|
Below is an article by
Joie Power, Ph.D. on the antiviral properties of essential oils
and a discussion of any implications for the prevention of SARS
and other viruses. The article specifically addresses research
concerning the effectiveness of essential oils against viruses and
the possibility that they might also prove effective in offering
some degree of protection against the SARS virus.
Black Hills Herbs &
Aromatherapy now carry the B-Well Essential Oil Blend.
This blend contains
those essential oils which have been identified through research
and/or herbal lore as having antiviral properties and which are
safe for general use. B-Well
Essential Oil Blend© is made with a potent combination
of essential oils described in herbal lore and/or cited in various
research studies as having antiviral properties. For more
information on B-Well Essential
Oil Blend© see the information at the end of this
article.
|
WHAT IS SARS?
SARS (Severe Acute Respiratory Syndrome) is a highly contagious,
pneumonia-like respiratory virus which is now known to be caused
by a new variant of the coronavirus. Named for their distinctive
crown-like appearance, coronaviruses have been known for some time
to be a cause of upper-respiratory illnesses, including the common
cold, and occasionally, pneumonia. These viruses are very common
and appear throughout the world. In the past, most respiratory
illnesses arising from coronaviruses have been relatively mild and
self-limiting, with fatalities confined to persons already in poor
health at the time of infection. In contrast, the new coronavirus
which produces SARS has resulted in fatalities in previously
healthy persons.
The first SARS cases
were recognized in February, 2003 and as of April 16, 2003 there
were over 3000 known cases worldwide, with about 159 fatalities.
Mainland China and Hong Kong have reported the greatest number of
cases, followed by Singapore, Canada, the United States and
Vietnam. Cases have also been reported in France, Germany,
Indonesia, Japan, Italy, Kuwait, Ireland, Sweden, Switzerland,
Spain, Thailand, South Africa, Malaysia, and the Philippines. To
date, there have been no confirmed deaths from SARS in the US;
otherwise, mortality rates vary from about 4% to 10% in other
parts of the world. As of this writing, the mortality rate appears
to have been highest in Canada.
HOW SARS IS
SPREAD. SARS, like
other respiratory illnesses, appears to spread through contact
with infected persons. The virus is aerosolized in droplets of
fluid expelled when a victim sneezes or coughs and is then
breathed in by others in the immediate area. The CDC reports that
it is also possible that it can be spread more broadly through the
air or by touching an object that has been contaminated.
Epidemiologists with the World Health Organization have stated
that there may be other means of environmental transmission as
well. CDC and WHO have developed recommendations for healthcare
workers in contact with SARS patients which include the use of
N-95 respirators, eye protection, and disposable gowns and gloves,
in addition to standard procedures for infectious illnesses (hand
washing, etc.). Guidelines for SARS patients and their family
members include face masks; frequently washing and disinfecting
hands, clothing, bedding, and household surfaces; and, no sharing
of food and items. As concerns about this illness have spread, the
use of face masks has become common in public places in some
countries. Many travel advisories have also been issued and travel
to areas of China and Canada has drastically decreased.
TREATMENT OF SARS:
Although modern medical science has developed effective treatment
for many bacterial infections, there are few effective antiviral
drugs and none that are known to act specifically against SARS. At
present, the mainstream medical approach for dealing with SARS has
been to provide supportive treatment (which may include
interventions such as draining fluid from the lungs); antibiotics
to control secondary bacterial infections; steroids to help
control some of the symptoms of SARS; and the use of existing
antiviral agents in hopes that they may have some effect.
AROMATHERAPY AND
SARS. Although
modern pharmacological science has produced many effective
antibiotics for combating bacterial infections, it has been far
less successful in developing useful antiviral agents, or
"viricides". Viruses are many hundreds of times smaller than
bacteria and could not even be seen until the development of the
electron microscope. Viruses are also harder to kill because they
are not exactly alive in the first place. Unlike the bacterium,
which is a living cell that has all the biological "machinery" for
carrying out life processes, including reproduction, a virus is
nothing more than a single or double strand of RNA or DNA wrapped
in a coat of protein. The virus may lie dormant in the air, soil,
water, or fecal matter for some time before entering a host where
it can immediately or eventually reproduce itself in a destructive
way. The immune system rallies to fight off viruses just as it
does bacteria or any foreign invader (such as a transplanted
organ). In the case of viruses that produce the common cold,
measles, or some forms of pneumonia, the immune system of a
relatively healthy person is able to fight off the virus. In most
cases, SARS patients are also able to overcome the virus and
survive but in about 4 to 10% of cases the infection overwhelms
the body's defenses and the patient dies.
Jane Buckle, author
of Clinical Aromatherapy in Nursing, quotes an article from
the science pages of the Economist Magazine saying that "no viral
epidemic has ever been stopped by drugs". She goes on to say that
synthetic viricides are difficult to manufacture and that none
appear to be totally effective and are accompanied by moderate to
severe side effects. Since new viruses appear all the time from
unknown sources and since mainstream treatments are lacking, viral
diseases represent a significant threat to health worldwide.
The effectiveness of
some essential oils as both antibacterial and antiviral agents has
been reported for a very long time. During the bubonic plague
(caused by the Yersinia pestis bacillus) that swept through Europe
in the Middle Ages, killing more than 30% of the population in
affected areas, it was observed that people who worked in the
lavender distilleries and in other industries using essential oils
rarely contracted the disease. Several recipes for preventing
plague with essential oils became popular during this time and it
was common for people to carry bundles of dried herbs mixed with
essential oils on their person. In addition to lavender, cedarwood
and cypress were often used. While certainly of interest,
anecdotal evidence of this kind is not scientific. In more
modern times, anecdotal evidence for the effectiveness of
essential oils against both bacteria and viruses has steadily
accumulated and, to some more importantly, proper scientific
investigations have been conducted since the 1950's.
