45 years. More than half of the cases evolved in a symptomatic way (not serious or serious). Fever was the most frequent clinical manifestation. The individuals included in the sample, with blood group O or with a background of asthma, showed less risk of presenting symptomatic forms of the disease. Conclusions: The results suggest that age is the main risk factor for developing symptomatic forms (not severe or severe) of COVID-19. On the contrary, blood group O and a history of asthma are protective factors for these forms of clinical evolution(AU)
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Humans , Male , Female , Blood Group Antigens , Adaptation, Psychological , Population Density , Protective Factors , COVID-19 , Clinical Evolution , Cross-Sectional Studies , Risk Factors , Clinical Laboratory TechniquesABSTRACT
Objective The influenza monitoring results in Huzhou city were analyzed to understand the characteristics of influenza pandemic and to provide a scientific basis for prevention and control of influenza. Methods The influenza-like cases(ILI)were collected from two sentinel hospitals in Huzhou according to the protocol of The National Influenza Surveillance Program. Pharynx swab samples of the ILI were taken randomly for the test of influenza virus. Results Among 5 322 788 patients who went to the sentinel hospitals in Huzhou from 2011 to 2017, 185 010 were ILI. The percentage of ILI was 3.48% and there was a slowly rising trend in ILI% of month from 2011 to 2017(trend χ2 = 2 970.93, P < 0.001). Winter /spring and summer seasons marked the peaks in influenza epidemics. Patients were mostly children under 14 years old(accounting for 89.1%). In a total of 11 490 throat swabs collected from ILI, 1 975 were tested to be positive for influenza virus(positive rate 17.19%). These included A type H3N2, 1 008; A type H1N1, 350; B type, 614(160 Victoria type, 238 Yamagata, 216 unclarified B type), and 3 mixed type. The correlation between positive rate of influenza nucleic acid test and ILI% is statistically significant(r = 0.40, P < 0.001). Conclusion The incidence peaks of influenza in Huzhou are mainly in the winter /spring and summer periods. The influenza is mainly occurs in young people under 14 years old and the main type virus is A(H3N2). The prevalence of influenza B and H1N1 occurs at intervals. There is a positive correlation between influenza activity and ILI%.
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OBJECTIVES@#To analyze the regional epidemic features of coronavirus disease 2019 (COVID-19) in Henan Province, China.@*METHODS@#According to the data of COVID-19 patients and the resident population at the end of 2018 in Henan Province, statistical description and analysis of epidemiological characteristics of COVID-19 in Henan Province were conducted, including the time distribution, population distribution, and regional distribution.@*RESULTS@#The cumulative incidence of COVID-19 in Henan Province was 1.32/100 000, the cure rate was 98.03%, and the fatality rate was 1.73% by March 9, 2020. The incidence curve showed that the epidemic peak reached from January 24 to January 28. The high-incidence area was Xinyang, with a standardized cumulative incidence rate of 4.36/100 000. There were 580 female COVID-19 patients (45.60%), 688 males (54.09%) in Henan Province. The incidence of males was 1.41/100 000, while the incidence of females was 1.23/100 000. The age with the highest incidence of COVID-19 in Henan Province was 20-69 years old (88.68%). The incidence rate was highest in men aged 30-39 (2.51/ 100 000), while the lowest rate in women aged 0-9 (0.16/100 000). There were 1 225 local patients (96.31%), and the rural patients (45.73%) were slightly higher than the urban patients (44.02%) in Henan Province. A total of 63.60% patients had traveled or lived in Hubei or contacted with people who came from Hubei to Henan. The proportion of patients whose family members suffered from COVID-19 was 32.70%. Global spatial autocorrelation analysis suggested that there was a statistically significant positive correlation in the spatial distribution of COVID-19 patients in Henan Province (Moran's =0.248, =2.955, <0.01).@*CONCLUSIONS@#There are differences in the morbidity and mortality of COVID-19 patients in different areas of Henan Province, with epidemic peak reaching from January 24 to January 28. Henan is dominated by local patients, male patients, and patients with contact history in Hubei. The space appears to be moderately clustered.
