84. Which of the following may be an appropriate case definition based on the provided scenario? A. Illness among persons who consumed drinks at Bar XYZ within 9:00 pm of December 11, 2021 to 3:00 am of December 12, 2021. B. Illness characterized by chills, cramps, diarrhea, fever, headache, myalgia, nausea, and vomiting among persons who consumed drinks at Bar XYZ on December 11, 2021. C. Illness characterized by nausea, vomiting, cramps and diarrhea among persons who consumed drinks at Bar XYZ within 9:00 pm of December 11, 2021 to 3:00 am of December 12, 2021. D. Illness characterized by nausea, vomiting, cramps and diarrhea among persons who consumed root beer at Bar XYZ within 9:00 pm of December 11, 2021 to 3:00 am of December 12, 2021. 85. Which of the following etiologic agents is consistent with information in the provided scenario? A. Cadmium; range of incubation period is 1 to 60 mins; symptoms include nausea, vomiting, cramps, and diarrhea B. Enterotoxin of Vibrio cholerae; range of incubation period is 24 to 72 h; symptoms include diarrhea and vomiting C. Rotavirus; range of incubation period is 16 to 48 h; symptoms include nausea, vomiting, cramps, and diarrhea D. Toxin of Staphylococcus aureus; range of incubation period is 2 to 4 h; symptoms include nausea, cramps, and vomiting

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84. Which of the following may be an appropriate case definition based on the provided scenario?
A. Illness among persons who consumed drinks at Bar XYZ within 9:00 pm of December 11, 2021 to 3:00
am of December 12, 2021.
B. Illness characterized by chills, cramps, diarrhea, fever, headache, myalgia, nausea, and vomiting
among persons who consumed drinks at Bar XYZ on December 11, 2021.
C. Illness characterized by nausea, vomiting, cramps and diarrhea among persons who consumed drinks
at Bar XYZ within 9:00 pm of December 11, 2021 to 3:00 am of December 12, 2021.
D. Illness characterized by nausea, vomiting, cramps and diarrhea among persons who consumed root
beer at Bar XYZ within 9:00 pm of December 11, 2021 to 3:00 am of December 12, 2021.
85. Which of the following etiologic agents is consistent with information in the provided scenario?
A. Cadmium; range of incubation period is 1
to 60 mins; symptoms include nausea,
vomiting, cramps, and diarrhea
B. Enterotoxin of Vibrio cholerae; range of
incubation period is 24 to 72 h; symptoms
include diarrhea and vomiting

C. Rotavirus; range of incubation period is 16
to 48 h; symptoms include nausea,
vomiting, cramps, and diarrhea
D. Toxin of Staphylococcus aureus; range of
incubation period is 2 to 4 h; symptoms
include nausea, cramps, and vomiting

Given: Twenty-five individuals complained of acute gastrointestinal diseases symptoms after a night out at a
popular bar, BAR XYZ, along Legarda Road in Baguio City on December 11, 2021. The bar opened for business
at around 9:00 pm and closed at 3:00 am of the next day. The following tables and figure provide some of the
information obtained during routine outbreak investigation procedures.
Table 1. Reported symptoms of cases in the illness outbreak at Bar XYZ
NUMBER
NUMBER OF CASES
SYMPTOM
REPORTING
SYMPTΟM
RESPONDING TO
QUESTION
PERCENTAGE
Bloody diarrhea
Chills
0.00
0.00
21
25
Cramps
25
25
100.00
Diarrhea
24
25
96.00
Fever
25
0.00
Headache
25
0.00
Myalgia
21
0.00
96.00
100.00
Nausea
24
25
Vomiting
25
25
O to 56 to 10 11 to 16 to 21 to 26 to 31 to 36 to 41 to 46 to 51 to 56 to
30 35
15
20 25
40
45
50
55
60
Minutes
Figure 1. Epidemic curve for the illness outbreak at Bar XYZ
Table 2. Drinks consumed at Bar XYZ by bar goers during time of outbreak
DRINKS
DID NOT DRINK
DRANK
ILL - DRANK
ILL - DID NOT DRINK
Whiskey sour
Spritz
Root beer
41
21
31
16
8
29
9
14
52
10
23
2
Negroni
47
11
19
1
Moscow mule
21
28
8
11
Mojito
Martini
34
26
12
12
17
41
16
6
Margarita
Manhattan
17
42
15
27
22
12
Cosmopolitan
35
27
19
Number of cases

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