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. 2017 Apr 5;3:7. doi: 10.1186/s40813-017-0055-4

Table 1.

Pig batches included in the study with reported respiratory problems in previous batches

Source (expected severity of respiratory problems) A (low) B (medium) C (high)
Expected problems based on historical records. Source negative for PRRSV and M. hyo. Occasional problems with SIV. Source positive for PRRSV but negative for M. hyo. Previous batches presented SIV and Streptococcus suis disease. Source positive for PRRSV and M. hyo. Previous batches presented respiratory and Streptococcus suis disease.