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ON THE COVER:

Microscopic image of a cleistothecium formed during in vitro mating of two Blastomyces dermatitidis isolates. Cleistothecia are the coil-like sexual structures formed when the two mating types of the Blastomyces fungus join.

Image courtesy of Kurt D. Reed, MD. Image by Kurt D. Reed, MD and Danielle Maruska. Text by Kurt D. Reed, MD and Jennifer L. Anderson, BS. All Rights Reserved.

See related article:

“Non-Rural Point Source Blastomycosis Outbreak Near a Yard Waste Collection Site” pp.57–65.