Parasites

Question 1

Name three classes of parasites.

Answer 1

Helminths, arthropods and protozoa.

Question 2

Which type of parasite is a one cell organism, can be free living or parasitic, and multiples in humans.

Answer 2

Protozea.

Question 3

How is protozoa spread if it lives in the human intestine.

Answer 3

Faecal- oral route.

Question 4

How is protozoa spread when it is found in the blood or tissue?

Answer 4

An arthropod vector.

Question 5

What parasite is malaria caused by? And which of these is the most common?

Answer 5

Plasmodium.

P. Falciparum

Question 6

What type of mosquito is the vector for plasmodium?

Answer 6

ANOPHELES mosquito.

Question 7

What type of blood films show malaria parasites.

Answer 7

Thick and thin blood films.

Question 8

What does the anopheles mosquito inject under in the skin in the spread of malaria?

Answer 8

Sporozoites.

Question 9

Where do sporozoites mature? And what do they become?

Answer 9

Liver - Merozoites.

Question 10

What parasite is amoebic dysentry cause by?

Answer 10

Entamoeba histolytica. - protozoa.

Question 11

What does amoebic dystentry cause?

Answer 11

Cysts in stools
Liver abscess
Infections.

Question 12

What can cause cutaneous (skin) and muco-cutaneous (mucosal ulceration) problems?

Answer 12

Leishmaniasis.

Question 13

What does visceral leishmaniasis cause?

Answer 13

fever, weight loss and hepato-splenomegaly.

Question 14

What is Leishmaniasis caused by?

Answer 14

Sandfly bites.

Question 15

Name the three types of helminths.

Answer 15

Nematodes - round worms
Cestodes - tape worms
Trematodes - Flat worms

Question 16

What causes pinworms found in bum?

Answer 16

Nematode - enterobiasis .

Question 17

Where does the nematode ascarislumbricoides affect?

Answer 17

Eggs are injested and go to the intestine. Larvae moves to lungs. They develop and inhabit in small intestine.

Question 18

Name two cestodes picked up by meat.

Answer 18

saginata - found in beef

Solium - found in pork.

Question 19

What is the cestode echinococcus found in?

Answer 19

dog, fox, wolf faeces.

Question 20

What is the most severe type of schistosomiasis called?

Answer 20

Japonicum.

Question 21

in the process of schistosomiasis, what goes into water by urine by faeces - and injects into snails?

Answer 21

Miracadia.

Question 22

Miracadia comes out of snail as what?

Answer 22

Cercaria.

Question 23

where are schistosomes made?

Answer 23

Liver.

Question 24

What does schistosomiasis cause?

Answer 24

Urine in blood.

Urinary cancer.

Question 25

How can parasites be diagnosed?

Answer 25

1 - identify parasites in tissue / excretion
2 - ova can be seen in faeces by microscopy.
3- helminths are associated with eosinophilia and elevated IgE