Uncertainty and sensitivity analyses. As a variable response in the Box-Bhenken design, the percentage of sick animals at the end of lactation, nursery, and fattening period were used. Therefore, three response surfaces were obtained (Supporting Information). The percentage of infected sows, R 0 and lethality are the parameters that have a significant effect on the percentage of sick animals at the edge of the nursery and fattening period. However, the probability of transmission of the disease during the lactation phase slightly affects during this production phase. Using the response surfaces obtained, the sensitivity was studied in all three phases of the pig breeding process (Supporting Information). The increase of infected piglets is very small (from −3‰ to 3‰) during the lactation phase in the range of values used for infected sows. However, in the nursery (from 1.5 to 5.9%) and fattening phase (from 0.5 to 5.77%), this increase is bigger using low versus high level of infected sows. During the rearing period (nursery and fattening), an increase of one point (1%) in the percentage of infected sows implied an increase between 3 and 6% of infected pigs. In the latter two cases, the value decreases as the percentage of infected sows increases (Supporting Information). In the case of the R 0 parameter, an increase of one unit implies similar variations in the percentage of sick ani- mals during the nursery (from 2.1 to 5.8%) and fattening phase (from 2.6 to 6.2%) in the range of studied values.However, in the lactation phase, this increase is practically nil (from 0.02 to −0.94%). In the case of variations in the lethality value, the increase in sick animals does not practically vary during the nursery (from −0.9 to 0.1%) and fattening period (from −0.7 to 0.1%) in the range of studied values. In the lactation phase, it increases as the lethality increases, but the variations are very small (from −1.2 to 1.3%).
Uncertainty and sensitivity analyses. As a variable response in the Box-Bhenken design, the percentage of sick animals at the end of lactation, nursery, and fattening period were used. Therefore, three response surfaces were obtained (Supporting Information). The percentage of infected sows, R 0 and lethality are the parameters that have a significant effect on the percentage of sick animals at the edge of the nursery and fattening period. However, the probability of transmission of the disease during the lactation phase slightly affects during this production phase. Using the response surfaces obtained, the sensitivity was studied in all three phases of the pig breeding process (Supporting Information). The increase of infected piglets is very small (from −3‰ to 3‰) during the lactation phase in the range of values used for infected sows. However, in the nursery (from 1.5 to 5.9%) and fattening phase (from 0.5 to 5.77%), this increase is bigger using low versus high level of infected sows. During the rearing period (nursery and fattening), an increase of one point (1%) in the percentage of infected sows implied an increase between 3 and 6% of infected pigs. In the latter two cases, the value decreases as the percentage of infected sows increases (Supporting Information). In the case of the R 0 parameter, an increase of one unit implies similar variations in the percentage of sick ani- mals during the nursery (from 2.1 to 5.8%) and fattening phase (from 2.6 to 6.2%) in the range of studied values.<br>However, in the lactation phase, this increase is practically nil (from 0.02 to −0.94%). In the case of variations in the lethality value, the increase in sick animals does not practically vary during the nursery (from −0.9 to 0.1%) and fattening period (from −0.7 to 0.1%) in the range of studied values. In the lactation phase, it increases as the lethality increases, but the variations are very small (from −1.2 to 1.3%).
正在翻译中..