Table 3. Open in new tab...

Characteristic	Participants With Influenza Positivity, No./Total No. (%; 95% CI)
Total	8/66 (12.1; 5.3–22.5)	1/66 (1.5; .1–8.1)	37/55 (67.3; 53.3–79.3)	49/62 (79.0; 66.8–88.3)
Age, y	P > .99	P = .35	P = .90	P > .99
20–30	1/7 (14.3; .0–57.9)	0/7 (0.0; .0–40.9)	4/6 (66.7; 22.3–95.7)	6/7 (85.7; 42.1–99.6)
31–45	5/41 (12.2; 4.1–26.2)	0/41 (0.0; .0–8.6)	24/34 (70.6; 52.5–84.9)	32/40 (80.0; 64.3–90.9)
46–60	2/15 (13.3; 1.6–40.4)	1/15 (6.7; .2–31.9)	8/13 (61.5; 31.6–86.1)	10/13 (76.9; 46.2–94.9)
Sex	P = .67	P = .98	P = .99	P = .16
Male	7/50 (14.0; 5.8–26.7)	1/50 (2.0; .1–10.6)	28/41 (68.3; 51.9–81.9)	35/47 (74.4; 68.1–99.8)
Female	1/16 (6.2; .1–30.2)	0/16 (0.0; .0–20.6)	9/14 (64.3; 35.1–87.2)	14/15 (93.3; 59.6–86.1)
Occupation	P = .65	P = .04	P = .003	P < .001
Abattoir worker	6/41 (14.6; 5.5–29.2)	0/41 (0.00; .0–8.6)	28/33 (84.8; 68.1–94.9)	37/39 (94.9; 82.7–99.4)
Farmworker	0/10 (0.0; .0–30.8)	0/10 (0.0; .0–30.8)	4/9 (44.4; 13.7–78.8)	3/9 (33.3; 7.5–70.1)
Farmer	0/1 (0.0; .0–95.0)	0/1 (0.0; .0–95.0)	0/1 (0.0; .0–95.0)	0/1 (0.0; .0–95.0)
Laboratory worker	1/4 (25.0; .6–80.6)	0/4 (00.0; .0–60.2)	2/3 (66.7; 9.4–99.1)	4/4 (100.0; 39.8–100.0)
Researcher	0/2 (0.0; .0–84.2)	1/2 (50.0; 1.2–98.7)	0/1 (0.0; .0–95.0)	1/1 (100.0; 2.5–100.0)
Veterinarian or veterinary technician	1/8 (12.5; .3–52.6)	0/8 (0.0; .0–36.9)	3/8 (37.5; 8.5–75.5)	4/8 (50.0; 15.7–84.3)

Characteristic

Participants With Influenza Positivity, No./Total No. (%; 95% CI)

A(H7N1)

A(H5N2)

A(H1N1)pdm09

A(H3N2)

Total

8/66 (12.1; 5.3–22.5)

1/66 (1.5; .1–8.1)

37/55 (67.3; 53.3–79.3)

49/62 (79.0; 66.8–88.3)

Age, y

P > .99

P = .35

P = .90

P > .99

20–30

1/7 (14.3; .0–57.9)

0/7 (0.0; .0–40.9)

4/6 (66.7; 22.3–95.7)

6/7 (85.7; 42.1–99.6)

31–45

5/41 (12.2; 4.1–26.2)

0/41 (0.0; .0–8.6)

24/34 (70.6; 52.5–84.9)

32/40 (80.0; 64.3–90.9)

46–60

2/15 (13.3; 1.6–40.4)

1/15 (6.7; .2–31.9)

8/13 (61.5; 31.6–86.1)

10/13 (76.9; 46.2–94.9)

Sex

P = .67

P = .98

P = .99

P = .16

Male

7/50 (14.0; 5.8–26.7)

1/50 (2.0; .1–10.6)

28/41 (68.3; 51.9–81.9)

35/47 (74.4; 68.1–99.8)

Female

1/16 (6.2; .1–30.2)

0/16 (0.0; .0–20.6)

9/14 (64.3; 35.1–87.2)

14/15 (93.3; 59.6–86.1)

Occupation

P = .65

P = .04

P = .003

P < .001

Abattoir worker

6/41 (14.6; 5.5–29.2)

0/41 (0.00; .0–8.6)

28/33
(84.8; 68.1–94.9)

37/39
(94.9; 82.7–99.4)

Farmworker

0/10 (0.0; .0–30.8)

4/9 (44.4; 13.7–78.8)

