Germ Theory Flashcards
what happened in 1830?
a microscope was invented that could magnify up to 1000x
what is spontaneous generation?
micro-organisms appeared when something decayed
what was miasma?
the belief that disease was caused by bad smells
who began questioning the theory of spontaneous generation?
french scientist, Louis Pasteur
when did Louis Pasteur begin questioning spontaneous generation?
1850s
what did Louis Pasteur conclude about germs?
they werent the product of decay but responsible for it
how did Louis Pasteur prove germs came from the air?
he put a nutrient rich broth into a swan neck flask and discovered if he kept air out, the broth would be preserved, but if he broke the flask, the liquid quickly went sour
when was germ theory published?
1861
what did germ theory state?
micro-organisms already existed in the air and dust spores, there were more micro-organisms in some parts than others, microbes can decay, microbes can be killed by heating
what is pasteurisation?
slow heating liquids to kill microbes
what did Pasteur conclude in 1865?
germs and micro-organisms might be responsible for making humans ill
how does pasteurisation help in the long term?
it makes milk safer to consume
what vaccine did Louis Pasteur discover?
a vaccine for chicken cholera which was a huge problem for french farmers at the time
who discovered the chicken cholera vaccine?
Charles Chamberland by chance
what did Pasteur discover about vaccines?
that if they weakened the germs, they wouldnt kill but cause immunity
