a8544e74d90e42f02b305fe35b8822a1

Chytridiomycosis. Ventral skin of upper hind limb of Atelopus varius from western Panama. Two sporangia (spore-containing bodies of Batrachochytrium sp.) containing numerous zoospores are visible within cells of the stratum corneum. Each flask-shaped sporangium has a single characteristic discharge tube (arrow) at the skin surface. Exiting zoospores are visible in the discharge tubes of both sporangia. Hyperkeratosis is minimal in this acute infection. Tissues were fixed in neutral-buffered 10% formalin, paraffin-embedded, sectioned at 6 µm thick and stained with hematoxylin and eosin. Bar = 35 µm.