Reference no: EM132794669

1. Morphologic characteristics used to identify intestinal amebas include all of these except

A. Shape

B. Size

C. Number of nucleus

D. Presence or absence of peripheral chromatin

2. The specimen of choice for the diagnosis of intestinal parasite is

A. Blood

B. Feces

C. Sputum

D. urine

3. In which of the following life cycle may auto infection of human occur?

A. Trichurina trichiura

B. giardia lamblia

C. strongyloides stercoralis

D. iodamoeba butschlii

4. All these are large multicellular organisms that can be either free living or parasitic in nature and classified as helminthes except

A. Cestode

B. Nematoda

C. Entamoeba

D. Trematoda

5. Trophozoites does not survive too long and motility is of diagnostic importance in parasitology therefore if preservation is not possible specimen should be examined

A. Within 10 min

B. Within 60 min

C. Within 48 hours

D. Within 72 hours

6. Single sometimes fragmented body of densely packed DNA rich nuclear chromatin within the nucleus of protozoa is the definition of

A. Karysome

B. Chromatin granules

C. Cytoplasm

D. Choreoathetoid body

7. Non pathogenic amoebas include all these except

A. Entamoeba coli

B. Entamoeba histolytic

C. Endolimax nana

D. Iodamoeba butschlii

8. In order to rule out intestinal parasites especially protozoa the recommendation is to collect

A. The first stool in the morning for 3 consecutive days

B. A minimum of 3 stool sample each collected at least 2 days after the previous

C. At least 3 stools after administration of a barium enama

D. A minimum of 3 stool after administration of an antibiotic such as tetracycline

9. Taenia solium and taenia saginata proglottids can be differentiated by

A. Number of uterine branches in mature proglottids

B. Location of uterine pore

C. Ability to take up stain

D. Color of proglottids

10.The stage of strongyloides stercoralis most commonly identified in stool is the

A. Egg

B. Filariform larva

C. Rhabditiform larva

D. Adult worm

11.Eggs of the cestode below identified from the stool of a five year old boy demonstrated round to slightly oval measuring 50 um * 45um and has two membranes with the inner membrane having 6 polar filaments that extended between the oncosphere and the outer shell and 6 booklets inside the inner membrane is

A. Hymenolepis nana

B. Ascaris lumbricoides

C. Taenia

D. Hymenolepis diminuta

12. Size an important characteristic for identification of parasites is most accurately determined by

A. Comparison of unknown parasites with other known parasites found in the specimen.

B. Comparison of unknown parasites with a artifacts such as pollen grains

C. Measuring the unknown parasites with a calibrated ocular micrometer

D. Measuring the unknown parasites using the edge of the coverslip on the microscope slide,

13. You receive a stool sample in the laboratory with a request to examine it for cryptosporidium sp. Which of the following test would be most helpful in the diagnosis of cryptosporidiosis?

A. Trichrome stain

B. Modified kinyoun's acid fast stain

C. Gram stain

D. Methylene blue stain

14.The nonmotile stage in the life of many protozoa which is usually the infective stage responsible for transmission of infection is the

A. Cyst stage

B. Larval stage

C. Trophozoite stage

D. Adult stage

15. Based on their life cycle a parasite capable of transmitting itself directly from man to man therefore requires

A. One intermediate host

B. No intermediate hots

C. Four intermediate hosts

D. Tow intermediate hosts