1. The Role of Bacteria in Infection M. Stafford

2. Standard and ESLR There are important differences between bacteria and viruses and the body’s defense against disease organisms To be a complex thinker

3. What is a Prokaryote? Unicellular Lacks a nucleus Small 1-5 micrometers

4. Bacteria are Examples of Prokaryotic Cells Two Kingdoms Eubacteria – found everywhere Archaebacteria – found in harsh environments

6. Shapes of Bacteria

7. Growth and Reproduction Binary Fission Conjugation Spore Formation - endospore

8. Importance of Bacteria Producers Decomposers Many human uses Soil bacteria

9. Bacteria and Disease Some use cells for food Example Mycobacterium causes tuberculosis

10. Some release toxins Example – Streptococcus Releases a toxin that can cause a rash and scarlet fever

11. Diphtheria – Corynebacterium diphtheria infects the throat and releases toxins into the bloodstream. Destroys tissues can cause heart failure, paralysis and death

12. Preventing Bacterial Disease Your first line of defense against bacterial infection is your skin Wash your hands

13. Preventing Bacterial Disease Vaccine – a weakened or killed pathogen that is used to stimulate the body’s immune system Antibiotic – blocks the growth and reproduction of bacteria

15. Fleming - penicillin

16. Control of Bacteria Sterilization by heat Disinfectants Food storage and processing

17. Video – Killer microbe 8 minutes