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Norovirus Infection

Norovirus Infection. April 15, 2010 Marcy McMillian Effie Boothe. What is norovirus?. Also known as Norwalk-like virus Caliciviruses (family Caliciviridae ) Small round structured viruses Viral infection Not improved with antibiotics Live only in human host

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Norovirus Infection

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  1. Norovirus Infection April15, 2010 Marcy McMillian Effie Boothe

  2. What is norovirus? • Also known as • Norwalk-like virus • Caliciviruses (family Caliciviridae) • Small round structured viruses • Viral infection • Not improved with antibiotics • Live only in human host • Most common cause of gastroenteritis outbreaks

  3. Symptoms • Nausea • Vomiting • Diarrhea • Abdominal cramping • Incubation 10-50 hours • Duration 1-2 days

  4. How is norovirus spread? • Found in stool or vomitus • Infection spreads by • Consuming contaminated food or liquids • Touching contaminated surfaces or objects • Person-to-person contact • Day care centers and nursing homes more vulnerable to both spread and effects of illness

  5. Treatment No vaccine or antibiotic available Supportive care --fluids --rest Hospitalization may occur in vulnerable groups IV rehydration may be indicated

  6. Outbreak Data

  7. Enteric Outbreaks 2005-2010N=255 Norovirus All other outbreaks # of outbreaks * * year * Preliminary data

  8. Norovirus by Transmission Mode

  9. Norovirus by Setting School/Daycare LTCF

  10. Norovirus Outbreaks 2005-2010N=112 LTCF All other outbreaks # of outbreaks * * year * Preliminary data

  11. Median Number ill from Norovirus Outbreaks by Year LTCF All other settings Median # ill * * year * Preliminary data

  12. Hospitalizations by Setting

  13. Prevention and Control

  14. Prevention and control of norovirus • Frequent handwashing • Wash fruits/vegetables, steam oysters • Cohort patients • Disinfect using bleach-based cleaner • Exclude food workers and HCWs for 48 hrs after symptoms end

  15. TDOH response to norovirus • Evaluation of trends • CDC recommendations • Laboratory capacity for identification increased

  16. …additional TDOH responses • Statewide annual review • Fact sheet for long term care facilities • Development of viral gastroenteritis fact sheet for Tennessee HDs

  17. Conclusions • Norovirus is a serious illness • Illness can spread quickly in congregate settings • Important to educate LTCF and other partners about prevention and control

  18. Thank You! • Effie Boothe: Effie.Boothe@tn.gov • Marcy McMillian: Marcy.McMillian@tn.gov 615-741-7247

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