a close up of a red and blue flower

Created by Centers for Disease Control and Prevention’s (CDC) biomedical photographer, James Gathany, under a magnification of 100X, this photomicrograph revealed the histopathologic morphology associated with the agriculturally-related condition known as wheat rust, caused by the fungal organism, Puccinia rust fungus, or Puccinia graminis, as it invaded the cuticle of a wheat stalk.