<i >Cryptosporidium parvum</i> oocysts, fecal smear, photomicrograph, calf

Cryptosporidium parvum oocysts, fecal smear, photomicrograph, calf

Photomicrograph of a fecal smear from a neonatal Holstein calf with diarrhea, showing Cryptosporidium parvum oocysts (red spherules). Ziehl-Neelsen stain; scale bar = 10 mcm.

Courtesy of Dr. William Harold Witola.