A cholera outbreak caused by drinking contaminated water from a fenced lakeshore water-collection site – Kasese District, western Uganda, June 2015
Gerald Pande1,&, Benon Kwesiga1, Godfrey Bwire2, Alex Riolexus Ario1
1Uganda Public Health Fellowship Program, Kampala, Uganda, 2Ministry of Health, Kampala, Uganda
Gerald Pande, Uganda Public Health Fellowship Program, Kampala, Uganda
on 20 June 2015, a cholera outbreak affecting >30 people was reported in a fishing village in Kasese District, western Uganda. We investigated this outbreak to identify the transmission mode and recommend control measures.
we defined a suspect case as a person with onset of acute watery diarrhea
from June 2015 onward; a probable case was a suspected case with positive
Rapid Diagnostic Test for cholera; a confirmed case was a suspect case with
cholerae cultured from stool. We conducted active case-finding in the village.
In a case-control study we compared exposure histories of 39 suspected cases
and 156 controls matched by age.We also conducted an environmental assessment.
we identified 61 suspect cases (attack rate = 5.1%, 61/1200), including 19 probable cases and 8 confirmed cases. The epidemic curve indicated an initial point-source outbreak followed by secondary transmission: after the primary case’s onset on 16 June, cases rapidly increased and peaked on 19 June, and rapidly declined afterwards; 8 scattered secondary cases occurred after 22 June. 95% (37/39) of cases and 67% (104/156) of controls usually collected water from water-collection Site A (ORM-H = 9.3; 95%CI = 2.1-39). The primary case developed cholera symptoms while fishing, came on ashore the night of 16 June, and defecated near Site A. The village’s tap-water system broke down 8 months ago, forcing villagers to collect water from the lake.
this cholera outbreak was caused by drinking lake water collected at Site
A, contaminated by the primary case-person’s faeces. At our recommendations,
the local authorities rigorously disinfected all case-persons’ faeces, provided
water treatment tablets, issued a water-boiling advisory, and three weeks
later fixed the dysfunctional tap-water system. No cases occurred after 1st July.
The 1st Uganda National Field Epidemiology Conference (Kampala)
The one-day Field Epidemiology Conference took place on December 11th, 2015 at Golf Course Hotel, Kampala. At this conference, Fellows presented investigations and epidemiologic studies they conducted since they joined the Fellowship in January 2015. Through these investigations and studies, important public health problems facing the nation were unveiled and strategies to address them proposed. This conference presented opportunity for national and international experts to discuss and propose solutions. This was the first Field Epidemiology Conference in Uganda and was attended by important dignitaries from the key partner institutions including Ministry of Health, UN agencies, Embassies, University officials, representatives from districts as well as other national and international delegates.
Dates: 11 Dec 2015
Venue: Golf Course Hotel, Kampala
Organizers: Ministry of Health and Makerere University School of Public Health
Contact person: Dr. Alex Riolexus Ario (firstname.lastname@example.org)