Figure 1From: Risk factors associated with within-herd transmission of bovine leukemia virus on dairy farms in JapanDistribution of BLV-infected farms classified by seroprevalence (n = 90). Seroprevalence on infected farms at the 25th, 50th (median), and 75th percentiles was 17.1%, 48.1%, and 68.5%, respectively. Visual inspection of this histogram and the Shapiro--Wilk test confirmed that seroprevalence was not normally distributed (p < 0.002).Back to article page