امتحان parasitology 01

MCQs:
Circle the FALSE answer:
1. Ingestion of the infective stage is the method of infection with:
a. Ascaris Lumbricoides.
b. Trichinella spiralis.
c. Trichuris trichiura.
d. Enterobius vermicularis.
e. Necator americanus.

2. Finding eggs in the stools is the method of diagnosis of infection with with:
a.Trichuris trichiura.
b. Ascaris lumbricoides.
c. Stronglyloides stercoralis.
d. Necator Americanus.
e. Ancylostoma duodenale.

3. Entrobius vermicularis egg is:
a. colorless.
b.flattened on one side and convex on the other.
c. measuring about 50 X 50 um.
d. Found usually on the perianal skin.
e. Contains a segmented ovum usually with 4 or 8 blastomers.



4.Ascaris lumbrecoides:
A.It is the largest intestinal round worm.
B.Female produces 200,00 egg per day.
C.The mouth has lips.
D.The filariform larva inside the egg is the infective stage.
E.In sever infection, the larvae may be found in the sputum.

5.Larva migration and development in the lungs occur in infection with:
A.Ascaris lumbricoides.
B.Necator americanus.
C.Strongylodies stercoralis.
D.Ancylostoma duodenale.
E.Enterobius vermicularis.

6.Ancylostoma duodenale:
A:It is parasite of the small intestline.
B.Its larva must develop in moist soil.
C.A severe infection may cause anaemia.
D.Its infective stage is the second stage larva.
E.Its larvae migrate in the lungs.

7.Strongyloides stercoralis:
A.the adult is found in the mucosa of the upper part of the small intestline:
B.It can cause autofection.
C.It has parasite and free-living life -cycles.
D.Female, but no males, are seen in the intestline.
E.It infect man by eating insufficiently cooked meat.

8.Parasite of the small intestine include:
A.A scaris lumbricoides.
B.Strongyloides stercoralis
C.Enterobius vermicularis.
D.Necator americanus.
E.Ancylostoma duodenale.

9.Whip worm egg:
A.Is passed in the faeces containing an unsegmented ovum.
B.Develops in the soil.
C.Is infective when it contains larva 1.
D.Is often found in the stool saline preparations.
E.Is colourless and transparent.

10.Trichinella spiralis:
A.Infective form is the encysted larva in muscles of pigs and rats.
B.Infective may be diagnosed by demonstrations of encysted larvae in muscle biopsy.
C.Adult inhabits the large intestine.
D.Adult and larva are found in the same host.
E.Infection can be diagnosed by serological methods.

11.Enterobius vermiculuris:
A.The adult characterised by a lar expansion.
B.The ova containing L3 is infective stage.
C.It has direct life cycle.
D.It's diagnosed by scotch tape technique.
E.The ova containing L2 is infective stage.

12.Parasites with direct life-cycle include:
A.Ascaris lumbricoides.
B.Enterobius vermicularis.
C.Trichiuris trichiura.
D.Onchocerca volvulus.
E.Hookworms.

13.The egg of Ancylostoma duodenale:
A.Is oval-shaped.
B.Has a colourless, transparent shell.
C.Contains a segmented ovum.
D.Has a clear space between the ovum and the egg shell.
E.Is flattened on one side and convex on the other.

14. The eggs of Ascaris lumbricoides:
A.  Are often found in unconcentrated stool preparations.
B.  May be unfertilized.
C.  Have albumin coat.
D.  May be found in the sputum in severe infections.
E.  Are infective when they contain second stage larva.

15. Clinical manifestations of Onchocerciasis include:
A.  Skin itch and scratching.
B.  Hypopigmentation of the skin.
C.  Subcutaneous nodules.
D.  Hydrocele.
E.  Blindness.     

Q2: Write short notes on each of the following:
1. Lab diagnosis of Ascaris Lumbricoides.
2. Lab diagnosis of Entrobius vermicularis.