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What is a Microorganism?
1. Definition
2. Prokaryotic or Eukaryotic?
3. Unicellular or Multicellular?
What is a Microorganism?
1. Prokaryotic Microbes
Bacteria
Archaea
2. Eukaryotic microbes
Fungi, Algae and Protozoa
3. Viruses????
Microbes and diseases
• Infectious diseases of humans, animals and plants.
• Food Spoilage
• Can -> food poisoning
Microbes and Human diseases
• Pathogenicity of a microbe
Vs.
Resistance of the host
• Etiological agent
Microbes and Human diseases
1. Biological warfare:
Bacillus anthracis, Clostridium botulinum
2. Bacterial resistance to antibiotics.
-very big concern in modern world
3. Emerging Infectious diseases
Ability to infect different Host species
ex. Avian flu
Microbes and Human life
1. Recycling of chemical elements: N2 fixation
2. Decomposition of organic
matter: sewage treatment 3. Bioremediation: Pseudomonas
and Bacillus
Microbes and Human life
4. Insect pest control:
Bacillus thuringensis (insecticide)
5. Food industry: vinegar, wine, beer, cheese, yogurt, bread, pickles
Microbes and Human life
6. Genetic Engineering: production of proteins, vaccines, enzymes, growth hormones etc. eg. Insulin
7. Gene therapy: use of viruses to carry replacement for defective gene
8. Genomics