Intro to parasites

Question 1

What are the main groups of parasites?

Answer 1

Protozoa
Helminths
Arthropods

Question 2

Describe the lifecycle of a protozoan infection.

Answer 2

Malaria:

• Sporozites injected under skin by mosquito
• Travel through blood to liver
• Mature to Merozoites in the liver and reenter circulation
• Invade RBC, multiply and lyse cells
• Sexual forms taken up by mosquitoes occurs during feeding

Question 3

Describe the lifecycle of a helminth.

Answer 3

Nematodes:

• Eggs are ingested and hatch in the intestine
• Larvae are carried by circulation to lungs
• Swallowed again and small worms occupy the samll intestine

Question 4

Describe arthropod stuff.

Answer 4

Midges n that.

Question 5

Give an example of a disease caused by an enteric parasite.

Answer 5

Amoebic Dysentery.

Question 6

Give an example of a disease caused by a blood-borne parasite.

Answer 6

Malaria.