A single recall vaccination lapse in sows triggers PRRSV resurgence and boosts viral genetic diversity

Table 1 Data summary for each batch. The table shows the data of the monitored animals, vertical transmission frequency, and cumulative incidences at three, six, and nine weeks of age for each followed batch

Batch	Nº litters	Range of sows’ parities	Pigs followed (1–9 woa)	Litters with PRRS-positive piglets at birth	Incidence at 3 woa	Incidence at 6 woa	Incidence at 9 woa
1	44	1–9	170	1 (2.3%) ^a (CI_95%: 0.1–13.5%)	6.5% ^a	19.9% ^b	60.8% ^b
2	42	1–9	173	3 (7.1%) ^a (CI_95%: 1.9–20.6%)	4.1% ^a	6.1% ^c	20.9% ^c
3	65	1–8	192	3 (4.6%) ^a (CI_95%: 1.2–13.6%)	7.3% ^a	98.8% ^a	100.0% ^a
Totals/ Average	151	1–9	535	4.6%	N.A.	N.A.	N.A.

woa = weeks of age. N.A. non-applicable. Values with a different superscript letter indicate significant differences (p < 0.05)

ISSN: 2055-5660