Prevention Of HIV/AIDS

1. HIV/ AIDS
The 21
st
century pandemic

Dr Soumar Dutta

Dr Soumar Dutta
CDMOCDMO

Guwahati Refinery Hospital

Guwahati Refinery Hospital

2. A Acquired
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3. AA Acquired
IIImmuno
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4. AA Acquired
IIImmuno
DD Deficiency

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5. AA Acquired
IIImmuno
DD Deficiency
SS Syndrome
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6. HH Human
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7. HH Human
II Immunodeficiency
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8. HH Human
II Immunodeficiency
VV Virus
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9. HIV/AIDS refers to…
“Acquired Immuno Deficiency Syndrome”
(AIDS) (AIDS) or a set of symptoms and
infections resulting from the damage to the
human immune system caused by the
Human Immunodeficiency Virus (HIV)(HIV)..
This condition progressively reduces the
effectiveness of the immune system and
leaves individuals susceptible to
opportunistic infections and tumors.
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10. Basic Definitions And Meanings
•What is HIV?
•HIV is “Human Immunodeficiency Virus”,it is the
virus that cause AIDS.
•Human means that it affects only humans and
lives only in humans.
•The virus does not live in toilets, mosquitoes,
cups, spoons, on bed sheets or towels that people
with HIV might have used.
•Immunodeficiency refers to lack(deficiency) or
breakdown of immune system. The “immune
system” is the body’s resistance or the body’s
defense force for fighting off infections.
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11. The virus attacks and eventually overcomes
the body’s immune system. The immune
system is usually able to defend the body
against infections.
•A virus is a germ.
•What is AIDS?
•AIDS means “Acquired Immunodeficiency
Syndrome”
•To acquire means to “get or develop over a
period of time”
•The immune system breaks down gradually
over time.
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12. It gets deficient or less and less efficient,
under relentless attack by the multiplying
number of virus in the body.
•Syndrome refers to the group or collection of
signs and symptoms of indication of
diseases in a person who has AIDS.
HIV is the infectious stage of the condition, HIV is the infectious stage of the condition,
AIDS is the disease phase.AIDS is the disease phase.
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14. The Origin of AIDS and HIV
HIV came from a similar virus found in
chimpanzees - SIV.
HIV probably entered the United States
around 1970.the first recognized case
of AIDS was in the early 1980s.
HIV is a lentevirus (slow virus),which in
turn is a part of a larger group of viruses
known as retro virus
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15. Epidemiology
Males>females
Occurs in all ages and ethnic groups
All areas of the country are affected
In some city inner areas, as many as 50% of
males are HIV positive
AIDS is now the second leading cause of
death for all men aged 25-44 years
(Unintended injuries is #1 and heart disease is
#3 for this age group)
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16. HIV Transmission
•HIV enters the bloodstream through:
Open Cuts
Breaks in the skin
Mucous membranes
Direct injection
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17. Routes of Transmission of HIV
•Sexual Contact: Male-to-male
Male-to-female or vice versa
Female-to-female
•Blood Exposure: Injecting drug use/needle sharing
Occupational exposure
Transfusion of blood products
•Perinatal: Transmission from mother to baby
Breastfeeding
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18. Routes of Transmission of HIV
Occupational TransmissionOccupational Transmission
Health care worker/ hospital staff
Laboratory workers
Other routesOther routes
Organ transplantation
Artificial insemination
Needle-prick
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20. HIV Transmission
Common body fluids that are means of
transmission:
Blood
Semen
Vaginal Secretions
 Breast Milk
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21. HIV in Body Fluids
Semen
11,000
Vaginal
Fluid
7,000
Blood
18,000
Amniotic
Fluid
4,000
Saliva
1
Average number of HIV particles in 1 ml of these body fluids
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22. HIV-Infected T-Cell
HIV
Virus
T-Cell
HIV Infected
T-Cell
New HIV
Virus
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23. Window Period
This is the period of time after becoming
infected when an HIV test is negative.
90 percent of cases test positive within
three months of exposure
10 percent of cases test positive within
three to six months of exposure
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24. Signs And Symptoms
The clinical consequence of HIV infection comprises of a
spectrum ranging from an acute syndrome with primary
infection to a prolonged asymptomatic stage to adanced
