Parasite BOC Flashcards
374 Polyvinyl alcohol used in the preparation of permanently stained smears of fecal material:
MLS
ONLY
a concentrates eggs
b dissolves artifacts
serves as an adhesive
d enhances stain penetration
C
375 The method of choice to detect Acanthamoeba sp from corneal ulcer scrapings is:
MLS
ONLY
A.Novy, MacNeal and Nicolle (NNN) medium
B.culture on McCoy cells
C.direct exam
D.blood agar flooded with a 24-hour growth of E. coli
D
380 Multifocal brain lesion in AIDS patients is commonly caused by:
Toxoplasma gondii
b Pneumocystis jiroveci
C Cryptosporidium parvum
d Giardia lamblia
A
390 Protozoan cysts are found in a wet mount of sediment from ethyl-acetate concentrated material. ONLY The cysts are without peripheral chromatin on the nuclear membrane. Each cyst has 4 nuclei, and each nucleus has a large karyosome, which appears as a refractive dot. These oval cysts are most likely:
MLS
A.Endolimax nana
b Chilomastix mesnili
c Entamoeba histolytica
d Entamoeba hartmanni
A
391 The term “internal autoinfection” is generally used in referring to infections with: MIS
ONLY
a Ascaris lumbricoides
b Necator americanus
c Trichuris trichiura
dStrongyloides stercoralis
D
397 The examination of human feces is no help in the detection of:
MLS
ONLY
a Strongyloides stercoralis
b Entamoeba histolytica
C Echinococcus granulosus
d Ancylostoma duodenale
C
398 The causative agent of cysticercosis is:
A.Taenia solium
b Taenia saginata
c Ascaris lumbricoides
d Trichuris trichiura
A
399 Organisms that can be easily identified to the species level from the ova in fecal specimens include:
a Metagonimus yokogawai, Heterophyes heterophyes
b Taenia solium, Taenia saginata
Necator americanus, Ancylostoma duodenale
d Paragonimus westermani, Hymenolepis nana
D
401 When stool examination is negative, the preferred specimen for the diagnosis of paragonimiasis is:
MLS
ONLY
a bile drainage
b duodenal aspirate
C sputum
D rectal biopsy
C
