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Severe Acute Respiratory Syndrome (SARS)
Michael Lam, MD, MPH www.DrLam.com
(READING TIPS: For
fast reading, scan through the topic headings in BOLD BLACK, important conclusions
in BOLD BLUE,
and " Must Know " in BOLD RED. To jump to specific sections in this article, click on
the respective LINKS in the Contents.)
| Before You Begin
Information presented here is for general
educational purposes only. Each one of us is biochemically and metabolically
different. If you have a specific health concern and wish my personalized
nutritional recommendation, write to me by clicking
here. |
Contents
Symptoms
Incubation Period
Transmission
Is There A Test for SARS
What Should I Do If I Think I Have SARS
Immune System 101
Immune Support Nutraceuticals
1. Cat's Claw (Una De Gato)
2. Olive Leaf
3. Fish Oil
4. Medical Mushroom
5. Vitamins
What Else Can You Do To Increase Your Immune System
A. Stress Reduction
B. Exercise
C. Diet
A profoundly threatening new epidemic, easily transmissible
and capable of killing up to 6 percent of the people who
contract it, emerged out of nowhere in November 2002, spreads
through populous China, and then speeds around the world at lightening speed.
Each year, we experience various new strains of viruses that cause the common
cold. What is so special about the SARS virus is that it is much more deadly.
SARS is caused by a coronavirus. Coronaviruses
are a group of viruses that have a halo or crown-like (corona) appearance
when viewed under a microscope. These viruses are a common cause of up to
1/3 of mild to moderate upper-respiratory illness in humans and are associated
with respiratory, gastrointestinal, liver and neurological disease in animals. Coronaviruses generally do not cause severe debilitative diseases, although
they have occasionally been linked to pneumonia in humans, especially people
with weakened immune systems.
The viruses also can cause severe disease in animals, including cats, dogs,
pigs, mice, and birds. The SARS coronavirus
is likely to have originated in animals that subsequently passed it to humans.
Therefore, we do not have the built up immune system and antibodies to combat
it.
Symptoms
The
illness usually begins with a fever (measured temperature greater than 100.4°F [>38.0°C]).
The fever is sometimes associated with chills or other symptoms, including
general feelings of discomfort, headache, and body aches. Some people
also experience mild respiratory symptoms at the outset.
After 2 to 7 days, SARS patients may develop a dry, nonproductive cough
that might be accompanied by or progress to the point where insufficient
oxygen is getting to the blood. In 10 percent to 20 percent of cases, patients
will require mechanical ventilation.
Incubation Period
The incubation period for SARS is typically 2
to 7 days. There have been reports, however, of incubation periods
as long as 10 days.
Transmission
The primary way that SARS appears to spread is by close
person-to-person contact. Most reported cases of SARS have
involved people who cared for, lived with someone with SARS, or had direct
contact with infectious material (for example: respiratory secretions from
a person who has SARS). Common ways in which SARS can be spread include touching the skin of other people or transmission through
infectious droplets and then touching the eye(s), nose, or mouth. This can
happen when someone who is sick with SARS coughs or sneezes droplets onto
themselves, other people, or nearby surfaces.
In general, enveloped viruses such as coronaviruses do not last a long time
in the open air and die quickly, in a matter of a few hours. The
SARS coronavirus may be different and may be able to survive as long as
24 hours in the open environment. It is not uncommon for
respiratory viruses to be found in feces for a period of time. Some laboratories
in the WHO network have reported finding the new coronavirus in stool specimens.
Is there a test for SARS?
No "test" is available yet for
SARS at this time.
What should I do if I think I have SARS?
If you are sick with a fever greater than 100.4°F (>38.0°C) that is accompanied
by a cough or difficulty breathing, you should (together with your travel
or exposure history if any to SARS inflicted people) consult a health-care provider.
It is important to remember that the vast
majority of infected people do not die from this virus. The key determinant
is the immune status of the individual. A body with a strong
immune system is able to fight the SARS virus. The infected person
may have some symptoms, but complete recovery can be expected with supportive
therapy. On the other hand, if the immune system is sub-optimal, the
body will easily succumb to the SARS virus, potentially resulting in death.
The key to prevention or overcoming SARS lies in having a strong immune
system. Let us look now at how the immune system works.
IMMUNE SYSTEM 101
In our immune system there are two important elements called T- and B-lymphocytes.
B-lymphocytes make and distribute antibodies in our bodies.
There are many different forms of antibodies. They are classified
into five major classes: IgA (immunoglobulin A), IgD, IgG, IgM, and IgE.
Each class has its own function. They work together to ensure that all foreign
bodies are destroyed.
T-lymphocytes are in charge of the cell's immunity. They act
as a command post from which most orders for the immune system flow, as
well as stimulating macrophages and B-lymphocytes. T-lymphocytes are the
pillars for protecting the body from diseases such as bacterial infections,
strong viruses, fungi, cancer, and parasitic infections.
These T-lymphocytes are assisted by a group of T-helper cells. They
help to control various white blood cells by issuing chemical codes known
as cytokines. Some examples are interleukins and interferons. T-helper
cells coordinate the efforts of white blood cells and destroy unwanted substances.
Our bodies also manufacture T-suppressor cells to slow down the destructive
activities of cytokines from other white blood cells. This is an important
function, as it serves to protect the host. The correct ratio of T-helper
to T-suppressor cells is crucial. It maintains a balance between the
aggressive actions to destroy bad cells while protecting the good cells.
Today, biology's greatest achievements have brought about much research
into some of the immunity boosting agents derived from natural sources.
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