Objectives: Define the term emerging disease Identify five reasons why diseases emerge

What is an Emerging Disease? -Example? Epidemic- an unusually high occurrence of a disease in a certain place during a certain time period. Pandemic- when a epidemic affects many areas of the world.

Emerging Diseases- infectious diseases that has become increasingly common in humans within the last 20 years or threatens to become more common in the near future. Chart on pg. 567 Avian FluSARSYellow Fever Dengue FeverWest Nile Virus

Why do Diseases Emerge? -reminder that the human immune system is in a never-ending battle with pathogens. Diseases can emerge: -when humans come into contact with infected animals -pathogens become resistant to existing medications -people lack appropriate immunizations They spread quickly due to more international travel and a global food supply.

Contact with Infected Animals: -Avian Flu- caused by a virus that infects certain birds. -Ebola- virus carried by bats and primates, disease passed between people.

Drug Resistance- -some diseases are caused by pathogens that can mutate, or change, over time. These mutations result in a strain of pathogen that no longer responds to medicine. Example- Tuberculosis

Drug Resistance: -

Lack of Immunization- -without proper immunization, diseases that were common years ago can once again become a threat. International Travel- -Globalization? -pathogens travel around the world with people who may not know they are sick. Global Food Supply- -food from around the world -Example- Mad Cow Disease

Comparison Numbers: The State of Michigan 2014 = 9,909,887 Grand Rapids = 193,792