AIDS Flashcards
Can we use the elisa test to diagnose AIDS
no as elisa test gives yes or no answer for the presence of HIV
how do you diagnose AIDS
symptoms
number of Th cells
what does AIDS stand for
Acquired Immune Defiency Syndrome
what can elisa test be used to test for
HIV
why is there no colour change if HIV is not present
no HIV antigen
means 1st antibody will not bind
means 2nd and antibody that is linked to enyzme won’t bind
so there is no coloured product
if a mum is HIV positive
why may a breastfed baby test positive for HIV at 8 weeks but HIV negative at 18 months
baby may receive HIV antibodies from mum’s breastmilk
passive immunity as antibodies are destroyed hence negative results at 18 months
why do tests like elisa have controls
to show only enzyme on antibody 2 is causing color change
to show all steps are effective (washing)
