Class Notes (835,384)
Canada (509,147)
Biology (2,228)
BIO220H1 (244)
Lecture 8

BIO220 Lecture 8.docx

2 Pages
125 Views
Unlock Document

Department
Biology
Course
BIO220H1
Professor
Doug Thomson
Semester
Fall

Description
BIO220 Lecture 8 – Deadly Viruses & The Evolution of Virulence 1918 Influenza Epidemic - The 1918 flu was a leading cause of death among all disease and infectious disease Ebola virus - First saw ebola in 1976 – outbreak and then suddenly disappeared Why is the common cold so benign when the flu and ebola are so deadly? - Conventional wisdom o Host has infection and contains replicating pathogens that replicate so they can be transmitted to another host o The highly virulent pathogens may be new to the species of host –over time a mutualistic association develops o Ex: ebola originates in bat and is a highly virulent pathogen because it keeps transferring, for example from bats to monkeys to humans SARS – - Some of the sars virus genes suggest that it is a coronavirus that crossed the species and has not coevolved Myxoma virus - Originated when Europeans brought rabbits to Australia and their population exploded o In order to control rabbit population, they created a virus that targets rabbits. o Evolution occurred in population to decrease to level of virulence o Virulence also declines over time because virus does not want to kill the host o HOWEVER, a mutual association did not occur between rabbits and virus w
More Less

Related notes for BIO220H1

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit