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Microbiology, 2021

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184 5 • The Eukaryotes of <strong>Microbiology</strong><br />

Figure 5.8<br />

CHECK YOUR UNDERSTANDING<br />

• Which supergroups contain the clinically significant protists?<br />

Amoebozoa<br />

The supergroup Amoebozoa includes protozoans that use amoeboid movement. Actin microfilaments produce<br />

pseudopodia, into which the remainder of the protoplasm flows, thereby moving the organism. The genus<br />

Entamoeba includes commensal or parasitic species, including the medically important E. histolytica, which is<br />

transmitted by cysts in feces and is the primary cause of amoebic dysentery. Another member of this group<br />

that is pathogenic to humans is Acanthamoeba, which can cause keratitis (corneal inflammation) and<br />

blindness. The notorious “brain eating amoeba,” Naegleria fowleri, is a considered a distant relative of the<br />

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