Analysis of surveillance data of tuberculosis - Senegal from 2009 to 2018

  • Public health surveillance
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Background:
The burden placed on Tuberculosis makes it a public health problem in Senegal with an incidence of 81 cases per 100,000 inhabitants in 2018, a detection rate 64% below the target set for Millennium Development Goal 6. Multidrug-resistant tuberculosis is marked by a recrudescence of cases. Its prevalence is 0.9% among new cases. The objective of this study was to describe the trend of tuberculosis in Senegal from 2009 to 2018.
Methods:
We conducted a retrospective study of TB using surveillance data of the National Tuberculosis Control Program (NTP) registered from January 01, 2009 to December 31, 2018. All cases of pulmonary tuberculosis, extra-pulmonary, drug-resistant and non-drug-resistant TB were included. Aggregated TB data were extracted from an existing database and analyzed by person, place and time. Frequencies, proportions and confidence intervals were cal- culated using. Excel and Epi info 7.2.2.6
Results:
From 2009 to 2018 there were 128,836 tuberculosis cases of all forms, of which 68% (87,512) (95% CI = [67.67% - 68.18%] of new cases of pulmonary tuberculosis with positive microscopy (TPM + nc). The modal age group is [24-35 years] with 29.66% (29,521) (95% CI = [29.38% to 29.94%]. Men accounted for the majority of cases with 70% (61,310) (95% CI = [69.91% to 70.21%]). The Dakar region reported more cases with 44% (56,907) (95% CI = [43.93% - 44.44%]. From 2009 to 2018 the incidence per 100,000 population was 91, 87, 86, 93, 95, 95, 92, 86, 87 and 84 respectively. The 77% (99,451) (95% CI = [76.96% -77.42%] tested for HIV, of which 6.84% (6,807) (95% CI = [6.69% -7.00] coinfected TB/VIH. TPM + nc recorded from 2009 to 2018 87% (74,597) of therapeutic success and 3% (2,696) lethality. Of 2339 TBMDR-tested cases, 11% (261) were resistant including 9% co-infected with TB / HIV, 4% of children under 14, 9% of contacts and 64% of restatements.
Conclusion
In Senegal, the incidence of tuberculosis has slightly decreased. But an increase was observed in 2013 and 2014. We recommended increased surveillance for tuberculosis and a follow-up on tuberculosis to avoid drug resistance

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