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Group II (Azithromycin Treatment): A light microscope looks at heart ventricle tissue reveals a lot of myofiber disorganization, with gaps between fibers that can be seen, as well as areas of inflammation and bleeding. These findings indicate marked degeneration due to azithromycin administration. We used Hematoxylin and Eosin (H&E) staining at a 400x magnification.