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Adult , Aged , Child , Child, Preschool , Female , Humans , Infant , Infant, Newborn , Male , Middle Aged , Young Adult , Betacoronavirus , China , Epidemiology , Coronavirus Infections , Epidemiology , Incidence , Pandemics , Pneumonia, Viral , Epidemiology , Spatial AnalysisABSTRACT
Objective To analyze epidemiological characteristics of brucellosis in Xinjiang Production and Construction Corps and to provide evidences for control and prevention of the disease.Methods Retrospective study method was used to collect the epidemic characteristics of cases and serological surveillance of brucellosis data in Xinjiang Production and Construction Corps from 2013 to 2017,the time,region,population distribution characteristics and laboratory test results of the disease were analyzed.Results In 2013-2017,the Xinjiang Production and Construction Corps reported a total of 3 287 cases of brucellosis,with an average annual incidence of 24.02/100 000,and no death case was reported.During the period,the incidence was 21.11/100 000,29.73/100 000,26.68/100 000,20.10/100 000 and 19.23/100 000,which showed a decline trend in general (linear x2 =23.67,P ＜ 0.01).The largest cumulative numbers of reported cases of the Corps were in five divisions,they were the Eighth Division with 599 cases,the Sixth Division with 470 cases,the Fourth Division with 366 cases,the Tenth Division with 320 cases and the Ninth Division with 313 cases,and they accounted for 62.91％ (2 068/3 287) of the total number of cases in the whole Corps.Brucellosis occurred in each month of the year,the number of cases reported from March to August accounted for 72.59％ (2 386/3 287),the peak incidence occurred in May and June,showing obvious seasonal fluctuation.Of all reported cases,74.78％ (2 458/3 287) were men,and 25.22％ (829/3 287) were women,38.97％ (1 281/3 287) were at the ages of 40-49 years,farmer was the highest occupation which accounted for 47.52％ (1 562/3 287).Totally 24 120 blood samples were collected from high-risk occupation during the period and 457 samples were positive for Brucella antibody,with an average positive rate of 1.89％,of the positive cases,52.30％ (239/457) had symptoms of brucellosis.Conclusions On the whole,the epidemic of brucellosis in Xinjiang Production and Construction Corps is declining year by year.But as the epidemic slowly expands,all departments should strengthen joint prevention and control measures,control and eliminate the source of infection.At the same time,we should strengthen the propaganda,education and behavior intervention for high-risk occupational groups.
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Objective@#To understand the characteristics of sleep disorder in HIV positive and negative individuals, and compare the distributions and epidemiologic characteristic of different subtypes of sleep disorder between two groups.@*Methods@#Baseline data were from the prospective cohort study of comparative HIV and aging research in Taizhou of Zhejiang province from January to December, 2017. A total of 459 HIV positive patients and 798 HIV negative controls with sleep disorders (Pittsburg Sleep Quality Index >5 or at least one question with answers of "most nights" or "every night" for Jenkins Sleep Scale) were included in the analysis. Cluster analysis was conducted to identify the different subtypes of sleep disorder based on 15 sleep-related questions.@*Results@#A total of 1 257 participants were divided into three groups (clusters), i.e. difficulty falling asleep and sleep keeping group (cluster 1), the mild symptoms group (cluster 2), and restless night and daytime dysfunction group (cluster 3), accounting for 19.4% (89/459), 63.8% (293/459) and 16.8% (77/459) in HIV positive group and 13.8% (110/798), 60.5% (483/798) and 25.7% (205/798) in HIV negative group (χ2=16.62, P<0.001). In HIV positive group, the patients in cluster 1 and 3 were older and had higher frailty score, the patients in cluster 1 had highest level of depression, and the more patients in cluster 3 had low body weight or overweight (χ2=13.29, P=0.039; χ2=23.33, P<0.001; χ2=25.71, P<0.001; χ2=15.37, P=0.004). In HIV-negative group, similar findings were found for age, depressive symptoms and frailty score. In addition, the proportion of those who were illiteracy or with primary school education level was significantly high in cluster 1, and the proportion of abnormal waist-to-hip ratio was significantly higher in cluster 1 and 3 (χ2=30.59, P<0.001; χ2=11.61, P=0.003).@*Conclusions@#The proportion of every subtype of sleep disorder in HIV positive individuals were different to those in HIV negative individuals. Mental and physical health status were the main factors affecting the prevalence of sleep disorder. It is necessary to conduct targeted interventions to improve sleep quality.
