Disease Detectives B/C

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Tailsfan101
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Disease Detectives B/C

Post by Tailsfan101 » September 8th, 2020, 9:13 am

Just going to start this with the same question I asked nearly a year ago:

A hypothetical outbreak of cholera occurs in Sciolyville, NC. Some attendees of a picnic on an afternoon on May 17, 2020 were reported experiencing symptoms of diarrhea, vomiting, and dehydration. It was later reported that water served at the picnic had come from a nearby river. The following data was collected on six potential cases that attended the picnic:

Initials---Onset----Diagnosis----Diarrhea? --Vomiting?--Dehydration?--Lab testing
ES-----May 18----cholera--------yes-----------no--------------yes----------pending
BR-----May 17-----none------------no----------no--------------yes-----------positive
PK-----May 18-----cholera--------no-----------yes-------------yes-----------not done
GH-----May 19----cholera--------yes-----------no--------------no------------negative
LF------May 18----cholera--------yes----------yes-------------yes-----------pending
ZY------May 17-----none----------yes-----------no-------------yes-----------positive

Write a case definition for this outbreak, then list all six potential cases as either confirmed, probable, or possible.
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Re: Disease Detectives B/C

Post by k1208438 » September 24th, 2020, 6:51 pm

Clinical description, Infection caused by Vibrio Cholerae, causes Nausea, and Diarrhea.
Laboratory criteria for diagnosis:Isolation of toxigenic (i.e., cholera toxin-producing) Vibrio cholerae O1 or O139 from stool or vomit.
Case classification:a clinically compatible case that is laboratory confirmed.

ES - Probable
BR - Possible
PK - Probable
GH - Possible
LF - Confirmed
ZY - Probable

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Re: Disease Detectives B/C

Post by Tailsfan101 » September 24th, 2020, 6:59 pm

k1208438 wrote:
September 24th, 2020, 6:51 pm
Clinical description, Infection caused by Vibrio Cholerae, causes Nausea, and Diarrhea.
Laboratory criteria for diagnosis:Isolation of toxigenic (i.e., cholera toxin-producing) Vibrio cholerae O1 or O139 from stool or vomit.
Case classification:a clinically compatible case that is laboratory confirmed.

ES - Probable
BR - Possible
PK - Probable
GH - Possible
LF - Confirmed
ZY - Probable
The case definition is good, but be sure to include Place and Time. As for the cases, BR and ZY are confirmed (positive lab testing), and LF is probable (no lab evidence). The rest are correct. Your turn!
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Re: Disease Detectives B/C

Post by k1208438 » September 24th, 2020, 7:42 pm

Aight,
1,Is Ascariasis a Infestation or Colonization?
2,What does Arenavirus cause?
3,Name the three forms of plague.
That's all!

EDIT: if no one answers this im going to answer it myself
Last edited by k1208438 on September 27th, 2020, 7:24 pm, edited 1 time in total.

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Re: Disease Detectives B/C

Post by Reckless57 » October 2nd, 2020, 9:05 am

k1208438 wrote:
September 24th, 2020, 7:42 pm
Aight,
1,Is Ascariasis a Infestation or Colonization?
2,What does Arenavirus cause?
3,Name the three forms of plague.
That's all!

EDIT: if no one answers this im going to answer it myself
1. Infestation
2. Lassa Fever
3. Bubonic, Septicemic, Pneumonic
2021 Events: TBD

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DD: 1st States :)
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Re: Disease Detectives B/C

Post by k1208438 » October 2nd, 2020, 9:11 am

Reckless57 wrote:
October 2nd, 2020, 9:05 am
k1208438 wrote:
September 24th, 2020, 7:42 pm
Aight,
1,Is Ascariasis a Infestation or Colonization?
2,What does Arenavirus cause?
3,Name the three forms of plague.
That's all!

EDIT: if no one answers this im going to answer it myself
1. Infestation
2. Lassa Fever
3. Bubonic, Septicemic, Pneumonic
correct! finally !!!

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Re: Disease Detectives B/C

Post by Reckless57 » October 4th, 2020, 11:23 am

1.What is an infection in the intestine called?
3. Which case-definition category (confirmed, probable, possible, not a case) has the highest sensitivity and which category has the highest specificity?
3. For a sample size of 22, would a T-test or Z-test be more appropriate?
2.Is a Cross-Sectional study analytical or descriptive?
2021 Events: TBD

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WIDI: 3rd Regionals
DD: 1st States :)
EXP Design: 2nd States

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Re: Disease Detectives B/C

Post by UTF-8 U+6211 U+662F » October 17th, 2020, 10:23 am

Reckless57 wrote:
October 4th, 2020, 11:23 am
1.What is an infection in the intestine called?
3. Which case-definition category (confirmed, probable, possible, not a case) has the highest sensitivity and which category has the highest specificity?
3. For a sample size of 22, would a T-test or Z-test be more appropriate?
2.Is a Cross-Sectional study analytical or descriptive?
1. Gastroenteritis?
2. Confirmed highest specificity, possible highest sensitivity
3. This would depend on the data you're collecting. For proportions or normally distributed data, a Z-test would probably be fine, but in cases where a sample size of 22 may be too low to justify assuming a normal distribution, a T-test might be more apt.
4. Descriptive.
Last edited by UTF-8 U+6211 U+662F on October 17th, 2020, 10:25 am, edited 1 time in total.

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Re: Disease Detectives B/C

Post by Reckless57 » October 17th, 2020, 12:44 pm

UTF-8 U+6211 U+662F wrote:
October 17th, 2020, 10:23 am
Reckless57 wrote:
October 4th, 2020, 11:23 am
1.What is an infection in the intestine called?
3. Which case-definition category (confirmed, probable, possible, not a case) has the highest sensitivity and which category has the highest specificity?
3. For a sample size of 22, would a T-test or Z-test be more appropriate?
2.Is a Cross-Sectional study analytical or descriptive?
1. Gastroenteritis?
2. Confirmed highest specificity, possible highest sensitivity
3. This would depend on the data you're collecting. For proportions or normally distributed data, a Z-test would probably be fine, but in cases where a sample size of 22 may be too low to justify assuming a normal distribution, a T-test might be more apt.
4. Descriptive.
All correct except #4. Cross sectional studies can be either analytical or descriptive, or both.
2021 Events: TBD

2020 Events:
Protein Modeling: 1st National Ready regionals
WQ: 3rd National Ready regionals

2019 Events: (Div B)
Boom: 4th Regionals
Heredity: 3rd States
WIDI: 3rd Regionals
DD: 1st States :)
EXP Design: 2nd States

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Re: Disease Detectives B/C

Post by UTF-8 U+6211 U+662F » October 17th, 2020, 1:37 pm

At a party of 100 people, 20 people later became ill. 15 of the 100 people ate the pork, 8 of which matched the case definition for the illness. What is the odds ratio for the pork? Interpret your result.

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