title: Active, population-based surveillance for severe rotavirus gastroenteritis in children in the United States.
abstract: OBJECTIVE
  Routine vaccination of US infants against rotavirus was implemented in 2006, prompting the Centers for Disease Control and Prevention New Vaccine Surveillance Network to begin population-based acute gastroenteritis surveillance among US children<3 years of age. This surveillance system establishes baseline estimates of rotavirus disease burden and allows for the prospective monitoring of rotavirus vaccination impact.
  
  
  METHODS
  Eligible children with acute gastroenteritis (>or=3 episodes of diarrhea and/or any vomiting in a 24-hour period) who were hospitalized, were seen in emergency departments, or visited selected outpatient clinics in 3 US counties during the period of January through June 2006 were enrolled. Epidemiological and clinical information was obtained through parental interview and medical chart review, and stool specimens were tested for rotavirus with enzyme immunoassays. Rotavirus-positive specimens were genotyped by using reverse transcription-polymerase chain reaction assays.
  
  
  RESULTS
  Stool specimens were collected from 516 of the 739 enrolled children with acute gastroenteritis (181 inpatient, 201 emergency department, and 134 outpatient) and 44% tested positive for rotavirus (227 of 516 specimens). The most common strain was P[8]G1 (84%), followed by P[4]G2 (5%) and P[6]G12 (4%). None of the 516 children had received rotavirus vaccine. The rotavirus detection rate was 50% for hospitalized acute gastroenteritis cases, 50% for emergency department visits, and 27% for outpatient visits. Rotavirus-related acute gastroenteritis cases were more likely than non-rotavirus-related acute gastroenteritis cases to present with vomiting, diarrhea, fever, and lethargy. Directly calculated, population-based rates for rotavirus hospitalizations and emergency department visits were 22.5 hospitalizations and 301.0 emergency department visits per 10 000 children<3 years of age, respectively. A sentinel outpatient clinic visit rate of 311.9 outpatient visits per 10,000 children<3 years of age was observed.
  
  
  CONCLUSIONS
  Population-based, laboratory-confirmed rotavirus surveillance in the final rotavirus season before implementation of the US rotavirus vaccine program indicated a considerable burden of disease on the US health care system.
authors.affiliation: Epidemiology Branch, Division of Viral Diseases, National Center for Immunizations and Respiratory Disease, Centers for Disease Control and Prevention, 1600 Clifton Rd, NE, MS-A34, Atlanta, GA 30333, USA. dvp6@cdc.gov
authors.forename: Daniel C
authors.initials: DC
authors.lastname: Payne
authors.forename: Mary Allen
authors.initials: MA
authors.lastname: Staat
authors.forename: Kathryn M
authors.initials: KM
authors.lastname: Edwards
authors.forename: Peter G
authors.initials: PG
authors.lastname: Szilagyi
authors.forename: Jon R
authors.initials: JR
authors.lastname: Gentsch
authors.forename: Lauren J
authors.initials: LJ
authors.lastname: Stockman
authors.forename: Aaron T
authors.initials: AT
authors.lastname: Curns
authors.forename: Marie
authors.initials: M
authors.lastname: Griffin
authors.forename: Geoffrey A
authors.initials: GA
authors.lastname: Weinberg
authors.forename: Caroline B
authors.initials: CB
authors.lastname: Hall
authors.forename: Gerry
authors.initials: G
authors.lastname: Fairbrother
authors.forename: James
authors.initials: J
authors.lastname: Alexander
authors.forename: Umesh D
authors.initials: UD
authors.lastname: Parashar
mesh_terms: D000208:Acute Disease; D017677:Age Distribution; D002675:Child, Preschool; D003140:Communicable Disease Control / Q000379:methods; D005260:Female; D005759:Gastroenteritis / Q000453:epidemiology* / Q000517:prevention & control* / Q000821:virology; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D015994:Incidence; D007223:Infant; D008297:Male; D011159:Population Surveillance; D018570:Risk Assessment; D012401:Rotavirus / Q000276:immunology* / Q000302:isolation & purification; D012400:Rotavirus Infections / Q000453:epidemiology* / Q000517:prevention & control; D022243:Rotavirus Vaccines / Q000008:administration & dosage*; D012720:Severity of Illness Index; D017678:Sex Distribution; D014481:United States / Q000453:epidemiology; D014611:Vaccination / Q000592:standards / Q000639:trends
chemical_list: D022243:Rotavirus Vaccines