Fig. 2.

Acute stress increases the magnitude and extent of early leukocyte infiltration into a surgical sponge. Saline-treated gelatin sponges were s.c.-implanted and subsequently retrieved and processed for hematoxylin/eosin staining 6 h after implantation. Compared with NS animals, sponges from STR animals showed dense clusters of leukocytes at the interface between skin tissue and sponge, and a greater extent of infiltration into the adjacent sponge matrix. Arrows point to representative leukocyte clusters. (Scale bar, 100 μm.)