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Volume 26, Number 9—September 2020
Dispatch

Assessing 3 Outbreak Detection Algorithms in an Electronic Syndromic Surveillance System in a Resource-Limited Setting

Emily Alsentzer1, Sarah-Blythe Ballard1Comments to Author , Joan Neyra, Delphis M. Vera, Victor B. Osorio, Jose Quispe, David L. Blazes, and Luis Loayza
Author affiliations: Massachusetts Institute of Technology, Cambridge, Massachusetts, USA (E. Alsentzer); Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA (E. Alsentzer, S.B. Ballard, D.L. Blazes); Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA (S.-B. Ballard); Naval Medical Research Unit No. 6, Callao, Peru (S.B. Ballard, D.M. Vera, V.B. Osorio, J. Quispe); Marina de Guerra del Perú, Callao (L. Loayza)

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Figure 2

Epidemic curves for nonbloody acute diarrheal disease over time, demonstrating outbreaks identified by the Alerta and Vigila Systems, by identifying algorithm and surveillance site, Peru, 2009-2011. A) Buque de la Armada Peruana Aguirre; B) BAP Velarde; C) Comandancia Tercera Zona Naval; D) Estación Naval Submarinos; and E) Policlínico Naval Ancón. Shapes correspond with identifying algorithms; asterisks indicate outbreaks confirmed through epidemiologic links (i.e., true positives). CUSUM, C3 c

Figure 2. Epidemic curves for nonbloody acute diarrheal disease over time, demonstrating outbreaks identified by the Alerta and Vigila Systems, by identifying algorithm and surveillance site, Peru, 2009-2011. A) Buque de la Armada Peruana Aguirre; B) BAP Velarde; C) Comandancia Tercera Zona Naval; D) Estación Naval Submarinos; and E) Policlínico Naval Ancón. Shapes correspond with identifying algorithms; asterisks indicate outbreaks confirmed through epidemiologic links (i.e., true positives). CUSUM, C3 cumulative sums; EWMA, exponentially weighted moving average.

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1These first authors were co–principal investigators and contributed equally to this article.

Page created: July 14, 2020
Page updated: August 19, 2020
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