North Carolina Influenza Sentinel Surveillance Program

North Carolina Influenza Update

May 24, 2007

I. Influenza-Like Illnesses Reported by N.C. Sentinel Sites
Week Number	Ending	Number ILI	Patient Visits	Percent ILI
40	10/7/2006	49	18,344	0.26%
41	10/14/2006	63	19,460	0.32%
42	10/21/2006	61	19,584	0.31%
43	10/28/2006	87	22,865	0.38%
44	11/4/2006	172	25,913	0.66%
45	11/11/2006	129	24,976	0.51%
46	11/18/2006	109	20,182	0.54%
47	11/25/2006	135	17,624	0.76%
48	12/2/2006	280	26,940	1.03%
49	12/9/2006	277	23,680	1.16%
50	12/16/2006	556	21,899	2.53%
51	12/23/2006	530	17,907	2.95%
52	12/30/2006	367	14,155	2.59%
01	1/6/2007	261	18,205	1.43%
02	1/13/2007	229	22,937	0.99%
03	1/20/2007	188	22,822	0.82%
04	1/27/2007	199	25,063	0.79%
05	2/3/2007	264	23,639	1.11%
06	2/10/2007	355	26,047	1.36%
07	2/17/2007	547	30,533	1.79%
08	2/24/2007	604	23,865	2.53%
09	3/3/2007	411	23,814	1.72%
10	3/10/2007	326	22,171	1.47%
11	3/17/2007	246	19,637	1.25%
12	3/24/2007	179	20,061	0.89%
13	3/31/2007	121	18,060	0.66%
14	4/07/2007	65	16,675	0.38%
15	4/14/2007	74	15,579	0.47%
16	4/21/2007	83	16,713	0.49%
17	4/28/2007	55	16,283	0.33%
18	5/5/2007	67	12,954	0.51%
19	5/12/2007	53	9,236	0.57%
20	05/19/2007	50	7,965	0.62%

Percentage of Visits for Influenza-like Illness
Reported by Sentinel Providers
North Carolina, 2006-2007(Red Line)
With Comparative 2005-2006(Blue Line)
With Comparative 2004-2005 Data(Yellow Line)
and Comparative 2003-2004 Data(Light Blue Line) Graph illustrating the percentage of visits for ILI

Influenza-Like Illness Surveillance in North Carolina, 2006-2007
Comparative trend between two surveillance systems:
Sentinel Provider Network (SPN) and Hospital Emergency Department (ED)
Comparison of the Sentinel Reports with Reports from the Hospital Emergency Departments

Comparison of the Sentinel Reports with Reports from the Hospital Emergency Departments

SPN: 74 volunteer practitioners report weekly their patient workload; using ILI case definition:
"fever and cough or sore throat."
ED: As of 5/19/2007, 103 hospitals report daily ED visits electronically through the NC DETECT System, using ILI case definition: "ILI cases must include any case with the term “flu” or “influenza” or have at least one fever term and one influenza-related symptom."

