Volume 17, Number 12—December 2011
Dispatch
Proximity to Goat Farms and Coxiella burnetii Seroprevalence among Pregnant Women
Table 2
Multivariate logistic regression models for Coxiella burnetii IgG II seropositivity and serologic indication for possible recent infection based on house location of 2,004 pregnant women, the Netherlands, 2007–2009*
Variable | OR (95% CI) |
|
---|---|---|
IgG II titer >64 | Possible recent infection† | |
Distance to nearest farm with clinical Q fever, km | ||
<2.0 | 2.38 (1.19–4.73) | 6.68 (2.53–17.64) |
2.0–4.9 | 1.12 (0.74–1.71) | 2.82 (1.34–5.92) |
>5 | Reference | Reference |
No. infected farms within 5 km | ||
>1 | 0.92 (0.46–1.85) | |
0 | Reference | |
Total no. locations with sheep or goats within 5 km | ||
>140 | 1.29 (0.95–1.76) | |
<140 | Reference | |
Address density of neighborhood, addresses/km2‡ | ||
<500 | 1.85 (1.23–2.78) | 1.32 (0.65–2.70) |
>500 | Reference | Reference |
*OR, odds ratio; CI, confidence interval. Blank cells indicate variable not included.
†IgM antibody titer to phase II antigen >64 combined with either an IgG II or IgM I titer >64.
‡Neighborhoods were categorized as not urban if the address density was <500 addresses/km2 and urban if >500/km2.