Volume 11, Number 11—November 2005
West Nile Virus Epidemic, Northeast Ohio, 2002
|Seroprevalence||No. positive/no. tested||Weighted % (95% CI)|
|5–17 y||4/168||6.5 (4.3–9.5)|
|18–64 y||25/790||1.3 (0.4–4.5)†|
|>65 y||5/219||1.4 (0.4–4.5)‡|
|More human illnesses reported; higher MIR(stratum 1)§¶||16/463||2.5 (0.6–9.2)|
|Fewer human illnesses reported; varying MIR (stratum 2)#||7/453||1.5 (0.2–4.4)|
|No human illnesses reported; varying MIR (stratum 3)**||11/293||3.3 (0.4–23.9)|
*WNV, West Nile virus; CI, confidence interval; MIR, minimum infection rate.
†Significant difference between 5- to 17-year-old and 18- to 64-year-old patients (p<0.02).
‡Significant difference between 5- to 17-year-old and >65-year-old patients (p<0.01).
¶Stratum 1 included neighborhoods with at least 9 reported human cases, a WNV case rate >4.5/10,000, and mosquito MIR >15/1,000.
#Stratum 2 included neighborhoods with at least 1 reported human case, a WNV case rate <4.5/10,000, and varying levels of MIR (0–54/1,000).
**Stratum 3 included neighborhoods with no known human cases and varying levels of MIR.
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