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Parasitology I

Total questions: 30

Worksheet time: 32mins

Name
Class
Date
1.

What are the major phyla of helminths that cause parasitic diseases of humans?

1. nematodes

2. cesodes

3. platyhelminths

a)

1 only

b)

1 & 2

c)

1 & 3

d)

3 only

e)

1, 2 & 3

2.

Which of the following is an example of a helminth with a simple human gut lifecycle and fecal-oral transmission?

a)

Ascaris lumbricoides

b)

Anclyostoma duodenale

c)

Wuchereria bancrofti

d)

Enterobium vermicularis

e)

Taenia solium

3.

Even though Ascaris lumbricoides is a gut helminth, the larvae migrate through which part of the human body?

a)

skin

b)

brain

c)

lungs

d)

kidneys

e)

liver

4.

Which of the following helminths gives birth to live young?

a)

Ascaris lumbricoides

b)

Taenia solium

c)

Enterobius vermicularis

d)

Wuchereria bancrofti

e)

Ancylostoma duodenale

5.

Which of the following helminths is found only in circulatory system (ie. does not have a gut stage)?

a)

Schistosoma mansoni

b)

Wuchereria bancrofti

c)

   Enterobius vermicularis

d)

Taenia solium

e)

Echinococcus spp.

6.

Miracidia are a life stage of which parasites?

a)

protozoa

b)

parasitic snails

c)

Enterobius vermicularis

d)

Taenia solium

e)

Schostosoma spp.

7.

A man is holidaying in a tropical location and goes swimming in a lake near to his accommodation in a small village.  The next day he notices he has an itchy skin rash and raised red bumps (papules) on his legs and feet.  Which of the following is likely infecting him?

a)

Ascaris lumbricoides

b)

Schistosoma spp.

c)

Ancylostoma spp.

d)

Enterobius vermicularis

e)

Wuchereria bancrofti

8.

Eating under-cooked beef can result in infection with which of the following parasites?

a)

Taenia saginata

b)

Schistosoma hematobium

c)

Enterobius vermicularis

d)

Wuchereria bancrofti

e)

Brugia malayi

9.

T or F. The intermediate host of a parasite is the host where the sexually mature, adult stage of the parasite is found

(a)  

10.

T or F. Diagnosis of the majority of helminths is generally via microscopy of eggs (and sometimes larvae) in faeces

(a)  

11.

What are the medically relevant parasite groups?

1. helminths

2. protozoa

3. arthropods

a)

1, 2 & 3

b)

1 only

c)

1 & 2

d)

3 only

e)

2 & 3

12.

How to recognise a parasite?

a)

morphology of parasite

b)

body site infected

c)

symptoms of patient

d)

patient history

e)

specific tests

13.

Select all that are factors of parasitic infections

a)

geographical location

b)

hygiene standards

c)

immunological status

d)

age

e)

political views

14.

What are the two main groups of helminths?

a)

roundworms (nematodes)

b)

flatworms

c)

arthropods

d)

aracnids

15.

Select all that is true about helminths

a)

linked to low socioeconomic conditions and poor sanitation

b)

intermedial host - larval stages

c)

definitive host - sexually mature adult forms

d)

found in many body site

e)

bug like parasites

16.

Select all that are true about nematodes

a)

round, unsegmented worms

b)

primarily in blood and gut

c)

diagnosis - eggs/larvae in faeces

d)

transmitted via faecal - oral route contamination

e)

males have larger, sexual reproduction

17.

Which are the important nematodes (soil-transmitted helminths)?

a)

Ancylostoma spp. (Hookworm)

b)

Ascaris lumbricoides

c)

Trichuris trichiura

d)

Enterobius vermicularis

18.

What are the symptoms of soil-transmitted helminths?

a)

malnutrition

b)

growth stunting

c)

mental and physical development in children

d)

loss of vision

19.

What is the correct order for the mode of transmission of nematodes

1. transdermal

2. vector-borne

3. faecal-oral

a)

3, 1, 2

b)

1, 2, 3

c)

2, 3, 1

d)

2, 1, 3

20.

Select all that is correct about Enterobius vermicularis

a)

pinworm infection

b)

eggs are easily dislodged from perianal folds

c)

disseminated by air currents

d)

larave hatch around anus and retro-infect intestine

e)

direct to gut

21.

Select all that are correct about ascaris (roundworm)

a)

faecal-oral transmission

b)

cause malnutrition & bowel obstruction

c)

gut -> lungs -> gut

d)

migrate through gut wall and travel through lungs

e)

are not able develop into adults

22.

Select all that are correct about hookworms

a)

transdermal stage

b)

also known as Ancylostoma duodenale

c)

circulate in blood and travel from heart to lungs

d)

transmitted by birds

e)

skin -> blood -> heart -> lungs -> gut

23.

Select all that are correct about Wuchcheria bancrofti

a)

larvae transmitted by vector-born

b)

filariasis/elephantiasis disease

c)

transmitted by mosquitoes

blood -> lymph

d)

inflammation of lymphatics

e)

no eggs

24.

T or F. Cestodes are a type of flatworm

(a)  

25.

Select all that are correct about cestodes

a)

no mouth, nutrients are absorbed

b)

strobila (tape) is the segments (proglottids)

c)

each proglottid is self sufficient

d)

Taenia spp. & Echinococcus spp

e)

primarily in liver

26.

Morphological diagnosis is based on?

a)

scolex shape

b)

proglottid numbers

c)

proglottid morphology

d)

size of mouth

27.

Select all that are true about trematodes

a)

flatworms, oral and ventral suckers, blood feeders

b)

asexual reproduction except Schistosoma (sexually)

c)

Schistosoma spp. , Frasciola spp. , Fasciolopsis, Opisthorchis

d)

found in blood, gut and tissue

e)

usually 3 morphological stages

28.

What is the correct order for the life cycle of trematodes

1. egg

2. sporocyst

3. cercaria

4. adult

5. redia

6. miracidium

a)

4, 1, 6, 2, 5, 3

b)

3, 4, 2, 5, 6, 1

c)

1, 4, 3, 5, 6, 2

d)

1, 2, 5, 6, 3, 4

29.

Trematodes include

a)

intestinal flukes

b)

liver flukes

c)

lung flukes

d)

blood flukes

e)

heart flukes

30.

What are the acute infection signs and symptoms of Schistosoma

a)

skin rashes / papules "swimmers itch"

b)

fever, chills, muscle aches, abdominal pain

c)

eggs shed in faeces or urine

d)

adults coat themselves in host proteins - use to evade host immune system

e)

adult worms can only live for a few years

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