Respiratory syncytial virus

An H&E stain shows hyperplastic type II cells, one of which has a pink cytoplasmic inclusion (arrow) of RSV. An immunoperoxidase stain for RSV also stained the inclusions.

A Giemsa stain shows more contrast between the pink inclusion and the rest of the cytoplasm (arrow).


CMV usually infects epithelial cells. The infected cells are larger than uninfected, hyperplastic type II cells and have both nuclear (owl's eye) and cytoplasmic blue inclusions (arrow shows one infected cell).