Table 4.

Percentage of isolated bacteria species in the total number of samples (n = 112) from PPDS-affected and non-affected sows

	percentage in samples (n = 54) from PPDS+ sows (%)	percentage in samples (n = 58) from PPDS- sows (%)	p-values
E. coli	38.9	44.8	0.13
Staph. aureus	14.8	10.3	0.18
Staph. hyicus	11.1	10.3	0.32
Staph. spp.*	29.6	15.5	0.04
Enterococcus spp.	33.3	31.0	0.16
Klebsiella spp.	3.7	0.0	0.23
others**	20.4	17.2	0.18

significant effects (≤ 0.05) in bold

* all Staph. species but Staph. aureus and Staph. hyicus

** Aerococcus spp., Enterobacter spp., Escherichia spp., Lactobacillus spp., Leuconostoc spp., Raoultella spp., Streptococcus spp.