MTAP Flashcards
Which statement incorrectly describes Giardia
duodenalis?
Trophozoite has 2 pairs pf anterior nuclei and 4 pairs of flagella
(IT HAS 1 PAIR OF ANTERIOR NUCLEI AND 4 PAIRS OF FLAGELLA)
Which of the following incorrectly describes E.
gingivalis?
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)
Which of the following statement is correct in differentiating Entamoeba histolytica from Entamoeba coli?
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
Trypanosoma cruzi multiplies in practically every organ of the human body as the following form:
Amastigote
Infective stage of Leishmania to sandflies
Amastigote
“Sandfly takes a blood meal (ingests macrophages infected with amastigotes.” (Ch. 2 pg 126; fig. 2.26 Belizario)
Oocyst which only contains 4 sporozoites
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)
True about the asexual stage of Cystoisospora belli except:
Final asexual stage found in humans is
sporozoites
An enzyme expressed by the blood stages of all Plasmodium species:
Plasmodium aldolase
Gold standard for the detection and confirmation of malaria
Thick and thin smear
The following are vectors of W. bancrofti except:
a. anopheles ,
b. culex,
c. aedes,
d. chrysops
Chrysops
Unsheathed without nuclei and tail is shorter
M. ozzardi
Microfilaria isolated in a body cavity is unsheathed, and nuclei is continuous to tail tip:
Mansonella perstans
Which of the following statements do not correctly describe Loa loa?
Transmitted by the black simullian fly
Which of the following statements are correct:
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
Can be directly transmitted via colostrum
Strongyloides or Ancylostoma
- BOTH
True about hookworms except:
Necator americanus (has 2 pairs of curved ventral teeth) is larger than A. duodenale (has ventral pairs of semilunar cutting plates)
Eggs resemble Ascaris sp. But larger:
1. Toxocara canis
2. Paragonimus westermani
3. Toxocara cati
4. Aphids
1 and 3
Which of the following correctly describes Heterophyid flukes?
The operculum of the Heterophyid flukes do not have an abopercular protuberance unlike Clonorchis and Opistorchis
Agent of halzoun?
Sheep liver fluke
What is the 2nd intermediate host of the trematode associated with cholangiocarcinoma?
Freshwater fishes
(Clonorchis sinensis is associated with
cholangiocarcinoma)
Parasitic stage of trematodes seen emerging from the 1st intermediate:
Cercaria
Which of the following is untrue regarding Cestoidea?
Adults can be found in the tissues of the
patient
Which of the following incorrectly describes Cestoidea?
Non-hermaphroditic
Alveolar cysts:
Echinococcus multiloculares
True about E. granulosus except:
Neurological
Larval stage is called a hydatid cyst
The widest proglottid is the strobila
None of these
What does D. fragilis have in common with T. vaginalis
Neither has a cyst form
Most common morphological form of Blastocystis hominis
Vacuolated
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
The extracellular form of Trypanosoma is a slender organism characterized by an undulaitng membrane and a free flagellum that arises:
Posteriorly from the kinetoplast
Which of the following are often mistaken for cysts of amoebae?
Blastocystis hominis
Which of the malarial organisms preferentially invades polychromatophilic erythrocytes?
P. falciparum
In which type of malaria is there synchronized rupture of the RBC every 72 hours?
Malariae
Older developing stages (trophs, schizonts) of the fifth human malaria, Plasmodium knowlesi, resemble those of:
P. malariae
The sexual reproduction cycle in Plasmodia and Coccidia is referred to as:
Sporogony
Which microfilariae are usually not found circulating in the peripheral blood?
Onchocerca volvulus
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
Mosquito vectors of Brugia malayi
1. Aedes
2. Anopheles
3. Culex
4. Mansonia
I, II, IV
Stimulates microfilariae into coming out to the
peripheral circulation:
3mg/kg DEC
Which of the following allows the embryonation of Ascaris spp?
soil
Which parasite causes eosinophilic meningoencephalitis, a form of larva migrans causing fever, headache, stiff neck, and increased cells in the spinal fluid?
Angiostrongylus cantonensis
Which of the following is not untrue regarding
nematodes except?
segmented, elongated, cylindrical in shape
with bilateral symmetry
The most prevalent helminth to infect human is?
Enterobius vermicularis, the pinworm
Definitive diagnostic procedure for schistosomes?
COPT
Circulating anodic and cathodic antigen is commonly used in:
Schistosoma
Embryo found in pseudophyllidean worms that requires aquatic development
coracidium
Cat Liver Fluke
Opistorchis felineus
Which of the following is an incorrect match between organism and the appropriate diagnostic procedure?
Echinococcus granulosus- routine ova and
parasite examination
An operculated cestode egg that can be recovered from human feces is:
Diphyllobothrium latum
Pork tapeworm larvae
cysticercus cellulosae
Unstable gait and giddiness
T. solium
Which of the following incorrectly describes
Cestoidea?
Non-hermaphroditic
Alveolar cysts:
Echinococcus multiloculares
True about E. granulosus except:
None of these
Which of the following is untrue regarding
Cestoidea?
Adults can be found in the tissues of the
patient
Microfilaria isolated in a body cavity is unsheathed, and nuclei is continuous to tail tip:
Mansonella perstans
The following are vectors of W. bancrofti except:
Chrysops
What is the 2nd intermediate host of the trematode associated with
cholangiocarcinoma?
Freshwater fishes
Agent of halzoun?
Sheep liver fluke
Parasitic stage of trematodes seen emerging
from the 1st intermediate:
Cercaria
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
Pork tapeworm larvae
Cysticercus cellulosae
Two helminth eggs that may resemble one
another are:
Diphyllobothrium latum and Paragonimus
westermani
The formalin-ether (ethyl acetate)
concentration procedure for feces is used to
demonstrate:
Protozoan cyst and helminth eggs
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
Humans can serve as both the intermediate and definitive host in infections caused by:
Hymenolepsis nana
The examination of sputum may be necessary
to diagnose infection with:
Paragonimus westermani
Humans acquire infections with
Diphyllobothrium latum adult worms by:
Ingestion of raw freshwater fish
When humans have hydatid disease, the causative agent and host classification are:
Echinococcus granulosus- accidental
intermediate host
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
Parasite acquired through accidental ingestion
of uncooked crayfish
Lung fluke
Vector for African eye worm
Chrysops
