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MTAP Flashcards

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1
Q

Which statement incorrectly describes Giardia
duodenalis?

A

Trophozoite has 2 pairs pf anterior nuclei and 4 pairs of flagella

(IT HAS 1 PAIR OF ANTERIOR NUCLEI AND 4 PAIRS OF FLAGELLA)

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2
Q

Which of the following incorrectly describes E.
gingivalis?

A

Ingests RBCs

E. gingivalis can be found in the mouth. the troph measures 10 to 20um. It moves quicklyand has numerous blunt psedopodia. Food vacuoles that contain cellular debris (mostly leukocytes, which is a characteristic of this spp.) and bacteria. (Ch. 2 pg. 31 Belizario)
… This specie has no cyst stage. (Ch. 2 pg. 31 Belizario)

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3
Q

Which of the following statement is correct in differentiating Entamoeba histolytica from Entamoeba coli?

A

Entamoeba histolytica troph has a progressive and monodirectional motility and has a centrally located karyosome, whereas Entamoeba coli has a more sluggish and multidirectional motility and an eccentrically located karyosome

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4
Q

Trypanosoma cruzi multiplies in practically every organ of the human body as the following form:

A

Amastigote

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5
Q

Infective stage of Leishmania to sandflies

A

Amastigote

“Sandfly takes a blood meal (ingests macrophages infected with amastigotes.” (Ch. 2 pg 126; fig. 2.26 Belizario)

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6
Q

Oocyst which only contains 4 sporozoites

A

Cryptosporidium hominis

(T. gondi and C. belli: 2 sporocyst each containing 4 sporozoites
C. cayentanensis: 2 sporocyst each containing 2 sporozoites
C. hominis/ C. parvum: oocyst contains only 4
sporozoites)

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7
Q

True about the asexual stage of Cystoisospora belli except:

A

Final asexual stage found in humans is
sporozoites

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8
Q

An enzyme expressed by the blood stages of all Plasmodium species:

A

Plasmodium aldolase

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9
Q

Gold standard for the detection and confirmation of malaria

A

Thick and thin smear

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10
Q

The following are vectors of W. bancrofti except:
a. anopheles ,
b. culex,
c. aedes,
d. chrysops

A

Chrysops

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11
Q

Unsheathed without nuclei and tail is shorter

A

M. ozzardi

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12
Q

Microfilaria isolated in a body cavity is unsheathed, and nuclei is continuous to tail tip:

A

Mansonella perstans

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13
Q

Which of the following statements do not correctly describe Loa loa?

A

Transmitted by the black simullian fly

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14
Q

Which of the following statements are correct:

A

Rhabditiform larvae of hookworms have an elongated buccal cavity and a short genital primordium whereas, Strongyloides’ rhabditiform larvae have an elongated esophagus, short buccal cavity and a large genital primordial

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15
Q

Can be directly transmitted via colostrum

A

Strongyloides or Ancylostoma
- BOTH

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16
Q

True about hookworms except:

A

Necator americanus (has 2 pairs of curved ventral teeth) is larger than A. duodenale (has ventral pairs of semilunar cutting plates)

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17
Q

Eggs resemble Ascaris sp. But larger:
1. Toxocara canis
2. Paragonimus westermani
3. Toxocara cati
4. Aphids

A

1 and 3

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18
Q

Which of the following correctly describes Heterophyid flukes?

A

The operculum of the Heterophyid flukes do not have an abopercular protuberance unlike Clonorchis and Opistorchis

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19
Q

Agent of halzoun?

A

Sheep liver fluke

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20
Q

What is the 2nd intermediate host of the trematode associated with cholangiocarcinoma?

A

Freshwater fishes
(Clonorchis sinensis is associated with
cholangiocarcinoma)

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21
Q

Parasitic stage of trematodes seen emerging from the 1st intermediate:

A

Cercaria

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22
Q

Which of the following is untrue regarding Cestoidea?

A

Adults can be found in the tissues of the
patient

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23
Q

Which of the following incorrectly describes Cestoidea?

