Para

Question 1

Artifacts found in a stool specimen that can be confused with ova or cysts are:

Answer 1

Pollen grain

Question 2

Polyvinyl alcohol used in the preparation of permanently stained smears of fecal material:

Answer 2

Serves as an adhesive

Question 3

A method to culture acanthamoeba species from corneal ulcer scrapings is to inoculate

Answer 3

An agar plate overlaid with eschericia Coli

Question 4

Primary amoebic encephalitis is caused by;

Answer 4

Naegleria Fowleri

Question 5

A formed stool is received in the laboratory at 10:30 pm for ova and parasite exam.

Answer 5

Preserve the specimen in formalin until it can be examined

Question 6

The advantage of thick blood smears for malarial parasites is to:

Answer 6

Improve detection of the organisms

Question 7

This parasite is transmitted by accidental ingestion of cat feces that contain oocyte and by ingestion of undercooked meat that has tissue cysts

Answer 7

Toxoplasma gondii

Question 8

A 44-year old man is admitted to the hospital following a 2-week history of low-grade fever, malaise and anorexia

Answer 8

Plasmodium falciparum

Question 9

A wright-stained peripheral smear reveals the following: (this is consistent with plasmodium )

Answer 9

Vivax

Question 10

A patient is suspected of having amoebic dysentery

Answer 10

Entamoeba histolytica

Question 11

Trophozoïtes of the cyst shown in the image are likely to:

Answer 11

Have slow, undefined motility

Question 12

Upon finding the organism shown in a fecal concentrate, the technologist should:

Answer 12

Review the fecal concentration carefully for the presence of other microorganisms that may be pathogenic

Question 13

Which organisms are shown together in the image

Answer 13

E. Histolytica and E. Hart manni

Question 14

The structure on the right in the image depicts a:

Answer 14

Cyst of non pathogenic amoeba

Question 15

The organism shown in the image is a (n) (may parang eyes and like mumu

Answer 15

Flagellate

Question 16

A 24-year old woman, who just returned from vacationing in Lebanon

Answer 16

Giardiasis

Question 17

A liquid stool specimen is collected at 10:00 pm and brought to the laboratory for culture and ova and parasite examination.it is refrigerated until 10:10 am the next day, when the physician requests that the technologist look for amoebic trophozoites

Answer 17

Request a fresh specimen

Question 18

Small protozoan get are found in a wet mount of sediment from ethyl- acetate concentrated material.

Answer 18

Endolimax nana

Question 19

The term “internal auto infection” is generally used in referring to infections with:

Answer 19

Strongyloides stercoralis

Question 20

A fibrous skin nodule is removed from the back of a patient from Central America.

Answer 20

Onchocerca volvulus

Question 21

The egg shown in the image is most likely to be found in children suffering from:

Answer 21

Perianal itching

Question 22

The specimen of choice for finding the parasite shown in the image is:

Answer 22

Scotch tape preparation

Question 23

Human feces is not a recommended specimen in the detection of:

Answer 23

Echinococcus granulosus

Question 24

The causative agent of cysticerosis is:

Answer 24

Tania solium

Question 25

Organisms that can be easily identified to the species level from the ova in fecal specimens include:

Answer 25

Paragonimus westermani, hymenolepis nana

Question 26

The preferred specimen for the diagnosis of paragonimiasis is:

Answer 26

Sputum

Question 27

A stool specimen for ova and parasite examination contained numerous rhabditiform larvae. Which factors aid in the identification of larvae?

Answer 27

Length of the buccal cavity and appearance of the genital primordial

Question 28

Which one of the following routine tests for entamoeba histolytica has the highest sensitivity and specificity?

Answer 28

Stool EIA

Question 29

What is the principal means of distinguishing entamoeba histolytica from entamoeba Hartmann by light microscope?

Answer 29

Size of trophozoite

Question 30

Which characteristic will identify lodamoeba butschilii?

Answer 30

Prominent vacuole in the cyst form

Question 31

The only medically significant ciliate organism is:

Answer 31

Balantidium coli

Question 32

Where do plasmodium sporozoites proliferate?

Answer 32

Liver

Question 33

Individuals who lack the Duffy antigen on the surface of their RBC are protected against which species of plasmodium?

Answer 33

P. Vivax

Question 34

Which nematode produces eggs with characteristic hyaline polar plugs at each end, as in the image?

Answer 34

Trichuris trichiura

Question 35

Which nematode has a characteristic mammillated bile stained egg, as in the image?

Answer 35

Ascaris

Question 36

Which organism is predominantly responsible for visceral larva migrant?

Answer 36

Toxocara canis

Question 37

Which organism has the largest egg?

Answer 37

Fasciola

Question 38

The eggs of which species of schistosoma can be isolated from urine?

Answer 38

S. Haematobium

Question 39

Which one of the following features of Tania saginata helps distinguish it from T. Solium?

Answer 39

Unarmed rostellum

Question 40

Infection by this organism can cause B12 deficiency;

Answer 40

Diphyllobothrium latum

Question 41

The organism is responsible for hydrated cysts of the liver:

Answer 41

Echinococcus

Question 42

How is trichomonas vaginalis transmitted ?

Answer 42

Sexual contact

Question 43

This parasite has the following characteristics:
a. Banana shaped gametocgtes in RBCs
b. Multiple ring forms in RBCs
c. All RBCs are infected

Answer 43

Plasmodium falciparum

Question 44

This parasite has the following characteristics:
a. Stains red with acid-fast stain
b. Zoonotic transfer to humans
c. Spread by fecal-oral route

Answer 44

Cryptosporidium