Parasitology

Question 1

Which of the Protozoan cyst below often contain chromatoidal bars, which tend to be splinter shaped and irregular?

Answer 1

B. Entamoeba coli

Question 2

Which refers to the protozoan parasite of pigs and monkeys

Answer 2

A. Entamoeba polecki

Question 3

What protozoan parasite whose cytosome is referred to as a “shepherd’s crook” with a lemon or pear shape

Answer 3

C. Chilomastix mesnili

Question 4

Which protozoan resembles Chilomastix cyst with “bird beak” fibril arrangement

Answer 4

D. Retortamonas intestinalis

Question 5

Which of the following dimensions in the template used in Kato Katz technique will containing 20 mg of stool

Answer 5

D. 6.5 mm x 0.5mm

Question 6

Which nucleus is responsible for reproduction in the trophozoite stage of the Balantidium coli?

Answer 6

Macronucleus

Question 7

Which of the following is not a characteristic of Dientamoeba fragilis?

Answer 7

Generally has 4 nuclei

Question 8

What is the treatment of choice for balantidiasis

Answer 8

Tetracycline

Question 9

A 40 y.o male with HIV, presented with diarrhea of 2 weeks. Acid-fast staining of his stool revealed red-pink doughnut-shaped circular organisms resembling oocysts. What parasite is the possible cause of his diarrhea

Answer 9

Cryptosporidium hominis

Question 10

Ground itch” or “dew itch” is a dermatitis caused by which of the following nematodes:

Answer 10

Necator americanus

Question 11

Long-standing and heavy infection can cause protein-losing enteropathy. Which parasite is responsible for this:

Answer 11

Strongyloides stercoralis

Question 12

Which of the following does not undergo heart- lung migration?

Answer 12

Whipworm

Question 13

Which of these drugs is used to treat protozoan infection?

Answer 13

Mebendazole

Question 14

Nocturnal pruritus is commonly seen in which of the following parasitic infections?

Answer 14

Enterobiasis

Question 15

All of the following are components of the kato thick technique except?

Answer 15

Orcein

Question 16

What is the parasite that caused the “Mystery” disease in Compostella valley?
I’m

Answer 16

Pudoc worm

Question 17

What is best way to distinguish Entamoeba histolytica from Entamoeba dispar infection?

Answer 17

PCR method

Question 18

Steatorrhea in Giardiasis is caused by what type of diarrhea?

Answer 18

Osmotic diarrhea

Question 19

In the Fischer indole synthesis, from what amino acid is converted in to indoleacetic acid which would finally be a derivative of skatole?

Answer 19

Tryptophan

Question 20

A young patient complains of epigastric pain and dyspnea. Upon observation the patient had yellowish sclerae. The patient’s stool was observed as clay-colored. What parasitic infection could have caused the patient’s condition?

Answer 20

Biliary ascariasis

Question 21

Blythe complains of vaginal pruritus after meeting with Ford and upon internal examination, red spots were seen on her cervix which could be likened to a strawberry. What could be the cause of her complaint?

Answer 21

Trichomonas vaginalis

Question 22

Pyrantel pamoate is always taken in tandem with albendazole during a helminthic infection. What is the reason for this?

Answer 22

It prevents the nematodes from migrating during treatment and is thus synergistic

Question 23

This drug’s mode of action is to inhibit protein synthesis by interacting with the DNA and causes helical DNA structure breakage once it diffuses in to the organism. Identify what drug is stated.

Answer 23

Metronidazole

Question 24

Which of the following diseases does not require an occult blood test?

Answer 24

Hemorrhoids

Question 25

A patient came in with painful bowel movements which upon macroscopic examination contained blood and mucus. Patient noted that the physician noted rectal prolapse on physical examination. What is the expected ova description if the cause was parasitic?

Answer 25

Barrel-shaped, thick-shelled and possess a pair of polar “plugs” at each end

Question 26

Respiratory distress due to nematode infection is most likely due to what action of the parasites?

Answer 26

Heart lung migration

Question 27

What part of the gastrointestinal tract is commonly affected by amebae?

Answer 27

Cecum

Question 28

A stool specimen has been examined one and a half hour after it has been passed. What will not be an expected finding?

