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