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Chapter 12

Major Helminths of Humans

Q: Disease caused by Enterobius vermicularis (pinworm)… A: Enterobiasis which affects 500 million people worldwide and 40 million Americans.
Q: Hosts of Enterobius vermicularis… A: Humans are both the definitive and intermediate host.
Q: Symptoms of Enterobius vermicularis… A: Nocturnal perianal and vulvar pruritus (itching).
Q: Disease caused by Trichinella spiralis… A: Trichinosis (spread by eating raw pork) with 150 to 300 thousand new infections annually in the USA.
Q: Hosts of Trichinella spiralis… A: Intermediate host is rats, pigs, and humans; Definitive host is human.
Q: Necator americanus & Ancylostoma duodenale are both what type of worm? A: Hookworm.
Q: Hosts of Necator americanus & Ancylostoma duodenale… A: Humans are both intermediate & definitive host.
Q: Iron deficiency anemia is linked to which helminths? A: Necator americanus & Ancylostoma duodenale (hookworms).
Q: Hosts for Strongyloides stercoralis (thread worm)… A: Humans are both intermediate & definitive host.
Q: Hosts for Ascaris lumbricoides… A: Humans are both intermediate & definitive host.
Q: What is the most common helminth infection? A: Ascaris lumbricoides which causes ascariasis in more than 1 billion people worldwide.
Q: Hosts for Wuchereria bancrofti… A: Humans & mosquitoes (Culex, Aedes, & Anopheles).
Q: Disease caused by Wuchereria bancrofti… A: Filariasis.
Q: Hosts for Trichuris trichuris (whipworm)… A: Humans are both intermediate & definitive host.
Q: Hosts for Schistosoma haematobium… A: Snails & humans.
Q: Disease of Schistosoma haematobium (blood fluke)… A: Schistosomiasis, Bilharzia, “swimmer’s itch” (common in Nile Valley, Africa, & Asia Minor.
Q: Hosts for Schistosoma japonicum… A: Snails & humans.
Q: Disease of Schistosoma japonicum… A: Schistosomiasis, Bilharzia (common in China, Japan, Philippines, & Indonesia).
Q: Hosts for Schistosoma mansoni… A: Snails & humans.
Q: Disease of Schistosoma mansoni… A: Schistosomiasis, Bilharzia (common in Africa, Saudi Arabia, Madagascar, Brazil, Venezuela, West Indies, & Puerto Rico).
Q: Hosts for Fasciola hepatica… A: Humans, snails, fish, sheep, cattle.
Q: Hosts for Taenia saginata… A: Intermediate host is beef; definitive host is humans.
Q: Hosts for Taenia solium… A: Intermediate host is pigs; definitive host is humans.
Q: Macrocytic megaloblastic anemia (pernicious anemia) is associated with what? A: Diphyllobothrium latum (fish tapeworm).
Q: Hosts of Diphyllobothrium latum… A: Intermediate host is fish; definitive host is humans.
Q: Vitamin B12 deficiency is associated with which helminth? A: Diphyllobothrium latum (fish tapeworm).
Q: Hosts for Echinococcus granulosus… A: Dogs & sheep are intermediate host; Humans are definitive host.
Q: Name that worm… Enterobius vermicularis A: Pinworm.
Q: Name that worm… Trichuris trichuris A: Whipworm.
Q: Name that worm… Necator americanus & Ancylostoma duodenale A: Hookworms.
Q: Name that worm… Strongyloides stercoralis A: Threadworm.
Q: Name that worm… Ascaris lumbricoides A: Ascaris.
Q: Name that worm… Trichinella spiralis A: Trichinella.
Q: Name that worm… Wuchereria bancrofti A: Filaria.
Q: Name that fluke… Schistosomes A: Blood fluke.
Q: Name that fluke… Fasciola, Clonorchis, Opisthorchis A: Liver flukes.
Q: Name that fluke… Fasciolopsis, Echinostoma A: Intestinal flukes.
Q: Name that fluke… Paragonimus A: Lung flukes
Q: Why you shouldn’t eat sushi… A: Diphyllobothrium latum.
Created by: PCC Microbiology

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