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Objective@#To understand the characteristics relating to the etiology and complications of hand, foot and mouth disease (HFMD) based on data from the pilot National Sentinel Surveillance (NSS) program so as to explore the feasibility, advantages and disadvantages of the NSS.@*Methods@#Data were extracted from the NSS system, conducted in 11 provinces of China from November 2015 to October 2016. Characteristics regarding the etiology, complications of HFMD and factors related to the positive rates of HFMD specimens were analyzed under the logistic regression method by SPSS 20.0 software.@*Results@#A total of 4 783 specimens were collected, including 3 390 from mild, 1 390 from severe and 3 from death cases. The overall positive rate was 81.43% (3 895/4 783). Other enteroviruses (non EV71/Cox A16 enteroviruses) appeared the major serotype (52.68%, 1 482/2 813) for mild infection of the disease while EV71 was for the severe cases (65.31%, 706/1 081). The serotype spectrum revealed by the pilot NSS was almost identical with the existing surveillance system. Other enteroviruses tended to infect younger children (χ2=130.17, P<0.001) than EV71 and Cox A16, in China. The multivariate logistic regression results showed that higher positive rate was associated with specimens which were collected from males, at children’ hospitals, in peak seasons, timely and in stools. The positive rates presented downwarding trends with the extension of the onset-sampling interval (χ2=14.47, P<0.001 in stool specimen; χ2=31.99, P<0.001 in throat swab; χ2=24.26, P<0.001 in anal swab). Aseptic meningitis, non-brainstem encephalitis and brainstem encephalitis appeared the top three complications of both EV71-associated and other enteroviruses-associated severe HFMD cases.@*Conclusions@#Factors as gender, season/place/timeliness of specimen collection, and types of hospital all appeared independently influenced the positive rates. NSS seemed feasible to be used as an alternative or supplement tool to the existing surveillance program in China.
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Objective To investigate the clinical severity,etiological classification and risk factors of severe cases with hand,foot and mouth disease (HFMD).Methods A total of 1 489 records on severe and fatal HFMD cases reported to the national pilot surveillance system of HFMD were used to analyze the demographic,medical treatment,etiological classification of the cases.Treatment outcome related risk factors were also studied with multi-variable stepwise logistic regression method.Results Seven out of the 1 489 severe HFMD cases died of this disease.A total of 960 (72.9％) were under three years old and 62.9％ were male and most of the cases (937,62.9％) resided in rural areas.Among all the cases,494 (33.2％) went to seek the first medical assistance at the institutions of village or township level.Durations between disease onset and first medical attendance,being diagnosed as the disease or diagnosed as severe cases were 0(0-1) d,1 (0-2) d and 2 (1-4) d,respectively.In total,773 (51.9％) of the severe HFMD cases were diagnosed as with aseptic meningitis,260 (17.5％) with brainstem encephalitis,377 (25.3 ％) with non-brainstem encephalitis,6 (0.4％) with encephalomyelitis,1 (0.1％) with acute flaccid paralysis,4 (0.3％) with pulmonary hemorrhage/pulmonary edema and 68 (4.6％) with cardiopulmonary failure.Of the etiologically diagnosed 1 217 severe and fatal HFMD cases,642 (52.8％) were with EV71,other enterovirus 261 (21.5％),Cox A16 36 (3.0％),1 (0.1％) with both EV71 and Cox A16.However,277 (22.8％) showed negative on any pathogenic virus.Complication (Z=3.15,P=0.002) and duration between onset and diagnosed as severe cases (Z=3.95,P＜0.001) were shown as key factors related to treatment outcomes.Conclusions Most severe HFMD cases appeared in boys,especially living in the rural areas.Frequently seen complications would include aseptic meningitis,non-brainstem encephalitis and brainstem encephalitis.EV71 was the dominant etiology for severe and fatal cases.Early diagnosis and complication control were crucial,related to the treatment outcome of HFMD.
