Changes in the malarial parasite, Biology

The parasite completes a part of its life histroy in man in two stages.

They are : a) Pre-Erythrocytic cycle. b) Erythrocytic cycle.
1. When an infected female Anopheles mosquito bites, the parasite enters our blood.
At this point of time the parasite is in a stage of its life history called sporozoit.
2. The sporozoits spend about 30 minutes in blood and enter the liver cells. They feed on the contents of liver cell and fill the entire cell. This stage is called crypto-schizont stage.
3. Schizonts reproduce asexually to produce daughter cells called crypto- merozoits.
The liver cell ruptures and merozoits are released into blood.
4. As these changes occur in the liver cells, this stage is called Pre-Erythrocytic cycle. This phase of the life cycle is for 7 to 17 days. This cycle ends when the parasite enters the red blood cell.
5. In the red blood cell, the parasite feeds on the contents of red blood cell and grows in size. They are called schizonts.
6. The schizonts divide repeatedly and produce 6 to 2 merozoits. The red blood cell reuptures and releases the merozoits into the blood. The merozoits again attack new red blood cells and produce more number of merozoits. This phase of the cycle is called Erythrocytic cycle.
7. The rupture of the red blood cell and release of the parasite into the blood is associated with chills and fever known as malarial fever.

1232_changes in the malarial parasite.png

Posted Date: 8/29/2012 7:42:19 AM | Location : United States

Related Discussions:- Changes in the malarial parasite, Assignment Help, Ask Question on Changes in the malarial parasite, Get Answer, Expert's Help, Changes in the malarial parasite Discussions

Write discussion on Changes in the malarial parasite
Your posts are moderated
Related Questions
Q. Explain Cardiac calcification? Pericardial Calcium is most dense in the atrioventricular grooves and is seen as thick oblique circles or arcs of calcification. From th

Advantages of Panoramic X-Ray  Opposing landmarks are easily identified  The vertical height of the bone initialy can be assessed  The procedure is performed with conveni

Q.How is it produced and what is the function of cholecystokin in the digestive process? The fat level of the chyme detected in the duodenum stimulates the secretion of cholecy

Zooflagellates – Protozoan Zooflagellates are heterotrophs that are free living, commensals or symbiotic or parasitic in other animals. A number of species eg. Trichonynzpha a

Q. What are risk factors for diseases? The Risk factors for a disease are everything that contributes to increase the risk of the disease to appear. For example, for most cardi

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Micro Debrider: long , it's tip as hand spreader, not smooth and resemble H file. -    These instruments have a hedstrom cutting configuration with a standard 0.02 taper and

What is the structural representation of a carboxyl group? Carboxyl groups have a carbon attached to single hydroxyl group by a simple bond and to one oxygen by a double bond.

Define the effect of Vitamins (A, D, K and B-Complex) on athletes? Vitamins A, D and K have been found to have no ergogenic effects. Ingesting large doses of these vitamins hav

Q. Show How Adaptation affecting taste quality? Adaptation - A low concentration solution will not give any sensation after tasting a higher concentration solution due to the a