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Ch. 25 HIV / AIDS

Ch. 25 HIV / AIDS. Lesson 4 Treatment for HIV / AIDS. Stages of HIV Infection. The HIV infection develops in stages over the course of several years A person is considered infectious immediately after contacting the virus

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Ch. 25 HIV / AIDS

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  1. Ch. 25 HIV / AIDS Lesson 4 Treatment for HIV / AIDS

  2. Stages of HIV Infection • The HIV infection develops in stages over the course of several years • A person is considered infectious immediately after contacting the virus • About half of those infected develop flu-like symptoms 3-6 weeks after becoming infected

  3. Stages of HIV (Asymptomatic Stage) • After the flu-like symptoms disappear, the person enters the asymptomatic stage- a period of time during which a person infected has no symptoms. • A person may show no signs for 6 months to 10 yrs or more. • The virus continues to grow and can still transmit the virus to others. (very scary!)

  4. Symptomatic Stage • During the asymptomatic stage the immune system declines to the point where other infections start to take over. • This marks the symptomatic stage- a person with HIV has symptoms as a result of a severe drop in the immune cells. • Symptoms include: swollen glands, weight loss, and yeast infections.

  5. AIDS • During the latter stage of HIV, more serious symptoms appear, a severely damaged immune system measured by numbers of helper T-cells • And the appearance of one or more opportunistic infections or illnesses. • By the time AIDS develops, HIV often attacks brain cells, causing difficulty in thinking and remembering.

  6. Detecting HIV…EIA Test • The first test usually performed is the EIA Test, which screens for the presence of HIV antibodies in the blood. • However the EIA test may give inaccurate results (two reasons for this)

  7. 1. Developing antibodies takes time after initial infection. Before antibodies develop the EIA may give a false negative result. Most people will test positive in 3-4 weeks, but some take up to six months to test positive. 2. Certain health conditions, such as hemophilia, hepatitis, and pregnancy, can cause the EIA to give a false reading. Which is why other confirmation tests will be done. Two Reasons EIA may give inaccurate results…

  8. Western Blot Test • Most common confirmation test for HIV in the US. • If done properly, this test is 100% accurate. • If the results of these test are positive, a person is determined to have HIV.

  9. Research and Treatment • Several medications have been developed to treat HIV and to treat and prevent the complications of opportunistic infections. • Treatments have extended and improved the quality of life. • However, none of the drugs cures HIV/AIDS • One reason that a cure is so hard to find is that HIV infects the very cells that regulate the immune response.

  10. Research and Treatment continued… • In addition, several new strains of the virus have emerged since it was first discovered, making it even harder to develop an effective treatment. • Also, treatment can be costly.

  11. HIV / AIDS…A continuing problem • There has been a decrease in the AIDs cases thanks to the success of drug cocktails (combinations of drugs) that slow the progression of HIV infection • Research has identified new, drug-resistant strains of HIV • There is still no cure for this fatal disease.

  12. HIV / AIDS…A continuing problem • At the end of 2001, an estimated 40 million people worldwide were infected with HIV/AIDS • HIV is now a pandemic-a global outbreak of infectious disease • It is estimated that in 2001 alone, 5 million people became infected with HIV / AIDS worldwide.

  13. Staying Informed about HIV / AIDS • Because neither a cure for AIDS nor an effective vaccine is available, knowledge is the first defense against infection. • Avoiding high-risk behaviors, staying informed, and making responsible decisions, you can protect yourself and others from infection.

  14. Choosing to remain abstinent shows that you are taking an active role in caring for your health. Avoid pressure to engage in sexual activity and use of drugs. Practice refusal skills. Be firm when you refuse to take in part of in drug use or sexual activity. Use body language as well as words to get your message across. Choose relationships carefully. Abstinence and HIV / AIDS

  15. Review Questions • What is asymptomatic HIV infection? • When is the Western blot test performed? • Explain how technologies such as new drug treatments have impacted the health status of people with HIV infection as well as people’s attitudes toward the AIDS epidemic.

  16. Review questions continued… 4. Why might people in the US have better access to AIDS treatment than people in developing nations? 5. What strategies can you use to resist pressure to engage in sexual activity or drug use and in doing so reduce your risk of HIV infection?

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