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Objective To understand the characteristics and relation of clinical stage and outcome of severe cases on hand,foot and mouth disease (HFMD) and to establish the evaluation method for understanding severity of this disease.Methods According to factors as geographical location,economic and epidemic levels,five provinces (Henan,Shandong,Yunnan,Zhejiang and Sichuan provinces) were selected.Reported severe cases of HFMD from the National Notifiable Diseases Reporting System were selected randomly in the five provinces.Basic epidemiological information,clinical data,and pathogen testing results in the involved hospitals were collected.Clinical stages on all the patients were decided in accordance with "the clinical expert consensus on diagnosis and treatment for severe case of enterovirus type 71 (EV71) infections (2011 edition)".Data were analyzed using SPSS software 18.0 and other epidemiological methods.Results A total of 657 severe HFMD cases were investigated,with 326 cases positive of EV71,accounting for 91.3％ (326/357) among all the laboratory-confirmed cases.Of the 657 cases,542 cases (82.5％,95％CI:79.4％-85.3％) were diagnosed as in stage 2 (with nervous system involvement),99 cases (15.1％,95％CI:12.4％-18.0％) in stage 3 (early phase of function failure on heart and lung),and 16 cases (2.4％,95％CI:1.4％-3.9％) were in stage 4 (function failure of heart and lung).11 cases (1.7％,95％CI:0.9％-3.0％) were with squeal when discharged from hospital with 8 cases (1.2％,95％CI:0.6％-2.3％) died.When comparing the proportions among stage 2,stage 3 and stage 4,significant differences were found between age groups (x2=22.632,P=0.012).The younger the patient was the lower the proportions of stage 2 and the more proportion of stage 3 appeared.When comparing the proportions of clinical stages among the five provinces,significant differences (x2=41.481,P =0.000) were noticed.Proportions of different clinical stages in gender,ethnicity,occupation,place of residence types and the type of pathogen appeared no significant differences,respectively.However,the proportions of squeal and death in stage 2,stage 3 and stage 4 showed significant differences (sequela:x2=12.960,P=0.001;Death:x 2=16.850,P=0.001),respectively.Conclusions The pcrccntage of clinical stages of severe HFMD patients related to the rate of squeal and death.Clinical staging can be used for assessing the clinical severity of complications and the effectiveness of treatment,of HFMD.
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Objective To investigate the clinical severity,etiological classification and risk factors of severe cases with hand,foot and mouth disease (HFMD).Methods A total of 1 489 records on severe and fatal HFMD cases reported to the national pilot surveillance system of HFMD were used to analyze the demographic,medical treatment,etiological classification of the cases.Treatment outcome related risk factors were also studied with multi-variable stepwise logistic regression method.Results Seven out of the 1 489 severe HFMD cases died of this disease.A total of 960 (72.9％) were under three years old and 62.9％ were male and most of the cases (937,62.9％) resided in rural areas.Among all the cases,494 (33.2％) went to seek the first medical assistance at the institutions of village or township level.Durations between disease onset and first medical attendance,being diagnosed as the disease or diagnosed as severe cases were 0(0-1) d,1 (0-2) d and 2 (1-4) d,respectively.In total,773 (51.9％) of the severe HFMD cases were diagnosed as with aseptic meningitis,260 (17.5％) with brainstem encephalitis,377 (25.3 ％) with non-brainstem encephalitis,6 (0.4％) with encephalomyelitis,1 (0.1％) with acute flaccid paralysis,4 (0.3％) with pulmonary hemorrhage/pulmonary edema and 68 (4.6％) with cardiopulmonary failure.Of the etiologically diagnosed 1 217 severe and fatal HFMD cases,642 (52.8％) were with EV71,other enterovirus 261 (21.5％),Cox A16 36 (3.0％),1 (0.1％) with both EV71 and Cox A16.However,277 (22.8％) showed negative on any pathogenic virus.Complication (Z=3.15,P=0.002) and duration between onset and diagnosed as severe cases (Z=3.95,P＜0.001) were shown as key factors related to treatment outcomes.Conclusions Most severe HFMD cases appeared in boys,especially living in the rural areas.Frequently seen complications would include aseptic meningitis,non-brainstem encephalitis and brainstem encephalitis.EV71 was the dominant etiology for severe and fatal cases.Early diagnosis and complication control were crucial,related to the treatment outcome of HFMD.
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Objective To understand the characteristics and relation of clinical stage and outcome of severe cases on hand,foot and mouth disease (HFMD) and to establish the evaluation method for understanding severity of this disease.Methods According to factors as geographical location,economic and epidemic levels,five provinces (Henan,Shandong,Yunnan,Zhejiang and Sichuan provinces) were selected.Reported severe cases of HFMD from the National Notifiable Diseases Reporting System were selected randomly in the five provinces.Basic epidemiological information,clinical data,and pathogen testing results in the involved hospitals were collected.Clinical stages on all the patients were decided in accordance with "the clinical expert consensus on diagnosis and treatment for severe case of enterovirus type 71 (EV71) infections (2011 edition)".Data were analyzed using SPSS software 18.0 and other epidemiological methods.Results A total of 657 severe HFMD cases were investigated,with 326 cases positive of EV71,accounting for 91.3％ (326/357) among all the laboratory-confirmed cases.Of the 657 cases,542 cases (82.5％,95％CI:79.4％-85.3％) were diagnosed as in stage 2 (with nervous system involvement),99 cases (15.1％,95％CI:12.4％-18.0％) in stage 3 (early phase of function failure on heart and lung),and 16 cases (2.4％,95％CI:1.4％-3.9％) were in stage 4 (function failure of heart and lung).11 cases (1.7％,95％CI:0.9％-3.0％) were with squeal when discharged from hospital with 8 cases (1.2％,95％CI:0.6％-2.3％) died.When comparing the proportions among stage 2,stage 3 and stage 4,significant differences were found between age groups (x2=22.632,P=0.012).The younger the patient was the lower the proportions of stage 2 and the more proportion of stage 3 appeared.When comparing the proportions of clinical stages among the five provinces,significant differences (x2=41.481,P =0.000) were noticed.Proportions of different clinical stages in gender,ethnicity,occupation,place of residence types and the type of pathogen appeared no significant differences,respectively.However,the proportions of squeal and death in stage 2,stage 3 and stage 4 showed significant differences (sequela:x2=12.960,P=0.001;Death:x 2=16.850,P=0.001),respectively.Conclusions The pcrccntage of clinical stages of severe HFMD patients related to the rate of squeal and death.Clinical staging can be used for assessing the clinical severity of complications and the effectiveness of treatment,of HFMD.