3/9 (33.3; 7.5–70.1)

Farmer

0/1 (0.0; .0–95.0)

Laboratory worker

1/4 (25.0; .6–80.6)

0/4 (00.0; .0–60.2)

2/3 (66.7; 9.4–99.1)

4/4 (100.0; 39.8–100.0)

Researcher

0/2 (0.0; .0–84.2)

1/2 (50.0; 1.2–98.7)

0/1 (0.0; .0–95.0)

1/1 (100.0; 2.5–100.0)

Veterinarian or veterinary technician

1/8 (12.5; .3–52.6)

0/8 (0.0; .0–36.9)

3/8 (37.5; 8.5–75.5)

4/8 (50.0; 15.7–84.3)

Characteristic	Participants With Influenza Positivity, No./Total No. (%; 95% CI)
Total	8/66 (12.1; 5.3–22.5)	1/66 (1.5; .1–8.1)	37/55 (67.3; 53.3–79.3)	49/62 (79.0; 66.8–88.3)
Age, y	P > .99	P = .35	P = .90	P > .99
20–30	1/7 (14.3; .0–57.9)	0/7 (0.0; .0–40.9)	4/6 (66.7; 22.3–95.7)	6/7 (85.7; 42.1–99.6)
31–45	5/41 (12.2; 4.1–26.2)	0/41 (0.0; .0–8.6)	24/34 (70.6; 52.5–84.9)	32/40 (80.0; 64.3–90.9)
46–60	2/15 (13.3; 1.6–40.4)	1/15 (6.7; .2–31.9)	8/13 (61.5; 31.6–86.1)	10/13 (76.9; 46.2–94.9)
Sex	P = .67	P = .98	P = .99	P = .16
Male	7/50 (14.0; 5.8–26.7)	1/50 (2.0; .1–10.6)	28/41 (68.3; 51.9–81.9)	35/47 (74.4; 68.1–99.8)
Female	1/16 (6.2; .1–30.2)	0/16 (0.0; .0–20.6)	9/14 (64.3; 35.1–87.2)	14/15 (93.3; 59.6–86.1)
Occupation	P = .65	P = .04	P = .003	P < .001
Abattoir worker	6/41 (14.6; 5.5–29.2)	0/41 (0.00; .0–8.6)	28/33 (84.8; 68.1–94.9)	37/39 (94.9; 82.7–99.4)
Farmworker	0/10 (0.0; .0–30.8)	0/10 (0.0; .0–30.8)	4/9 (44.4; 13.7–78.8)	3/9 (33.3; 7.5–70.1)
Farmer	0/1 (0.0; .0–95.0)	0/1 (0.0; .0–95.0)	0/1 (0.0; .0–95.0)	0/1 (0.0; .0–95.0)
Laboratory worker	1/4 (25.0; .6–80.6)	0/4 (00.0; .0–60.2)	2/3 (66.7; 9.4–99.1)	4/4 (100.0; 39.8–100.0)
Researcher	0/2 (0.0; .0–84.2)	1/2 (50.0; 1.2–98.7)	0/1 (0.0; .0–95.0)	1/1 (100.0; 2.5–100.0)
Veterinarian or veterinary technician	1/8 (12.5; .3–52.6)	0/8 (0.0; .0–36.9)	3/8 (37.5; 8.5–75.5)	4/8 (50.0; 15.7–84.3)

Table 3.

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Influenza-Seropositive Individuals Involved in the Control of the 2012 H7N1 Outbreak in the Western Cape Province, South Africa

