Cryptosporidium parvum – Oocysts on stool smear (modified Ziehl–Neelsen stain)

France, CHU Dijon Parasitologie-Mycologie

Oocysts of Cryptosporidium parvum stain red, and are readily visible on the green background of stool smear. In the lower right quadrant, spores of Geotrichum sp. do not stain.