Disease Detectives B/C

Test your knowledge of various Science Olympiad events.
UTF-8 U+6211 U+662F
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Re: Disease Detectives B/C

Postby UTF-8 U+6211 U+662F » April 14th, 2018, 2:05 pm

Also, leftovers should be reheated to
165 °F

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Re: Disease Detectives B/C

Postby UTF-8 U+6211 U+662F » April 22nd, 2018, 2:18 pm

Ground beef
160 degrees Fahrenheit

Poultry
165 degrees Fahrenheit


EDIT: Sorry for double post
EDIT2: All right, Froggie said I could go:

An epidemiologist distributes the following survey to both the ill and not ill attendees of a party:

1) Symptoms

2) Food eaten at party

Describe some of the possible things that could go wrong/are wrong with the survey.

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Re: Disease Detectives B/C

Postby wzhang5460 » April 22nd, 2018, 2:29 pm

Biases such as recall bias and response bias could result in skewed data.
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Re: Disease Detectives B/C

Postby UTF-8 U+6211 U+662F » April 22nd, 2018, 2:40 pm

Yep, your turn!

Also lack of things like name, contact info, age, and sex

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Re: Disease Detectives B/C

Postby wzhang5460 » April 22nd, 2018, 3:10 pm

How many foodborne pathogens are known by the CDC?
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Re: Disease Detectives B/C

Postby IcsTam » April 22nd, 2018, 3:14 pm

wzhang5460 wrote:How many foodborne pathogens are known by the CDC?


31
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Re: Disease Detectives B/C

Postby wzhang5460 » April 23rd, 2018, 6:33 pm

Yep!
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Re: Disease Detectives B/C

Postby IcsTam » April 24th, 2018, 1:07 pm

Name a bacterial agent which has an incubation period of 5 hours to 5 days that has historical significance in the field of epidemiology.
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Re: Disease Detectives B/C

Postby UTF-8 U+6211 U+662F » April 24th, 2018, 1:52 pm

IcsTam wrote:Name a bacterial agent which has an incubation period of 5 hours to 5 days that has historical significance in the field of epidemiology.

Answer
Vibrio cholerae

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Re: Disease Detectives B/C

Postby IcsTam » April 24th, 2018, 2:06 pm

UTF-8 U+6211 U+662F wrote:
IcsTam wrote:Name a bacterial agent which has an incubation period of 5 hours to 5 days that has historical significance in the field of epidemiology.

Answer
Vibrio cholerae


Yup!
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Re: Disease Detectives B/C

Postby UTF-8 U+6211 U+662F » April 24th, 2018, 2:21 pm

Explain the difference between retrospective cohort and case control studies. Can cohort studies be prospective? Can case control studies be prospective?

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Re: Disease Detectives B/C

Postby Killboe » April 25th, 2018, 6:57 am

UTF-8 U+6211 U+662F wrote:Explain the difference between retrospective cohort and case control studies. Can cohort studies be prospective? Can case control studies be prospective?




Cohort studies can be prospective
Case-control cannot be prospective. They can only be retrospective.
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Re: Disease Detectives B/C

Postby IcsTam » April 25th, 2018, 7:05 am

Killboe wrote:
UTF-8 U+6211 U+662F wrote:Explain the difference between retrospective cohort and case control studies. Can cohort studies be prospective? Can case control studies be prospective?




Cohort studies can be prospective
Case-control cannot be prospective. They can only be retrospective.


Also, the difference between them is that retrospective cohort is enrolled based on exposure while retrospective case-control is enrolled based on disease status (which obviously cannot be prospective because we wouldn't know disease status beforehand.)
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Re: Disease Detectives B/C

Postby UTF-8 U+6211 U+662F » April 25th, 2018, 1:00 pm

IcsTam wrote:
Killboe wrote:
UTF-8 U+6211 U+662F wrote:Explain the difference between retrospective cohort and case control studies. Can cohort studies be prospective? Can case control studies be prospective?




Cohort studies can be prospective
Case-control cannot be prospective. They can only be retrospective.


Also, the difference between them is that retrospective cohort is enrolled based on exposure while retrospective case-control is enrolled based on disease status (which obviously cannot be prospective because we wouldn't know disease status beforehand.)

Actually, case-control studies can be prospective.
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Re: Disease Detectives B/C

Postby IcsTam » April 25th, 2018, 8:25 pm

Given a 2x2 table, how would you calculate the standard deviation? (qualitative explanation, although if using numbers as an example would help you, then feel free to)
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