Showing posts with label parasites. Show all posts
Showing posts with label parasites. Show all posts

Elusive parasite.. Change the shape of the generator against it several times within the same stage to make the immune system is useless

Elusive Parasite:

The many complex cycle of the parasite within its host characterized the change sequential stages, so it is difficult for the immune system to respond to the exterior styling changes which carries antigen Antigen , Visttia parasite prevail phase which has greater resistance to host immunity; Vchl movement of the immune system. This is apparent in the malaria Plasmodium Where change stages of parasites quickly and resist immune specialized phases, called this kind of dodgy Stage Specificty of Parasite antigen.

Powerful Means Of Resistance:

And other parasites can change the shape of the generator against it several times within the same phase, this method represents one of the most powerful means of resistance to make the immune system is useless, like some types of primitives Protozoa And are at high risk for the face of the immune system to its natural presence in the bloodstream.

Vartion Antigenic:

And African Althripanusumaa also that cause sleeping sickness in humans have multiple forms within a single phase, so paralyze antibodies.. This method is called Vartion Antigenic. The ability of third to change the composition of the external; take off some external parasite antigen entire own several times, and develop a new complex for its outer form every time.. Such as sleeping sickness also and the parasite which can be used more than a hundred external jacket so to speak, and called this methodRenewal of surface antigen.

Adhesion Proteins:

The fourth way is the ability of the parasite adhesion proteins means blood like masquerading in the form of one of the components of blood immune system will think it is part of the blood not resist the way and called Antigenic disquise Some worms and bilharzia parasite or Shistosoma.

Parasite hiding.. Hiding in places where less immune cells and secretions of the immune system, which limited his activity often extracellular

Some parasites hiding in places where less immune cells, many of the parasites that cause disease in humans have a place within the cell itself Intra cellular location Is present in the blood only temporarily. It thus hiding from secretions of the immune system, which limited his activity is often outside the cell ..Moreover, the infected cell body not afford to be installed outside sometimes antigen private Parasite hiding .. Not raise antibodies to the trend toward him. As if the immune system detects the presence of the parasite inside the cell, the cell killing infected body first to be able to eliminate the parasite hiding.The one protozoa Toxoplasma Abortion-causing in humans this process also play malaria.
Other parasites such as worms burrowing in the gut cavities Intraluminal location Kalaskars. Ascaris.

Elusive parasite in his battle with the body.. Antibody secretion and follow parasite several defensive means against

Malaria, bilharzia, sleeping sickness ... Parasitic disease for as long as human with income in fierce battles the Sometimes Aiqarha and times Tgahrh .. Malaria kills one million to two million people a year, registered the highest cause of mortality in the world, and pays the traveler in England dearly to buy medicine Almllarron Malorone To keep his life from malaria that struck two thousand English after their return from Africa also reported CNN Last month. While the incidence of schistosomiasis in Egypt, for example, 20% of the population, and lead to economic losses estimated at $ 500 million.
There are approximately 10,000 infected with sleeping sickness in Sudan alone, according to reports May 2001 The parasite Alkhndeghi Cryptosporidium , Has attacked the entire city in Canada with the beginning of last month claiming dozens of lives and hundreds injured;, where they drank from contaminated water.
So why were these parasites, despite the small size of this force? And how the defenses of the immune system unable to face? What are the means of defense which he has put God to defend the other for the right to life??
Before wander with the parasite within the human and answer these questions, we know the beginning of that organism lives at the expense of another organism called "host" Host Derived food and abode it usually causes him some damage or injury. And dependent host resistance to such a parasite on several ways, the most important of the secretion of the immune system antibodies Antibodies And dependence on the white blood cells WBC's An important line of defense and essential in this battle.
When the parasite enters the external composition which carries antigen or Antigen Raises secretion of these antibodies, the immune system and raises to move against him ... However, there are multiple ways followed by the parasite in its battle inside the body, according to the kind and strength .. The parasite can one follow several defensive means at the same time.

Animal parasites Altalaúaaat semi.. Division theropod false. Drinking contaminated water

Of the most famous sex amoeba which types Ontameba Hustolitika that parasitize the human intestine causing dysentery and disease contagious phase is a phase Almtkis with four nuclei which is the patient's feces and is transmitted to a healthy person through:
1 - contaminated hands gastro-phase.
2 - drinking contaminated water.               
3 - flies that moves between the patient's stool and proper diet.
4 - unwashed vegetables well.

Parasitism Parasitism.. Physiological link between a pair of organisms

Is a physiological link between a pair of organisms, one Complacency on the other object to the requirements of its own food and called interdependent parasite and the other on behalf of the host and noted that the parasite often causes damage to the host.
In most cases parasite spends part of his life in one of the families and the other part in the second earner, and called on the host that contains a parasite in mature phases and is where sexual reproduction base Balaaúl (final) Defenitive host   The host that contains uncompleted phases and which asexual reproduction occurs it is called intermediate hosts   Intermediate host.
It is the nature of the parasite adoption entirely on family, neighborhood, and without it you can not to this parasite that lives,
If Matt host it necessarily die parasite as well, or he must go to the host last, so the parasite ideal is what takes the family to the extent that is sufficient for living naturally, but does not eliminate it, and often the parasites do not leave their hosts only after producing his successor numbers very large, and then move to another host private means may be a mosquito, for example as in the case of malaria.. And so on. 
Parasites are transmitted from one host to another in several ways. Aftvillat digestive up to the host by mouth, or may penetrate the skin to settle eventually in the gut as you do hookworm, and the blood parasites they rely on insects insightful Kalpawwad or ticks you move from one host to another.
And parasites either single-celled microscopic "Kalontameba" that causes dysentery, or many cells seen by the naked eye Kdidan Ascaris and hookworm.
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