Fig 4. MMP-9 expression in M. mycetomatis (A), S. somaliensis (B) and A. pelletieri (C).

Stromal expression (i.e. connective tissue parenchymal) of MMP-9 was negative in all the areas which contained thick bundles of collagen fibers (arrow head) (X 10). This figure is composed of representative pictures from single patients. Differences among individual patients were noted, however we chose pictures which correlated with the majority of each group of patients.