What are some diseases that you can get? What are the symptoms of these diseases?

What lifestyle factors might affect how often someone gets sick or how quickly they recover from illness?

Figure 9.3, pg Let’s identify the many factors that can lead to gum disease…gingivitis.

Bacteria Bacteria reproduces rapidly in an ideal environment. What do you think this environment includes?

Louis Pasteur -made many contributions to microbiology and medicine. -discovered that microbes cause disease and that weakened forms of a pathogen could be used to immunize against the pathogen -developed the process we call pasteurization to destroy pathogens in wine and milk -developed techniques to vaccinate animals against rabies and to treat humans -recommended changes in hospital practices to control the spread of pathogens.

Robert Koch -Identified pathogens that cause disease. -He and his colleagues identified more than 20 pathogens responsible for disease Such as tuberculosis, typhoid, diphtheria, tetanus, meningitis, plague, influenza, Cholera, and anthrax. -Discovered that bacteria could spread from one person to another. -Developed techniques for studying and culturing bacteria. (developed a gelatin beef-broth Solution to culture bacteria, now known as agar