Test 3

Front 1

The mature adult stage of a worm may be found in a/an __ host.

Back 1

definitive

Front 2

Which of the following has no digestive system?

Back 2

Cestoda

Front 3

A hydatid cyst is the result of infection with the larval stage of the canine cestode:

Back 3

Echinococcus granulosus.

Front 4

A liver parasite of humans and other mammals, the trematode ___ is acquired by eating raw freshwater plants.

Back 4

Fasciola hepatica

Front 5

Infection with the nematode ___ is acquired by ingesting the eggs. The most common symptom of infection is itching in the anal area.

Back 5

Enterobius vermicularis.

Front 6

Protozoa that use pseudopodia for motility are members of the group:

Back 6

Amoeba/Sarcodina.

Front 7

The protozoan ___ causes ciliate dysentery in pigs and humans, and is the only Ciliophoran known to cause disease in humans.

Back 7

Balantidium coli

Front 8

Microscopic examination of a fecal sample for the presence of the parasite is useful in diagnosing:

Back 8

balantidiosis

Front 9

All Nematodes are parasites.

Back 9

false

Front 10

Which of the following is a leaf-shaped unsegmented flatworm?

Back 10

Trematoda

Front 11

An intermediate host is one in which the __ stage of a worm lives.

Back 11

larva

Front 12

Which of the following is generally diagnosed in humans by examining a blood sample?

Back 12

Wuchereria bancrofti

Front 13

Which of the following in NOT a target for drugs used to treat infections with worms?

Back 13

protein synthesis

Front 14

The larva of the trematode ___ mature in freshwater snails, then infect humans by burrowing into the skin.

Back 14

Shistosoma mansoni

Front 15

Infection with the nematode ___ results when the elongated oval eggs are ingested. A common symptom of infection is anal itching.

Back 15

Enterobius vermicularis

Front 16

Swine are the normal intermediate host, and humans are the definitive hosts for the cestode:

Back 16

Taenia solium

Front 17

The __ is transmitted fecal-orally. Symptoms of infection include abdominal pain, fever and vomiting.

Back 17

Intestinal roundworm

Front 18

Various mammals can be infected with the trematode __ which is acquired by ingestion.

Back 18

Fasciola hepatica

Front 19

A variety of mammals can be the host for the nematode ___, which is acquired by eating undercooked meat containing the encysted larva.

Back 19

Trichinella spiralis

Front 20

The cestode most commonly diagnosed in people in the US is:

Back 20

The cestode most commonly diagnosed in people in the US is:

Front 21

Bare skin contact with soil contaminated with human feces may result in infection with the nematode:

Back 21

Necator americanus

Front 22

A hydatid cyst is the result of infection with the larval stage of the canine cestode:

Back 22

Echinococcus granulosus

Front 23

The nematode parasite ___ does NOT produce eggs and is transmitted by a vector.

Back 23

Wuchereria bancrofti

Front 24

The most common helminth parasite in the U.S.A. is:

Back 24

pinworm

Front 25

Dogs are the definitive host for the cestode ___, fleas are the intermediate host, and humans may be accidental hosts.

Back 25

Dipylidium caninum

Front 26

Which of the following helminth diseases is routinely treated by surgery?

Back 26

hydatidosis

Front 27

Thoroughly cooking meat is an effective way to prevent infection with:

Back 27

Trichinella spiralis
b. Taenia saginata
c. Taenia solium

Front 28

Secondary pneumonia infections sometimes result from heavy infections with the nematode:

Back 28

Ascaris lumbricoides

Front 29

Tapeworms are generally transmitted by:

Back 29

consumption of an intermediate host.

Front 30

The most common helminth infection in the world is with:

Back 30

Ascaris lumbricoides

Front 31

A good strategy for reducing infection with ____ is to treat human sewage properly.

Back 31

Ascaris lumbricoides

Front 32

Which of the following human diseases is due to infection with the larval stage of a parasitic worm, rather than the adult stage?

Back 32

cysticercosis
b. hydatidosis
c. trichinellosis
d. All of the above.

Front 33

Humans can be accidental intermediate hosts for:

Back 33

Echinococcus granulosus.
c. Taenia solium.

Front 34

Protozoa which are non-motile are members of the:

Back 34

Apicomplexa/Sporozoa.

Front 35

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.

Back 35

Plasmodium malariae

Front 36

The sand fly is the vector for the Flagellate/Mastigophoran __ which produces serious lesions of the skin or mucous membranes.

Back 36

Leishmania

Front 37

Human disease can be reduced by vaccinating dogs against infection with:

Back 37

Giardia intestinalis.

Front 38

The intestinal Apicomplexan/Sporozoan ___ causes a zoonosis spread by the fecal-oral route and is considered a major cause of diarrheal disease.

Back 38

Cryptosporidium parvum

Front 39

The Kinetoplastid/Mastigophoran ___ is transmitted by the kissing bug and causes a potentially fatal chronic infection.

Back 39

Trypanosoma cruzi

Front 40

Both humans and pigs can be infected with the Ciliophoran ___, resulting in diarrhea which may contain blood.

Back 40

Balantidium coli

Front 41

Ingestion of the Apicomplexan/Sporozoan ___ may result in asymptomatic infection in healthy people, but can lead to death of immunocompromised persons and fetuses.

Back 41

Toxoplasma gondii

Front 42

The Parabasala/Flagellate ___ has no cyst stage, is a parasite of human oral cavities and is transmitted in saliva.

Back 42

Trichomonas tenax

Front 43

Keratitis can result from placing contact lenses contaminated with the Amoeba/Sarcodina ___ into the eye.

Back 43

Acanthamoeba

Front 44

Which of the following can cross the placenta to infect a developing fetus?

Back 44

Plasmodium
Toxoplasma gondii

Front 45

Examination of a stool sample under a microscope is useful in diagnosing:

Back 45

ciliate dysentery

Front 46

The Parabasala/Flagellate ___ has no cyst stage, is a parasite of humans only and is transmitted as an STD.

Back 46

Trichomonas vaginalis

Front 47

The Amoeba/Sarcodina ___ is a true pathogen of humans which causes amoebic dysentery in humans that can occasionally progress to severe extraintestinal disease (“amoebiasis”).

Back 47

Entamoeba histolytica

Front 48

The definitive hosts for Plasmodium vivax are:

Back 48

mosquitoes.

Front 49

The early symptoms of ___ are diarrhea with flatulence. As the disease progresses, the individual may suffer weight loss, muscle aches and headaches.

Back 49

giardiasis

Front 50

Which of the following is a zoonosis?

Back 50

American trypanosomiasis

Front 51

Which of the following can be contracted by eating undercooked meat of intermediate host animals?

Back 51

Toxoplasma gondii

Front 52

Invasion of the internal organs by the vector transmitted Kinetoplastid __ results in potentially fatal disease.

Back 52

Leishmania

Front 53

Fever, chills and anemia are signs and symptoms of:

Back 53

malaria
b. visceral leshmaniasis

Front 54

The disease __ is fatal in the absence of treatment because the parasite has a genetic trick that allows it to evade the immune system.

Back 54

Chaga's disease

Front 55

The term for the sexual reproductive phase of the Apicomplexa/Sporozoa is:

Back 55

syngamy.

Front 56

clinical sign of parasitic infection common to most parasite infections is:

Back 56

eosinophilia.

Front 57

Which of the following parasitic diseases is a leading killer (among the top ten) among infectious diseases worldwide?

Back 57

malaria