Practical 1: plasmodium Flashcards

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1
Q

What are the four different blood stages of plasmodium?

A

Ring, trophozoite, schizont, gametocyte

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2
Q

What are the features of ring stage parasites?

A

small ring-like appearance with small red chromatin dot and clear vacuole

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3
Q

What are the features of the trophozoite form?

A

Larger than ring stage, brown dots of haemozoin pigment visible

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4
Q

What are the features of schizonts?

A

Have an appearance like a bunch of grapes and more than one chromatin dot because nuclear division has begun

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5
Q

What are the features of gametocytes?

A

Dense black granules visible, often exflagellating from the RBC

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6
Q

What induces exflagellation of gametes?

A

Uptake into mosquito gut so lower temperature and exposure to xanthurenic acid

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7
Q

What happens to the male gametes before exflagellation?

A

They undergo 3 rounds of DNA replication within 10 minutes to produce 8 microgametes.

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8
Q

What is an exflagellation centre?

A

The cluster of red blood cells bound by exflagellating gametes.

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