01:146:328 Lecture Notes - Lecture 5: Clonorchis Sinensis, Fasciola Hepatica, Paragonimus
14 Oct 2020
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Egg: morphology, operculum (not all spp, looks like a little lid that pops open, this is how the miracidium inside exits the egg, clonorchis sinensis, paragonimus westermani, fasciola hepatica, exceptions: not in schistosomes (1) knobs and spines. September 14, 2020: development: eggs being produced by the adult worms in the dh, they leave the. Trematode eggs host: exits host, typically, eggs exit the host embryonated a) It would be disadvantageous if the egg were to hatch inside the host. Miracidium will not develop until it exits the host: hatching stimuli (different from host conditions) (1) light (2) temperature (3) ph (4) osmolarity. September 14, 2020: 100 m, non-feeding, characterized by cilia, cephalic ganglion, kind of like a brain, but not really. This is where chemoreceptors, photoreceptors, and georeceptors come into play. There is evidence that the miracidium will respond to these positive and negative cues in the manner that their snail host would respond to those cues.
