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. Author manuscript; available in PMC: 2008 Nov 5.
Published in final edited form as: J Parasitol. 2004 Oct;90(5):980–990. doi: 10.1645/GE-231R

Figure 3.

Figure 3

Transmission electron microscopy of sporozoites adhered to MDBK cells. Cryptosporidium parvum sporozoites were incubated with MDBK cells. A. Ten-minute incubation (arrows denote bound sporozoites), ×13,200. B. Thirty-minute incubation. Note firm adhesion with host cell and beginning development of an electron-dense layer (arrow), ×32,000. C. Sixty-minute incubation. Note enlarged anterior invagination (long arrow) and beginning development of an electron-dense collar (short arrows). Also note extension of host plasma membrane surrounding bound sporozoite (arrowhead), ×100,000.