Ebola Virus Disease Surveillance System Evaluation, Boke region, Guinea, 2019

  • Public health surveillance
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Background:
In 2014, following the West Africa’s Ebola Virus Disease (EVD) outbreak, WHO declared EVD as a Public Health Emergency of International Concern. Guinea has established a surveillance system to detect early and respond promptly all cases of EVD. The purpose of this evaluation is to determine whether the system is meeting its objectives to make recommendations to improve the system
Methods:
CDC guideline 2001 was used to evaluate the system. A structured questionnaire was administered to surveillance officers to health districts of Boké region and heads facilities selected according to their commitment in EVD surveil- lance. The EVD surveillance database was reviewed between 2014 and 2018. Simplicity, acceptability, timeliness, data quality, flexibility, positive predictive value (PPV), and utility were assessed based on respondent responses and revision of surveillance tools
Results:
Simplicity: 85% of the interviewees had a case definition, 70% found it easy to use, although investigation case form was easy to fill out, all respondents said that data entry into two databases took a lot of time. Acceptability: 100% of respondent were willing to do surveillance of EVD. Between 2014 and 2016, the timeliness: 100% of cases were detected within 24 hours after symptoms onset and reported to national level promptly, however, data quality was 62%. Flexibility: case definitions were changed three times during the epidemic and used easily except post- epidemic period by underreporting of five cases detected by active research during evaluation. The PPV was 3%. Useful: system detected seven EVD outbreak were responded promptly
Conclusion
EVD surveillance system is meeting his objective. It’s useful, simple but complex for data entry, acceptable, flexible, and prompt with low data quality and low PPV during outbreak period. However, EVD system is little flexible post outbreak. Heads of facilities were sensitized on case definition. Efforts should be done to use one database to enter data integrating EVD surveillance into the Integrated Disease Surveillance and Response (IDSR), improve data quality and follow head of facilities on case definition post ebola outbreak.

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