PTPRC and infection: Photomicrographs reepresentative for four independent experiments illustrate (A) apoptotic colonic epithelial cells (Casp3+), (B) proliferating colonic epithelial cells, large intestinal (C) macrophages and monocytes (F4/80+), (D) T lymphocytes (CD3+), (E) B lymphocytes (B220+) and furthermore, (F) hepatic and (G) renal T lymphocytes (CD3+) in at least six high power fields (HPF) as quantitatively assessed in respective paraffin sections applying in situ immunohistochemistry at day 6 post-infection (100× magnification, scale bar 100 μm).