| cholera epidemic associated with consumption of unsafe drinking water and street-vended water--eastern freetown, sierra leone, 2012. | during 2012, sierra leone experienced a cholera epidemic with 22,815 reported cases and 296 deaths. we conducted a matched case-control study to assess risk factors, enrolling 49 cases and 98 controls. stool specimens were analyzed by culture, polymerase chain reaction (pcr), and pulsed-field gel electrophoresis (pfge). conditional logistic regression found that consuming unsafe water (matched odds ratio [mor]: 3.4; 95% confidence interval [ci]: 1.1, 11.0), street-vended water (mor: 9.4; 95% ci: ... | 2014 | 24470563 |