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Objective@#To provide scientific evidence for the prevention and control of the hand, foot and mouth disease (HFMD), we analyzed the epidemiological characteristics and pathogen surveillance of HFMD cases which were reported in Liaoning Province from 2008 to 2017.@*Methods@#The information of cases and laboratory monitoring were collected from the HFMD reports of 2008-2017. The epidemic intensity, three distribution and pathogen composition of HFMD were analyzed by using descriptive epidemiological method .@*Results@#There were 290 339 cases reported during 2008 to 2017 and the average incidence was 66.56/100000. The peak incidence was found for June to August, The incidence of crowd was mainly in the 0-6 years old children, and the male / female incidence ratio was 1.50∶1. Among 16 498 laboratory diagnosis cases, EV-A71 positive cases were 4 974 (30.15%), CV-A16 positive cases were 5 130(31.10%), and the other enteroviruses positive cases were 6 394 (38.76%).@*Conclusions@#The overall situation of HFMD in Liaoning province showed a fluctuating downward trend from 2008 to 2017. The epidemic had obvious seasonality and population, and the pathogenic characteristics were constantly changing, Monitoring should be strengthened.
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Objective@#To evaluate the epidemiologic characteristics of hand, foot and mouth disease in Zhejiang province between 2009 and 2017, so that scientific evidence could be provided for prevention and control of hand, foot and mouth disease.@*Methods@#Spatial, temporal and population distribution of HFMD was analyzed. Real-time reverse transcription polymerase cain reaction was used to test Enterovirus A71 and Coxsackievirus A16 in samples.@*Results@#Between 2009 and 2017, 1 108 093 HFMD cases were reported in Zhejiang with the prevalence of 226.24/100000; 2010, 2012, 2014 and 2016 had a higher prevalence than other years. Prevalence of HFMD peaked in April-July and September-October. Wenzhou, Taizhou and Ningbo had a higher prevalence than other cities. In total, 69.27% cases were children who were not enrolled in nursery school, and 65.67% were 1-3 years old. Pathogen surveillance showed that EV-A71 decreased in mild cases, whereas other enterovirus increased. However EV-A71 was still predominant in severe and fatal cases (56.0%).@*Conclusions@#Temporal and spatial distribution of HFMD is characteristic in Zhejiang province. EV-A71 predominated in severe cases and fatal cases, while other enterovirus (non-EV-A71, non CV-A16) were the main pathogen for mild cases.
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Objective@#To understand the epidemiologic characteristics of fall in the elderly in Shanghai, as well as the differences between urban and rural areas, and provide evidence for targeted fall prevention and intervention.@*Methods@#From January to March in 2017, a questionnaire survey was conducted in the elderly aged 60 or above selected from 7 urban communities and 6 rural communities in Shanghai to understand the epidemiologic characteristics of fall in the elderly and analyze the gender and urban-rural differences.@*Results@#In urban area, a total of 3 386 elderly people were surveyed, in whom 441 (13.0%) had fall and 261 (7.7%) were injured after fall. In rural area, a total of 2 826 elderly people were surveyed, in whom 320 (11.3%) had fall and 169 (6.0%) were injured after fall. Fall risk in women were higher than that in men in both urban and rural areas with OR of 1.62 (95%CI: 1.42-1.86) and 1.16 (95%CI: 1.38-1.98) respectively, but the differences of fall related injury were not significant. Compared with urban areas, fall risk and fall related injury risk were both lower in rural areas with OR of 0.86 (95%CI: 0.73-0.99) and 0.74 (95%CI: 0.56-0.99). Compared with urban areas, men had lower risk for fall, and women had lower risk for fall related injury with OR of 0.68 (95%CI: 0.51-0.90) and 0.66 (95%CI: 0.47-0.93) respectively. Fall mainly occurred at home. Fall in urban area more frequently occurred on stairs, and fall in rural area more frequently occurred during farming. More than 60% of the falls had environmental risk factors. Slippery ground and uneven ground were main reasons. The incidence of fracture resulted from fall was high indicated by 89 fracture cases in urban areas (28.2%) and 64 fracture cases in rural areas (36.1%).@*Conclusions@#The risk for fall in Shanghai had gender and urban-rural differences. Targeted intervention should be conducted according to the characteristics of fall in the elderly.
