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What is an Amoeba?
Amoebas
are microscopic organisms.
Many
amoebas eat bacteria and other small organisms. They ingest food and nutrients by
a process called endocytosis. Amoebas eat by stretching their plasma membrane
around food particles and enclosing the material in a vesicle. They usually
reside in warm water and in other aqueous environments.
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Amoeba
are single-celled, animal-like protists. They are very large compared
to other microscopic organisms. Some species are large enough to see with the
naked eye. They are referred to as animal-like protists because they take in particles
in order to obtain nutrients. There are also plant-like protists which obtain
their energy from photosynthesis.
Amoebas reproduce
asexually by a process called binary fission. When reproducing the amoeba
divides itself into two new organisms.
Most
amoebas are equipped with something called pseudopods. The
pseudopods allow the amoeba to move around and capture food particles.
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According
to a study of
Northern Virginia ecology by the Island Creek Elementary School, “amoebas
eat algae, bacteria, other protozoans, and tiny particles of dead plant or
animal matter.”
Amoebas are an essential part of life. They provide a source of food for filter feeders
and also control algae and bacteria populations. However, some of these
creatures don’t just feast on small organisms.
Brain Eating
A few
years ago there was an outbreak of an infection called PAM or primary amoebic
meningoencephalitis in the southern United States. This infection is
actually caused by a type of amoeba. The amoeba feeds on the cells in the
brain, sucking the nutrients out of them.
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The culprit
is Naegleria fowleri, a
species of amoeba that lives in warm, fresh bodies of water. According to WebMD, they are found
in warm lakes, ponds, muddy pools, warm shallow rivers and streams, poorly
treated swimming pools, hot springs, and runoff waste water used for cooling in
power plants.
N. fowleri thrives in
heat. The creatures are most active in high temperature
water, ranging up to 115 degrees Fahrenheit. If the temperature gets too
low, or conditions
become unfavorable in some other way, the amoeba will curl up into a cyst,
a small mass with a hard protective layer, and only emerge when the environment
is suitable.
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According
to the Stanford
University website, these creatures were officially discovered in 1965 by Dr. Fowler and Dr. Carter in
Australia. Of course it came from Australia. Everything deadly lives in
Australia.
It is
believed that the first documented occurrence
of PAM was in 1909. However, the condition is very rare. From 1962 to 2013
only 132 cases
have been attributed to Naegleria fowleri.
However, the mortality
rate is over 98%.
In the
past few years, several people died from amoeba infection. There was a 9
year old girl in Kansas who passed away after swimming in a lake near her
home.
Symptoms
of this amoeba’s presence in the body are caused by destruction of brain
tissue.
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According
to the Centers
for Disease Control and Prevention, symptoms begin to appear about 5 days
after an individual has been contaminated and include “headache, fever, nausea,
or vomiting.” Following this the condition of the individual declines and he
may experience “stiff neck, confusion, lack of attention, loss of balance, seizures,
and hallucinations.” After symptoms first reveal themselves the infected
individual usually dies in around 5 days, meaning after infection a person has about 10 days to live.
How Amoeba get in the Brain
These
amoeba rarely infect humans. However, several cases have been reported in the
southern United States.
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Naegleria fowleri usually
only get into the brain if water is forced into the nose. This can happen
during water sports, such as water skiing and diving. However according to the Centers for Disease Control and
Prevention, if water containing the amoeba is consumed, it will not enter
the brain and you will be perfectly fine. The conditions have to be just right
for the amoeba to cause PAM.
Prevention
If
you’re really worried about getting a tiny protist up your nose, the simplest solution
is to wear nose plugs while swimming or participating in water sports.
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It is
also best to use boiled water and sterile instruments if you need to use a neti
pot.
Thanks
for reading!
If
you want more information check this
out.