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 about Individual consciousness? The physical brain is not a source of experience as some current neuroscientists now mistakenly believe. While areas of the brain are

Explain Foaming Properties of proteins To understand the foaming properties of proteins, we need to know some basic aspects of foam foods. Foam foods are usually colloidal disp

Define needs for Nutritional Relief Programme and Interventions? A general feeding programme is required during first stage when the affected population does not have sufficien

Outline the importance of buffer systems in the human body. In addition, describe the main biological buffer systems and how they function.

You are soon to be registered as a nurse and have applied to work in a unit where you will be caring for a diverse range of clients with medical and surgical complexities. You know

Name some emulsifiers which are present in nature? There are many emulsifiers which are present in nature such as phospholipids e.g. lectin which is present in egg yolk which a

Q. Explain about Ecological species concept? The ecological species concept: This identifies a species as a population that occupies a distinct ecological niche, whence its rep

diagram of phyllum protozoa

Bacteria called extremophiles are able to grow in hot springs such as Old Faithful at Yellowstone National Park in Wyoming. Do you think that the DNA of extremophiles would have a

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