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Objective To analyze the epidemiological and pathogenic characteristics of hand-foot-mouth disease (HFMD) in Hebei Province from 2008 to 2017, so as to provide scientific evidence for prevention and control of HFMD. Methods The epidemic data and laboratory detection data of HFMD from 2008 to 2017 were collected and analyzed by descriptive epidemiology. Results From 2008 to 2017,a total of 690 368 cases of hand, foot and mouth disease, including 4 939 severe cases and 208 deaths were reported in Hebei Province, with an average annual incidence of 95.53/100 000. The largest number of reported light cases were 2009, while severe cases and deaths were in 2010. The number of reported cases increased every other year but decreased in general. In 2008, 2009 and 2012, the main peak of the onset of spring and summer was formed from April to June. In 2010, 2011 and 2013-2017, the main peak of the onset of spring and summer was from May to July. Main peak value in spring and summer showed a backward delayed trend. The sex ratio between men and women was 1.59:1.The majority of deaths case were scattered children and preschool case. Other enteroviruses, human enterovirus 71,(EV-A71) and coxasckievirus A16,(CV-A16) alternately became the main pathogens of common cases. The pathogenic composition of different cases was different and the difference was statistically significant ( 2=2274.17, P<0.001). Conclusion The number of reported deaths and severe cases has decreased significantly. It is necessary to adjust the focus of prevention and control, pay more attention to the mild cases of FHMD, and further strengthen the monitoring of other enteroviruses pathogenic spectrum.
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Objective To analyze the clinical characteristics in children with pertussis,and to provide a scientific basis for treatment of pertussis.Methods Retrospective analysis of general data,symptoms,signs,auxiliary examinations,treatment and prognosis was performed on the patients with pediatric pertussis in Xi'an from January 2015 to December 2016;the epidemiological data were analyzed by using descriptive approach.Results In a total of 857 patients with pertussis,there were 469 males and 388 females (the gender ratio of 1.21 ∶ 1.00),183 cases (21.3％) from the urban areas and 674 cases (78.7％) from the rural areas.The cases were reported throughout the year,indicating 2 peak times of onset:355 cases (41.5％) from July to September and 218 cases (25.4％) from February to April.And 473 cases (55.2％) were younger than 6 months;479 cases (55.9％) were inoculated with diphtheria,tetanus and pertussis combined vaccine(DTP) vaccine;492 cases (57.4％) were exposed to their family members who coughed at that time.Cough was the main symptom,and the median duration of pertussis from onset to diagnosis was 20 days.Concomitant symptoms included spasmodic cough was relieved in 836 cases (97.5 ％),facial suffusion in 806 cases (94.0％),peri-oral cyanosis in 308 cases (35.9％),asthma in 269 cases (31.4％),crow-like echo in 248 cases (28.9％),and apnea in 46 cases (5.4％);pulmonary moist rale was found by check-up in 761 cases (88.8％),and fever was observed in 159 cases (18.5％).The increased proportion of the peripheral blood lymphocytes was found in 702 cases (81.9％),the increased total count of leukocytes in 505 cases (58.9％),the increased procalcitonin(PCT) in 36 cases (4.2％) and the elevated level of high sensitivity C reactive protein(hsCRP) in 17 cases (2.0％);pneumonia was suggested by chest radiography in 673 cases (78.5％);in the blood-gas analysis,hypoxemia was suggested in 50 cases (5.8％) and respiratory failure in 9 cases (1.1％).In the 857 patients with pertussis,59 cases (6.9％) were with severe-type pertussis.At 1 week of the treatment,no spasmodic cough was reported in 515 cases (60.1％) and obviously relieved spasmodic cough in 198 cases (23.1％),and no deaths occurred.Conclusions The cases of pertussis occur throughout the year in Xi'an,predominately from July to September and February to April.A higher incidence is reported in the rural areas,compared with the urban areas,particularly in those younger than 6 months with incomplete DTP vaccination,who usually have severe conditions.In many cases,those with pediatric pertussis are infected by family members;most of them have spasmodic cough with good prognosis,without typical clinical signs.
