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Volume 19, Number 8—August 2013

Dispatch

Norovirus Surveillance among Callers to Foodborne Illness Complaint Hotline, Minnesota, USA, 2011–2013

Amy A. SaupeComments to Author , Dawn Kaehler, Elizabeth A. Cebelinski, Brian Nefzger, Aron J. Hall, and Kirk E. Smith
Author affiliations: Minnesota Department of Health, St. Paul, Minnesota, USA (A.A. Saupe, D. Kaehler, E.A. Cebelinski, B. Nefzger, K.E. Smith); Centers for Disease Control and Prevention, Atlanta, Georgia, USA (A.J. Hall)

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Table 2

Results for testing of stool samples submitted by callers to foodborne illness hotline, by month of complainant illness onset, Minnesota, October 2011–January 2013

Year and month Total no. complainants No. (%) eligible to submit sample* No. (%) tested No. (%) positive for
Any norovirus Norovirus genogroup I† Norovirus genogroup II†
2011
Oct 48 28 (58.3) 12 (42.9) 5 (41.7) 1 (20.0) 4 (80.0)
Nov 52 37 (71.2) 19 (51.4) 13 (68.4) 1 (7.7) 12 (92.3)
Dec
117
70 (59.8)
28 (40.0)
17 (60.7)
4 (23.5)
13 (76.5)
2012
Jan 96 62 (64.6) 24 (38.7) 19 (79.2) 2 (10.5) 17 (89.5)
Feb‡ 67 46 (68.7) 21 (45.7) 15 (71.4) 2 (13.3) 12 (80.0)
Mar 79 40 (50.6) 16 (40.0) 10 (62.5) 2 (20.0) 8 (80.0)
Apr 57 34 (59.6) 20 (58.8) 6 (30.0) 1 (16.7) 5 (83.3)
May 54 38 (70.4) 13 (34.2) 3 (23.1) 1 (33.3) 2 (66.7)
Jun 51 29 (56.9) 8 (27.6) 2 (25.0) 2 (100.0) 0
Jul 54 26 (48.1) 11 (42.3) 3 (27.3) 3 (100.0) 0
Aug 62 35 (56.5) 10 (28.6) 3 (30.0) 0 3 (100.0)
Sep 46 30 (65.2) 7 (23.3) 2 (28.6) 0 2 (100.0)
Oct 80 47 (58.8) 17 (36.2) 8 (47.1) 1 (12.5) 7 (87.5)
Nov 79 46 (58.2) 11 (23.9) 5 (45.5) 2 (40.0) 3 (60.0)
Dec
76
44 (57.9)
16 (36.4)
13 (81.3)
0
13 (100.0)
2013 Jan
42
21 (50.0)
8 (38.1)
3 (37.5)
0
3 (100.0)
Total 1,060 633 (59.7) 241 (38.1) 127 (52.7) 22 (17.3) 104 (81.9)

*All samples tested at Minnesota Department of Health (MDH) Public Health Laboratory. Eligibility criteria: Minnesota residency, symptom eligibility (>3 loose stools in 24 h or vomiting), complaint received <4 d after vomiting/diarrhea onset or <2 d after vomiting/diarrhea recovery, and complainant interviewed by MDH staff. Completed complaints forwarded to MDH by local jurisdictions were excluded.
†Of those positive for norovirus.
‡One February complainant was positive for genogroups (not included in individual genogroup totals).

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