Fig. 2

Histology of the white patella QU-1. A, photograph of the patella QU-1 with the red line indicating the direction of the section; B, histological cross section of QU-1 under transmitted light and its close-up (C) and (D), showing the bacterial colonies; E, SEM image of the section slice indicated by the box in B and its close-up (F), showing the bacterial colonies and decrease of bone matrix density. The white patella is heavily attacked by bacterial invasions. Slide is 94 micron thickness. bc, bacterial colony; cl, clay; oc, osteocyte; ol, osteocyte lacuna; tb, trabecula; ub, unaltered bone.