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Figure 2: (a and b) H and E stain shows a central abscess cavity containing actinomycotic colonies (black arrows) walled off by inflammatory infiltrate (yellow star) and thick fibrous capsule (black star); (c) High power view to show the Actinomyeces colonies composed of branched networks of rod-shaped bacterial filaments and peripheral intensely eosinophilic Splendore-Hoeppli phenomenon (yellow arrows); (d) Gram stain demonstrates positive staining of the bacterial colonies with more intense staining at the periphery (white arrows)

Figure 2: (a and b) H and E stain shows a central abscess cavity containing actinomycotic colonies (black arrows) walled off by inflammatory infiltrate (yellow star) and thick fibrous capsule (black star); (c) High power view to show the <i>Actinomyeces</i> colonies composed of branched networks of rod-shaped bacterial filaments and peripheral intensely eosinophilic Splendore-Hoeppli phenomenon (yellow arrows); (d) Gram stain demonstrates positive staining of the bacterial colonies with more intense staining at the periphery (white arrows)