Antibody responses to porcine reproductive and respiratory syndrome virus, influenza A virus, and Mycoplasma hyopneumoniae from weaning to the end of the finisher stage in fourteen groups of pigs in Ontario, Canada

Table 1 Pig-level seropositivity to PRRSV, IAV, and M. hyopneumoniae in 14 groups of pigs

		% of pigs testing seropositive at least once
		Farrowing source
	Cohort	1	2	3	4	5	6	7	8
PRRSV	One	0.0	0.0	0.0	0.0	8.3	38.3	0.0	0.0
PRRSV	Two	1.7	ND	0.0	0.0	0.0	0.0	ND	65.0
IAV	One	35.2	17.2	33.3	3.3	11.7	13.3	60.0	70.0
IAV	Two	5.0	ND	68.3	51.7	68.3	63.3	ND	70.0
M. hyo	One	^a72.2	8.6	0.0	1.7	85.0	1.7	48.3	11.7
M. hyo	Two	^a25.0	ND	1.7	0.0	66.7	1.7	ND	26.7

This table depicts the percentage of individual pigs that were seropositive for porcine reproductive and respiratory syndrome virus (PRRSV), influenza A virus (IAV), or Mycoplasma hyopneumoniae at least once in 14 groups of pigs from 8 farrowing sources. A group was considered seropositive if more than 20% of pigs were seropositive at least once from the end of nursery to the end of the finisher stage
ND No data (blood samples were not collected)
^a Vaccinated for M. hyopneumoniae

ISSN: 1746-6148