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Cholera; a Public Health concern
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Transcript of Cholera; a Public Health concern
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Cholera; a Public Health concern
Acute Watery Diarrhea (AWD) caused by Vibrio Cholera, may have high CFR
Waterborne disease Contributing factors
Limited access to safe drinking water Poor sanitation system
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Diarrheal disease concerns in Pakistan- 2010
Weak Public Health infrastructure Over 100 million lack safe water supply Around 50 million lack proper sanitation
Leading cause of morbidity in children < 5 year Lab confirmed Cholera cases; 164
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The Setting: Muzaffargarh District-Aug-2010
130,000 houses damaged 70% population affected
Shelter camps for displaced25% water samples contaminated Disease Early Warning System established
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The Outbreak
7th August 2010, three AWD cases reported Cases from an IDP camp Outbreak investigating team departed on
8th August 2010 Pediatrician Epidemiologist (FELTP- Fellow) WHO Surveillance officer Local supporting staff
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Objectives
Control the outbreak
Identify and assess associated risk factors Make recommendations to prevent future
outbreaks
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Methodology
Investigation between Aug 8-18, 2010 Health facility data review & active case finding Laboratory and environmental samples Case-control study Structured questionnaire Controls from the same area (1:2)
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Case Definition
“ Persons aged five years or above resident of IDP camp Tehsil Ali Pur with two or more watery stools in 24 hours, from August 4 to 18th 2010 ”
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Results
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Case Characteristics (N=18)
Median age (range) 9 year (5-50)
Male: Female 1:1.5
Severe Dehydration 6 (33%)
Case Fatality Rate (CFR) 1 (5.5%)
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Age Distribution of Cases(N=18)
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Spot Map of IDP camp
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Risk Factors’ Association
Attributes Cases Controls Odds 95% CI (18) (36) Ratio
Bread 11 14 10.18 2.08-56.67
Rice 10 21 0.95 0.29-3.1
Milk 4 14 0.45 0.10-1.6
Tap water 6 20 0.4 0.12-1.3
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Risk Factors’ Association
Bread consumption showed significant association with the disease (OR 10.18; 95% CI 2.08-56.67; p < 0.05)
Poor hand washing practices among bread handlers showed independent statistical association with the disease (OR 31.5; 95% CI 1.7-1364; p < 0.05)
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Epi Curve
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Laboratory results & Environmental aspects
3 stool samples positive for Vibrio cholerae O1, biotype ElTor, serotype Ogawa
Drinking water samples found satisfactory for human consumption
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Study Limitations
IDP’s high turn over rate may be a cause of underestimation of cases
Poor resources and area under water limited study scope to IDP camp
Potential information bias could not be ruled out
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Recommendations
Education sessions for safe food handling and hand washing practice
Distribution of ORS and Aquatabs Referral of severely dehydrated cases Diarrhea treatment center establishment at the
health facility
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Study Impact
Provincial health department Punjab and WHO established a Diarrhea Treatment Center (DTC) at this health facility
Hygiene-care education campaigns started Drinking water checked periodically
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THANKS
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Acknowledgments
District and Provincial WHO staff
Local and District Health Department
National Institute of Health (NIH) Islamabad
Medical Superintendent, THQ Hospital Ali Pur
Executive District Officer Health, Muzafar Garh
Dr. Mirza Amir Baig
Dr. Jamil Ansari
Dr. Tamkeen
Dr. Rana Safdar
Dr. Salman Ahmad
Dr. Rana Jawad Asghar
Dr. Bargees Mazhar Kazi
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Laboratory Test
Stool samples in wide mouth screw cap bottle
Samples transported in Cary-Blair transport medium to laboratory
Stool samples analyzed for salmonella, Shigella and Vibrio cholera
Samples processed through conventional culture methods
Antimicrobial susceptibility checked through disc diffusion method