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From Flashcardlet > BMS 127 Ch. 23 Parasitic Protozoa, Helminths, and Arthropod Vectors > Flashcards

BMS 127 Ch. 23 Parasitic Protozoa, Helminths, and Arthropod Vectors Flashcards

0
Q

The only ciliate to cause disease in humans is

a. Naegleria
b. Balantidium
c. Fasicola
d. Trypanosoma

A

b. Balantidium

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1
Q

Parasitology is the study of

a. parasitic viruses
b. parasitic prokaryotes
c. parasitic fungi
d. parasitic eukaryotes

A

d. parasitic eukaryotes

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2
Q

Which of the following organisms is regularly transmitted sexually?

a. Trichomonas
b. Entamoeba
c. Trypanosoma
d. Enterobius

A

a. Trichomonas

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3
Q

Leishmania species are transmitted by

a. sand flies
b. tsetse flies
c. kissing bugs
d. mosquitos

A

a. sand flies

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4
Q

Which of the following is the name of the intracellular infection stage of Leishmania?

a. miracidia
b. metacercaria
c. bradyzoite
d. amastigote

A

d. amastigote

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5
Q

In malaria, which stage occurs in red blood cells?

A

erythrocytic cycle

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6
Q

What is the definitive host for Toxoplasma gondii?

A

cats

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7
Q

How are tapeworms generally transmitted?

A

consumption of an intermediate host

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8
Q

Cryptosporidium cannot be killed by routine boiling. Another parasite resistant to such boiling is

a. Giardia
b. Trypanosoma
c. Toxoplasma
d. Plasmodium

A

a. Giardia

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9
Q

What are the immature fluke stages that infect snail intermediate hosts called?

A

miracidia

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10
Q

What is the scientific name for the beef tapeworm?

A

Taenia saginata

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11
Q

What is the common name for Enterobius vermicularis?

A

pinworms

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12
Q

The infective larvae of Necator americanus must pass through which human organ to mature?

A

lung

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13
Q

What genus of mosquito can carry both Plasmodium and Wuchereria bancrofti?

A

Anopheles

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14
Q

Which of the following arthropods is responsible for transmitting the most parasitic diseases?

a. fleas
b. ticks
c. mosquitos
d. true bugs

A

c. mosquitos

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15
Q

How are the majority of cestodes transmitted?

A

ingestion

16
Q

Which of the following is most effective in preventing infection by Giardia?

a. sexual abstinence
b. drinking only bottled water
c. use of insect repellant
d. cooking all food

A

b. drinking only bottled water

17
Q

The sporogonic phase of Plasmodium occurs in

a. red blood cells
b. liver cells
c. schizonts
d. Anopheles mosquitos

A

d. Anopheles mosquitos

18
Q

What is the tapeworm attachment organ called?

A

scolex

19
Q

Trophozoite-cyst conversion is vital to the life of

a. Balantidium
b. Entamoeba
c. Giardia
d. All of the above

A

d. All of the above

20
Q

__________ is the most common method of transmitting parasites.

A

Ingestion

21
Q

Examination of __________, _________, and __________ can reveal the presence of Naegleria parasites.

A

corneal scraping; cerebrospinal fluid; biopsy material

22
Q

_____________ ___________ is the most common parasitic protozoan of humans in the industrialized world.

A

Trichomonas vaginalis

23
Q

Trypanosoma ________ is transmitted by tsetse flies and Trypanosoma _______ is transmitted by kissing bugs.

A

brucei; cruzi

24
Q

______________ ____________ causes the most serious form of malaria.

A

Plasmodium falciparum

25
Q

Toxoplasmosis can be transmitted across the ________.

A

placenta

26
Q

Humans can become intermediate hosts for _________ _________.

A

Taenia solium

27
Q

Fasicola hepatica can be acquired by eating infected ____________.

A

water plants

28
Q

The number of cases of schistosomiasis has _______ worldwide owing to improved technology and economic stability in endemic areas.

A

increased

29
Q

Wuchereria bancrofti is a filarial nematode that infects the ___________ ________.

A

l;ymphatic system

30
Q

Balantidium coli can be distinguished from Entamoeba histolytica microscopically because B. coli has _________.

A

cillia

31
Q

_______________ _________ may be transmitted to humans from cat litter boxes.

A

Toxoplasma gondii

32
Q

The parasitic amoeba ______ can be acquired by ingestion.

A

Entamoeba

33
Q

Plasmodium vivax and P. ovale can both form dormant ___________.

A

hypnozoites

34
Q

What is the only parasitic helminth transmitted by mosquitos?

A

Wuchereria

35
Q

What three heminths can penetrate the skin of humans to establish an infection?

A

Ancylostoma, Necator, and Schistosoma

36
Q

What trematode can be acquired by eating raw or undercooked vegetables?

A

Fasicola

37
Q

Hookworm disease is caused by ______________ in the Middle East.

A

Anclyostoma

38
Q

What two parasites demonstrate nocturnal movement, which is important for diagnosis?

A

Enterobius vermicularis and Wuchereria bancrofti

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