Characterization of CPV/49 pathology in murine heart and pancreas. Groups of 5 C3H/HeJ male mice were inoculated i.p. with 5 × 105 TCID50 of either CPV/49 or CVB3/20 and then sacrificed 10 days p.i. Control mice were inoculated with unsupplemented medium used to dilute viruses. Hearts and pancreata were harvested 10 days later, fixed in formalin, embedded and sectioned, and then stained with hemotoxylin and eosin. Shown are heart (a) and pancreas (b) from a mouse inoculated with CPV/49, heart (c) and pancreas (d) from a control uninfected mouse and heart (e) and pancreas (f) from a mouse inoculated with CVB3/20. Original magnification, ×100.