Table 2

Percentage and number (in parentheses) of sows with a M. hyopneumoniae nested-PCR-positive laryngeal swab

Herd A
abcdP valuea–c (NV)b–d (V)P* value
12–24 hours post-farrowing0.0 (0/5)0.0 (0/5)20.0 (1/5)0.0 (0/5)0.99910.0 (1/10)0.0 (0/10)0.999
Herd B
abcdP valuea–c (NV)b–d (V)P* value
12–24 hours post-farrowing0.0 (0/5)40.0 (2/5)40.0 (2/5)20.0 (1/5)0.90220.0 (2/10)30.0 (3/10)0.608
  • Vaccination status: NV (non-vaccinated sow batches) and V (vaccinated sow batches). The P value refers to the comparisons between the individual sow batches, and the P* value to the comparisons between the summaries of the NV (a–c) and V (b–d) batches. Differences between batches were not statistically significant (P>0.05).