Parasitic-protozoa-malaria - Parasitic protozoa malaria...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Parasitic protozoa - malaria Malaria Malaria . The malarial parasite, Plasmodium , is another protozoan which lives in the blood stream of humans but, unlike the trypanosomes, the parasites enter the red cells and feed on their cytoplasm. The Plasmodium divides repeatedly inside the red cell which eventually bursts, liberating dozens of new parasites into the circulation. Each of these can invade another red cell and undergo the same cycle. When thousands of red cells all burst simultaneously, releasing parasites and their accumulated waste products, the host suffers from a fever. This cycle of feeding, division and release is repeated regularly, so the fever occurs every 48 or 72 hours, according to which of the four species of Plasmodium has become established. The parasites are transmitted from person to person by female mosquitoes of the genus Anopheles , which pierce the skin with their sharp, tubular mouthparts and feed on the blood which they suck from the superficial skin capillaries (see Insects, Mosquito). If the blood so taken contains the malarial parasites, these undergo a complicated series of
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/29/2011 for the course BIO 218 taught by Professor Young during the Fall '11 term at BYU.

Page1 / 2

Parasitic-protozoa-malaria - Parasitic protozoa malaria...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online