Okayama/5/2000 A Chiba/1001/2009 2×105PUF 10 5 Inoculated with virus solely Inoculated with virus + mannan n=9×2 0 2×104PUF Surviving mice 10 2×104PUF 5 n=9×2 n=9×2 0 2×103PUF 10 2×103PUF 5 n=9×2 0 B n=9×2 5 0 10 15 0 Day after infection 5 15 Symptom score 20 0: No weight loss 1: Max. weight loss ≦10% 2: Max. weight loss 10 < ~ ≦ 20% 3: Max. weight loss > 20% 4: Died within 2 weeks n=27×2 15 Sum of mice 10 n=18×2 10 5 0 0 1 2 3 4 0 1 2 3 Symptom score Inoculated with virus solely Inoculated with virus + mannan 4
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