Evaluation of the measles surveillance system of the Ga West Municipality, Ghana, 2017

Abstract

Introduction: Over 140,000 people globally died from measles in 2018; most of which occurred in developing countries. In Ghana, measles is one of the diseases earmarked for elimination in the Integrated Disease Surveillance and Response (IDSR) strategy. The measles surveillance system seeks to monitor trends, detect outbreaks and report in a timely manner. In order to improve upon the performance of the Ga West Municipal Measles surveillance system, it was evaluated with the aim of determining its effectiveness. Methods: We used CDC updated guidelines for surveillance system evaluation to assess system attributes. Measles surveillance data from 2012 – 2016 were abstracted from the DHIMS. Case investigation forms, weekly and monthly IDSR reporting forms were reviewed to validate abstracted data. Key surveillance officers were interviewed on system operations. Data was analyzed descriptively to generate frequencies and relative frequencies. Results: The system operated with a reasonable number of disease variables and case definition was simple to apply. The system was found to be integrated with the national IDSR. Government facilities across all seven sub-districts, owned and contributed data to the system. Of the 48 suspected case-patients, 39 (81.0%) were investigated; none of which was positive giving a Predictive value positive (PVP) of 0%. Majority of facilities (though privately owned) did not contribute data to the system. All tested samples were received at the laboratory within the stipulated three (3) days. The system was stable with available case base forms. Over 56% (22/39) of the samples tested had no vaccination records. Data is used to guide routine and supplementary immunization activities. Conclusion: Ga west Municipal measles surveillance system is simple, flexible and generally acceptable. It is sensitive, timely, stable but with low representativeness. It is therefore effective. Municipal health officials have been sensitized on private sector participation and need for quality and timely data.