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57 Cards in this Set

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The mature adult stage of a worm may be found in a/an __ host.
definitive
Which of the following has no digestive system?
Cestoda
A hydatid cyst is the result of infection with the larval stage of the canine cestode:
Echinococcus granulosus.
A liver parasite of humans and other mammals, the trematode ___ is acquired by eating raw freshwater plants.
Fasciola hepatica
Infection with the nematode ___ is acquired by ingesting the eggs. The most common symptom of infection is itching in the anal area.
Enterobius vermicularis.
Protozoa that use pseudopodia for motility are members of the group:
Amoeba/Sarcodina.
The protozoan ___ causes ciliate dysentery in pigs and humans, and is the only Ciliophoran known to cause disease in humans.
Balantidium coli
Microscopic examination of a fecal sample for the presence of the parasite is useful in diagnosing:
balantidiosis
All Nematodes are parasites.
false
Which of the following is a leaf-shaped unsegmented flatworm?
Trematoda
An intermediate host is one in which the __ stage of a worm lives.
larva
Which of the following is generally diagnosed in humans by examining a blood sample?
Wuchereria bancrofti
Which of the following in NOT a target for drugs used to treat infections with worms?
protein synthesis
The larva of the trematode ___ mature in freshwater snails, then infect humans by burrowing into the skin.
Shistosoma mansoni
Infection with the nematode ___ results when the elongated oval eggs are ingested. A common symptom of infection is anal itching.
Enterobius vermicularis
Swine are the normal intermediate host, and humans are the definitive hosts for the cestode:
Taenia solium
The __ is transmitted fecal-orally. Symptoms of infection include abdominal pain, fever and vomiting.
Intestinal roundworm
Various mammals can be infected with the trematode __ which is acquired by ingestion.
Fasciola hepatica
A variety of mammals can be the host for the nematode ___, which is acquired by eating undercooked meat containing the encysted larva.
Trichinella spiralis
The cestode most commonly diagnosed in people in the US is:
The cestode most commonly diagnosed in people in the US is:
Bare skin contact with soil contaminated with human feces may result in infection with the nematode:
Necator americanus
A hydatid cyst is the result of infection with the larval stage of the canine cestode:
Echinococcus granulosus
The nematode parasite ___ does NOT produce eggs and is transmitted by a vector.
Wuchereria bancrofti
The most common helminth parasite in the U.S.A. is:
pinworm
Dogs are the definitive host for the cestode ___, fleas are the intermediate host, and humans may be accidental hosts.
Dipylidium caninum
Which of the following helminth diseases is routinely treated by surgery?
hydatidosis
Thoroughly cooking meat is an effective way to prevent infection with:
Trichinella spiralis
b. Taenia saginata
c. Taenia solium
Secondary pneumonia infections sometimes result from heavy infections with the nematode:
Ascaris lumbricoides
Tapeworms are generally transmitted by:
consumption of an intermediate host.
The most common helminth infection in the world is with:
Ascaris lumbricoides
A good strategy for reducing infection with ____ is to treat human sewage properly.
Ascaris lumbricoides
Which of the following human diseases is due to infection with the larval stage of a parasitic worm, rather than the adult stage?
cysticercosis
b. hydatidosis
c. trichinellosis
d. All of the above.
Humans can be accidental intermediate hosts for:
Echinococcus granulosus.
c. Taenia solium.
Protozoa which are non-motile are members of the:
Apicomplexa/Sporozoa.
The mosquito is the vector for the Apicomplexan/Sporozoan ___, which invades both human liver and red blood cells, causing a disease characterized by fever, chills and anemia.
Plasmodium malariae
The sand fly is the vector for the Flagellate/Mastigophoran __ which produces serious lesions of the skin or mucous membranes.
Leishmania
Human disease can be reduced by vaccinating dogs against infection with:
Giardia intestinalis.
The intestinal Apicomplexan/Sporozoan ___ causes a zoonosis spread by the fecal-oral route and is considered a major cause of diarrheal disease.
Cryptosporidium parvum
The Kinetoplastid/Mastigophoran ___ is transmitted by the kissing bug and causes a potentially fatal chronic infection.
Trypanosoma cruzi
Both humans and pigs can be infected with the Ciliophoran ___, resulting in diarrhea which may contain blood.
Balantidium coli
Ingestion of the Apicomplexan/Sporozoan ___ may result in asymptomatic infection in healthy people, but can lead to death of immunocompromised persons and fetuses.
Toxoplasma gondii
The Parabasala/Flagellate ___ has no cyst stage, is a parasite of human oral cavities and is transmitted in saliva.
Trichomonas tenax
Keratitis can result from placing contact lenses contaminated with the Amoeba/Sarcodina ___ into the eye.
Acanthamoeba
Which of the following can cross the placenta to infect a developing fetus?
Plasmodium
Toxoplasma gondii
Examination of a stool sample under a microscope is useful in diagnosing:
ciliate dysentery
The Parabasala/Flagellate ___ has no cyst stage, is a parasite of humans only and is transmitted as an STD.
Trichomonas vaginalis
The Amoeba/Sarcodina ___ is a true pathogen of humans which causes amoebic dysentery in humans that can occasionally progress to severe extraintestinal disease (“amoebiasis”).
Entamoeba histolytica
The definitive hosts for Plasmodium vivax are:
mosquitoes.
The early symptoms of ___ are diarrhea with flatulence. As the disease progresses, the individual may suffer weight loss, muscle aches and headaches.
giardiasis
Which of the following is a zoonosis?
American trypanosomiasis
Which of the following can be contracted by eating undercooked meat of intermediate host animals?
Toxoplasma gondii
Invasion of the internal organs by the vector transmitted Kinetoplastid __ results in potentially fatal disease.
Leishmania
Fever, chills and anemia are signs and symptoms of:
malaria
b. visceral leshmaniasis
The disease __ is fatal in the absence of treatment because the parasite has a genetic trick that allows it to evade the immune system.
Chaga's disease
The term for the sexual reproductive phase of the Apicomplexa/Sporozoa is:
syngamy.
clinical sign of parasitic infection common to most parasite infections is:
eosinophilia.
Which of the following parasitic diseases is a leading killer (among the top ten) among infectious diseases worldwide?
malaria