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The Immune System: HIV and AIDS. Ryuya Yokata , Jun Ha Kim, Samata Pandey Block A . INTRESTING FACT:. AIDS started from a monkey in Camer o on . Outline the effects of HIV on the immune system. Outline the effects of HIV on the immune system.

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the immune system hiv and aids

The Immune System: HIV and AIDS

RyuyaYokata, Jun Ha Kim, Samata Pandey

Block A

intresting fact

INTRESTING FACT:

AIDS started from a monkey in Cameroon

outline the effects of hiv on the immune system1
Outline the effects of HIV on the immune system
  • Acquired immunodeficiency syndrome (AIDS) is caused by the human immunodeficiency virus (HIV).
  • HIV is best known for targeting the T-lymphocyte cells (T-cells) of the immune system.
  • T-cells identify pathogens and they help other types of white blood cells to fight off pathogens.
  • Once HIV has attacked and moved into a T cell, it converts that cell into a miniature virus factory.
  • Eventually there are so many new viruses in the cell that the T cell explodes, scattering the HIV back into the bloodstream.
  • The virus then moves on to fresh T cells and repeats the process. Over time, the HIV can destroy virtually all of an infected person's T-cells in this manner.
outline the effects of hiv on the immune system2
Outline the effects of HIV on the immune system
  • With fewer and fewer T-cells the body’s immune system becomes crippled and unable to fight off common organisms that would not present a problem to a healthy immune system.
  • Some of first symptoms of HIV infection which appear after about 9 monthsare:
    • swollen lymph glands
    • severe fatigue
    • fevers
    • coughing
    • persistent diarrhea
  • HIV is only transmitted through the exchange of body fluids; it does not survive long outside infected tissues.
outline the effects of hiv on the immune system3
Outline the effects of HIV on the immune system
  • The final stageis called AIDS
    • occurs when the lymphocyte count becomes too low to fight off ordinary infections.
    • An AIDS patient experiences severe weight loss, weakness, and persistent diarrhea.
    • AIDS can take years to kill the patient.
discuss the cause transmission and social implications of aids1
Discuss the cause, transmission and social implications of AIDS

The Cause of HIV

  • Acquired immunodeficiency syndrome (AIDS) is caused by the human immunodeficiency virus (HIV).
  • HIV infects and reduces the number of lymphocytes.
    • reduces the body’s ability to produce antibodies
    • cripples its ability to defend itself against other diseases.
  • Some of the first symptoms of an HIV infection which appear after about 9 months
    • swollen lymph glands,
    • severe fatigue
    • fevers
    • coughing
    • persistent diarrhea.
  • The final stage, called AIDS, occurs when the lymphocyte count becomes too low to fight off ordinary infections. The patient experiences severe weight loss, weakness, and persistent diarrhea.
    • AIDS can take years to kill the patient.
discuss the cause transmission and social implications of aids2
Discuss the cause, transmission and social implications of AIDS

The Transmission of HIV

  • HIV is only transmitted through the exchange of body fluids
    • it does not survive long outside infected tissues.
    • AIDS is NOT transmitted by; shaking hands, hugging, kissing, coughing, or sneezing.
  • Transmission requires the transfer of body fluids from an infected person to an unaffected one:
    • Through small cuts in the vagina, penis, mouth or rectum during vaginal, anal or oral sex (using condoms and avoiding sex with multiple partners reduces the risk of contracting HIV).
    • In traces of blood on a needle that is shared by intravenous drug users.
    • Across the placenta from a mother to baby or in the milk during breast feeding.
    • In transfused blood during surgery or in blood products used to treat hemophiliacs.
discuss the cause transmission and social implications of aids3
Discuss the cause, transmission and social implications of AIDS

The Social Implications of AIDS

  • AIDS is a major social problem in all countries, especially in Africa and Asia.
    • It presently infects an estimated 40 million people including men, women and children.
  • Families & friends suffer grief when a loved one is sick with AIDS.
  • Families may become poorer if the victim becomes unable to work
  • Individuals with AIDS may be stigmatized by society making it difficult to find employment, housing, and partners.
  • In countries with high rates of HIV, people may avoid sex or live in fear if sexually active.
  • The AIDS epidemic is so severe in some African countries that the majority of the workforce has died, thus destroying economies and eroding cultures.
other interesting websites
Other Interesting Websites:
  • http://www.unfpa.org/aids_clock/