AIDS stands for “acquired immunodeficiency syndrome.” It is an
advanced stage of HIV infection. Doctors identify AIDS as having a CD4 count of
fewer than 200 cells per cubic millimeter. Also, they may diagnose AIDS if
a person has characteristic opportunistic infections, associated types of
cancer, or both. When a person with HIV does not receive treatment, AIDS
likely develops, as the immune system gradually wears down. However, advances
in antiretroviral treatments have made this progression to AIDS increasingly
less common.
Causes.
HIV
can transmit when body fluids containing the virus come into contact with a
permeable barrier in the body or small breaks in moist tissues of areas such as
the genitals.
Specifically,
HIV can transmit via:
- blood
- semen
- pre-seminal
fluid
- vaginal
fluids
- rectal
fluids
- breast
milk
The
virus cannot transmit through saliva, so a person cannot contract HIV through
open-mouthed kissing, for example.
One
of the main causes of HIV transmission is anal or vaginal intercourse. For
the transmission to happen, the people must not be using barrier protection,
such as a condom, or taking pre-exposure prophylaxis, a treatment that aims to
prevent HIV transmission among people with known risk factors. Another
main cause of HIV transmission in the country is sharing equipment for
injecting drugs. Less commonly, HIV transmits to babies during pregnancy,
childbirth, or breastfeeding. Also, there is a chance of transmission in
blood transfusions, though the risk is extremely low when blood donations are
effectively screened.
Symptoms.
Some
people with HIV have no symptoms for months or even years after
contracting the virus. Partly because of this, the people with HIV do
not know that they have it. While a person with no symptoms may be
unlikely to seek care, there is still a high risk of transmission. For this
reason, experts recommend regular testing, so that everyone is aware of
their HIV status. Meanwhile, around 80% of the people with HIV
develop flu-like symptoms around 2–6 weeks after contracting the infection.
These symptoms are collectively called an acute retroviral syndrome.
Early
symptoms of HIV may include:
- a
fever.
- chills.
- sweating,
particularly at night.
- enlarged
glands or swollen lymph nodes.
- a
diffuse rash.
- fatigue.
- weakness.
- pain,
including joint pain.
- muscle
aches.
- a
sore throat.
- thrush,
or a yeast infection.
- unintentional
weight loss, with advancing HIV.
Late-stage HIV infection.
If a person with HIV
does not receive effective treatment, the virus weakens the body’s ability to
fight infection, exposing it to serious illnesses. When CD4 cells are
severely depleted, at fewer than 200 cells per cubic millimeter, a doctor
can diagnose AIDS, which is sometimes called stage 3 HIV. The presence of
certain opportunistic infections, involving bacteria, viruses, fungi, or
mycobacteria, would also help a doctor identify AIDS.
Symptoms
of AIDS can include:
- blurred
vision.
- a
dry cough.
- night
sweats.
- white
spots on the tongue or mouth.
- shortness
of breath, or dyspnea.
- swollen
glands lasting for weeks.
- diarrhea,
which is usually persistent or chronic.
- a
fever of over 100°F (37°C) that lasts for weeks.
- continuous
fatigue.
- unintentional weight loss.
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