Cairo University
Date --/--/2013
Time allowed: 1hour
Faculty of Medicine
Mid–year Exam (trial)
Parasitology
The examination includes the following : (Total:8pages, total 20 marks)
QI : MCQs (20MCQs)
(5marks)
QII : 3 Cases
(9 marks)
QIII: Give reason
(3marks)
QIV: True and False question
(3 marks)
All the questions should be answered in this sheet
Question I M.C.Q.s
1-Infection with Trichostrongylus occurs through:
a-Ingestion of embryonated eggs
b-Ingestion of rhabditiform larvae
c-Ingestion of filariform larvae
d-Penetration of skin by filariform larvae
2- Anaemia of Diphyllobothrium latum is due to:
a-iron deficiency
b-bone marrow depression
c- vit. B12 deficiency
d- blood loss
3- The commonest helminthic infection in children is
a- Enterobius
b- Fasciola
c- Taenia saginata
d- Heterophyes
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4 -Ingestion of eggs of Multiceps results in:
a- cysticercosis
b- coenurus cyst
c- hydatid cyst
d- sparganosis
5- Callabar swelling of Loa loa
a- is usually found in the eyes
b- causes blindness
c- is transient
d- contains adults and microfilariae
6-The pathogenecity of Wuchereria is due to:
a- circulating microfilariae
b- death of microfilaria
c- adults worms in lymph vessels
d- nocturnal periodicity
7-Dysentery is a manifestation of:
a- Ascariasis
c- Trichuriasis
b- Fascioliasis
d- Enterobiasis
8- Visceral larva migrans occurs by:
a- Ingestion of larva of non-human nematodes
b- Penetration of the skin by larva of Ancylostoma of dogs
c- Penetration of the skin by larva of Ascaris of dogs
d- Ingestion of food containing eggs of non-human nematodes
9- The following infection is geohelminthic
a- Fascioliasis
b- Paragonimiasis
c -Ascariasis
d- Giardiasis
10-Chyluria is more common in:
a-Urinary schistosomiasis
b-Wuchereria bancrofti elephantiasis
c-Brugia malayi elephantiasis
d-Enterobius infection of male patients
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11- In Echinococcus granulosus man act as:
a- definitive host
b- reservoir host
c- intermediate host
d- paratenic host
12-Man is infected with fascioliasis by eating contaminated:
a- raw liver
b- raw meat
c- raw fish
d- raw vegetables
13- Cysticercosis result from ingestion of
a- eggs of Taenia saginata
b- eggs of Taenia solium
c- cysticercus cellulosae
d- cysticercus bovis
14- Opportunistic parasite :
a-lives outside the body
b-lives inside the body
c-produce disease in immunodeficient patients only
d-has free or parasitic existence
15- The snail intermediate host of Heterophyes is:
a- Lymnaea cailliaudi
b- Lymnaea truncatula
c- Semisulcospira
d- Pirenella conica
16- Man is infected with Dracuculus medinensis by:
a- walking bare footed
b- coming in contact with water containing cyclops
c- drinking water containing cyclops
d- auto-infection
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17-Halzoun:
a-is caused by linguatula serrata only
b-is caused by Fasciola hepatica metacercaria
c-is caused by eating raw liver of sheep and goat
d-is prevented by proper washing of vegetables
18-The microfilariae of Wuchereria bancrofti inside the vector:
a- increase in number
b-increase in size
c- increase in number and size
d- remain unchanged
19- Appendicitis may be caused by the following parasitic infection:
a-Heterophyiasis
b-Hymenolepiasis
c-Ancylostomiasis
d-Taeniasis
20-Parasitism is permanent association between 2organisms in which
a- both benefit
b- one partner benefits and the other is unaffected
c- one partner benefits and the other is harmed
d- none of the above
QuestionII (Cases)
Case I (4marks)
A child aged 12 years old from fayoum complained from weakness,
dyspnea, tachycardia and palpitations ,oedema of lower limbs. There is
severe anaemia Stool analysis reveals the following egg
a –What is your provisional diagnosis?
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…………………………………………………..
(1Mark)
b- How the patient gets infected and what is the infective stage?
……………………………………………………………
(1 mark)
c- What is the cause of anaemia?
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………
(1 mark)
d-How to prevent such disease
………………………………………………………………………………
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( 1mark)
Case II (3marks)
A female aged 35 years old complained of sudden fracture of the leg. The X
ray reveals the lesion shown in the figure
a-what is your provisional diagnosis
(1/2 mark)
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…………………………………………………………….
b- How man gets infected
(1/2mark)
……………………………………………………………………..
c- Mention 2 other sites of such infection
(1mark)
…………………………………………………………………..
d- Mention 2 other methods of diagnosis of this parasitic infection
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………… (1mark)
Case III ( 2 marks)
A farmer aged 45 years complained of oedema of lower limbs and distension
of the abdomen. On clinical examination there was pulmonary hypertension.
He gives history of passing mucus and blood in stool many years ago
a -What is your suspected diagnosis
……………………………………………………. (1/2mark)
b-Explain the cause of pulmonary hypertension
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(1.5 mark)
Question III (3 marks)
Give reason for:
1-Persistent of infection with strongyloidiasis
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………
(1mark)
2-Well water must be filtered before consumption
………………………………………………………………………………
………………………………………………………………………………
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(1mark)
3-The invalidity of stool examination in suspected cases of fascioliasis
………………………………………………………………………………
………………………………………………………………………………
……………………………………………………………………(1mark)
Question IV (3marks)
Mark True (T) or False (F) and correct the false statement
1-Man is infected by Heterophyes by eating unwashed green salad (…..)
………………………………………………………………………………...
2- Microfilaria of Brugia malayi shows diurnal periodicity
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(…….)
……………………………………………………………………………….
3-Trichinella spiralis could be complicated by rectal prolapsed
(………)
………………………………………………………………………………
Best wishes
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