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Dengue reemergence in Argentina
G Avilés1, G Rangeón, V Vorndam
1Instituto Nacional de Enfermedades Virales Humanas Dr. J.I. Maiztegui, Administración Nacional de Laboratorios e Institutos de Salud Dr. C. Malbrán, Pergamino, Argentina.
Emerging Infectious Diseases
|August 25, 1999
Summary
The Aedes aegypti mosquito, previously eradicated, has returned to Argentina, causing the first dengue cases since 1916. This resurgence marks a significant southern expansion of dengue virus transmission in South America.
Area of Science:
- Medical Entomology
- Infectious Diseases
- Public Health
Background:
- Aedes aegypti, the primary vector for dengue virus, was eradicated from Argentina in 1963.
- Dengue virus transmission was last recorded in Argentina in 1916.
Purpose of the Study:
- To report the reinfestation of Argentina by Aedes aegypti.
- To document the emergence of indigenous dengue virus transmission in Argentina.
Main Methods:
- Surveillance for Aedes aegypti mosquito populations.
- Monitoring of dengue virus cases in humans, including travel history analysis.
Main Results:
- Aedes aegypti has reinfested Argentina, reaching as far south as Buenos Aires.
- Nineteen cases of indigenous dengue transmission were detected in Salta Province in 1997.
- Four imported dengue cases were identified in individuals with recent travel to Brazil, Ecuador, or Venezuela.
Conclusions:
- The re-establishment of Aedes aegypti in Argentina poses a significant public health threat.
- The detected dengue cases represent a new southern extension of dengue virus epidemiology.
- Enhanced surveillance and control measures are crucial to manage the risk of dengue outbreaks.