BIOPHOTO ASSOCIATES / SCIENCE PHOTO LIBRARY BIOPHOTO ASSOCIATES / SCIENCE PHOTO LIBRARY
Light micrograph showing hydatid cysts, an intermediate part of the cyclophyllid tapeworm life cycle (Echinococcus genus), magnification 250X. The cysts are bladder-like structures residing in the organs of intermediate host animals (usually sheep, wild herbivores or rodents, but also humans). If the intermediate host is eaten by carnivores, the worm completes its life cycle.
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