Figure 3

(legend to color Figure). (a) Section of lung with intense peribronchial inflammation of one animal of group A-controls that died 1.5 days after bacterial challenge and; (b) showing very mild interstitial inflammation of one animal of group B-administered clarithromycin that died 2 days after bacterial challenge. (c) Section of spleen with intense activation of B- and T-lymphocyte dependent areas of one animal of group A-controls that died 3 days after bacterial challenge and; (d) showing moderate activation of these areas of one animal of group B-administered clarithromycin that died 3.5 days after bacterial challenge.