Bacteria v. Viruses

Archaebacteria  live in extreme environments such as swamps, hydrothermal vents deep in the ocean, acidic thermal springs in the ground, and extremely salty water.

Eubacteria  live in most habitats  some cause diseases such as strep throat and pneumonia  Cyanobacteria – autotrophic Escherichia coli - heterotrophic Escherichia coli - heterotrophic

Viruses v. Bacteria  Bacteria- living microorganisms  A. Some are pathogenic (cause diseases)-+  Examples  Tetanus  Neissaria gonnorhea  Strep throat- Streptococcus pyrogenus  Anthrax- Bacillus anthracis  Pneumonia  B. Some are very useful  Decomposing dead things  Breakdown garbage in landfills  E.coli

Treatment of Bacterial Infections   Antibiotics a. combat bacteria by interfering with various cellular functions a. combat bacteria by interfering with various cellular functions b. ex) penicillin, streptomycin b. ex) penicillin, streptomycin

 Viruses- not considered living organisms; have to be inside a host cell to reproduce  A. contain DNA and RNA  B. diseases caused by viruses  HIV, chicken pox, Herpes, Flu (influenza)  C. Two ways of infecting cells  Lytic cycle  Lysogenic cycle

Viral Treatments  For viral infections, you treat the symptoms  Use vaccines and antiviral drugs for severe infections.

Avian Flu Virus

Symptoms  Symptoms in humans  Fever, cough, sore throat  Eye infections  Pneumonia  Severe respiratory diseases

Vaccines  Began testing vaccinations in April, 2005  Vaccinations must prove to be safe and effective  Vaccinations are hard to create  Virus mutates quickly