Cysts enter the mouth. Trophozoites are released from cysts. 1 µm' Cysts pass through the stomach to the 2 Trophozoites multiply in intestine. lower small intestine. Dehydration in large intestine stimulates 5 cyst development. Trophozoite Cyst Mature cysts or trophozoites are eliminated in the feces to contaminate soil, water, hands, and food. 10 um FIGURE 24.22 Life Cycle of Giardia lamblia

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