Protzoa

Question 1

Nature of Protozoa

Answer 1

Single called eukaryotes
0.01 - 0.05 mm
No cell wall
Very diverse

Question 2

Key protozoan infections:

Answer 2

Malaria
Toxoplasma
GI tract infections

Question 3

Significance and life cycle of plasmodium falciparum:

Answer 3

Bacteria that causes malaria

Life cycle:
1. Mosquito releases sporozoites
2. Sporozoites travel to liver to replicate
3. Merozoites released and infect erythrocytes
4. Remodelling of erythrocytes

Question 4

How to prevent/treat malaria:

Answer 4

Prevent:
Environmental measure (mosquito nets)
Drugs (Chloroquine)

Treat:
By using Chloroquinine:
- Effects DNA replication of bacteria

Question 5

2 examples of Protozoa responsible for GI tract infections:

Answer 5

Cryptosporidium
Entamoeba

Question 6

Features of toxoplasma:

Answer 6

Can infect multiple species
Forms cyst like structures that are difficult to treat
Rapid asexual cycle in intermediate hosts

Question 7

Symptoms of toxoplasma:

Answer 7

Psychiatric disorders
Slow reflexes
Flu like symptoms
Can be asymptomatic or fatal
Can affect foetus if pregnant woman is infected

Question 8

How do Merozoites effect blood cells after 48 hours:

Answer 8

Infected red cells rupture releasing more Merozoites.
Degradation of haemoglobin

Question 9

Symptoms of malaria:

Answer 9

Similar to flu
High temp/fever
Temp. Fluctuation