Week12_Trematodes2_transcript - This is lecture number 2 and this is the second part of Trematodes Slide 1 Lecture 2 Emerging Parasitic Helminths part

Week12_Trematodes2_transcript - This is lecture number 2...

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Slide 1 Emerging Infectious Diseases PHC4031 Lecture 2: Emerging Parasitic Helminths part 1 (Trematodes pt. 2) Sharad Malavade, MD, MPH Original slides by Matt Tucker, M.S., MSPH, Ph.D. 1 This is lecture number 2 and this is the second part of Trematodes. Slide 2 PHC4031. Emerging Infectious Diseases 2 Check out the following links for fun: Paragonimiasis ( Paragonimus westermani , human lung fluke): Video: - fluke.html - fluke.html Schistosomiasis ( Schistosoma spp., blood fluke): Videos: - schistosomiasis-parasite.html - snail-fever.html Monsters Inside Me These are some of the links that you can click on and watch some really great videos about the parasites that we will discuss in this lecture. Slide 3 PHC4031. Emerging Infectious Diseases 3 Metorchis conjunctus Heterophyes heterophyes Metagonimus yokagawai Human lung fluke Disease Paragonimus spp. Schistosomiasis On the Menu: Lecture 2 These are the parasites that we will cover in this lecture. The most important are the Schistosomes.
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Slide 4 PHC4031. Emerging Infectious Diseases 4 North American liver fluke Causes a zoonotic foodborne infection, similar to Opisthorchis sp. Infects a wide range of fish-eating mammals including bears, wolves, foxes, coyotes, raccoons, muskrats, mink, fisher, dogs and cats, and occasionally, man. Snail and fish intermediate hosts are widespread in eastern U.S. and Canada Metorchis conjunctus Metorchis conjunctus is called the North American liver fluke. It is causes similar condition to Clonorchis. The main final definitive hosts are fish eating mammals like bears. Rarely man can get affected. It also has intermediate hosts like snails and fish that are widespread in North America. Slide 5 PHC4031. Emerging Infectious Diseases 5 Metorchis life cycle As we see here in the life cycle, it is similar to Clonorchis and Opisthorchis. The lifecycle in the wild is generally maintained with a bear eating an infected fish, the worms mature and release eggs which are passed in feces. These in water seek out snails where they develop into cercariae that leave the snail to infect fish which are eaten by bigger fish and finally the bears. When an infected fish is consumed by a human, disease similar to that of Clonorchiasis ensues. Slide 6 PHC4031. Emerging Infectious Diseases 6 Montreal, 1993 Outbreak of acute illness among 27 people who ate raw fish (sashimi) prepared from the white sucker fish, Catostomus commersoni Persistent upper abdominal pain, low grade fever, high blood eosinophil concentrations, and raised liver enzymes.
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  • Winter '14
  • Digenea, Schistosoma, Schistosomiasis

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