Volume 12, Number 6—June 2006
Dispatch
Preventing Zoonotic Influenza Virus Infection
Alejandro Ramirez*†
, Ana W. Capuano*, Debbie A. Wellman*, Kelly A. Lesher*, Sharon F. Setterquist*, and Gregory C. Gray*
, Ana W. Capuano*, Debbie A. Wellman*, Kelly A. Lesher*, Sharon F. Setterquist*, and Gregory C. Gray*Table 1
Characteristics of swine workers and controls, Iowa, 2004–2005
| Variable | Total | Study sample, n (%) |
||
|---|---|---|---|---|
| Swine workers (n = 49) | Controls (n = 79)* | |||
| Age group (y) | ||||
| <29 | 46 | 15 (30.6) | 31 (39.2) | |
| 29–42 | 40 | 12 (24.5) | 28 (35.4) | |
| >42 | 42 | 22 (44.9) | 20 (25.3) | |
| Mean age (y) | 40.3 | 35.3 | ||
| Sex† | ||||
| Male | 63 | 37 (75.5) | 26 (32.9) | |
| Female | 65 | 12 (24.5) | 53 (67.1) | |
| Race† | ||||
| American Indian/Alaska Native | 1 | 0 | 1 (1.3) | |
| Asian | 2 | 1 (2) | 1 (1.3) | |
| African American | 18 | 0 | 18 (22.8) | |
| Native Hawaiian/Other Pacific Islander | 2 | 0 | 2 (2.5) | |
| White | 105 | 48 (98) | 57 (72.2) | |
| Ethnicity† | ||||
| Hispanic/Latino | 12 | 10 (21.7) | 2 (2.5) | |
| Non-Hispanic/Latino | 113 | 36 (78.3) | 77 (97.5) | |
| Served in military | ||||
| Yes | 12 | 5 (10.4) | 7 (8.9) | |
| No | 115 | 43 (89.6) | 72 (91.1) | |
| Take medications that weaken immune system | ||||
| Yes | 3 | 2 (4.2) | 1 (1.3) | |
| No | 122 | 44 (91.7) | 78 (98.7) | |
| Do not know | 2 | 2 (4.2) | 0 (0) | |
| Have heart or vascular disease | ||||
| Yes | 3 | 2 (4.2) | 1 (1.3) | |
| No | 124 | 46 (95.8) | 78 (98.7) | |
| Have any chronic lung problems such as asthma or emphysema | ||||
| Yes | 5 | 2 (4.2) | 3 (3.8) | |
| No | 122 | 46 (95.8) | 76 (96.2) | |
| Received the 2001–02 influenza vaccine | ||||
| Yes | 37 | 6 (12.5) | 31 (39.2) | |
| No | 90 | 42 (87.5) | 48 (60.8) | |
| Received the 2002–03 influenza vaccine† | ||||
| Yes | 36 | 5 (10.4) | 31 (39.2) | |
| No | 91 | 43 (89.6) | 48 (60.8) | |
| Received the 2003–04 influenza vaccine† | ||||
| Yes | 43 | 8 (16.7) | 35 (44.3) | |
| No | 84 | 40 (83.3) | 44 (55.7) | |
| Received the 1976–77 influenza vaccine† | ||||
| Yes | 2 | 1 (2.1) | 1 (1.3) | |
| No | 119 | 41 (85.4) | 78 (98.7) | |
| Do not know | 6 | 6 (12.5) | 0 | |
| Smoked >5 packs of cigarettes in past year† | ||||
| Yes | 14 | 9 (18.4) | 5 (6.3) | |
| No | 114 | 40 (81.6) | 74 (93.7) | |
*Not exposed to swine.
†Significantly different than controls at α = 0.05.
