Specimen: Knee Aspirate

• Stain: Gram Stain

• Magnification: x1000

• Filamentous (> 1 µm) vacuolated, hollow and unstained fungal elements

• Note: Nocardia is gram positive branching bacilli < 1 µm.

• Structures shown on the image are unstained.

• Colloidal material present in the specimen has prevented the dye to reach the target site