Disease Detectives B/C

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hmath729
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Disease Detectives B/C

Postby hmath729 » August 21st, 2014, 5:38 pm

Welcome to Disease Detectives B/C 2015! I'll start the questions...
What is the difference between cohort and case-control studies?
Last edited by hmath729 on December 17th, 2014, 4:02 pm, edited 1 time in total.
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Re: Disease Detectives B

Postby bernard » August 22nd, 2014, 6:57 pm

answer
For a case-control study, participants are selected on a basis of [i]whether or not they have the disease[/i]; then, they are compared for common exposures to determine if an association exists. For a cohort study, participants are selected on a basis of [i]exposure or no exposure[/i]; then, disease occurrence is compared to determine if an association exists. Choosing a study type depends on what you already know. If there are 3 students who at school lunch last week and 100 cases of salmonella are reported, a case-control would be best because for those 100 cases, you can determine exposure to school lunch (Y/N) and look for an association.
Give two examples of each: 1) vectors, 2) fomites, 3) zoonotic diseases.
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Re: Disease Detectives B

Postby hmath729 » August 27th, 2014, 11:23 am

Yep, your turn!
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Re: Disease Detectives B

Postby bernard » August 27th, 2014, 11:25 am

Give two examples of each: 1) vectors, 2) fomites, 3) zoonotic diseases.
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Re: Disease Detectives B

Postby hmath729 » August 28th, 2014, 9:47 am

Vectors
ticks, mosquitoes
Fomites
Comb, headphones
Zoonotic Diseases
Lyme disease, salmonellosis
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Re: Disease Detectives B

Postby bernard » August 28th, 2014, 10:03 am

Correct, your turn!
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Re: Disease Detectives B

Postby hmath729 » August 29th, 2014, 4:15 pm

(I can't think of anything else right now...)
Bob shared his headphones with Joe. Bob then used them again. The next day, Bob was diagnosed with head lice. The headphones are an example of...
:)
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Re: Disease Detectives B

Postby bernard » August 29th, 2014, 5:17 pm

Answer
A fomite!
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Re: Disease Detectives B

Postby hmath729 » September 20th, 2014, 5:27 pm

Correct, your turn.
Sorry it took me so long to reply, I was inactive.
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Re: Disease Detectives B

Postby bernard » October 20th, 2014, 8:55 am

Define risk difference. Risk difference is the difference in rates of occurrence between exposed and unexposed groups in the population.
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Re: Disease Detectives B

Postby Eggo » November 11th, 2014, 9:49 am

The change in risk of a given activity or treatment in relation to a control activity or treatment.
Although I just cut and pasted this, I really learned a lot by reading about this. Thanks Bernard!
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Re: Disease Detectives B

Postby bernard » November 11th, 2014, 10:13 am

The change in risk of a given activity or treatment in relation to a control activity or treatment.
Although I just cut and pasted this, I really learned a lot by reading about this. Thanks Bernard!
Correct! Another way to define it is: risk difference is the difference in rates of occurrence between exposed and unexposed groups in the population.
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Re: Disease Detectives B

Postby Eggo » November 14th, 2014, 11:22 am

Okay, what is herd immunity?
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Re: Disease Detectives B

Postby mkb14954 » November 14th, 2014, 11:39 am

Herd immunity is a form of immunity in which the majority of the population is immunized so that those who have not developed immunity can stay protected.

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Re: Disease Detectives B

Postby Eggo » November 16th, 2014, 8:24 am

Correct! Your turn!
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