The epidemiology and transmissibility of Zika virus in Girardot and San Andres Island, Colombia, September 2015 to January 2016

Rojas, Diana Patricia, Dean, Natalie E., Yang, Yang, Kenah, Eben, Quintero, Juliana, Tomasi, Simon, Ramirez, Erika Lorena, Kelly, Yendi, Castro, Carolina, Carrasquilla, Gabriel, Halloran, M. Elizabeth, and Longini, Ira M. (2016) The epidemiology and transmissibility of Zika virus in Girardot and San Andres Island, Colombia, September 2015 to January 2016. Eurosurveillance, 21 (28). 30283.

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Abstract

Transmission of Zika virus (ZIKV) was first detected in Colombia in September 2015. As of April 2016, Colombia had reported over 65,000 cases of Zika virus disease (ZVD). We analysed daily surveillance data of ZVD cases reported to the health authorities of San Andres and Girardot, Colombia, between September 2015 and January 2016. ZVD was laboratory-confirmed by reverse transcription-polymerase chain reaction (RT-PCR) in the serum of acute cases within five days of symptom onset. We use daily incidence data to estimate the basic reproductive number (R0) in each population. We identified 928 and 1,936 reported ZVD cases from San Andres and Girardot, respectively. The overall attack rate for reported ZVD was 12.13 cases per 1,000 residents of San Andres and 18.43 cases per 1,000 residents of Girardot. Attack rates were significantly higher in females in both municipalities (p < 0.001). Cases occurred in all age groups with highest rates in 20 to 49 year-olds. The estimated R0 for the Zika outbreak was 1.41 (95% confidence interval (CI): 1.15-1.74) in San Andres and 4.61 (95% CI: 4.11-5.16) in Girardot. Transmission of ZIKV is ongoing in the Americas. The estimated R0 from Colombia supports the observed rapid spread.

Item ID: 60731
Item Type: Article (Research - C1)
ISSN: 1560-7917
Keywords: Zika virus, modeling, epidemiology, Colombia, outbreaks
Copyright Information: This article is copyright of the authors, 2016. This is an open-access article distributed under the terms of the Creative Commons Attribution (CC BY 4.0) Licence. You may share and adapt the material, but must give appropriate credit to the source, provide a link to the licence, and indicate if changes were made.
Funders: National Institute of Health (NIH), Colombian Department of Science and Technology (CDST)
Projects and Grants: NIH U54GM111274, NIH R37 AI032042, CDST Fulbright - Colciencias scholarship
Date Deposited: 29 Oct 2019 01:37
FoR Codes: 42 HEALTH SCIENCES > 4202 Epidemiology > 420202 Disease surveillance @ 50%
32 BIOMEDICAL AND CLINICAL SCIENCES > 3202 Clinical sciences > 320211 Infectious diseases @ 25%
49 MATHEMATICAL SCIENCES > 4905 Statistics > 490502 Biostatistics @ 25%
SEO Codes: 92 HEALTH > 9204 Public Health (excl. Specific Population Health) > 920404 Disease Distribution and Transmission (incl. Surveillance and Response) @ 100%
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