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BACKGROUND

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Impact of the Severity of Seasonal Influenza-like Illnesses (ILI) and Heptavalent Pneumococcal Conjugate Vaccine (PCV7) on Invasive Pneumococcal Disease (IPD) in Children and Adults at a Health System in New York.

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Presentation Transcript
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Impact of the Severity of Seasonal Influenza-like Illnesses (ILI) and Heptavalent Pneumococcal Conjugate Vaccine (PCV7) on Invasive Pneumococcal Disease (IPD) in Children and Adults at a Health System in New York

Lorry G. Rubin1, Shideh Shafinoori1, Christine C. Ginocchio1, Abby J. Greenberg2, Elaine A. Yeoman2 and Minawatee Cheddie2

(1) North Shore Long Island Jewish Health System

New Hyde Park, NY and

(2) Nassau County Department of Health

Mineola, NY

background
BACKGROUND
  • Viral upper respiratory influenza-like illnesses (ILI) predispose to invasive pneumococcal disease (IPD)
  • Use of heptavalent pneumococcal vaccine (PCV7) should reduce incidence of IPD
objective
OBJECTIVE
  • To determine if the observed decrease in IPD following the use of PCV7 vaccine is partially due to variations in the rate of Influenza-like illness
methods
METHODS
  • Determine and compare rates of IPD and ILI
    • 2 years before routine PCV 7 use (7/98 - 6/00)
    • during routine PCV7 use (7/00 - 6/03)
calculations
CALCULATIONS
  • Invasive Pneumococcal Disease (IPD) Rate
    • Cases/season IPD in 7 hospitals in a single health care system
  • Emergency Department (ED) Visits
    • Visits/season in the 7 hospital system
  • Influenza-like Illness (ILI) Incidence
    • Reports from all 13 hospitals in county where most of the system hospitals are
    • reports from all schools in same county
analyses
ANALYSES
  • 634 IPD cases identified in the 7 hospitals in a health care system in the 5 year period 1998 - 2003
  • 67% IPD cases occurred during the influenza season (November - April)
  • Rates of IPD episodes (cases/105 ED visits) compared before vs during PCV7 years
  • ILI reports compared before vs during PCV7 years
conclusion
CONCLUSION
  • Milder ILI seasons during the PCV7 period may have contributed to the reduction in IPD rates
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