disease.
Incubation period: 2 to 10 yrs.
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25. Pictur e 4
The Acute HIV Syndrome
Follows 3-6 wks following primary infection
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26. Signs And Symptoms
Second phase-
Asymptomatic contact
Initial HIV inf. or after illness of inf.
No symptoms
Last 2 to 10 yrs.
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27. Signs And Symptoms
Third phase-
PGL (Persistent Generalized Lymphadenopathy)
•Enlargement of lymph nodes.
outside the inguinal area
more than 2 areas
more that 3 months
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28. Signs And Symptoms
Fourth phage-Overt Manifestation of AIDS
ARC(AIDS-related complex): fever, loss of
weight, anorexia, diarrhea plus PGL
Nervous system symptoms: headache,
convulsion, paralysis, progressive
dementia
Rare opportunistic infection.
Unusual malignant tumors.
Pneumonia.
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29. HIV Infection And Antibody Response
6 month ~ Years~ Years~ Years~ Years
Virus
Antibody
Infection
Occurs
AIDS Symptoms
Initial Stage------------------------Intermediate or Latent Stage----------------- Illness Stage
Flu-like Symptoms
Or
No Symptoms Symptom-free
<
----
----
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30. Common manifestation of AIDS
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32. Kaposis sarcoma
Candidiasis Of Mouth
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33. Extreme Wt loss
Lymphadenopathy
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34. P. Carinii pneumonia
Primary CNS Lymphoma
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35. AIDS Worldwide
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36. AIDS
In
India
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37. Prevention Of HIV/AIDS
Risk factors
Anyone of any age, race, sex or sexual orientation can
be infected with HIV, but you're at greatest risk of
HIV/AIDS if you:
Have unprotected sex with multiple partners. Unprotected sex
means having sex without using a new latex or polyurethane
condom every time.
Have unprotected sex with someone who is HIV-positive.
Have another sexually transmitted disease, such as syphilis,
herpes, Chlamydia, gonorrhea or bacterial vaginosis.
Share needles during intravenous drug use.
Received a blood transfusion or blood products before 1985.
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38. Prevention Of HIV/AIDS
Newborns or nursing infants whose mothers tested
positive for HIV but did not receive treatment also are at
high risk.
Fastest growing method of HIV transmission:
heterosexual contact.
Heterosexual transmission is easier from men to women
than from women to men
Risk of acquiring for men is greater if contact occurs
during menstruation
Uncircumcised men are more likely to be seropositive
and contract HIV during sex
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39. Prevention Of HIV/AIDS
•If mother is HIV positive, 100% of children will
test positive at birth
•Breast feeding increases transmission
rate
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40. Prevention Of HIV/AIDS
There's no vaccine to prevent HIV infection and no cure for AIDS.
Prevention includes educating yourself about HIV and avoiding any
behavior that allows HIV-infected fluids — blood, semen, vaginal
secretions and breast milk — into your body.
HIV-negative Individual prevention:HIV-negative Individual prevention:
•Educate yourself and others. Educate yourself and others.
•Know the HIV status of any sexual partner.
•Use a new latex or polyurethane condom every time you
have sex.
•Consider male circumcision.
•Use a clean needle.
•Be cautious about blood products.
•Get regular screening tests.
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41. Prevention Of HIV/AIDS
HIV positive individual prevention:
Follow safe-sex practices.
Tell your sexual partners you have HIV.
If your partner is pregnant, tell her you have HIV.
Tell others who need to know.
Don't share needles or syringes.
Don't donate blood or organs.
Don't share razor blades or toothbrushes.
If you're pregnant, get medical care right away.
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43. Prevention Of HIV/AIDS
Traditionally, prevention is described as being
at three levels:
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44. Prevention Of HIV/AIDS
Traditionally, prevention is described as being
at three levels:
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45. Prevention Of HIV/AIDS
Traditionally, prevention is described as being
at three levels:
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47. Two Approaches To Disease Prevention
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48. Risk Avoidance & Risk Reduction
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49. What is the ABC Approach?
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50. ABC Strategy
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