Characteristic	Participants With Influenza Positivity, No./Total No. (%; 95% CI)
Characteristic	A(H7N1)	A(H5N2)	A(H1N1)pdm09	A(H3N2)
Total	8/66 (12.1; 5.3–22.5)	1/66 (1.5; .1–8.1)	37/55 (67.3; 53.3–79.3)	49/62 (79.0; 66.8–88.3)
Age, y	P > .99	P = .35	P = .90	P > .99
20–30	1/7 (14.3; .0–57.9)	0/7 (0.0; .0–40.9)	4/6 (66.7; 22.3–95.7)	6/7 (85.7; 42.1–99.6)
31–45	5/41 (12.2; 4.1–26.2)	0/41 (0.0; .0–8.6)	24/34 (70.6; 52.5–84.9)	32/40 (80.0; 64.3–90.9)
46–60	2/15 (13.3; 1.6–40.4)	1/15 (6.7; .2–31.9)	8/13 (61.5; 31.6–86.1)	10/13 (76.9; 46.2–94.9)
Sex	P = .67	P = .98	P = .99	P = .16
Male	7/50 (14.0; 5.8–26.7)	1/50 (2.0; .1–10.6)	28/41 (68.3; 51.9–81.9)	35/47 (74.4; 68.1–99.8)
Female	1/16 (6.2; .1–30.2)	0/16 (0.0; .0–20.6)	9/14 (64.3; 35.1–87.2)	14/15 (93.3; 59.6–86.1)
Occupation	P = .65	P = .04	P = .003	P < .001
Abattoir worker	6/41 (14.6; 5.5–29.2)	0/41 (0.00; .0–8.6)	28/33 (84.8; 68.1–94.9)	37/39 (94.9; 82.7–99.4)
Farmworker	0/10 (0.0; .0–30.8)	0/10 (0.0; .0–30.8)	4/9 (44.4; 13.7–78.8)	3/9 (33.3; 7.5–70.1)
Farmer	0/1 (0.0; .0–95.0)	0/1 (0.0; .0–95.0)	0/1 (0.0; .0–95.0)	0/1 (0.0; .0–95.0)
Laboratory worker	1/4 (25.0; .6–80.6)	0/4 (00.0; .0–60.2)	2/3 (66.7; 9.4–99.1)	4/4 (100.0; 39.8–100.0)
Researcher	0/2 (0.0; .0–84.2)	1/2 (50.0; 1.2–98.7)	0/1 (0.0; .0–95.0)	1/1 (100.0; 2.5–100.0)
Veterinarian or veterinary technician	1/8 (12.5; .3–52.6)	0/8 (0.0; .0–36.9)	3/8 (37.5; 8.5–75.5)	4/8 (50.0; 15.7–84.3)

Characteristic	Participants With Influenza Positivity, No./Total No. (%; 95% CI)
Characteristic	A(H7N1)	A(H5N2)	A(H1N1)pdm09	A(H3N2)
Total	8/66 (12.1; 5.3–22.5)	1/66 (1.5; .1–8.1)	37/55 (67.3; 53.3–79.3)	49/62 (79.0; 66.8–88.3)
Age, y	P > .99	P = .35	P = .90	P > .99
20–30	1/7 (14.3; .0–57.9)	0/7 (0.0; .0–40.9)	4/6 (66.7; 22.3–95.7)	6/7 (85.7; 42.1–99.6)
31–45	5/41 (12.2; 4.1–26.2)	0/41 (0.0; .0–8.6)	24/34 (70.6; 52.5–84.9)	32/40 (80.0; 64.3–90.9)
46–60	2/15 (13.3; 1.6–40.4)	1/15 (6.7; .2–31.9)	8/13 (61.5; 31.6–86.1)	10/13 (76.9; 46.2–94.9)
Sex	P = .67	P = .98	P = .99	P = .16
Male	7/50 (14.0; 5.8–26.7)	1/50 (2.0; .1–10.6)	28/41 (68.3; 51.9–81.9)	35/47 (74.4; 68.1–99.8)
Female	1/16 (6.2; .1–30.2)	0/16 (0.0; .0–20.6)	9/14 (64.3; 35.1–87.2)	14/15 (93.3; 59.6–86.1)
Occupation	P = .65	P = .04	P = .003	P < .001
Abattoir worker	6/41 (14.6; 5.5–29.2)	0/41 (0.00; .0–8.6)	28/33 (84.8; 68.1–94.9)	37/39 (94.9; 82.7–99.4)
Farmworker	0/10 (0.0; .0–30.8)	0/10 (0.0; .0–30.8)	4/9 (44.4; 13.7–78.8)	3/9 (33.3; 7.5–70.1)
Farmer	0/1 (0.0; .0–95.0)	0/1 (0.0; .0–95.0)	0/1 (0.0; .0–95.0)	0/1 (0.0; .0–95.0)
Laboratory worker	1/4 (25.0; .6–80.6)	0/4 (00.0; .0–60.2)	2/3 (66.7; 9.4–99.1)	4/4 (100.0; 39.8–100.0)
Researcher	0/2 (0.0; .0–84.2)	1/2 (50.0; 1.2–98.7)	0/1 (0.0; .0–95.0)	1/1 (100.0; 2.5–100.0)
Veterinarian or veterinary technician	1/8 (12.5; .3–52.6)	0/8 (0.0; .0–36.9)	3/8 (37.5; 8.5–75.5)	4/8 (50.0; 15.7–84.3)

Abbreviation: CI, confidence interval.

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