01:146:328 Lecture Notes - Lecture 4: Digenea, Paragonimus, Southeast Asia
27 Nov 2016
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Document Summary
Foodborne diseases (fbd, conditions that are commonly transmitted through ingested food, enteric pathogens (like bacteria, viruses) Can also be caused by chemical contaminants like lead, and biotoxins i: also caused by parasites, food borne trematode infections. Fasciola i: clonorchis, opisthorchis, paragonimus (1) these four primarily infect east and southeast asia, and central and south america (2) 40 million people infected (3) resulted in 665,000 daly"s per year, trematodes, trematodes are animals, phylum platyhelminths. Adult worm is found in the dh, these worms lay eggs, the eggs come out of the host and shed into external environment , in the water they hatch and the stage that comes out is the miracidium. They swim until they find the appropriate snail host (ih). Inside the snail, the parasite undergoes asexual development, leading to a stage called sporoza redia . Now in some cases, that parasite will penetrate the dh to develop.
