This flagellate is pear-shaped with "falling leaf" motility.It contains variant-specific surface proteins (VSPs)on its surface, which provide a mechanism for the organism to survive in the small intestine as a result of its ability to resist intestinal proteases.The organism is:

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The VSPs are a family of related, highly unusual proteins covering the surface of the organism.The VSPs are resistant to the effects of intestinal proteases, thus allowing the parasites to survive in the protease-rich small intestine.An antigenic variation of the surface antigen during human infections with G.lamblia has been documented.

This Flagellate Is Pear-Shaped with "Falling Leaf" Motility