Incidence of Acute Gastroenteritis and Role of Norovirus, Georgia, USA, 2004–2005
Aron J. Hall , Mariana Rosenthal, Nicole Gregoricus, Sharon A. Greene, Jeana Ferguson, Olga L. Henao, Jan Vinjé, Ben A. Lopman, Umesh D. Parashar, and Marc-Alain Widdowson
Author affiliations: Author affiliations: Centers for Disease Control and Prevention, Atlanta, Georgia, USA (A.J. Hall, M. Rosenthal, N. Gregoricus, S.A. Greene, O.L. Henao, J. Vinjé, B.A. Lopman, U.D. Parashar, M.-A. Widdowson); University of Michigan, Ann Arbor, Michigan, USA (M. Rosenthal); Kaiser Permanente, Atlanta (J. Ferguson)
Figure 1. Equations used for calculation of community and outpatient incidence of each pathogen in patients with acute gastroenteritis (AGE), Kaiser Foundation Health Plan of Georgia, Inc., USA, March 15, 2004–March 13, 2005. Pi, prevalence of pathogen i in stool samples; S, total no. stool samples submitted; ComSSi, pathogen-specific fecal specimen submission rates among all respondents with AGE; N, total Kaiser membership; OutSSi, pathogen-specific fecal specimen submission rates among those seeking medical care; Sia, no. of stools positive for pathogen i in age group a; ComSSa, proportion of those in age group a with AGE who seek care and submit stool specimen; OutSSa, proportion of those in age group a seeking care for AGE who submit stool specimen.
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