Transcript alexander fleming

“Look at the weebeasties.”
or a visit to the
Microorganism Hall
of Fame
This presentation
honors those great
people who helped
us learn about
microorganisms.
Microorganisms
were unknown
prior to the
1670’s.
How did we discover
microorganisms?
First, we had
to have a
microscope.
Our first
member of the
Hall of Fame…
Zacharias Janssen
Invented the
microscope in
1595.
It was considered a
“toy” for the rich.
Zacharias Janssen
Anton van
Leeuwenhoek
In 1680, Anton
van Leeuwenhoek
improved the
microscope.
He called the small
creatures he saw through
the microscope
“animalcules” (Little
animals).
What he saw were
bacteria and
protozoans.
Click here for Understanding:
Anton van Leeuwenhoek.
Anton van
Leeuwenhoek
Edward Jenner
Developed the first
vaccine in the
1790’s.
Milk maids who had “cow
pox” did not develop
smallpox.
Click here for Edward Jenner:
Smallpox Vaccine.
Edward Jenner
Oliver Wendell
Holmes and Ignaz
Semmelweis
Prior to the 1840’s, many
women died after childbirth
from Child Bed Fever.
They realized Child Bed Fever
was caused by dirty hands.
Washing hands solved the the
problem and saved lives.
Click here for Louis Pasteur –
Mini Biography.
Oliver Wendell
Holmes and Ignaz
Semmelweis
Joseph Lister
People got sick and many
died after operations.
First used antiseptics and
disinfectants in the operating
room in the 1860’s.
Joseph Lister
Louis Pasteur
Proved all organisms came
from other living things.
Showed microorganisms can
be killed by heat
(Pasteurization).
Did his work in the 1860’s –
1880’s.
Click here for 100 Greatest
Discoveries: Germ Theory.
Louis Pasteur
Robert Koch
In the 1870’s, he proved
that germs caused
disease.
Robert Koch
Sir Alexander
Fleming
Discovered the “miracle
drug,” penicillin in 1928.
Click here for 100 Greatest
Discoveries: Penicillin
Development.
Sir Alexander
Fleming
These are the
members of the
Cell Hall of Fame.