A number of
essential oils have been shown in scientific research studies to
have actions against a variety of viruses including Herpes Simplex
I, Herpes Zoster (shingles), some strains of influenza virus,
adenovirus, glandular fever, viral enteritis, viral enterocolitis,
viral hepatitis, viral neuritis, polio, cowpox, human rhinovirus
Type II, Newcastle Disease, mumps, parainfluenza virus 1,2, and 3,
and even HIV-1. Specific essential oils have been shown to act
against specific viruses. For example, essential oil of Houttynia
cordata was shown in a 1994 Japanese study to have remarkable
effects against HIV-1 but no effects against polio or
coxsackievirus).
Writing in 1980, the
famous French surgeon, Dr. Jean Valnet, reported his clinical
success in treating serious cases of shingles and influenza with a
mixture of essential oils. Some of the oils he mentions include
pine, thyme and lemon which are widely used as antivirals in
clinical aromatherapy practice today. During the 1990's Dr.'s
Franchomme and Peneol also reported clinical success in the use of
essential oils against viral infections.
In some studies,
specific components of essential oils have been isolated and found
to have antiviral properties. These include, among others,
anethole, carvone, beta-caryophyllene, citral, eugenol, limonene,
linalool, and linalyl acetate. Several methods of antiviral action
have been proposed for essential oils and essential oil
components. For example, investigators have hypothesized that some
essential oils interfere with surface glycoproteins in the viral
envelope, thus preventing attachment of the virus to host cells.
Other essential oils are believed to attack viruses in the host
cells, possibly at the level of the cell membrane. Of course, many
essential oils are well known for their ability to stimulate the
immune system and may offer some indirect protection against viral
infection through these effects.
Dr. Franchomme has
suggested that coated viruses (those with an external lipid layer)
are sensitive to those essential oils which have high levels of
mono-terpene alcohols and phenols whereas uncoated viruses are
sensitive to oils high in terpenoid ketones. Peneol suggests
further that essential oils alter the pH and electrical resistance
of the body in a way that is less favorable to viruses. Concerning
the prevention and treatment of the flu, he suggests that if
essential oils are used externally right at the onset of symptoms,
the influenza can be stopped on the first day. He also suggests
external use of essential oil blends as a preventative measure.
***Although the
research demonstrating the antiviral effects of essential oils
seems to have been largely ignored by mainstream American
medicine, it has not been ignored by companies in Europe involved
in the development of natural alternatives to synthetic medicines.
Patents have been filed abroad for antiviral preparations based on
essential oils and commercial antiviral preparations employing
essential oils have been available for some time.
ESSENTIAL OIL
BLENDS FOR SARS:
What does this means for the current outbreak of SARS? Since
SARS has only recently appeared, there have not been any studies
which have examined the effectiveness of essential oils against
this virus. Thus it cannot be said at this time that
essential oils have any action against SARS. However, since
essential oils have been shown to have effects against a very wide
range of other viruses and are also known to be immune systems
stimulants it is possible that some essential oils may also prove
to be of help in reducing the spread of SARS. Given the present
situation, there is an urgent need for research to determine the
effectiveness of essential oils against SARS. Since the action of
essential oils against viruses appears to have a marked degree of
specificity (in other words, since only certain oils act against
certain viruses), a wide range of known anti-viral essential oils
should be investigated, as well as various blends of essential
oils. In dealing with viral infections in general (flu, colds,
etc.), clinical Aromatherapists most often utilize blends of
essential oils, rather than single oils. In order to be safely
employed by many people, any essential oil blend needs to be free
from those essential oils that are known to produce a high
frequency of allergic reactions or to have other undesirable side
effects. One of the great advantages of using essential oils is
that they can be used externally, either by diffusing them into
the air in the home or clinic; by applying them to the body in a
massage oil; or by applying a drop to a face mask. Special nasal
inhalers are also available. These are small clips that fit into
the nose and protect the skin from contact with the oil.
****!!!!All persons who choose to
use any essential oil blend in SARS affected areas are advised to
follow all other recommended and common sense precautions for
avoiding the spread of SARS since scientific studies have not yet
been conducted to determine the effectiveness of essential oils
against SARS virus.!!!!!****
Black
Hills Herbs & Aromatherapy
Black Hills Herbs &
Aromatherapy now carries this blend.
B-Well Essential Oil Blend.
This blend contains those essential oils which have been
identified through research and/or herbal lore as having antiviral
properties and which are safe for general use. The oils have been
blended in specific proportions to create a very special
alternative approach to wellness. No scientific studies have been
conducted utilizing this specific blend of essential oils to
determine its effectiveness for any use.
Made with a potent
combination of essential oils described in herbal lore and/or
cited in various research studies as having antiviral properties.
B-Well Essential Oil Blend©
is not taken internally rather, it is dispersed into the
environment, worn on a face mask or clothing, or diluted with
vegetable oil and applied to the body.
Joie Power, Ph.D. practices as a
Wellness Consultant, Healer, Reiki Master, and Personal Development
coach. She is a retired neurobehavioral specialist with training in
the neurological aspects of olfaction (smell) and emotional
functioning, as well as psychoneuroimmunology, mind/body approaches,
dreamwork, and aromatherapy. She provides consultation to individuals,
physicians and holistic practitioners.
For information on contacting Dr.
Power,
click here.
|