Download Document

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Cyanobacteria wikipedia, lookup

Biofilm wikipedia, lookup

Skin flora wikipedia, lookup

Bacteriophage wikipedia, lookup

Bacteria wikipedia, lookup

Neisseria meningitidis wikipedia, lookup

Small intestinal bacterial overgrowth wikipedia, lookup

Bacterial taxonomy wikipedia, lookup

Bacterial cell structure wikipedia, lookup

Human microbiota wikipedia, lookup

Bacterial morphological plasticity wikipedia, lookup

Transcript
Microbes
(Prokaryotes!)
Laboratory 8
Biology 101
Three domains of life: two are prokaryotic
Prokaryotes
An organism that lacks a membrane-enclosed nucleus
and other membrane-enclosed organelles
Prokaryotes
An organism that lacks a membrane-enclosed nucleus
and other membrane-enclosed organelles
Bacteria
• Unicellular microorganisms
• a few micrometers in length
• Numbers…
• 40 million bacterial cells in a gram of soil
• 1 million in a milliliter of freshwater
• Approximately 10x as many bacterial cells as human cells in the
human body – most on skin & digestive tract
• Approximately 5 nontrillion (5 x 1030) on earth!
5,000,000,000,000,000,000,000,000,000,000
Where are bacteria found?
• EVERYWHERE!
• In the soil and water
• On and in our bodies
• In the air we breathe
• Critical to nutrient cycling as decomposers
• Some cause disease
• Vast majority are harmless, but half of all human diseases
are caused by bacteria
Anatomy of a Bacterium
• Some examples of
differences between
bacteria and
eukaryotic cells?
• Cell wall
• Capsule
• Ribosomes
• How could these
differences help fight
disease?
Types of microbial metabolism
Sickness: bacterial or viral?
Often similar symptoms with different pathways
Viruses are FAR more common
Antibiotic Resistance –
take all of your antibiotics, or else….
So what is a virus? (hint: It’s NOT a bacteria)
- non-living
- very small
- uses lipids and proteins taken from host
Ebola Virus – named after the Ebola River
Today in lab:
Bacterial Shapes
Colony Shape
Colony Color