Availability of safe drinking-water: the answer to cholera outbreak? Nabua, Camarines Sur, Philippines, 2012
Western Pacific Surveillance and Response
;
: 12-16, 2015.
Article
in English
| WPRIM
| ID: wpr-6782
ABSTRACT
Background:In May 2012, there were increasing diarrhoea cases and deaths reported from Nabua, Camarines Sur to the Philippines event-based surveillance system. An investigation was conducted to identify risk factors and determine transmission dynamics.Methods:A suspected case was defined as a resident of Nabua with at least three episodes of watery diarrhoea per day from 16 March to 22 June 2012. A confirmed case was defined as a suspected case positive for Vibrio cholerae. An environmental investigation was conducted and rectal swabs and water samples sent to the national reference laboratory for bacterial isolation. A 12 case-control study matching for age and sex was conducted. Data were analysed using Epi Info.Results:There were 309 suspected cases with two deaths, and the most affected age group was children under five years (45%). Eight cases were positive for Vibrio cholerae Ogawa El Tor and one for Non-01. Water samples were positive for faecal coliforms and Aeromonas caviae. The case-control study showed that cases had a higher odds than controls of using unchlorinated water sources (odds ratio [OR] = 3.6; 95% confidence interval [CI]1.6–8.5) and having toilets located within 20 m of a septic tank (OR = 2.7; 95% CI 1.4–5.3). In multivariate analysis, the only significant factor was drinking from piped water (OR = 0.21; 95% CI 0.09–0.49).Discussion:In this cholera outbreak, drinking-water from unchlorinated wells was a significant risk factor. Future cholera control efforts should include not just improving water and sanitation systems but also intensified behaviour change campaigns.
Full text:
Available
Index:
WPRIM (Western Pacific)
Type of study:
Observational study
/
Prognostic study
/
Risk factors
Language:
English
Journal:
Western Pacific Surveillance and Response
Year:
2015
Type:
Article
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