A

Non-hermaphroditic

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24
Q

Alveolar cysts:

A

Echinococcus multiloculares

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25
True about E. granulosus except: Neurological Larval stage is called a hydatid cyst The widest proglottid is the strobila
None of these
26
What does D. fragilis have in common with T. vaginalis
Neither has a cyst form
27
Most common morphological form of Blastocystis hominis
Vacuolated
28
A very large cyst whose double wall encloses a ciliated organism with one visible nuclei would be:
Acquired by accident by man, since it customarily infects swine
29
The extracellular form of Trypanosoma is a slender organism characterized by an undulaitng membrane and a free flagellum that arises:
Posteriorly from the kinetoplast
30
Which of the following are often mistaken for cysts of amoebae?
Blastocystis hominis
31
Which of the malarial organisms preferentially invades polychromatophilic erythrocytes?
P. falciparum
32
In which type of malaria is there synchronized rupture of the RBC every 72 hours?
Malariae
33
Older developing stages (trophs, schizonts) of the fifth human malaria, Plasmodium knowlesi, resemble those of:
P. malariae
34
The sexual reproduction cycle in Plasmodia and Coccidia is referred to as:
Sporogony
35
Which microfilariae are usually not found circulating in the peripheral blood?
Onchocerca volvulus
36
After returning from a 2-year stay in India, a patient has eosinophilia, an enlarged left spermatic cord, and bilateral inguinal lymphadenopathy. The most likely clinical specimen and organism match is:
thick blood films-microfilariae
37
Mosquito vectors of Brugia malayi 1. Aedes 2. Anopheles 3. Culex 4. Mansonia
I, II, IV
38
Stimulates microfilariae into coming out to the peripheral circulation:
3mg/kg DEC
39
Which of the following allows the embryonation of Ascaris spp?
soil
40
Which parasite causes eosinophilic meningoencephalitis, a form of larva migrans causing fever, headache, stiff neck, and increased cells in the spinal fluid?
Angiostrongylus cantonensis
41
Which of the following is not untrue regarding nematodes except?
segmented, elongated, cylindrical in shape with bilateral symmetry
42
The most prevalent helminth to infect human is?
Enterobius vermicularis, the pinworm
43
Definitive diagnostic procedure for schistosomes?
COPT
44
Circulating anodic and cathodic antigen is commonly used in:
Schistosoma
45
Embryo found in pseudophyllidean worms that requires aquatic development
coracidium
46
Cat Liver Fluke
Opistorchis felineus
47
Which of the following is an incorrect match between organism and the appropriate diagnostic procedure?
Echinococcus granulosus- routine ova and parasite examination
48
An operculated cestode egg that can be recovered from human feces is:
Diphyllobothrium latum
49
Pork tapeworm larvae
cysticercus cellulosae
50
Unstable gait and giddiness
T. solium
51
Which of the following incorrectly describes Cestoidea?
Non-hermaphroditic
52
Alveolar cysts:
Echinococcus multiloculares
53
True about E. granulosus except:
None of these
54
Which of the following is untrue regarding Cestoidea?
Adults can be found in the tissues of the patient
55
Microfilaria isolated in a body cavity is unsheathed, and nuclei is continuous to tail tip:
Mansonella perstans
56
The following are vectors of W. bancrofti except:
Chrysops
57
What is the 2nd intermediate host of the trematode associated with cholangiocarcinoma?
Freshwater fishes
58
Agent of halzoun?
Sheep liver fluke
59
Parasitic stage of trematodes seen emerging from the 1st intermediate:
Cercaria
60
In a condition resulting from the accidental ingestion of eggs, the human becomes the intermediate rather than the definitive host. The correct answer is:
Cysticercosis
61
Pork tapeworm larvae
Cysticercus cellulosae
62
Two helminth eggs that may resemble one another are:
Diphyllobothrium latum and Paragonimus westermani
63
The formalin-ether (ethyl acetate) concentration procedure for feces is used to demonstrate:
Protozoan cyst and helminth eggs
64
An immunosuppressed man his several episodes of pneumonia, intestinal pain, sepsis with gram-negative rods, and a history of military service in Southeast Asia 20 years earlier. The most likely cause is infection with:
Strongyloides stercoralis
65
Humans can serve as both the intermediate and definitive host in infections caused by:
Hymenolepsis nana
66
The examination of sputum may be necessary to diagnose infection with:
Paragonimus westermani
67
Humans acquire infections with Diphyllobothrium latum adult worms by:
Ingestion of raw freshwater fish
68
When humans have hydatid disease, the causative agent and host classification are:
Echinococcus granulosus- accidental intermediate host
69
A 45-year old hunter developed fever, myalgia, and periorbital edema. He has history of bear meat consumption. The most likely causative agent.
Trichinella spiralis
70
Parasite acquired through accidental ingestion of uncooked crayfish
Lung fluke
71
Vector for African eye worm
Chrysops

PARA (5 decks)

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