Results: There were 132 months of observations and 1039 cholera cases reported during this
time. The total number of Vibrio cholerae O1 and O139 reported was 940 and 99 cases,
respectively. The number of cases reported gradually declined after 2004. The overall mean
(sd) of monthly cholera counts was 7.9 (8.2). Results suggested that there was a near
significant reduction of 50% from 2000–2004 to 2005–2010 with mean (sd) were 11.2(8.0)
and 5.1(7.4) respectively. The average peak time during the first time period was August,
while July was during the second time period. During 2000–2004, there was a positive
significant association between Rainfall and V. cholerae cases (r = 0.51, p < 0.001) and this
was not observed in the second time period.
Conclusion: The trend of V.cholerae was decreasing from 2000 to 2010 and there was a
significant association between Rainfall and cholera cases between 2000 and 2004.