II. Influenza Virus Isolates Identified
by the State Laboratory of Public Health
During the 2006-2007 Influenza Season
Week Number	Ending	Total Confirmed	County	Virus Type	No. Isolates of Same Virus
40	10/7/2006	00	N/A	N/A	0
41	10/14/2006	00	N/A	N/A	0
42	10/21/2006	00	N/A	N/A	0
43	10/28/2006	00	N/A	N/A	0
44	11/04/2006	14	Nash	B	3
			Pitt	B	1
			Union	B	1
			Watauga	B	1
			Yancey	B	8
45	11/11/2006	12	Mitchell	B	6
			Pitt	B	1
			Yancey	B	5
46	11/18/2006	05	Alleghany	A/H1	1
			Buncombe	B	1
			Cabarrus	A/H1	1
			Rowan	A/H1	1
			Wake	A/H1	1
47	11/25/2006	03	Avery	B	1
47	11/25/2006	03	Wake	B	2
48	12/2/2006	10	Buncombe	B	2
			Cabarrus	A/H1	1
			Pitt	B	1
			Union	A/H1	2
			Wake	A/H1	2
			Wake	B	1
			Watauga	B	1
49	12/9/2006	08	Jones	A/H1	1
			Haywood	A/H1	2
			Haywood	B	1
			Johnston	A/H1	1
			Wake	A/H1	2
			Wilkes	A/H1	1
50	12/16/2006	18	Buncombe	B	2
			Cabarrus	A/H1	3
			Caldwell	A/H1	1
			Durham	A/H1	2
			Orange	A/H1	1
			Pitt	A/H1	1
			Pitt	B	1
			Union	A/H1	6
			Wake	A/H1	1
51	12/23/2006	36	Buncombe	A/H1	1
			Cabarrus	A/H1	8
			Cabarrus	B	2
			Caldwell	A/H1	2
			Caldwell	B	1
			Henderson	B	1
			Jackson	A/H1	1
			Mecklenburg	A/H1	1
			Pitt	B	3
			Union	A/H1	2
			Union	B	1
			Wake	A/H1	8
			Wake	B	1
			Watauga	A/H1	1
			Wilkes	A/H1	2
			Yancey	B	2
52	12/30/2006	36	Buncombe	A/H1	4
			Buncombe	B	6
			Cabarrus	A/H1	1
			Cumberland	A/H1	1
			Granville	A/H1	1
			Jackson	A/H1	1
			Jackson	B	1
			Mecklenburg	A/H1	13
			Pitt	A/H1	1
			Stanley	A/H1	3
			Stanley	B	1
			Union	A/H1	3
01	1/6/2007	13	Buncombe	A/H1	1
			Buncombe	B	1
			Forsyth	A/H1	1
			Jackson	A/H1	2
			Mecklenburg	A/H1	4
			Pitt	A/H1	3
			Rockingham	A/H1	1
02	1/13/2007	07	Buncombe	A/H1	1
			Cabarrus	A/H1	1
			Cumberland	A/H1	3
			Hertford	A/H1	1
			Rockingham	A/H1	1
03	1/20/2007	07	Alleghany	B	1
			Cumberland	A/H1	1
			Franklin	B	2
			Orange	B	1
			Wake	A/H1	1
			Yancey	A/H1	1
04	1/27/2007	15	Buncombe	B	1
			Catawba	B	1
			Cumberland	A/H1	1
			Durham	A/H1	1
			Forsyth	B	1
			Mecklenburg	A/H1	4
			Mecklenburg	B	1
			Orange	A/H3	1
			Vance	A/H1	2
			Wake	A/H3	2
05	2/3/2007	08	Anson	B	1
			Buncombe	A/H3	1
			Durham	A/H1	2
			Robeson	A/H1	1
			Vance	A/H1	1
			Wake	A/H3	1
			Watauga	B	1
06	2/10/2007	15	Buncombe	A/H1	1
			Buncombe	B	1
			Durham	A/H1	2
			Granville	B	1
			Guilford	B	3
			Jones	A/H3	1
			Orange	A/H3	1
			Orange	B	1
			Pender	A/H1	2
			Wake	A/H1	1
			Wake	A/H3	1
07	2/17/2007	23	Anson	B	1
			Buncombe	B	1
			Cabarrus	B	1
			Cumberland	A/H1	1
			Durham	A/H3	1
			Durham	B	1
			Graham	B	1
			Henderson	B	1
			Northampton	B	2
			Orange	A/H1	1
			Orange	A/H3	2
			Wake	A/H1	1
			Watauga	A/H1	3
			Watauga	B	6
08	2/24/2007	26	Buncombe	B	3
			Cabarrus	B	3
			Durham	A/H3	1
			Durham	B	3
			Lee	B	1
			Northampton	B	1
			Pitt	B	1
			Wake	B	1
			Watauga	B	12
09	3/3/2007	22	Cabarrus	B	3
			Caldwell	B	1
			Cumberland	A/H1	1
			Durham	A/H3	1
			Edgecombe	B	1
			Henderson	B	2
			Hertford	B	1
			Montgomery	B	1
			Pitt	A/H1	5
			Rockingham	B	1
			Rowan	B	1
			Union	B	2
			Wake	B	1
			Watauga	B	1
10	3/10/2007	04	Hyde	B	1
			Cabarrus	B	2
			Montgomery	B	1
11	3/17/2007	05	Buncombe	B	1
			Forsyth	B	1
			Hertford	B	1
			Jackson	A/H3	1
			Montgomery	B	1
12	3/24/2007	07	Buncombe	A/H3	1
			Caldwell	B	1
			Durham	A/H3	1
			Durham	B	1
			Jackson	B	1
			Lee	B	1
			Onslow	B	1
13	3/31/2007	00	N/A	N/A	N/A
14	4/7/2007	00	N/A	N/A	N/A
15	4/14/2007	00	N/A	N/A	N/A
16	4/21/2007	02	Caldwell	B	1
16	4/21/2007	02	Hertford	B	1
17	4/28/2007	01	Watauga	B	1
18	5/5/2007	00	N/A	N/A	N/A
19	5/12/2007	00	N/A	N/A	N/A
20	5/19/2007	00	N/A	N/A	N/A
TOTAL ISOLATES IDENTIFIED TO DATE				A/H1	137
				A/H3	17
				B	145
				Total	299

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Page last updated on May 24, 2007