Fig. 2From: Serological survey of canine parvovirus 2 antibody titres in breeding kennels in northern ItalyComparison of antibody titres among different categories of time elapsed since last vaccination (Categories: < 12 months; 13–24 months; 25–36 months; 37–48 months; and > 49 months). (* = P < 0.05; ** = P < 0.01; and *** = P < 0.001)Back to article page