HIV Disease: Clinical Implications for PT Flashcards
Globally…. # of people who have died of AIDS since start of pandemic
30,000,000
HIV Prevalence in U.S.
1 in every _______ persons is HIV+
250
Leading cause of death in persons w/ Advanced HIV disease (AIDS)
Opportunistic Infx
Which is Contraindicated in a pt w/ Acute Inflammatory Myopathy?
PREs
Sandy has HIV and Acute Inflammatory Myopathy. You expect to see:
Diffuse myalgia and PROXIMAL weakness*
Trunk, shoulder/pelvic girdles
Which of the following opportunistic infx’s is the MOST RARE in people w/ HIV?
Progressive Multifocal Leukoencephalopathy
HIV Hx
- 40s or 50s→ Cameroon, Africa- wild chimpanzees, man either bit or exposed butchering monkey
- Mid 1970s→ rare illnesses/infx in gay men
- 5 young men tx for biopsy confirmed P. carinii pneumonia. 2 pts died. All 5 had lab confirmed prev or current CMV infx and candida mucosal infx
AIDS term coined
1982
FIRST antiretroviral (ART) drug for AIDS
AZT
Routes to a cure
“Functional Cure” vs. “Complete eradication of virus”
- Conventional cure difficult
-
Sustained virologic remission→ “Functional cure”
- w/out having to continue lifelong ART meds maybe more realistic
Route to a cure:
Currently under study
- Therapeutic vaccine
-
Antibody therapy→ immune system enhancement
- “Elite controllers”→ have certain killer T cells that keep virus suppressed
- “Shock and Kill”→ chemo to draw HIV out of reservoir sites and kill it
- Gene therapy→ mod of receptors (CCR5) on CD4s so HIV cannot get in
- Gene therapy→ molecular scissors to “snip out” HIV DNA from host cells
- Combo→ enhance immune system + modify CCR5 receptors + destroy latent reservoirs
Trends in Annual Age-Adjusted Rate of Death w/ HIV Disease as the Underlying Cause
DROP in rate 1995….why?
Triple Combo Tx
HIV Myths + Facts
Myth: HIV is an IV-drug abusers disease or a gay male’s disease
FACTS?
- FACT:
-
HIV infects people all walks of life. Does NOT discriminate
-
all races/genders/sex preferences
- hetero→ 32% cases
-
all races/genders/sex preferences
- any age, socioeco stat
-
HIV infects people all walks of life. Does NOT discriminate
- FACT:
- Men who have sex w/ men and IV-drug users are at a higher risk for infx (higher # exposures)
HIV Myths + Facts
Myth: HIV can be cured w/ new meds; its not so serious now
FACTS?
- FACT:
- There is NO CURE for HIV; once infected, HIV cannot be eradicated from body
- FACT:
-
ART drugs can greatly INC life-expect, BUT…
- SEs/toxicities
- Near perfect adherence=critical to success
- marginalized or underinsured indiv’s have limtd access
-
ART drugs can greatly INC life-expect, BUT…
1 in ________ Am’s is HIV+
250
Why don’t we all say YES to knowing someone w/ HIV?
- Stigma/reluctance to share
- Person you know hasn’t told you
- Person doesn’t know
- 14% of HIV+ Am’s are not aware of HIV stats
Pt w/ prob NOT related to HIV, but is HIV+
referred for tx of MSK prob
Med Hx includes HIV+
SAME exam and intervent as any patient: Keep in mind
S/S of possible comorbs, Monitor VS, ART SEs
Pt w/ problem related to HIV disease, comorbs, or ART SEs
Exam of and interventions for impairs, functional limits, or disability
-
Example:
- Balance deficits and gait disturbs due to adv. peripheral neuropathy and CMV
- Knee pain, impaired ROM and impaired mm perform due to HIV related arthritis
Stigma assocd w/ HIV….WHY?
