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Archive for the ‘Hiv /aids’ Category

Causes
The human immunodeficiency virus (HIV) can be spread in the following ways:

Through sexual contact including oral, vaginal and anal.
Through blood, through blood transfusions, accidental needle punctures or needle sharing.
From mother to child: A pregnant woman can pass the virus to the fetus through their shared blood circulation, or a nursing mother can pass it to her baby through breast milk.
Rare forms in which the virus can spread include: Read the rest of this entry »

What are HIV and AIDS?

HIV is the virus of immunodeficiency human. CDC estimates that about 56,000 people in the United States contracted HIV in 2006.

Two types of HIV, HIV-1 and HIV-2. In the United States, unless otherwise indicated, the term “HIV” refers primarily to HIV-1.
Both types of HIV cause damage to the human body by destroying specific blood cells, called CD4 + T cells, which are vital to fend off disease.

After a few weeks of becoming infected with HIV, some people develop symptoms similar to those of influenza (flu) that last a week or two, but others have no symptoms. People living with HIV may look healthy and feel good for several years. However, even when healthy, HIV is affecting your body. All people with HIV should consult a doctor usually specializes in treating HIV. Many people with HIV, including those who feel well, can benefit greatly from current medications used to treat HIV infection. These drugs may limit or delay the destruction of the immune system, improve the health of people living with HIV and reduce their ability to transmit. HIV infection is not treated promptly also have been associated with many diseases of cardiovascular, renal, and liver cancers. There are also many support services for people with HIV. These services can help patients cope with their diagnosis, reduce risk behaviors and find the services they require. Read the rest of this entry »

The virus is transmitted through:

blood;
per-ejaculatory fluid;
semen;
vaginal secretions;
breast milk;
unprotected sex the condom with an infected person or who do not yet know they are.

Through the passage of blood from an infected person to a healthy person (ie the exchange of infected needles). For HIV-positive mother to her son during pregnancy , childbirth el ‘ lactation .
The transfusions , organ transplants and insemination, in European countries, are screened and carefully checked to exclude the presence of HIV. In cases of surgery are recommended auto transfusion (your blood is collected and stored frozen should it serve). Avoid risks and adopt responsible behavior is the best prevention, to protect themselves and others is to act in a conscious way and to express solidarity. Read the rest of this entry »

HIV infection (AIDS): What is it?

HIV, or human immunodeficiency virus, is a type of virus that can cause a deadly disease called AIDS (acquired immunodeficiency syndrome). Infection with HIV gradually weakens the immune system, in other words the body’s natural defenses against disease. If left untreated, serious illnesses can occur. Normally harmless infections like flu or bronchitis may worsen and become very difficult to treat or even death. In addition, cancer risk is significantly increased.

What distinguishes HIV from other viruses is that it attacks the immune system by taking control of CD4 T cells. The latter role is to coordinate the immune response when a virus is present. When HIV uses CD4 cells to spread, it damages them and destroys them. In doing so, HIV Mine within the immune system’s role is to fight it (see diagram). Read the rest of this entry »

HIV (Human Immunodeficiency Virus) attacks the defense system of the body. The infection is characterized by immune deficiency, that is to say that the body loses its ability to fight against infections.
HIV is composed of a core of viral enzymes and proteins. Unlike a cell, HIV can not replicate in the free state, it needs a host cell. That’s why its envelope binds to the surface of a cell on a cell membrane protein that serves as a gateway, then the virus loses its envelope, releasing its core. The cell nucleus is then considered the virus’s genetic material as its own and its biological activity is diverted to the virus. The cell dies and created new viruses spread through the body to infect other cells, and so on.
The virus develops in the body: two people infected with the same virus in their bodies were different from each virus and different virus origin, after a few months. The same person can be a carrier of various viruses. Viruses do not grow all at the same speed and in the same way, they have different virulence and do not attack the same target cells. That is why two people with HIV should continue to protect them in order to avoid phenomena surcontamination

1 – Composition of u HIV (Human Immunodeficiency Virus)

HIV is composed of a nucleus containing genetic material (which can be regarded as the mastermind of the virus), viral enzymes, proteins …. This is a lentivirus because it causes a slowly progressing disease. His appearance is that of a small sphere of about 1 / 10 000th of a millimeter, or 10,000 times smaller than a cell. The biological material, compound for HIV RNA and DNA to cells, determines the biological activity of the cell or virus (its development, reproduction …). Read the rest of this entry »