Wet mount of columnaris, skin of a Corydoras catfish
Photomicrograph of skin from a Corydoras catfish showing haystacks of Flavobacterium columnare. Closer examination of the haystacks shows numerous filamentous, motile bacteria. All of the golden-brown material in this image is bacteria. Unstained wet mount, original magnification, 100×.
Courtesy of Dr. Denise Petty.
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