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Volume 17, Number 8—August 2011

Research

Incidence of Acute Gastroenteritis and Role of Norovirus, Georgia, USA, 2004–2005

Aron J. HallComments to Author , 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)

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Table 2

Pathogens detected among fecal specimens submitted by outpatients, by age group, to Kaiser Foundation Health Plan of Georgia, Inc., USA, March 15, 2004–March 13, 2005

Pathogen Age group, y, no. (%) positive
Total, n = 572
<5, n = 81 5–15, n = 63 16–25, n = 47 26–45, n = 190 46–65, n = 135 >65, n = 56
Virus 19 (23.5) 5 (7.9) 6 (12.8) 14 (7.4) 7 (5.2) 2 (3.6) 53 (9.3)
Norovirus 6 (7.4) 1 (1.6) 3 (6.4) 8 (4.2) 7 (5.2) 0 25 (4.4)
Astrovirus 5 (6.2) 1 (1.6) 1 (2.1) 3 (1.6) 0 0 10 (1.7)
Rotavirus 4 (4.9) 2 (3.2) 1 (2.1) 0 0 0 7 (1.2)
Sapovirus 4 (4.9) 0 1 (2.1) 0 1 (0.7) 1 (1.8) 7 (1.2)
Adenovirus
1 (1.2)
1 (1.6)
0
3 (1.6)
0
1 (1.8)
6 (1.0)
Bacteria 8 (9.9) 3 (4.8) 3 (6.4) 8 (4.2) 8 (5.9) 0 30 (5.2)
Clostridium difficile* 0 0 1 (2.1) 6 (3.2) 7 (5.2) 0 14 (2.4)
Salmonella spp. 6 (7.4) 1 (1.6) 1 (2.1) 0 0 0 8 (1.4)
Shigella spp. 2 (2.5) 1 (1.6) 0 2 (1.1) 0 0 5 (0.9)
Campylobacter spp.
0
1 (1.6)
1 (2.1)
0
1 (0.7)
0
3 (0.5)
Parasite† 1 (1.2) 1 (1.6) 1 (2.1) 4 (2.1) 0 0 7 (1.2)
Giardia spp. 0 1 (1.6) 0 4 (2.1) 0 0 5 (0.9)
Cryptosporidium spp.
1 (1.2)
1 (1.6)
0
0
0
0
2 (0.3)
Multiple‡
3 (3.7)
0
0
0
1 (0.7)
0
4 (0.7)
Any pathogen
26 (32.1)
9 (14.3)
10 (21.3)
26 (13.7)
15 (11.1)
2 (3.6)
88 (15.4)
Unidentified 55 (67.9) 54 (85.7) 37 (78.7) 164 (86.3) 120 (88.9) 54 (96.4) 484 (84.6)

*C. difficile testing performed on 161 (28.1%) of 572 total specimens; those not tested were classified as not positive.
†Parasite testing performed on 375 (65.6%) of 572 total specimens; those not tested were classified as not positive.
‡Combinations observed were Salmonella spp./norovirus, Salmonella spp./sapovirus, norovirus/sapovirus, and rotavirus/sapovirus.

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