Ignorance/misperceptions, irrational/puritanical judgements, stereotyping, scape-goat/blame-game, bigotry, homophobia
How can I REDUCE STIGMA?
- Discuss HIV openly
- Educate!
- Non-judgemental
- Resources
- local testing and counseling centers
- Info resources
>35 mil living w/ HIV/AIDS
Only 53% have access to ART Meds !!!!
Hispanics→ 27% of new infx’s
Blacks/Af Am’s→ 44% new infx’s
WHY?
- Comm’s of color:
- greater prevalence HIV→ community incubators
- Higher poverty
- limtd access
- Higher rates of undx’d STD→ inc risk HIV
- Higher rates incarceration
- More stigma/homophobia
HIV in “Golden Years” aka older individuals
Prevalence inc’ing indiv’s >50yo
- Incd longevity due to ART: PWHIV living longer
- New Infx’s: 10% of new infx’s in indivs >55yo
Prognosis is ______ in Older individuals
WORSE!!!!!
Prognosis is WORSE in older individuals
- Many elderly pts do not receive HIV Dx until they have full blown disease and thus have WORSE prognosis
- More HIV and non-HIV related comorbs in older pts
- Immunosenescence→ immune system dysf.
- Psychosoc, nutritional, lifestyle factors
Delayed Dx in older individuals
BIG REASON FOR THIS???
***MANY early sx’s of HIV mimic common presentations of other dis’s or may be attributed to “getting old”
- Fatigue, wt loss, neuropsycho changes, chronic pain, depression/social iso.
IMPORTANT! KNOW THIS!!!
Older pts w/ HIV have WORSE prognosis because:
- Greater chance of delayed dx
- Presence of multimorbidity
- Immunosenescence
HIV aka
Human Immunodeficiency (retro) Virus
HIV Disease
Cause and what is it?
- Cause→ Infx w/ HIV
-
Suppression of immune system
- INCd risk for life-threatening opportunistic infx’s
HIV Stages
AASA****
W/OUT ART
- A: Acute infx
- A: Asymptomatic HIV Dis.
- S: Symptomatic HIV Dis.
-
A: Advanced HIV Dis./AIDS
- “Acquired Immunodeficiency Syndrome”
HIV Replication takes how long?
2.6d
HIV Replication Steps:
youtube.com/watch?v=RO8MP3wMvqg
Remember steps from pic (see below)
- Free virus
- Binding and Fusion
- Infection
- Reverse Transcription
- Integration
- Transcription (Copies)
- Assembly
- Budding
- Maturation
HIV replicates in, and eventually kills:
CD4 cells***
Viral replication in a CD4 cell involves all of the following enzymes
- Transcriptase
- Integrase
- Protease
NOTE: does NOT involve creatine phosphokinase (from pollev.)
#1 HIV Transmission Route:
Sexual Contact
HIV Transmission routes
- #1: Sexual contact
- Sharing needles (IV drug use)
- Blood to blood (or blood derived fluid) contact
-
Mother→ child
- pregnancy, delivery, breast feeding
Fluids that transmit HIV
- Semen→ unprotected sex
- Vaginal fluid→ unprotected sex
- Blood
- Breast milk
- Other body fluids w/ blood
YOU CANNOT GET HIV FROM HUGGING OR SHAKING HANDS W/ PERSON W/ ADVANCED HIV DISEASE (AIDS) !!!!
Unless open wound or blood→blood but in general….
GLOBALLY…..#1 Axis of Transmission for HIV
Heterosexual sex
Heterosexual sex is __________
Globally #1 transmission route of HIV
All are routes of transmission for HIV
Sex, blood-blood, mother→baby during childbirth
NOT a route of HIV transmission?
Inhalation of airborne particles
Why do Untreated individuals (NOT ON ART) die from HIV?
Opportunistic infx’s
Why do Treated Indiv’s (on ART) die from HIV?
- Comps/Comorbs related to med toxicities and/or chronic infx
- Poor adherence to ART→ disease progresses