Kinetics of the porcine reproductive and respiratory syndrome virus (PRRSV) humoral immune response in swine serum and oral fluids collected from individual boars

Table 2 Porcine reproductive and respiratory syndrome virus (PRRSV) serum ^a and oral fluid ^b ELISA qualitative results ^c by day post inoculation (DPI)

Trial (virus isolate)	Sample	DPI 0 positive / tested	DPI 7 positive / tested	DPI 14 positive / tested	DPI 21 positive / tested
Trial 1: (Ingelvac® PRRS MLV)	Oral fluid	0 / 24	0 / 24	24 / 24	24 / 24
Trial 1: (Ingelvac® PRRS MLV)	Serum	0 / 24	0 / 24	24 / 24	24 / 24
Trial 2: (Type 1, D09-012332)	Oral fluid	0 / 22	0 / 22	17 / 21	22 / 22
Trial 2: (Type 1, D09-012332)	Serum	0 / 24	0 / 24	22 / 24	24 / 24
Trial 3: (Type 2, MN-184)	Oral fluid	0 / 24	0 / 23	24 / 24	22 / 22
Trial 3: (Type 2, MN-184)	Serum	0 / 24	0 / 24	24 / 24	24 / 24
Total	Oral fluid	0 / 70	0 / 69	65 / 69	68 / 68
Total	Serum	0 / 72	0 / 72	70 / 72	72 / 72

^a PRRS X3 Ab Test (IDEXX Laboratories, Inc, Westbrook, Maine, USA) performed according to the manufacturer’s instruction.
^b PRRS X3 Ab Test (IDEXX Laboratories, Inc, Westbrook, Maine, USA) modified to detect anti-PRRSV antibody in oral fluid specimens [5].
^c Samples with S/P ratio ≥ 0.4 were classified as positive.

ISSN: 1746-6148