Volume 17, Number 12—December 2011
Proximity to Goat Farms and Coxiella burnetii Seroprevalence among Pregnant Women
|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)|
|No. infected farms within 5 km|
|Total no. locations with sheep or goats within 5 km|
|Address density of neighborhood, addresses/km2‡|
|<500||1.85 (1.23–2.78)||1.32 (0.65–2.70)|
*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.