golfing eagles |
07-06-2017 07:43 AM |
Quote:
Originally Posted by graciegirl
(Post 1421218)
Not phylum, subphylum, class and order? I don't want to shame myself, so here is the towel. I don't do too bad for a high school graduate who is pretty close to 80.
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Since you threw in the towel, here's the answer: The intermediate host is a freshwater snail, Biornphalaria glabratta. . Eggs enter freshwater then find this snail, where the larva mature into shistosomes and are released into the water. The shistosomes enter humans through the skin, then migrate to the veins draining the large intestine (in the case of S. mansoni), where they are fruitful and multiply. The adults then lay eggs that get into the bowel and eventually water, completing the cycle.
Before you say this is a very obscure disease, the number of cases in the US is essentially zero, but worldwide it is the most common infection of man, with an estimated 3 billion+ infested. S. mansoni is common in the Caribbean. So for those who retreat there or go on a cruise in winter, enjoy the swimming pools, enjoy the ocean, but DO NOT, repeat DO NOT swim in any fresh water such as lakes or grottos. You might find yourself coming home with more than a suntan and a bottle of rum.
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