Case MPH

CASE STUDY (#1) IN EPIDEMIOLOGY



On March 28, 2016 at around 6:00 PM, just after the graduation ceremony of
Bayabo Elementary School in the municipality of D.A., the P.T.A. members served merienda
cenna to 278 people composed of visitors, teachers and graduates composed of soft drink,
sandwich and fruit salad.

At 7 PM, 16 persons of varying ages who participated in that occasion were
brought to the municipal hospital of the town complaining of diarrheas, vomiting, abdominal
cramps and body weakness.

At 10 PM, another 20 persons of varying ages and complaints of symptoms as in
the above were again brought to the same hospital. They all attended the same occasion.

At 12 midnight, 28 persons from the same occasion again were brought to the same
hospital complaining of varying symptoms as above. However the two patients with severe
symptoms died after several minutes in the hospital.

At 2 AM, another batch of 30 persons from the same group were again brought to
same hospital but because they are already full, the hospital Physician referred them to the
hospital in the adjoining town. Three of them, with severe dehydration, low blood pressure
and severe body weakness, who unfortunately, died before reaching the hospital in the other
town.

The following morning, the Municipal Health Officer upon learning of the
incidence that happened in that graduation ceremony conducted investigation. Review of
records show the following data:

First 16 patients admitted at 7:00 PM the previous night

Name Age Sex MS Complaints Ate
Diarrhea Vomiting Abd. Weakness Salad
pain
1. A.A. 12 M Ch x X X x X
2. A.B. 12 F Ch x X X x X
3. A.C. 12 M Ch x X x X

, 4. A.D. 12 M Ch x x X
5. B.C. 13 F Ch x X X X
6. B.D. 13 M Ch x X x X
7. C.C. 13 F Ch x X x X
8. C.D. 13 F Ch x X x X
9. D.E. 35 M M x X X x X
10. D.F. 46 F M x X X x X
11. E.F. 15 F S x X X x X
12. E.G. 16 FI. S X X X x X
13. E.H. 17 F S X X X x X
14. F.I. 38 F M X X X x X
15. E.J. 29 F M X X X x X
16. E.K. 56 F M x X X x X
2nd group of 20 patients from same barangay admitted at 10PM
1. F.G. 25 M M X X X x X
2. F.H. 28 F M x X X x X
3. F.I. 46 M M x X X x X
4. F.J. 57 F M x X X x X
5. F.H. 66 M M x X X x X
6. G.I. 47 F M x X X x X
7. G.J. 59 M M x X X x X
8. G. K 65 F M x X X x X
9. G.L. 34 F M x X X x X
10. G.M. 71 M M x X X x X
11. G.I. 23 F M x X X x X
12. J.K. 22 M M x X X X
13. J.M. 40 M M x X X x X
14. J.N. 30 F M x X x X
15. M.L. 20 M M x x x X
16. M.M. 29 F M x X X
17. M.N. 27 F M x x X
18. M.O. 26 M M x x x X
19. M.P. 22 M M x x x X
20. M.R. 22 M M x x X
3rd batch of 28 patients from said occasion were admitted
at 12 midnight
1. N.A. 10 F Ch x x x x X
2. N.B. 12 F Ch x x x x X
3. N.C. 14 M Ch x x x x X
4. N.D. 11 F Ch x x x x X
5. N.E. 13 F Ch x x x x X
6. N.F. 12 F Ch x x x x X
7. N.G. 14 F Ch x x x x X
8. N.H. 10 M Ch x x x x X
9. F.G. 25 M M x x x x X
10. F.H. 28 F M x x x x X
11. F.I. 46 M M x x x x X
12. F.J. 57 F M x x x x X