Class Notes (921,692)
CA (542,563)
UTSC (32,886)
Geography (721)
GGRB28H3 (121)
Torri (11)
Lecture

in class lecture note

2 Pages
73 Views

Department
Geography
Course Code
GGRB28H3
Professor
Torri

This preview shows half of the first page. Sign up to view the full 2 pages of the document.
L09 Influenza
- respiratory infection transmitted via respiratory secretions with incubation of ~1-5 days
- seasonal December/March survives better in dry environments with little sun
- symptoms: fever, chills, body aches, sore throat, non-productive cough, runny nose,
headache [may lead to respiratory problems/pneumonia
- people who have weak immune system, infants, pregnant women, more subject
- Spanish Flu mainly affected people ages 20-25
- Type A: most virulent, accentuates and mutates
- Type B: only affects humans
- Type C: humans & some animals (dogs/pigs)
- antigenic shift (evolution of subtypes)
- zoonosis: transmission of virus between species (e.g. pigs to humans, or pigs to birds)
- Avian influenza (amongst birds), Pandemic influenza (causes global outbreak), Seasonal
influenza
Avian Influenza
- type A affects domestic and wild species
- capable of killing, <50% of those who contract it will die
- occurs when human/bird contact increases but does not transmit human to human
- aquatic birds are natural reservoirs --- can affect chickens/turkeys
- 218 poultry cases from 2003-2006, >124 human deaths (deaths in ferrets, felids, domestic
cats)
- high density spreads influenza [poultry centres co-located with humans]
Increased prevalence due to..
- spread via bird saliva, nasal secretion, feces, contact with humans/poultry
- increase in poultry exportations/importations [centres tried to tackle the Avian flu by killing
poultry given subsidies]
- usually death within 10 days lethal but uncommon
- poor sanitary infrastructure
- planetary overload
Pandemic Influenza
- rare but recurrent all over the world (widespread) approximately 3 every century
- another pandemic may be imminent, medical supplies will be inadequate to supply to all
- economic/social disruption every country must be prepared
Æ climate change created anomalies in people
Stages of pandemic
- phase 0 interpandemic phase
- phase 1 novel influenza virus causing outbreaks in at least 1 country, high
morbidity&morality
- phase 2 outbreaks and epidemics with global spread
- phase 3 end of first pandemic wave
- phase 4 possible second wave
- phase 5 pandemic ends, high immunity
Interpandemic period
- phase 1 no new virus subtypes in humans
- phase 2 circulating animal influenza virus (posing substantial risk)
Pandemic alert!
- phase 3 human infection with new subtype but no/limited human to human spread
- phase 4 small clusters/localized infections
- phase 5 large clusters suggesting better adaptation to humans
www.notesolution.com

Loved by over 2.2 million students

Over 90% improved by at least one letter grade.

Leah — University of Toronto

OneClass has been such a huge help in my studies at UofT especially since I am a transfer student. OneClass is the study buddy I never had before and definitely gives me the extra push to get from a B to an A!

Leah — University of Toronto
Saarim — University of Michigan

Balancing social life With academics can be difficult, that is why I'm so glad that OneClass is out there where I can find the top notes for all of my classes. Now I can be the all-star student I want to be.

Saarim — University of Michigan
Jenna — University of Wisconsin

As a college student living on a college budget, I love how easy it is to earn gift cards just by submitting my notes.

Jenna — University of Wisconsin
Anne — University of California

OneClass has allowed me to catch up with my most difficult course! #lifesaver

Anne — University of California
Description
L09 Influenza - respiratory infection transmitted via respiratory secretions with incubation of ~1-5 days - seasonal DecemberMarch survives better in dry environments with little sun - symptoms: fever, chills, body aches, sore throat, non-productive cough, runny nose, headache [may lead to respiratory problemspneumonia - people who have weak immune system, infants, pregnant women, more subject - Spanish Flu mainly affected people ages 20-25 - Type A: most virulent, accentuates and mutates - Type B: only affects humans - Type C: humans & some animals (dogspigs) - antigenic shift (evolution of subtypes) - zoonosis: transmission of virus between species (e.g. pigs to humans, or pigs to birds) - Avian influenza (amongst birds), Pandemic influenza (causes global outbreak), Seasonal influenza Avian Influenza - type A affects domestic and wild species - capable of killing, <50% of those who contract it will die - occurs when humanbird contact increases but does not transmit human to human - aquatic birds are natural reservoirs --- can affect chickensturkeys - 218 poultry cases from 2003-2006, >124 human deaths (deaths in ferrets, felids, domestic cats) - high density spreads influenza [poultry centres co-located with humans] Increased prevalence due to.. - spread via bird saliva, nasal secretion, feces, contact with humanspoultry - increa
More Less
Unlock Document


Only half of the first page are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Don't have an account?

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