Slide 1 Slide 2 Slide 3  Pathogens  viruses that cause disease  Virulent  disease causing  Latent  inactive, but having the potential to be active at a…

Slide 1 Reconstructing and Using Phylogenies 16 Slide 2 Concept 16.1 All of Life Is Connected through Its Evolutionary History All of life is related through a common ancestor:…

Slide 1 The Evolution of Virulence E3: Lecture 14 Slide 2 What is Virulence? Most generally, virulence is defined as a pathogen’s ability to do damage to its host. Such…

Slide 1 Ecology of Pathogenic Microbes 1.What is ¨pathogenic?” 2.“Life cycle” of pathogenic microbes 3.How do we know if microbe causes disease? (Koch’s postulates)…

Slide 1 The Human World Slide 2  Nearly 6.5 billion people on the planet.  Inhabit only 30 percent of the planets land.  From the year 1000 to the year 1800 the…

Slide 1 BioSafety Considerations For Viral Vectors Slide 2 Biosafety Considerations of Viral Vectors n Lifestyles of the Small & Infectious n Terminology of Gene Expression…

Slide 1 Basic principles of infectious diseases The term infectious diseases applies when an interaction with a microbe causes damage to the host and the associated damage…

Slide 1 CHAPTER 25 Epidemiology Slide 2 Principles of Epidemiology The Science of Epidemiology Epidemiology is the study of disease in populations. To understand infectious…

Slide 1 Slide 2 Sect. 1 World Population More than 6.8 billion people now live on Earth, inhabiting about 30 percent of the planet’s land. Global population is growing…

Slide 1 Evolution of virulence Why are some parasites so virulent and others so mild? Slide 2 Conventional wisdom “Given enough time a state of peaceful coexistence eventually…