HIV Flashcards
HIV is a retrovirus that uses
reverse transcriptase
Person with HIV has high number of what and high affinity for what
High number of lymphocytes and high affinity for CD4 t cells
HIV is single stranded or double stranded RNA
single stranded RNA
T cells <200 is what stage of HIV
stage 3 HIV
Antibody test screens for
antibodies against HIV
Antibody/antigen test screens for
antibodies against HIV and HIV itself
Most common test for established infection
HIV antibodies
Which test is preferred for diagnosing HIV as it quicker
HIV-1 p24 antigen test
When should pts be screened (4)
- ages 13-64 in health care settings
- Pts seeking treatment for STDs
- Patients initiating tuberculosis treatment
- pregnant patient
Which one of the following statements is TRUE regarding laboratory-based HIV antibody tests that are approved for use by the US FDA?
A. The IgG-sensitive antibody tests detect HIV sooner after
infection than the IgG/IgM-sensitive antibody tests
B. Recent inoculation with influenza vaccine is a known cause of a false-positive result
C. The most common cause of a false-negative test is
coinfection with hepatitis C virus
D. The IgM/IgG-sensitive antibody tests detect HIV sooner after infection than HIV p24 antigen tests
E. None of the IgM/IgG-sensitive antibody tests can detect HIV-2
B
CD4 count >500 cells/mm
stage 1
CD4 count 200-499 cells/mm
stage 2
CD4 count <200 cells/mm
stage 3
Most common methods of transmission of HIV (2)
- unprotected sex with infected partner
2. sharing needles with infected person
Almost eliminated as risk factors for HIV transmission (2)
- Transmission from mother to fetus
2. infection from blood products
