Table II.

Macroscopic lesion in tissues of budgerigars, 3 weeks post Cp. psittaci challenge. The scores for the macroscopic lesions of different tissues in vaccinated and placebo-vaccinated birds were compared. The median plus 25 and 75 percentiles and the level of significance with the Mann–Whitney U test is shown for each tissue. p values are indicated in the last column as follows: * p < 0.05; ** p < 0.01; *** p < 0.001 and ns for non significant. The scores were significantly different for all tissues except conchae, spleen and kidney.