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. 2002 Aug;8(8):777–782. doi: 10.3201/eid0808.010486

Table 2. Immunoglobulin G anti-West Nile virus prevalence in equines by breed, Camargue, France, 2000a.

Breed class Total Positive (%) Prevalence Ratio 95% CI
Pure breeds 1,252 108 (8.6) 1.2 0.9 to 1.7
Camargue 1,743 183 (10.5) 1.5 1.2 to1.9
Ponies 497 38 (7.6) 1.0 0.7 to1.5
Other 1,375 100 (7.3) Ref.
Total 4,867 429 (8.8)

aChi square=11.12 (3 degrees of freedom), p=0.01; 95% CI = 95% confidence intervals.