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Flashcards in Introduction to Parasites Deck (22):
1

Define a parasite?

- Organisms that live in the expense of another

2

Give an example of a protozoa

Malaria (plasmodium falciparum)

3

What are injected under the skin initially by the mosquito?

Sporozoites

4

Where do sporozoites mature?

Liver

5

What do they re enter the circulation as?

Merozoites

6

What cells do merozoites use to multiply and what do they cause these cells to do?

- Red blood cells
- Destroy them

7

Once mature, how are these merozoites transmitted to other human?

Mosquito bites infected human

8

What causes amoebic dysentery?

Entamoeba Hystolytica

9

What is a typical symptom of amoebic dysentery?

Diarrhoea with blood and pus

10

What can be found in the stool samples of infected individuals with amoebic dysentery?

Protozoal cysts

11

What is special about leishmaniasis with regards to the pathogen that causes it?

It can be caused by many different parasites

12

What does cutaneous leishmaniasis cause?

Skin/mucousal ulceration

13

What does visceral leishmaniasis cause?

- Fever
- Weight loss
- Hepato-splenomegaly

14

What are the three types of helminths?

- Nematoda
- Cestodes
- Trematoda

15

What's an example of a nematode infection?

Ascaris Lumbricoides

16

How is ascaris lumbricoides contracted?

Ingestion of eggs

17

What path does ascaris lumbricoides take to mature?

- Embryos hatch and pass through lungs
- Enter stomach and move to small intestine

18

What does ascaris lumbricoides have the potential to cause?

Loefller's Syndrome

19

What is Loefller's syndrome?

Accumulation of eosinophils in the lungs

20

What is an example of a condition caused by trematodes?

Schistosomiasis

21

What is the intermediate host of miracidia (immature pathogen of schistosomiasis)

Fresh water snails

22

How do the mature forms enter the human body?

Can penetrate the skin