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Objective To analyze the epidemiologic features and laboratory findings of acute and chronic brucellosis.Methods Two hundred and ninety-two patients with brucellosis admitted in Heilongjiang Agricultural Reclamation Bureau General Hospital during June 2015 to February 2017 were retrospectively reviewed,including 170 acute cases and 122 chronic cases;95 healthy subjects undergoing health check-up at the same period were randomly selected as control group.Epidemiological characteristics,clinical symptoms and findings of laboratory tests of acute and chronic brucellosis were analyzed with SPSS 18.0 software.Results The male to female ratio were 3.15 to 1 and 3.21 to 1 for acute and chronic brucellosis,respectively.The patients were mainly rural residents (74.12％ and 77.05％) and the majority of them were farmers (62.94％ and 66.39％).The onset time was mainly from March to June of the year (47.06％ and 46.72％).The proportion of acute brucellosis patients ≤ 14 years was higher than that of chronic brucellosis group (x2 =5.022,P ＜ 0.05);the proportion of acute brucellosis patients ＞ 64 years old was lower than that of chronic brucellosis group (x2 =3.900,P ＜ 0.05).The symptom of sweating and myosalgia in acute brucellosis was more frequent than that in chronic brucellosis (x2 =10.764 and 10.479,both P ＜ 0.01);while the symptom of weakness in chronic brucellosis was higher than that in acute brucellosis (x2 =5.347,P ＜ 0.05).The AST,ALT,γ-GT,ALP,LDH and HBDH levels in patients with acute and chronic brucellosis were significantly higher than those in the control group (t =3.602 and 5.205;2.529 and 2.682;2.669 and 1.941;5.169 and 7.068;3.601 and 2.240;3.469 and 3.954;P ＜ 0.05 or 0.01);while TP and ALB levels were reduced (t =-5.880 and-8.923;-8.106 and-8.774;all P ＜ 0.01).The CRP in the acute brucellosis group was significantly higher than that in the chronic brucellosis group (t =6.717,P ＜0.01).The therapeutic regimes for acute brucellosis and chronic brucellosis were same,the symptoms dissolved after successful treatment.Conclusion There are different clinical manifestations between acute and chronic brucellosis.Medication for brucellosis should be cautious and the changes of myocardial enzymes should be monitored.
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Objective To understand the epidemiological characteristics of influenza outbreaks in China from 2005 to 2013. Methods The data of influenza-like illness outbreaks involving 10 or more cases were collected through Public Health Emergency Management Information System and National Influenza Surveillance Information System in China,and the influenza outbreaks were identified according to the laboratory detection results. Descriptive epidemiological analysis was conducted to understand the type/subtype of influenza virus and outbreak time,area,place and extent. Results From 2005 to 2013,a total of 3 252 influenza-like illness outbreaks were reported in the mainland of China,in which 2 915 influenza outbreaks were laboratory confirmed,and influenza A(H1N1) pdm09 virus and influenza B virus were predominant. More influenza outbreaks were reported in the influenza A(H1N1)pandemic during 2009-2010. Influenza outbreaks mainly occurred during winter-spring,and less influenza outbreaks occurred in winter and summer vocations of schools. More influenza outbreaks were reported in southern provinces,accounting for 79% of the total. Influenza outbreaks mainly occurred in primary and middle schools,where 2 763 outbreaks were reported,accounting for 85% of the total. Averagely 30-99 people were involved in an outbreak. Conclusion A large number of influenza outbreaks occur during influenza season every year in China,the predominant virus type or subtype varies with season. Primary and middle schools are mainly affected by influenza outbreaks.
