MAKE A MEME
View Large Image
| View Original: | Metagonimus_LifeCycle.gif (598x435) | |||
| Download: | Original | Medium | Small | Thumb |
| Courtesy of: | commons.wikimedia.org | More Like This | ||
| Keywords: Metagonimus LifeCycle.gif Adults release fully embryonated eggs each with a fully-developed miracidium and eggs are passed in the host ™s feces After ingestion by a suitable snail first intermediate host the eggs hatch and release miracidia which penetrate the snail ™s intestine Snails of the genus Semisulcospira are the most frequent intermediate host for Metagonimus yokogawai The miracidia undergo several developmental stages in the snail i e sporocysts rediae and cercariae Many cercariae are produced from each redia The cercariae are released from the snail and encyst as metacercariae in the tissues of a suitable fresh/brackish water fish second intermediate host The definitive host becomes infected by ingesting undercooked or salted fish containing metacercariae After ingestion the metacercariae excyst attach to the mucosa of the small intestine and mature into adults measuring 1 0 mm to 2 5 mm by 0 4 mm to 0 75 mm In addition to humans fish-eating mammals e g cats and dogs and birds can also be infected by M yokogawai PD-USGov Metagonimus yokogawai CDC lifecycles Life cycles of trematodes | ||||
