The life cycle of parasitic nematodes is clinically important. Some nematode infections can be transmitted directly from infected to Occasionally, the migration of the parasite produces ectopic disease (eg, [Best Evidence] Keiser J, Utzinger J. Efficacy of current drugs against soil-transmitted helminth infections:
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emedicine.medscape.com/article/224011-overview
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The diagram gives the life cycle of the blood fluke, Schistosoma mansoni. Once within the alternate host, a snail, a single miracidium may produce as many as 200,000 infectious cercariae. Both sexes must infect the human if the cycle is to continue.
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users.rcn.com/jkimball.ma.ultranet/BiologyPages/I/Inver...
users.rcn.com/jkimball.ma.ultranet/BiologyPages/I/Invertebrates.html
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The propensity of helminth parasites to induce polarized Th2 responses is When migration is a feature of the helminth life cycle, Th2-dominated immunity...
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linkinghub.elsevier.com/retrieve/pii/S1471492205000966
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2. The epidemiology of helminth parasites ..... The life cycle is unusual for flukes in that this parasite does not require an aquatic environment at any...
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www.fao.org/wairdocs/ILRI/x5492E/x5492e04.htm
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Their life cycle is characterized by a series of remarkable morphological and biochemical transitions between an invertebrate host, an aquatic environment, and a mammalian host. We report a global transcriptional analysis of how this parasite alters gene regulation to adapt to three distinct environments.
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genomebiology.com/2007/8/4/R65/abstract
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We suggest that complex cycles in helminths without penetrative infective stages evolve by two essentially different processes, depending on where in the cycle a new host is inserted. Advantages to the parasite are avoidance of mortality due to the predator, greater body size at maturity and higher fecundity.
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www.nature.com/nature/journal/v425/n6957/full/nature020...
www.nature.com/nature/journal/v425/n6957/full/nature02012.html
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compare the helminth parasite communities of trout at different stages of their life cycle at several sites in the west of Ireland. MATERIALS AND METHODS...
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www.jstor.org/stable/20499893
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No routine laboratory techniques were developed so far for culturing schistosomes through their complete life cycle in vitro as well as for expressing transgenes for targeted gene silencing and other purposes. at this time, the infection of the final host is complete and sexual reproduction of the parasite begins...
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www.metapathogen.com/schistosoma/
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Enterobius vermicularis (originally Oxyuris vermicularis) is a small parasitic nematode, probably, most common helminth parasite in human.
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www.metapathogen.com/enterobius/
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