HIV Flashcards
(37 cards)
HIV
Causes immunosuppression making person more susceptible to infection
HIV transmission
through contact of certain bodily fluids: blood semen, vaginal secretions, and breast milk
what is the most common mode of transmission of HIV
unprotected sex
what is the main cause of disease, disability and death in patients with HIV
Opportunistic diseases
Patho of HIV
· Immune problems start when CD4+ T cell counts drop to < 500 cells/μL (Normal range 800-1200 cells/μL)
· Severe problems develop when < 200 CD4+ T cells/μL
<500 INDICATES
· HIV
<200 INDICATES
AIDS
what precautions is the best prevention for HIV
standard precaution
HIV Infectious Process
· CD4+ T-cells become “HIV factory” to make new viral particles daily
· Gradually, CD4+ T-cell count falls, viral load rises
· Immune systems weakens
· Everyone with AIDS has HIV; not everyone with HIV has AIDS
At-risk patients questions to ask
· Received blood transfusion or clotting factors before 1985?
· Shared needles with another person?
· Had a sexual experience with a penis, vagina, rectum, or mouth in contact with these areas of another person?
· Had a sexually transmitted infection?
Antiretroviral therapy:
a combination of medication used to control and suppress HIV replication.
· Acute HIV Infection clinical manifestations
· Mononucleosis-like syndrome (fever, swollen lymph nodes, sore throat, headache, malaise, nausea, muscle and joint pain, diarrhea, and/or a diffuse rash)
· Neurologic complications (aseptic meningitis, peripheral neuropathy, facial palsy, or Guillain-Barré syndrome)
· High viral load (the amount of HIV circulating in the blood)
· CD4+ T cell counts fall temporarily but quickly return to baseline or near-baseline levels
what is the most infectious time during HIV
acute phase, 2-4 weeks after infection because of the high amount of circulating HIV
clinical manifestations of HIV
· Weight loss
· Cough
· Sore throat
· Headache
· Swollen lymph nodes
· Diarrhea
· Vomiting
· Muscle pain
· Joint pain
· Skin rashes
· Fevers`
Opportunistic Infections
· Oropharyngeal candidiasis (Thrush)
· Oral Hairy Leukoplakia
· Varicella - zoster virus (Shingles)
· Persistent vaginal candida infections
· Herpes (oral and/or genital)
· Pneumocystis jiroveci pneumonia
· Karposi’s sarcoma
· Hepatitis B & C
· Oral Hairy Leukoplakia
o An Epstein-Barr virus infection that causes painless, white, raised lesions on the lateral aspect of the tongue, can occur at this phase of the infection and is another indicator of disease progression.
· Pneumocystis jiroveci pneumonia
o A type of pneumonia that can appear as an opportunistic disease associated with HIV infection
· Karposi’s sarcoma
o Malignant vascular lesions such as Kaposi sarcoma lesions can appear anywhere on skin surface or on internal organs.
Karposi’s sarcoma Treatments
o Radiation therapy, cryosurgery, or a topical retinoid, may be used if a person has only a few skin lesions
Diagnostic studies
· Diagnosis is made by testing HIV antibodies and/or antigens by using blood or saliva.
Lab Studies
· CD4+ T-cell counts
· CD4+ T-cell count provides a marker of immune function
· Viral load
· Blood chemistries, CBC, stool testing, biopsies
the lower the viral load, the _____
the less active the disease
AIDS is diagnosed when an individual with HIV develops at least one of the following conditions:
· CD4+ T cell count drops below 200 cells/µL.
· One of the following opportunistic cancers:
o Invasive cervical cancer
o Kaposi sarcoma (KS)
o Burkitt’s lymphoma
o Immunoblastic lymphoma
o Primary lymphoma of the brain
How to prevent HIV: ABCs
· Abstinence
· Be faithful
· Condoms