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In vitro developmental stages of Echinococcus granulosus in Biphasic (A–F) and monophasic (G) culture media. (A) Intact protoscolex. (B) Evaginated protoscolex. (C) Excretory canals and bladder formation. (D) First proglottid formation. (E) Second proglottid formation. (F) Third or more proglottid formation. (G) Microcyst cultivated in vitro.
