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Priyo Budi Purwono, drKuliah Mikrobiologi
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Introduction “Human Immunodeficiency Virus” A specific type of virus (a retrovirus) An enveloped virus, 100 nm diameter ss +RNA genome enzyme reverse transcriptase Receptor : CD4 molecule of T helper
lymphocyte, macrophages
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AIDS
Acquired Immunodeficiency Syndrome HIV is the virus that causes AIDS Disease limits the body’s ability to fight
infection A person with AIDS has a very weak
immune system High risk of Opprtunistic Infection
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New HIV Infections in 2002 by Age Group
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HIV
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The Role of T lymphocyte
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Transmission (body fluid) 3 i : Intrauterine, or post partum, mother to
child infection (vertical infection) Intravenous : tranfusion, needle stick
injury Intercourse, genital lession/ ulceration
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High Risk Group for HIV infection
Intra vena drug user (NAPZA) Unhealthy sexual behaviour HIV infected sexual partner Blood tranfussion Health care worker
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Stage 1 – Seroconvertion illness
10-50% Short, flu-like illness - occurs one to six
weeks after infection “window period” Serology test and western blot negative RNA viral load may positif Infected person can infect other people
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Stage 2 - Asymptomatic
Lasts for several years This stage is free from symptoms The virus is not latent, but multiplying actively
in cell HIV antibodies are detectable in the blood
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Stage 3 – Persistent Generalised Lymphadenopathy (PGL)
Painless Symetrical 25 % asymtomatic
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Stage 4 – AIDS related features or Complex (ARC)
The immune system weakens Oral or vaginal candidiasis Cervical dysplasia, carcinoma Chronic diarrhea Sel CD4 >200/µl
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Stage 5 - AIDS
20 AIDS defining illnesses (ADIs) Opportunistic infection occure HIV encephalopathy Wasting syndrome (loss of BW >10%) Fever and chronic diarhhoea CD4 count <200
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Opportunistic Infections associated with AIDS
BacterialTuberculosis (TB)Strep pneumonia
ViralKaposi Sarcoma
(HHV 8)CMVHerpes simplex
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Opportunistic Infections associated with AIDS
ParasiticPneumocystis
cariniiToxoplasmosis
FungalCandidaCryptococcus
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Blood Detection Tests
Enzyme-Linked Immunosorbent Assay/Enzyme Immunoassay (ELISA/EIA)
Radio Immunoprecipitation Assay/Indirect Fluorescent Antibody Assay (RIP/IFA)
Western Blot Confirmatory test Polymerase Chain Reaction (PCR) Viral load HIV
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Pre-test Counseling
Transmission Prevention Risk Factors Voluntary & Confidential Reportability of Positive Test Results
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Post-test Counseling
Clarifies test results Need for additional testing Promotion of safe behavior Release of results
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Theraphy
HAART (Highly Active Anti Retroviral Therapy), Triple therapy :
1. 2 NRTI and 1 NNRTI or
2. 2 NRTI and 1 PI
NRTI : Nucleoside Reverse Transcriptase Inhibitor
NNRTI : Non Nucleoside Reverse Transcriptase Inhibitor
PI : Protease Inhibitor
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Antiretroviral Drugs
Nucleoside Reverse Transcriptase inhibitorsAZT (Zidovudine)
Non-Nucleoside Transcriptase inhibitorsViramune (Nevirapine)
Protease inhibitorsNorvir (Ritonavir)
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Control & Prevention
avoid intravenous drug abuse Sterile needle for injection Safe equipment and disposal Screen blood donor Safe sex : Prostitution regulation Sex and Drug abuse education Stop negatif stigma
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Question ?
Apakah ibu hamil dengan HIV positif selalu menular pada anak ?
Seorang PSK datang ke LSM dengan membawa hasil tes HIV yang negatif, apa saran/tindakan saudara ?
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Keep aware !!