Exploring Appropriate Strategies for Vaccination against Classical Swine Fever under a Dynamic Change in Antibody Titer in Sows after Starting Vaccination in a Japanese Farm Setting

Figure 7

Distributions of S/P ratios of sow herds with (a) an annual sow replacement rate of 60%, (b) replacement rate of 60% and preferential culling of sows with an S/P ratio > 0.95, and (c) a replacement rate of 60%, preferential culling of sows with an S/P ratio > 0.95, and selection of candidates with 0.1 < S/P ratio < 0.95 in 0.5-year increments after the start of vaccination.

(a)

(b)

(c)