Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2009 Jun;15(6):892-8.
doi: 10.3201/eid1506.081645.

Case-based surveillance of influenza hospitalizations during 2004-2008, Colorado, USA

Rosemary Proff  1 , Ken Gershman, Dennis Lezotte, Ann-Christine Nyquist
Affiliations

Case-based surveillance of influenza hospitalizations during 2004-2008, Colorado, USA

Rosemary Proff et al. Emerg Infect Dis. 2009 Jun.

Abstract

Colorado became the first state to make laboratory-confirmed influenza-associated hospitalizations a case-based reportable condition in 2004. We summarized surveillance for influenza hospitalizations in Colorado during the first 4 recorded influenza seasons (2004-2008). We highlight the similarities and differences among influenza seasons; no 2 seasons were entirely the same. The 2005-06 influenza season had 2 distinct waves of activity (types A and B), the 2006-07 season was substantially later and milder, and 2007-08 had substantially greater influenza B activity. The case-based surveillance for influenza hospitalizations provides information regarding the time course of seasonal influenza activity, reported case numbers and population-based rates by age group and influenza virus type, and a measure of relative severity. Influenza hospitalization surveillance provides more information about seasonal influenza activity than any other surveillance measure (e.g., surveillance for influenza-like illness) currently in widespread use among states. More states should consider implementing case-based surveillance for influenza hospitalizations.

PubMed Disclaimer

Figures

Figure 1
Figure 1
Hospitalized influenza patients in Colorado, USA, by week of diagnosis and influenza season.
Figure 2
Figure 2
Hospitalized influenza patients in Colorado, USA, by week of diagnosis and influenza type, 2005–06 season.
Figure 3
Figure 3
Hospitalized influenza patients in Colorado, USA, by week of diagnosis and region, 2005–06 season.
Figure 4
Figure 4
Rates of reported influenza hospitalizations in Colorado, USA, by age group and influenza type, 2007–08 season.
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

References

    1. Thompson WW, Shay DK, Weintraub E, Brammer L, Cox N, Anderson LJ, et al. Mortality associated with influenza and respiratory syncytial virus in the United States. JAMA. 2003;289:179–86. 10.1001/jama.289.2.179 - DOI - PubMed
    1. Thompson WW, Shay DK, Weintraub E, Brammer L, Bridges CB, Cox NJ, et al. Influenza-associated hospitalizations in the United States. JAMA. 2004;292:1333–40. 10.1001/jama.292.11.1333 - DOI - PubMed
    1. Centers for Disease Control and Prevention. Influenza [cited 2008 26 Jul]. Available from http://www.cdc.gov/flu
    1. Centers for Disease Control and Prevention. Surveillance for laboratory-confirmed, influenza-associated hospitalizations—Colorado, 2004–05 influenza season. MMWR Morb Mortal Wkly Rep. 2005;54:535–7. - PubMed
    1. Colorado Department of Public Health and Environment. Summaries of previous influenza seasons [cited 2008 Oct 26]. Available from http://www.cdphe.state.co.us/dc/Influenza/index.html

Publication types

MeSH terms

LinkOut - more resources