BIOMI 3310 Lecture Notes - Lecture 15: Vespula, Phototaxis, Arthropod
19 Apr 2018
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Adenophorea: class of nematodes: differ from secernentea, no tail - have a terminal anus, l1 is often the infective stage. Three major groups: trichinelloidea: associated with epithelia, characteristic stichosome esophagus. Trichinella species are infective as immature first-stage larvae (prelarvae: trichuris spp. : whipworms: adults in cecum and colon of mammals, anterior end is in the mucosa, posterior end is in the lumen. Infected by ingesting an egg with an l1: capillarids: entire body of the parasite is threaded within the epithelial mucosa of vertebrates. Larvae produced by the female go to the muscle (instead of leaving in feces) Final host becomes the next intermediate host: dioctophymatoidea: adults in lumen of intestine or urinary tract (kidney, muscular, cylindrical esophagus similar to that of secernentea nematodes, dioctophyma: giant kidney worm. L3 is infective to final host: egg in urine. Intermediate hosts: small invertebrates (ex. oligochaetes) that move into things like frogs: dioctophyme renale:
