Figure 4

Annual infection probability of the three pathogens in SW (A) and SRW (B). (A) n = 5000. (B) n = 3. The exposure routes were dermal exposure of P. aeruginosa and oral intake of M. avium and Salmonella sp.; **** means extremely significant difference and ns means no significant difference by t-test between the two pathogens (p < 0.0001). * means significant difference by t-test between SRW and SW (p < 0.05). Dash line means the risk threshold 1 × 10−4.