GIARDIA LAMBLIA

Photomicrograph of a Giardia intestinalis cyst visualized using an Iodine stain. Giardia lamblia, the parasite causing giardiasis, lives in two stages: trophozoites and cysts. Trophozoites are an active form of the parasite inside the body. Cysts represent a resting stage that enables the parasite to survive outside the body.