in this study, 60 female, new zealand white rabbits were chosen and divided into 3 groups . the animals in group 1&2 were immunosuppressed with dexamethazone and cyclosporin a (cya) respectively. the animals in group 3 (control animals) were not immunosuppressed. in each group, half of the rabbits were infected intratracheally and the other half were infected intravenously with 4 conidia of asp...