Protozoans

Question 1

Shape of ulcer formation in amoebiasis

Answer 1

Flask-shaped

Question 2

Pathogenic form of Entamoeba histolytica

Answer 2

Trophozoite

Question 3

Enzyme secreted by trophozoite of E. histolytica

Answer 3

Hyaluronidase

Question 4

DOC of amoebiasis

Answer 4

Metronidazole

acts intra/extraintestinal

Question 5

Causes anchovy sauce-like abscess in the liver

Answer 5

Amoebiasis

Question 6

Entamoeba dispar
E. hartmanni
E. coli
Endolimax nana
Iodamoeba butschlii

Answer 6

Commensal amoeba

Question 7

What is seen in pathologic amoeba, not seen in commensal?

Answer 7

RBCs inside the trophozoite

Question 8

Species differentiation in amoeba using 1g of feces

Answer 8

FECT

Question 9

Free-living pathogenic amoeba

Answer 9

Acanthamoeba spp.

Naegleria fowleri

Question 10

Condition where contact-lens user gets infected by acanthamoeba

Answer 10

Amebic keratitis

Question 11

Causes primary amebic encephalitis

Answer 11

Naegleria fowleri

Question 12

MOT of Naegleria fowleri

Answer 12

Intranasal and oral

Question 13

Infective stage of Entamoeba histolytica

Answer 13

Cyst

Question 14

Tx for cyst carrier state of amebiasis

Answer 14

Diloxanide furoate

Question 15

3 parasitic infx treated by Metronidazole

Answer 15

Trichomoniasis
Giardiasis
Amoebiasis

Question 16

Motility of Giardia lamblia

Answer 16

Falling-leaf motility

Question 17

Flagellate that causes steatorrhea; most common cause of backpacker’s diarrhea

Answer 17

Giardia lamblia

Question 18

Opportunistic intestinal protozoa causing severe life-threatening diarrhea if CD4

Answer 18

Cryptosporidium parvum

Question 19

Punctate granulations present in RBCs infected by P. ovale and vivax

Answer 19

Schuffner dots

Question 20

Coarse granulations present in RBC invaded by P. falciparum

Answer 20

Maurer dots

Question 21

Fine dots present in RBC invaded by P. malariae

Answer 21

Ziemann dots

Question 22

Antimalarial used for hypnozoite eradication

Answer 22

Primaquine

Question 23

Antimalarial for chloroquine-resistant forms

Answer 23

Mefloquine + Doxycycline

Question 24

DOC for pregnant pts w/ malaria

Answer 24

Mefloquine

Question 25

Definitive host of Toxoplasma gondii

Answer 25

Cats

Question 26

Dx test for toxoplasmosis

Answer 26

anti-toxoplasma IgM antibody

Question 27

Tx for Toxoplasmosis

Answer 27

Sulfadiazine + pyrimethamine

Question 28

Most frequently and severely affected tissue in trypanosomiasis

Answer 28

Cardiac muscle

Question 29

Periorbital edema in Chagas dse

Answer 29

Romaña’s sign

Question 30

Protozoan manifesting with remarkable antigenic variation responsible for intermittent fever

Answer 30

Trypanosoma brucei gambiense

Trypanosoma brucei rhodesiense

Question 31

Type of encephalitis in African sleeping sickness

Answer 31

Demyelinating encephalitis

Question 32

Enlargement of post cervical LN due to trypanosomiasis

Answer 32

Winterbottom’s sign

Question 33

Hyperesthesia in trypanosomiasis

Answer 33

Kerandel’s sign

Question 34

Plasma cells with cytoplasmic Ig globules in trypanosomal encephalitis

Answer 34

Mott cells

Question 35

Tx for lymphocutaneous trypanosomiasis

Answer 35

Suramin

Question 36

Tx for cerebral trypanosomiasis

Answer 36

Melasoprol

Question 37

Tx for West Gambian Trypanosomiasis

Answer 37

Eflornithine + Pentamidine

Question 38

Most common organism causing red tide in the Phils

Answer 38

Pyrodrium bahamense var. compressum

Question 39

Organisms causing keratitis in contact-lens users

Answer 39

Acanthamoeba castellani

Pseudomonas aeruginosa

Question 40

Tx for leishmaniasis

Answer 40

Sodium stibogluconate