Figure 3

Effect of a PRRSV infection on semen quality. Eleven boars were examined −4 and 4 weeks post-infection (wpi) on the percentage of morphologically intact spermatozoa (A), on the percentage of acrosome-defective spermatozoa (B), on the percentage of membrane-intact spermatozoa (C), on the percentage of circular, progressively motile spermatozoa (D), on the percentage of non-linear, progressively motile spermatozoa (E), and on the amplitude of lateral sperm head displacement (F). The differences between −4 and 4 wpi were significant (A: P = 0.037; B: P = 0.012; C: P = 0.021; D: P = 0.013; E: P = 0.01; F: P = 0.047) and are referred to by different, lower-case letters (a, b).