title: Changes in enterovirus serotype constituent ratios altered the clinical features of infected children in Guangdong Province, China, from 2010 to 2013.
abstract: Enterovirus (EV)-related hand, foot, and mouth disease/herpangina (HFMD/HA) has been prevalent in Guangdong Province, China, since 2010.
  
  
  
  Clinical data for EV-related HFMD/HA inpatients admitted to the Department of Paediatrics of Zhujiang Hospital from 2010 to 2013 were retrospectively reviewed. The corresponding EV serotypes were also determined by reverse transcription-polymerase chain reaction or BLAST analysis of the sequenced partial lengths of the viral protein1/5'-untranslated region.
  
  
  
  A total of 867 eligible inpatients admitted during 2010-2013 were included in the study. Of these, the serotype of the responsible EV was successfully identified in 824 cases. The incidence of enterovirus 71 (EV71) infection amongst pediatric HFMD/HA inpatients decreased dramatically from 55.5 % in 2010 to 8.1 % in 2013, with a similar decrease recorded for coxsackievirus A16 (CVA16). However, the incidence of non-EV71/CVA16 infection increased from 30.0 % in 2010 to 83.8 % in 2013. We noted that the types of infection caused by different EV serotypes varied: EV71 was responsible for 100 % of the paralysis cases (26/26), 84.6 % of the deaths (11/13), and 84.1 % of cases with severe central nervous system involvement (SCNSI) (74/88); echovirus contributed to 16.4 % of the deaths (2/13) and 4.4 % of the SCNSI cases; and coxsackievirus accounted for only 2.2 % of the SCNSI cases (2/90). The clinical features of HFMD/HA cases varied greatly during the time period examined, with drastic changes in the hospitalization rates (45.1, 63.7, 36.4, and 19.1 % for 2010, 2011, 2012, and 21013, respectively), mortality rates (2.3, 0.9, 2.5, and 0.0 %, respectively), paralysis (5.1, 1.2, 5.4, and 0.0 %, respectively), SCNSI (16.8, 7.1, 12.7, and 2.2 %, respectively), and acute respiratory infection (21.1, 22.0, 45.9, and 59.0 %, respectively).
  
  
  
  The incidences of infection caused by different EV serotypes, along with the clinical features of HFMD/HA cases, changed drastically in Guangdong Province, China, from 2010 to 2013, with the biggest changes observed in 2013. The changed constituent ratios of the different EV serotypes might therefore be responsible for the differences in the observed clinical features of HFMD/HA during this period.
authors: Laboratory of Emerging Infectious Diseases and Division of Laboratory Medicine, Zhujiang Hospital, Southern Medical University, No. 253 Gong ye da dao zhong, Guangzhou, 510282, People's Republic of China. apollo_zhou@126.com.|Department of Clinical Laboratory, Hainan Provincial People's Hospital, No. 19 Xiuhua road, Haikou, 570311, People's Republic of China. apollo_zhou@126.com.
authors: Hong-Tao
authors: HT
authors: Zhou
authors: Laboratory of Emerging Infectious Diseases and Division of Laboratory Medicine, Zhujiang Hospital, Southern Medical University, No. 253 Gong ye da dao zhong, Guangzhou, 510282, People's Republic of China.
authors: Yong-Hui
authors: YH
authors: Guo
authors: Laboratory of Emerging Infectious Diseases and Division of Laboratory Medicine, Zhujiang Hospital, Southern Medical University, No. 253 Gong ye da dao zhong, Guangzhou, 510282, People's Republic of China.
authors: Man-Jun
authors: MJ
authors: Chen
authors: Laboratory of Emerging Infectious Diseases and Division of Laboratory Medicine, Zhujiang Hospital, Southern Medical University, No. 253 Gong ye da dao zhong, Guangzhou, 510282, People's Republic of China.
authors: Yu-Xian
authors: YX
authors: Pan
authors: Laboratory of Emerging Infectious Diseases and Division of Laboratory Medicine, Zhujiang Hospital, Southern Medical University, No. 253 Gong ye da dao zhong, Guangzhou, 510282, People's Republic of China.
authors: Lin
authors: L
authors: Xue
authors: Department of Paediatrics, Zhujiang Hospital, Southern Medical University, Guangdong, 510282, People's Republic of China.
authors: Bin
authors: B
authors: Wang
authors: Department of Paediatrics, Zhujiang Hospital, Southern Medical University, Guangdong, 510282, People's Republic of China.
authors: Shao-Hua
authors: SH
authors: Tao
authors: Laboratory of Emerging Infectious Diseases and Division of Laboratory Medicine, Zhujiang Hospital, Southern Medical University, No. 253 Gong ye da dao zhong, Guangzhou, 510282, People's Republic of China. yunanzhujiang@163.com.
authors: Nan
authors: N
authors: Yu
mesh_terms: D002648:Child; D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D004770:Enterovirus / Q000472:pathogenicity*; D029822:Enterovirus B, Human / Q000472:pathogenicity; D004769:Enterovirus Infections / Q000453:epidemiology* / Q000209:etiology* / Q000821:virology; D006232:Hand, Foot and Mouth Disease / Q000453:epidemiology / Q000209:etiology / Q000821:virology; D006557:Herpangina / Q000453:epidemiology / Q000209:etiology / Q000821:virology; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D012189:Retrospective Studies; D065288:Serogroup
keywords: Clinical features; Enterovirus; Foot and mouth disease; Hand; Serotype