Causes of AIDS
- Infected blood.
- Infected needles.
- Multiple partners.
- Infected mother to her baby before birth.
- Injectable Drug Abuse.
If a man with HIV has vaginal intercourse without a Condom, infected fluid could pass into the woman’s blood stream through a tiny cut or sore inside her body. This can be so small that you don’t know about it. If a couple have anal intercourse the risk of infection is greater than with vaginal intercourse.
If a man has unprotected sex (i.e. without using a Condom) with a woman infected with HIV, the AIDS virus could get into the man’s blood through a sore patch on his penis or by getting into the tube which runs down the penis.
If there is any contact with blood during sex, this increases the risk of infection. For example, there may be blood in the vagina if intercourse happens during a woman’s periods. There can also be bleeding during anal intercourse.
In AIDS, the human immunodeficiency virus (HIV) destroys a particular type of white blood cell, and this causes progressive immunodeficiency.
Infections like measles or influenza damage the body’s ability to fight infection. They do this partly by decreasing the number of white blood cells involved in fighting the infection. Normally, this type of immuno deficiency is mild, and the immune system returns to normal once the person has recovered from infection.
A mild form if immunodeficiency might form in some chronic disorders, including diabetes mellitus and rheumatoid arthritis. This might occur partly because these diseases put stress on the immune system, decreasing its ability to resist other diseases. Certain types of cancer, particularly tumors of the lymphatic system, might cause a more severe form of immunodeficiency by damaging the cells of the immune system and decreasing the production of usual white blood cells.
The long term use if corticosteroids suppresses the immune system and has the inevitable effect of causing immunodeficiency. Immunosuppressant medicines, which might be given to prevent the rejection of an organ following transplant surgery, also produce immunodeficiency and affect the body’s ability to fight infections. Chemotherapy can damage the bone marrow, where the majority of blood cells are made, and might also lead to acquired immunodeficiency. Immuno deficiency might also form after removal of the spleen, an organ in which few of the white blood cells are produced. Splenectomy might be performed if the spleen has been damaged by an injury or else it might be caused out to treat many disorders including hereditary spherocytosis, which is a type of hemolytic anemia.
There are also several rare types of acquired immunodeficiency, the causes of which are not clear. One rare type is immunoglobulin A (IgA) deficiency, in which levels of immunoglobulin A antibodies are lower than general, leading to an increased number of skin infections.