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6 Cards in this Set
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- Back
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List three protozoans that cause intestinal tract infections.
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Giardia lamblia, entamoeba histolytica, cryptosporidium parvum
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What is the definitive host of a helminth?
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The definitive host of a helminth is the host in which the sexually mature from grows.
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What are the two physiological components (an their functions) of a tapeworm?
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The two physiological components of a tapeworm are the scolex, the head with a sucker or hooks for attachment, and the proglottids, what are uteri that fill with eggs
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How is Taenia saginata acquired?
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eating tapworms cyst in undercooked beef
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Describe pinworm (Enterobius vermicularis) spread and detection.
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result of scratching anus where the eggs are laid. Detection is by using a cellophane tape that is pressed against the anal area and then observed microscopically
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Describe the circuitous route of Ascarius.
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The eggs of Ascaris develop into larvae on plants. They are eaten and swallowed, then penetrate the intestinal walls and pass through the lymph and lung to be coughed up and swallowed again to reinfect the intestinal tract. Eggs are passed out with the feces and contaminated plants to complete the cycle.
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