HIVAIDSfall09

HIVAIDSfall09 - HIV/AIDS Susan Hampson Why Study HIV/AIDS...

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Unformatted text preview: HIV/AIDS Susan Hampson Why Study HIV/AIDS? Pandemic state world wide Affects clients of all ages Appropriate care is NOT universal Nations with limited resources affected severely Let’s Start With the Immune System Immune System Monitors and maintains “self” Search and destroy function Immunodeficiency Non-self is NOT recognized Can be present at birth or acquired Autoimmune Problems Immune system unable to differentiate self from non- self Immune defenses attack normal body tissues T Lymphocytes Also known as CD4, T cells, T lymphocytes Have key role in normal immune response Provide immunity against viruses, tumor cells Normal T helper cell levels are 800-1200 cells per microliter of blood Normal life span of T helper cell is 100 days What Is HIV? Human immunodeficiency virus HIV disease characterized by progressive immune system impairment, especially T cells Patient susceptible to infection, unusual cancers Patient usually dies from an opportunistic infection HIV Infection: Pathophysiology HIV binds with receptors on CD4 cells Viral RNA enters cell RNA to DNA via reverse transcriptase Viral DNA copies itself Viral double strand DNA enters host cell nucleus Viral DNA becomes part of host cell’s genetic structure Transmission of HIV Must be contact with body fluids- blood, semen, vaginal secretions, breast milk Transmission possible and lifelong within a few days after infection Modes of transmission include: Sexual intercourse Exposure to HIV infected blood/blood products Perinatal period HIV Is NOT Spread Via Hugging Dry kissing Shaking hands...
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HIVAIDSfall09 - HIV/AIDS Susan Hampson Why Study HIV/AIDS...

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