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biology paper 2
antibiotic resistance
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Antibiotic resistance
When
bacteria
evolve
to become able to
survive
exposure
to
antibiotics
, we say that they have
developed
Antibiotic
resistance
Describe in detail how antibiotic resistance arises.
A population of a bacteria infect somebody
That person takes antibiotics to
kill
the
bacteria
Some bacteria have a random
mutation
that makes them
less susceptible
to the antibiotic than others
The
antibiotics
kill all the bacteria except those that are
resistant
The resistance
strains
of
bacteria
now have
more resources
to grow and
multiply
More
mutations
may arise, leading to
greater resistance
There is now a strain of bacteria that can't be
killed
by
antibiotics
, which we call antibiotic
resistance
To reduce the rise and spread of antibiotic resistance, should we increase or decrease the use of antibiotics?
Decrease
use
Are antibiotics effective at treating viral diseases?
Antibiotics only kill
bacteria
, not
viruses.
If we want to reduce the rise and spread of antibiotic resistance, should doctors prescribe antibiotics for mild bacterial infections?
no
Our
bodies
can
generally
fight
mild
bacterial
infections
themselves, so we don't really
need
antibiotics.
Should you take the whole course of antibiotics, or stop taking
them
once you feel better?
Take
the
full course
It is important to take the full course so that they can
kill
all of the
bacteria.
Give 3 reasons antibiotic resistance is becoming more common.
Doctors often prescribe antibiotics in cases where they aren't
necessary.
For example, mild or
viral
infections
Many people don't take the full
course
of antibiotics, so not all the bacteria are
killed
Huge amounts of antibiotics are given to
farm
animals in order to make them grow
faster
Why is the spread of antibiotic resistance a problem?
If more
bacteria
are
resistant
to
antibiotics
, we won't be able to
treat
those
infections
This means more
people
will
die
of
bacterial
infections
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