Fig. 2

Virological data during the postchallenge period. Detection of the PRRSV Finistere strain genome by qRT–PCR for each inoculated (a) or contact (b) pig in serum and tonsils. Grey areas: positive detection; White areas: negative detection. Quantification of PRRSV Finistere strain genome load by qRT–PCR in serum (c) and BAL fluid (d) collected from inoculated and infected pigs (mean + SD; 8 pigs per group for V+ ID and V- groups and 7 pigs for V+ IM group for serum, 6 pigs per group for V+ ID and V- groups and 5 pigs for V+ IM group for BAL fluid). Red star indicates where the V+ ID group is significantly different from the V- group, and blue star indicates where the V+ IM group is significantly different from the V- group. For the histograms, different letters above the bars indicate that the groups are significantly different from each other with p < 0.05