Malaria

Question 1

Which plasmodium species are responsible for relapsing malaria

Answer 1

P. ovale

P. vivax

Question 2

Which blood stage are you unlikely to see in a blood films of P. falciparum?

Answer 2

Schizonts - due to sequestration in blood vessels

Question 3

On which plasmodium species will you see Maurer’s clefts

Answer 3

P. falciparum

Question 4

What are the 5 plasmodium species that affect humans

Answer 4

P. falciparum 
P. ovale
P. vivax
P. malariae 
P. knowlesi

Question 5

What is a hemozoin (heme crystal)?

Answer 5

A waste product produced by plasmodium species from the digestion of hemoglobin

Question 6

Where does the sexual stage of plasmodium occur?

Answer 6

Within the midgut of the mosquito

Question 7

In what plasmodium species will you find ‘band forms’?

Answer 7

P. malariae

Question 8

What are ‘ring forms’ also known as?

Answer 8

Trophozoites

Question 9

What is the infective stage within the mosquito salivary glands

Answer 9

Sporozoites

Question 10

How many people die from malaria each year?

Answer 10

~600 000 deaths according to WHO

Question 11

How many cases of malaria are there a year?

Answer 11

~198 million

Question 12

Which mosquito species transmits malaria?

Answer 12

Anopheles

Question 13

What is released when schizonts in the liver rupture?

Answer 13

Merozoites which then invade red blood cells (RBCs)

Question 14

Where are oocysts found?

Answer 14

On the outside wall of the mosquito midgut

Question 15

Which 2 species cause enlarged RBCs?

Answer 15

P. Ovale

P. Vivax

Question 16

In which plasmodium species are you most 
likely to see the following ring forms:
Multiple invasion
Accole forms
Double chromatin dots

Answer 16

P. falciparum

Question 17

How many merozoites are there in a mature schizont of P. vivax?

Answer 17

12-24