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Dermatophilus congolensis: Smear preparation of a skin scraping showing the beaded appearance of the bacterium

The smear shows the presence of single strands of a Gram-posiive, filamentous, mycelial-like growth, caused by the budding of zoospores that impart a beaded appearance to the bacterial growth.  These filaments also divide laterally producing filaments with a number of rows of zoospores.

Nick Kriek