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Microbiology . Part I – Introduction. purpose. Why study microbiology?. Educated Future Parent. ?. Educated Patient . Curiosity . Fun Facts!. BACTERIA ARE ALMOST EVERYWHERE AND IN ASTONISHING NUMBERS!
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Microbiology Part I – Introduction
purpose • Why study microbiology? Educated Future Parent ? Educated Patient Curiosity
Fun Facts! BACTERIA ARE ALMOST EVERYWHERE AND IN ASTONISHING NUMBERS! • Organisms from Archaebacteria and Eubacteria outnumber ALL the members of the other 4 Kingdoms COMBINED • Bacteria have a greater combined weight than ALL THE OTHER LIVING organisms on earth • Bacteria THRIVE in places where no other organisms were thought to exist • A single GRAM of common soil can contain 1-100 MILLION bacteria cells • Every cubic meter of air contains 100-20,000 bacteria cells
Bacteria Facts • Most people hear the word “bacteria” and think of germs and disease • While SOME species of bacteria cause disease (pathogenic), MOST (along with Fungi) are the primary decomposers on this planet and dispose of TONS of waste • Decomposerssecrete chemicals that break down dead/decaying material so they may be reused by plants and other organisms
A few Pathogenic Bacteria… Clostridium botulinum Clostridium difficile Staphylococcus aureus Vibrio cholerae Streptococcus pneumoniae Escherichia coli Yersinia pestis
Classification • Domain Prokarya • Kingdom Archaebacteria • Kingdom Eubacteria
Kingdom Archaebacteria • 3 Main Groups: • Thermoacidophiles • Methanogens • Halophiles
Comparison – Archaebacteria and eubacteria Archaebacteria Eubacteria
Bacteria Shapes Draw shapes:
Bacterial Cell Walls and Capsules • Bacterial cell walls are made of large molecules called peptidoglycans • The thickness composition of the cell walls are unique to each species • Scientists are able to observe the thickness (and type) through a process calledGram’s Stain • On the outside of the cell walls are layers of sticky carbs called the capsule • These allow bacteria to stick to surfaces and protect the cell from bad conditions
Why are they important? • The structure of a bacteria will often dictate: • Symptoms of an infection • what antibiotic is used to treat the infection • Antibiotic used will target the cell wall/capsule to kill the bacteria
Bacteria Memory Game Play 1 round and Copy down!