Spatial Pattern of Cholera Incidence in Ibadan City

Abstract

The recurrence of the cholera outbreak in Ibadan is alarming and very little has been documented on its spatial pattern. Hence, this study investigated the spatial pattern of cholera in Ibadan using GIS techniques and spatial statistics. Cholera is a disease that has been known to be associated with poor environmental sanitation. However, the impact of other contributory factors is also becoming evident. The study investigated the pattern of cholera incidence within the city for a period of three years. The process of geocoding was used to match addresses of cholera patients to the districts within Ibadan city. Anselin's Local Moran's I was used to assess statistically significant clusters within the city. The results depict clusters of cholera incidences located more within the core areas of the city characterized by high population density and poor sanitation. This study suggests improved environmental sanitation and provision of potable water supply to the core areas of the city.

La recurrence de l'epidemie de cholera a Ibadan est alarmante et tres peu a ete documentee sur sa repartition spatiale. Ainsi, cette etude a porte Sur la repartition spatiale de cholera a Ibadan en utilisant des techniques de SIG et statistiques spatiales. Le cholera est une maladie qui a ete connu pour etre associe a un mauvais   assa1mssement   de   l'envirom1ement.   Cependant, !'impact d'autres facteurs contributifs devient aussi evident. L'etude a porte sur le modele de l'incidence du cholera dans la ville pour une periode de trois ans. Le processus de geocodage a