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Objective To understand the epidemiological characteristics of influenza outbreaks in China from 2005 to 2013. Methods The data of influenza-like illness outbreaks involving 10 or more cases were collected through Public Health Emergency Management Information System and National Influenza Surveillance Information System in China,and the influenza outbreaks were identified according to the laboratory detection results. Descriptive epidemiological analysis was conducted to understand the type/subtype of influenza virus and outbreak time,area,place and extent. Results From 2005 to 2013,a total of 3 252 influenza-like illness outbreaks were reported in the mainland of China,in which 2 915 influenza outbreaks were laboratory confirmed,and influenza A(H1N1) pdm09 virus and influenza B virus were predominant. More influenza outbreaks were reported in the influenza A(H1N1)pandemic during 2009-2010. Influenza outbreaks mainly occurred during winter-spring,and less influenza outbreaks occurred in winter and summer vocations of schools. More influenza outbreaks were reported in southern provinces,accounting for 79% of the total. Influenza outbreaks mainly occurred in primary and middle schools,where 2 763 outbreaks were reported,accounting for 85% of the total. Averagely 30-99 people were involved in an outbreak. Conclusion A large number of influenza outbreaks occur during influenza season every year in China,the predominant virus type or subtype varies with season. Primary and middle schools are mainly affected by influenza outbreaks.
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OBJECTIVES: This study investigated changes in hepatitis B seroprevalence from 1998 to 2013, and to identify differences in epidemiologic characteristics between hepatitis B surface antigen (HBsAg)-positive and HBsAg-negative people. METHODS: HBsAg seropositive rates were compared by year, sex, and age using the blood test data from the periods I to VI (1998-2013) of the Korea National Health and Nutrition Examination Survey. Interviews and self-administered surveys were conducted to collect data on health behavior, quality of life, comorbidities, and health care utilization. RESULTS: HBsAg seropositive rates in the Republic of Korea decreased from 4.6% in 1998 to 2.9% in 2008, and then remained the same for the next five years. While seropositive rates by age were the highest at 35 to 39 years of age in 1998, it peaked at 50 to 54 years of age in 2013. HBsAg-positive people showed high values from two liver function tests, including glutamic-oxaloacetic transaminase and glutamic-pyruvic transaminase, and the prevalence rates of liver cirrhosis and liver cancer were also significantly high. Indices for health behavior and quality of life showed no significant differences between HBsAg-positive and HBsAg-negative people. CONCLUSIONS: While HBsAg seropositive rates tended to decline after 1998, there have been no significant changes over the most recent five years. We should focus on treatment of existing hepatitis B patients along with immunization programmes to prevent new hepatitis B infections. In addition, it may be necessary to encourage HBsAg-positive people to follow healthier life-styles in order to prevent further progression of hepatitis B to liver cirrhosis and liver cancer.
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Humans , Alanine Transaminase , Aspartate Aminotransferases , Comorbidity , Delivery of Health Care , Health Behavior , Hematologic Tests , Hepatitis B Surface Antigens , Hepatitis B , Hepatitis , Immunization , Korea , Liver Cirrhosis , Liver Function Tests , Liver Neoplasms , Nutrition Surveys , Prevalence , Quality of Life , Republic of Korea , Seroepidemiologic StudiesABSTRACT
Objective The aim of this study was to systemically analyze the epidemiologic,serological and genetic characteristics of hepatitis E virus (HEV) in Shanghai from 1997 to 2012.Methods We analyzed the data related to the epidemics of hepatitis E from China Information System for Disease Control and Prevention.We implemented serological surveillance program,based on community healthy population with enzyme-linked immunosorbent assay method and estimated the standardized sero-prevalence.We also obtained nucleotide sequences of hepatitis E patients using the nested RT-PCT assays,together with propotype sequences in the GenBank to construct a HEV genetic database in Shanghai.Results In this paper,we found that the distribution of hepatitis E patients was sporadic in the past 16 years in Shanghai.The morbidity kept declining,but with seasonal and periodical fluctuation.Morbidity in males was significantly higher than in females,with the hard hit population between 30 and 65 year-olds.In total,3979 sera samples were collected through the serological surveillance programs in 2001,2004,2007 and 2012.The standardized sero-prevalence rates of the said years were 22.32％,18.56％,10.22％ and 34.43％ which all showing strong relationship with age groups and the regions where the populations were being monitored.73 nucleotide sequences of hepatitis E patients from hospitals were identified,during 2004 and 2008.Results from phylogenetic analysis revealed that all HEV isolates belonged to genotype Ⅳ and including 4 known subtypes 4a,4d,4h and 4i which sharing 83.09％-97.96％,85.87％-97.26％ and 83.80％-95.10％ nucleotide sequence identities with the swine HEV genotype Ⅳ of GU188851,DQ450072 and EF570133.Meanwhile,59 HEV isolates from different districts shared 99％ nucleotide sequence identities with each other.Conclusion Hepatitis E would still be a challenge for long time and the zoonotic questions that related to hepatitis E,need to be explored and explained in the future.
