Infectious Disease (guest lecturer)TEST 3

Question 1

Epidemiology

Answer 1

study of distribution of determinants in population and application of these determinants to control health

Question 2

In Sub Saharan Africa, what are the leading causes of death?

Answer 2

AIDS and Tuberculosis

Question 3

Is HIV a disease or a pathogen?

Answer 3

Pathogen

Question 4

AIDS?

Answer 4

Disease

Question 5

Ro

Answer 5

The basic reproductive number: Average number of people an infected person can infect before they recover or die

Question 6

Pathogen

Answer 6

org. that causes disease

Question 7

Infection

Answer 7

replication of pathogens inside org

Question 8

Disease

Answer 8

Change from normal phsyio to bad

Question 9

If R0 is less than 1 what happens to the disease?

Answer 9

It dies out

Question 10

If Ro is more than 1 what happens to disease

Answer 10

It persists

Question 11

Equation for Ro?

Answer 11

infectious contact rateXduration of infection

Question 12

Ro of sneezing on someone=

Answer 12

probability being sneezed on will lead to infectionXdays you are sneezing

Question 13

What is the main thing to consider when looking at Ro?

Answer 13

The generation time of the infection!(time between getting infection and being able to infect someone else)

Question 14

Reff

Answer 14

Reproductive number (consiers amount of people actually suseptible to the infection

Question 15

If R0=4 how many people do we need vacinnated to stop the disease?

Answer 15

75% because of herd immunity (because we need 3/4 of infections to fail to get Ro=1)

Question 16

If Ro=4 but Reff=2 how many people need to be vaccinated?

Answer 16

Only 50% because only half the population can get the disease (Reff) so that makes R0 basically 2 meaning we need 50% of the people who can get infections to be immunized to get R0=1

Question 17

Latency Period

Answer 17

Time you have been infected but can not infect other people (this is super long time for HIV)

Question 18

When infection preceeds disease what happens?

Answer 18

You can infect other people but you don’t even know you are sick because you don’t have symptons yet(AIDS)

Question 19

SIR Model

Answer 19

a simple view of the world in terms of infectious disease:

Suseptibility (transmission) Infectious (recovery) Recovered

Question 20

What effects Transmission Rate?

Answer 20

dependent on how many infected people are around you

Question 21

B=

Answer 21

infectious contact rate

Question 22

Transmision Viurlence Tradeoff

Answer 22

Good pathogens are good at spreading disease so they don’t want to killl the host

Question 23

Vector

Answer 23

something that spreads a pathogen (like a mosquito)

Question 24

Why does mosquito control work?

Answer 24

Because it shortens the days that mosquitos are alive an infectious and also shortens the number of days that they are infectious

Question 25

Zoonotic Pathogens

Answer 25

Pathogens that come from animals

Question 26

How did we discover origin of HIV?

Answer 26

By looking at the place with the most amount of HIV strains (the place with most diversity)