Results from assays for virus detection and virus quantification, and tracheal histopathological examination in birds directly vaccinated with different ILTV vaccines, four days after challenge

a,b,c Values marked with the same superscripts in the same column were not significantly different (p > 0.05).¶ S.D = standard deviation. The lower limit of detection of the assay used to detect and quantify viral genome was 52, or 101.72, genome copies per reaction..