Lalie B S Page

Ton projet est intéressant est très bien structuré mais il n'y aucune erreur ! C'est dommage que ton projet ne soit pas plus "personnalisé" avec des textes rédigés par toi au lieu d'avoir été "copiés" sur un site ou rédigés par quelqu'un qui est bilangue!

Your mark is 12/20

Tes notes sont : 3/4 pts pour les questions sur la feuille distribuée en classe (Appuyez ici pour consulter la page en question) et 9/16 pour le projet (publié sur cette page)

HIV virus


The Human Immunodeficiency Virus is a retrovirus that infects humans and causes Acquired Immune Deficiency Syndrom, which is a weakened state of the immune system making it vulnerable to multiple opportunistic infections.

The word AIDS stands for Acquired Immune Deficiency Syndrome.

The AIDS virus (HIV) enters the body through sexual contact, blood or is transmitted from mother to child. This virus will then invade certain cells of the body's immune system: the CD4 T lymphocytes, which play a fundamental role in the body's defence against microbes.

HIV grows and multiplies inside these cells, causing them to be destroyed. The destruction of CD4 T cells leads to a deterioration of the immune system, which can no longer fulfil its role of fighting infections.

HIV also infects other cells: macrophages, certain nerve or muscle cells.

HIV is now one of the leading causes of death worldwide for adolescents and women of reproductive age.

HIV weakens the immune system and infected people develop serious long-term illnesses. These diseases are called "opportunistic diseases" because they are caused by microorganisms that are harmless to people with normal functioning immune systems.

HIV is a virus that lodges itself in certain white blood cells that allow the body to fight infections and destroy them.

The image if against us shows hiv entering a white blood cell.

A CD4 lymphocyte is a type of white blood cell that helps direct and activate the body's infection-fighting cells. They get their name from the CD4 molecules they carry on their surface. These cells are also called helper T lymphocytes.

Here's what the hiv virus is made of:


This is how the hiv virus gets into cells:



Where does AIDS come from? Sometimes we don't know, but there are two strains affecting humans: HIV-1 and HIV-2.

HIV-1, responsible for almost all AIDS cases worldwide, was transmitted to humans by chimpanzees and also by gorillas.

HIV-1, the main type of AIDS virus present in the world, consists of four groups (M, N, O and P), each with its own origin. However, although the simian (monkey) origin of groups M and N (actually chimpanzees from Cameroon) had been identified several years ago, the reservoir of groups O and P was unknown until now.It is now known that these variants "originate from gorillas in southwestern Cameroon."

Ne pas supprimer SVP

Comments -

Add a New Comment
Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution-ShareAlike 3.0 License