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<p><b>OBJECTIVE</b>To investigate pathogens and molecular-epidemiology characteristics of viral meningoencephalitis in the monitoring sites of Zhejiang province, 2013.</p><p><b>METHODS</b>Cerebrospinal fluid and/or stool specimens were collected from suspected patients admitted to the monitoring hospitals in southern and northern Zhejiang province. Such specimen were subject to real-time qPCR for the detection of Human enterovirus (HEV), Japanese encephalitis virus (JEV), Mumps virus (MuV), Herpes simplex virus (HSV) and Cytomegalovirus (CMV). HEVs were isolated using the RD and Hep-2 cell lines, while VP1 genes from all HEV-positive isolates or RNA-positive specimen were amplified, sequenced, for homology and evolution analysis.</p><p><b>RESULTS</b>92 (38.5%) of the 239 samples collected from 229 patients were detected as virus nucleic acid positive, including 87 HEV positive samples, 1 MuV positive, 2 HSV positive, and 2 CMV positive; of the 87 HEV positive samples, 38 were further determined to be Coxsackievirus (CV) and 49 as Echovirus (E). 56 HEV strains were isolated from 239 (23.4%) samples. From the 31 cerebral fluid specimen of nucleic acid positive yet virus isolation negative, the most specimen were identified with E9 (9 specimen), followed by CVA9 (8 specimen); the viral serotype of Zhejiang province HEV were CVA9, CVB4, CVB5, E6, E7, E9, E11, E14, E16, E25 and E30, respectively. Predominant epidemic strains identified at southern and northern Zhejiang province were CVB5 and E6 respectively. The phylogenetic analysis of VP1 gene showed that all the HEV isolates in Zhejiang province were HEV-B.</p><p><b>CONCLUSION</b>The HEV-B was the main pathogen for viral meningoencephalitis in Zhejiang province in 2013, including 11 serotypes, while E7 was the first time to be isolated in Zhejiang province. The predominant isolates were CVB5 and E6 in southern and northern Zhejiang province respectively. The positive rate of viral nucleic acid detection was significantly higher than that of viral isolation. Regular EV isolation method was exposed to the risk of missing-detection of E9 and CVA9.</p>
Subject(s)
Humans , Biological Evolution , China , Epidemiology , Cytomegalovirus , Encephalitis Virus, Japanese , Encephalitis, Viral , Enterovirus , Enterovirus B, Human , Hepatitis E virus , Meningitis, Viral , Epidemiology , Genetics , Meningoencephalitis , Molecular Epidemiology , Mumps virus , PhylogenyABSTRACT
Objective To review the epidemiologic features of norovirus infection outbreaks in Zhejiang province during 2004-2014.Methods Epidemiological data of norovirus infection outbreaks in Zhejiang province from January 2004 to February 2014 were collected from the Emergency Public Reporting System in Zhejiang Provincial CDC.The distribution of time,area,population,route of transmission and genotype of norovirus were analyzed.Results There were 16 outbreaks of norovirus infections with 2 037 cases during 2004-2014 in Zhejiang province.Eleven outbreaks occurred during February and April,and 13 outbreaks occurred in schools.The outbreaks in schools mainly involved students aged 15-20 years,while other outbreaks took place mainly in the young and middle-aged population.The sex ratio of male to female was 1.05 ∶ 1.Among 16 outbreaks,10 were induced by norovirus G Ⅱ infections,3 were induced by norovirus G Ⅰ infections and 3 were induced by norovirus G Ⅰ and G Ⅱ infections.Fourteen outbreaks were caused by water pollution.Conclusion Outbreak of norovirus infection usually occurs in schools during winter and spring in Zhejiang province,and the epidemic of disease is mainly associated with polluted water.