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Objective To explore the distribution of prevalence rates of typhoid and paratyphoid,with drug resistance and molecular types ofSalmonella(S.) typhi and S.paratyphi in Jiangsu province.Methods Data,collected by the national infectious disease reporting system in Jiangsu province from 2007 to 2011,was analyzed.K-B method was used to test the sensibility to 9 kinds of antibiotics among 210 stains of S.typhi and S.paratyphi.81 strains of S.typhi were classified by pulse-field gel electrophoresis (PFGE).Results The annual average incidence of typhoid and paratyphoid was 0.47 per 100 000 in the last five years,showing a decreasing trend.Highest incidence (1.70 per 100 000)was seen in the ＜ 1 year age group,with S.typhi and S.paratyphi A accounted for 66.19％ and 23.81％ among the 210 stains.The rate of drug resistance to nalidixic acid appeared to be the highest as 66.19％.The drug resistant rates to 6 kinds of antibiotics were on average,lower than 10.00％.The multi-drug resistant rate of S.typhi and S.paratyphi was 30.00％.In the last 3 years,37 types from 81 S.typhi strains had been classified into 4 clusters by PFGE.The predominant type was JPPX01.JS0027,accounted for 11.11％.JPPX01.JS0001 type had a specific regional distribution,but JPPX01.JS0014,JPPX01.JS0018 and JPPX01.JS0024 strains were widely spread.Results from the clustering analysis showed that cases in the 3 events tended to have a clustering nature.Conclusion The morbidity of typhoid and paratyphoid was in a relatively low level in Jiangsu province.Although S.typhi and S.paratyphi were sensitive to most of the commonly used antibiotics,the resistance rates to some kinds of antibiotics were increasing.The distribution of typhoid was sporadic in Jiangsu and without the dominant strain,it was unlikely that typhoid could become epidemic in the future,in Jiangsu.
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Objective To study the epidemiological characteristics on the clustering nature of pandemic (H1N1) 2009 in China.Methods Time and place distribution of pandemic (H1N1) 2009on the nature of clustering through data from Public Health Emergency Management Information System were described.Results As of August 10,2010,2773 pandemic (H1N1) 2009 clusters,a total of 77363 cases (including 20 deaths) were reported in the mainland of China.The most reported number of clusters was from schools and kindergartens with the total number of 2498 (accounted for 90.08％ of the total number).Middle schools appeared the have the most clusters (1223,accounting for 48.96％ ).The number of clusters reported in the southern provinces (cities) accounted for 77.03％ of the total,and was more than that in the northern provinces (cities).Two reported peaks in the southern provinces (cities) were in June and November,2009,respectively.There was only one reported peakin the northern provinces in September,2009.Conclusion Time and place distribution characteristics on the clusters of pandemic (H1N1) 2009 were similar to the seasonal influenza,but the beginning of winter peak was much earlier and intensity of reporting was much higher on the clusters of pandemic (H1N1 ) 2009 than that of seasonal influenza.