Bacteria in many ways to humans. They

Bacteria are microorganisms that are used widely in many
industries and are very helpful in many ways to humans. They can be used in
recombinant DNA technology which is a method used to cure genetic diseases in people.
An example is the use of the bacteria E. coli to produce insulin for people
suffering from type 1 diabetes whose beta cells of islets of Langerhans in the pancreases
cannot produce insulin. A gene that produces insulin can be extracted from beta
cells and inserted into a plasmid, a circular DNA obtained from bacteria. This
new recombinant plasmid can be inserted inside the E.coli to enable the
genetically modified bacteria to produce a lot of insulin under the right
conditions. Therefore, humans can benefit from these microorganisms in this way
because diabetic people can now have a source of insulin that aids their
survival (Sue Hocking, 2015).This method can also
be used as a way of producing the human growth hormone for people whose glands
do not produce enough of it and bacteria can also be used as well. This hormone
defiance can lead to dwarfism and other health conditions as a result using
this method will help improve the physical growth of people who are suffering
from this and it can greatly help small children who have dwarfism to grow normally
and catch up with other children (Brennan, 2017).

Virus can be used in gene therapy to deliver a desired gene
inside the human cell that will replace a faulty gene which is causing a
particular disease. The virus is first modified so that it does not cause any
harm once inside the body and the gene is then packed inside the virus (Shaffer,
Cystic fibrosis is another genetic disease that humans have tried to cure with
the use of microorganisms. This disease results from a mutated gene called CFTR.
A virus which acts as a vector carrying a functional copy of the CFTR gene can
be introduced as an aerosol spray to the cell allowing it to attach to the
surface membranes of cells lining the alveoli and inject its DNA along with the
gene inside the cell. This method of using a virus vector has been proven not
to be safe to practice yet due to some complications it can cause to the lungs,
however this method can be helpful in curing cystic fibrosis and shows how helpful
microorganisms can be to the human survival and 
also proves that they are what humans need in the future to cure diseases
that human kind had been failing to cure since their discovery and with further
research the use of virus vectors can be made safe to use in the future (CJ Clegg, 2000).

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There are many diseases that people suffer from which are
caused by the microorganism bacteria and these include urinary tract infections,
some pneumonia and many other diseases. However, these diseases can be treated
with the use of antibiotics which are produced by other microorganisms like
fungus and bacteria. These antibiotics are able to slow down the growth of the
bacteria or even destroy it. When provided with the right growth conditions these
microorganisms can produce the antibiotics needed to cure diseases, examples
include the fungus Penicillium which produces the antibiotic penicillin and
Streptomyces which produces streptomycin. This is another way in which the
medical industry makes use of microorganism and goes on to show how vital these
microorganisms are to humans in the planet, because without them human kind
would be struggling to find ways to cure a lot of diseases that would otherwise
be easy to cure with the use of microorganisms.

Microorganisms are also widely used in the food industry to
make different kinds of food like cheese, yoghurt, bread, alcoholic beverages
and single cell protein (SCP).The production of cheese and yoghurt mainly
depends on the use of bacterial species which preserve the milk used and helps with
the production ,for cheese, lactic bacteria, Lactobacillus and Streptococcus
are used while for yoghurt the species Lactobacillus bulgaricus and Streptococcus
are used (Glenn, 1995). These
microorganisms play an essential role to humans because in this way people can obtain
various nutrients and salts like calcium and proteins through dairy products instead
of meat only which can also be very affordable for everyone. Bread and
alcoholic beverages production mainly depends on the fermentation of yeast to
produce carbon dioxide and ethanol which are very essential for the process
involved in the production (Glenn, 1995).  The SCP is produced by the fungus Fusarium Venenatum
and has been used as a meat substitute for vegetarians. This once again shows
the importance of microorganisms to humans because vegetarians can get direct
protein from a source which is not meat and it could be also possible to
discover some fungi that produces a protein with a similar amino acid profile to
that of animals. This is very helpful because it also prevents those that do
not eat mean from having nutrient deficiencies that can only be found in meat (Sue Hocking,


Human beings and plants also need to make proteins and
nuclei acids in their bodies and nitrogen is needed for that to happen. However,
the nitrogen in the air cannot be used directly by humans in its original form
as a result bacteria is needed so that it can convert it into nitrogen
compounds and the nitrogen can be passed in a food chain in its usable form to
humans and this happens through a nitrogen cycle. Nitrogen gas in the air is
first converted to ammonia by the bacteria Azotobacter and Rhizobium. This
ammonia can be used by plants. The nitrifying bacteria Nitrosomonas changes
ammonium ions formed through dead organisms by decomposers into nitrites and
the bacterium Nitrobacteria changes nitrites into nitrates that can be used by plants.
The bacteria species are very essential in the existence of humans because
without them humans would have no way of making proteins of nucleic acids (DNA,
RNA) which are vital to the survival of humans therefore the survival of human
kind on the planet depends on these microorganisms. It is also important that the
nitrogen gas be produced again so that the cycle can go on which is where the
denitrifying bacteria comes in because it converts nitrates in the soil into
nitrogen gas through respiration (Fullick, 1994).


Some bacteria can be very useful in agriculture and helps
in the survival of plants. The bacterium Bacillus thuringiensis produces toxins
that can kill butterfly larvae therefore this gene cab be transferred to plants
so that they can be genetically engineered to produce the toxin as well as a
result they gain protection against the damage that butterfly larvae can cause.
These could include tomatoes and tobacco as a result these microorganisms are
very helpful because this increases the yield of the crops which is very
important because decreased yields can mean shortage of resources to human kind
(CJ Clegg, 2000).

Water can also be treated and made clean for human
consumption using microorganisms. Sewage is treated with the use of bacteria
and protozoa in which the organic matter and nutrients from the sewage are used
by the microbes for their own growth and production and at the same time they
convert ammonium compounds into nitrates. This is very important to the
survival of humans because sewage water contains a lot of harmful substances
that are not suitable for human consumption however with the use of these microbes,
water treatment becomes easier and water can also be used repeatedly since sewage
can be treated and this prevents water shortage and reduces the risks of a lot
of water borne diseases (Peter Givens, 2001)..

In conclusion microorganisms have proven to be very essential
to the existence of humans in the planet and they have the potential to be even
more beneficial to humans in the future.