In all seven pigs of the control group with observed
pathological lesions, A. pleuropneumoniae was isolated from
the lungs and in two pigs also from the tracheobronchial
lymph node. In five pigs from the garlic-fed group, A.
pleuropneumoniae was isolated from lung tissue and in one
case also from the tracheobronchial lymph node. In three of
these cases, lungs showed the typical fibrino-necrotic
pneumonia. However, A. pleuropneumoniae was also isolated
from two lungs without characteristic lesions, i.e. the
lungs with either a catarrhal pneumonia or with reduced
lung retraction; in one lung with a characteristic fibrinous
pleuritis (without pneumonia), the bacterium was not
isolated.