Answer 28

Protozoan trophozoite

Question 29

A patient came in with complains of pruritus at night and restlessness at night. The physician requested a scotch tape method. The patient has just taken a bath ten minutes before coming in to the lab. What will be the most likely expected findings of the test?

Answer 29

Absence of Enterobius ova

Question 30

A patient has been requested for a occult blood test. The patient has taken a cocktail of ibuprofen and aspirin a few hours ago for the lightheadedness. What will be the expected results?

Answer 30

False positive

Question 31

A specimen was examined microscopically on DFS. 2 ova/HPO were seen for one length, what will be the laboratory report?

Answer 31

Few

Question 32

Pruritic dermatitis is caused by what action of the parasites?

Answer 32

Skin penetration

Question 33

Without the help of PCR for helping differentiate Entamoeba histolytica from Entamoeba hartmanni. What else could aid in the differentiation of the two species in the laboratory?

Answer 33

Check if the patient is manifesting symptoms of a protozoan infection

Question 34

Cindy received diarrheic stool, what procedure should she perform

Answer 34

Iodine and NSS

Question 35

Process of trophozoite to cyst

Answer 35

encystation

Question 36

What is the association between man and Entamoeba coli

Answer 36

Commensalism

Question 37

What form of an Ascaris lumbricoides is present in the lungs?

Answer 37

Parasite not present in sputum

Question 38

Which of the following preservatives to be employed in trichrome stain?

Answer 38

MIF

Question 39

How many nuclei are present in a mature cyst in an Entamoeba polecki

Answer 39

1

Question 40

Giardia duodenalis is the causative agent of beaver fever II. It is from beavers

Answer 40

Both true

Question 41

Which among the parasites is transmitted through sexual intercourse?

Answer 41

T. vaginalis and G. lamblia

Question 42

Polymyarian parasite

Answer 42

Ascaris lumbricoides

Question 43

Found in Cecum and colon and can bury itself in intestinal walls

Answer 43

Trichuris trichura

Question 44

Dissolve albuminous materials

Answer 44

40%HCl

Question 45

Color of rbc in unstained stool

Answer 45

Green

Question 46

Best recovery for coccidian

Answer 46

Sheather’s egg floatation

Question 47

Capillaria philippensis

Answer 47

Burborygmy

Question 48

Disease of acantamoeba

Answer 48

GAE

Question 49

E.histolytica

Answer 49

ALA

Question 50

Disintegration of eosinophils

Answer 50

Charcot-Leyden Crystals

Question 51

2 forms of amoeba

Answer 51

trophozoite and cyst

Question 52

20 ova / HPF

Answer 52

Many

Question 53

Parasite that is detected using Cellophane tape method

Answer 53

Both (pinworm and societal)

Question 54

Host that harbors a parasite that can infect someone but has no clinical symptoms

Answer 54

carrier

Question 55

Only ciliate to cause disease and largest protozoan parasite man ni

Answer 55

Balantidum coli

Question 56

seen in lakes and pools (also aircon, tap water, heating units)

Answer 56

naegleria fowleri

Question 57

Parasite that causes dew itch/ground itch

Answer 57

Necator Americanus

Question 58

Ga line up ang damu nga formed specimen, then may ara sa last watery specimen. Ano ang dapat himuon?

Answer 58

Perform the watery first, since trophoziote disintegrate after 30 mins

Question 59

All are advantages of formalin as fixative EXCEPT Easy to prepare Long shelf life Preserve specimen longer Used to recover trophozoite

Answer 59

Long shelf life

Question 60

All are recovered in concentration except Cyst Larvae Helminth eggs Trophozoite

Answer 60

Larvae and trophozoite

Question 61

Not a fixative Buffered glycerol CH2O Modified PVA SAF

Answer 61

Buffered glycerol

Question 62

Mistaken as yeast cells in direct fecal smear

Answer 62

RBC

Question 63

Which of the ff is a polymyarian type wherein somatic muscle arrangements are numerous and project well into the body cavity?

Answer 63

Ascaris

Question 64

Parasite nagbalik sa colon… strongyloides

Answer 64

Autoinfection