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Table 3 Results of virus isolation from serum samples of vaccinated pigs in MARC-145 and PAM cultures.

From: Safety of Porcine Reproductive and Respiratory Syndrome Modified Live Virus (MLV) vaccine strains in a young pig infection model

Days post-vaccination Virus isolation on Marc-145 Virus isolation on PAM
Group Group
A B C D A B C D
0 0/15 (0) a 0/15 (0) 0/15 (0) 0/15 (0) 0/15 (0) 0/15 (0) 0/15 (0) 0/15 (0)
3 12/15 (80) 14/15 (93.3) 0/15 (0) 0/15 (0) 0/15 (0) 0/15 (0) 0/15 (0) 0/15 (0)
6 15/15 (100) 14/15 (93.3) 14/15 (93.3) 11/15 (73.3) 0/15 (0) 0/15 (0) 0/15 (0) 0/15 (0)
7 5/5 (100) 5/5 (100) 5/5 (100) 3/5 (60) 0/5 (0) 0/5 (0) 0/5 (0) 0/5 (0)
9 10/10 (100) 8/10 (80) 6/10 (60) 8/10 (80) 0/10 (0) 0/10 (0) 0/10 (0) 0/10 (0)
12 10/10 (100) 8/10 (80) 9/10 (90) 8/10 (80) 1/10 (10) 3/10 (30) 0/10 (0) 0/10 (0)
14 5/5 (100) 4/5 (80) 3/5 (60) 4/5 (80) 1/5 (20) 1/5 (20) 0/5 (0) 0/5 (0)
15 5/5 (100) 5/5 (100) 3/5 (60) 3/5 (60) 0/5 (0) 0/5 (0) 0/5 (0) 0/5 (0)
18 5/5 (100) 4/5 (80) 4/5 (80) 4/5 (80) 0/5 (0) 1/5 (20) 0/5 (0) 0/5 (0)
21 5/5 (100) 4/5 (80) 4/5 (80) 2/5 (40) 1/5 (20) 0/5 (0) 0/5 (0) 0/5 (0)
  1. a Number of positive samples/Number samples tested (Percentage of positive samples).