Table 2.
Summary of viral viability by ingredient type according to swine bioassay
| Conventional soya bean meal | Organic soya bean meal | Lysine | Choline | Vitamin A | |
|---|---|---|---|---|---|
| PRRSV | 4 of 4 pigs (+) a | 3 of 4 pigs (+) | 0 of 4 pigs (+) | 0 of 4 pigs (+) | 0 of 4 pigs (+) |
| PEDV | 3 of 4 pigs (+) | 3 of 4 pigs (+) | 0 of 4 pigs (+) | 0 of 4 pigs (+) | 0 of 4 pigs (+) |
| SVA | 4 of 4 pigs (+) | 4 of 4 pigs (+) | 4 of 4 pigs (+) | 0 of 4 pigs (+) | 3 of 4 pigs (+) |
| (+) controls b | 0 of 2 pigs (+) | 0 of 2 pigs (+) | 0 of 2 pigs (+) | 0 of 2 pigs (+) | 0 of 2 pigs (+) |
| (−) controls c | 0 of 3 pigs (+) | 0 of 3 pigs (+) | 0 of 3 pigs (+) | 0 of 3 pigs (+) | 0 of 3 pigs (+) |
a
A determination of (+) was based on a positive PCR test from a blood sample (PRRSV or SVA) or a positive PCR test from a rectal swab (PEDV or SVA) following inoculation with a designated feed ingredient.
b
Positive control pigs were inoculated with a stock virus mix of PEDV, PRRSV and SVA (no feed matrix) following conclusion of the transport period.
c
Negative control pigs were inoculated with conventional soya bean meal (no virus) following conclusion of the transport period.