Zika in Colombia
Colombia had the Americas' second-largest Zika outbreak in 2015–2016, with over 100,000 cases — and played a central role in research linking Zika to Guillain-Barré syndrome.
Key Data
| Metric | Data |
| Total cases (2015–2016) | >100,000 |
| Americas ranking | 2nd largest Zika caseload in Americas |
| Pregnant women infected | ~11,000 (registry enrolled) |
| Guillain-Barré cases | Significant surge concurrent with Zika |
| Epidemic subsided | 2017 (population immunity) |
| Health authority | Instituto Nacional de Salud (INS), Colombia |
Colombia's Role in Zika Research
Colombia's INS (Instituto Nacional de Salud) established a landmark prospective registry of Zika-exposed pregnancies — the PRESTO (Pregnancy Registry for Exposure to Zika in Colombia) cohort — enrolling approximately 11,000 pregnant women with Zika infection. This registry generated crucial data on congenital Zika syndrome rates, the gestational timing of greatest risk, and developmental outcomes at 1 and 2 years. Colombia's data contributed significantly to understanding that congenital Zika syndrome is broader than just microcephaly — children exposed to Zika in utero can have normal head circumference at birth but develop neurodevelopmental problems in early childhood.
Colombia also documented a significant surge in Guillain-Barré syndrome (GBS) cases during the 2015-2016 Zika epidemic — about 3-4 times the expected rate — providing prospective evidence for the Zika-GBS association.
Zika and Altitude: Colombia's Risk Gradient
Like dengue, Zika risk in Colombia varies dramatically by altitude. Bogotá (2,640m) is essentially Zika-free due to the same altitude-related Aedes limitations that reduce dengue. Medellín, Cali, and coastal regions carry risk. This altitude-gradient means that pregnant women visiting Colombia face dramatically different risks depending on which cities they visit — highland tourist destinations are safer than coastal or inter-Andean valley destinations.
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FAQ
The acute Zika epidemic in Colombia has subsided, but Aedes aegypti remains present in low-altitude regions and sporadic Zika transmission continues. Pregnant women should consult their healthcare provider before traveling to Colombia. If travel is necessary, DEET repellent, protective clothing, and staying in screened or air-conditioned accommodation reduce risk. High-altitude Bogotá has negligible Zika risk; coastal and lower-altitude regions retain some risk.
Colombia's congenital Zika syndrome (CZS) case count was lower than Brazil's, partly because Colombia detected its outbreak later (after Brazil had already established the microcephaly link, prompting protective measures for pregnant women). Colombia's PRESTO registry followed over 11,000 Zika-exposed pregnancies and found CZS rates were significant but variable by trimester of infection. First trimester infection carried the highest risk of severe neurological defects.
Sources: Colombia INS Zika surveillance data; NEJM (Galang et al. Colombia Zika registry); Lancet (Calle et al. GBS Colombia Zika); PAHO Colombia Zika situation reports.
Related: Zika overview · Brazil Zika · USA Zika