Fig. 6
From: Pneumococcal colonization and invasive disease studied in a porcine model
Histological findings in joints of piglets inoculated with S. pneumoniae. Panels a and b were obtained from synovial membranes (SY) of piglets inoculated intravenously with a high dose. Panel a: in joints with synovia hypersecretion typically few, small inflammatory foci with perivascular mononuclear cells (arrow) were seen in the subsynovial tissue (SST); Panel b: serofibrinous arthritis with disruption of the synovial membrane (SY) and extended inflammation of the subsynovial tissue (arrow) and the connective tissue (CT) of the joint capsule