40 Flashcards
(463 cards)
Infant HIV testing
HIV DNA PCR at 48hrs, 4-6wk, 3 mo
HIV Ab at 12-18 mo
new HIV labs
CBC, LFT, BUN/creat, urinalysis, hepatitis serologies, blood glucose, lipids, genotypic resistance, STIs, opportunistics (toxo, CMV, PPD)
Preventive Txt PCP in HIV
CD4 <200 DS Bactrim daily
Preventive Txt Toxoplasmosis in HIV
CD4 <100+toxo Ab DS Bactrim daily
Preventive Txt MAC in HIV
CD4<50 Azithro or clarithro weekly
Routine Vaccines in HIV
pneumovax if CD>200, HAV, HBV, flu
screen for HBV, HCV
HIV Treatment based on CD4 count in adult
Treat CD4500 (WHO defer until <350)
HIV Meds
entry inh (fusion inh, CCR5 blockers), NRTIs, NNRTIs, integrase inh, protease inh
HIV med drug interaction
inhaled steroids, statins, methadone, OCPs, rifampin, erectile dysfunction, st johns wort, PPIs, coumadin
Protease Inh drug interactions
HIGH RISK/CI - simvastatin, lovastatin
mod risk - fibrate+statin, atorvastatin
low risk - fibrates, pravastatin, fluvastatin, rosuvastatin, fish oil, niacin
HBV, HCV, HIV avg transmission rates
HBV 30% > HCV 3% gt HIV 0.3%
Occupational exposure risks
IM injury 16% > advanced AIDS source pt 6% > visible blood on device/needle enter blood vessel 5% >AZT PEP 0.2%
Post-exposure prophylaxis - occupational and non occ
3 drug therapy, 28 days, immediate start to meds important
reduces risk 81%
Post-exposure F/U testings
Initial - CBC, creat, LFT, HIV Ab, HCV Ab, HBsAg/Ab
2 weeks - CBC, creat, LFTs
6 weeks - HIV ab, HCV ab, RPR
3 mo+6mo - HIV ab, HCV ab (stop at 3 mo if using p24 ab test)
Pre-exposure prophylaxis
Truvada daily
risk reduction 44%, up to 90%
Pre-exposure prophylaxis pre-initiation testing
Test for HIV ab, CrCl>60
screen and vaccinate HBV
screen and treat STDs
Pre-exposure prophylaxis F/U
F/u - q3mo - HIV ab, STD sx eval, counsel
q6 mo - STD test even is asymp
BUN/creat 3 mo post start then annually
HIV incubation period
2-4 weeks
Acute retroviral syndrome timing
2-4 weeks post exposure, lasts 3-14 days
Acute retroviral syndrome Sx
fever, rash, swollen lymph - high viremia
HIV tests
*Elisa - negative until >3-4wk post infection
P24 - 3 weeks
HIV RNA - +10-15 days post infection
- use unless suspect acute retroviral syndrome
HIV Clinical Latency Sx, tests, duration
HIV ab response - cell mediated then humoral
Symptoms - none
Tests - Elisa+ HIV RNA+
Duration - variable
Viral set point HIV
predictor of dx - set 3-6 mo post infection
high set point - high rate of transmission
Symptomatic phase - CD4 related dx’s
Progression to AIDS
CD4<500 - bacterial pneumo, TB, minor skin infections more common
CD4 200-500 - opportunistic infections - herpes zoster, TB, candidiasis, PCP, toxo, CMV, kaposi, HSV