Mem Inst Oswaldo Cruz, Rio de Janeiro, VOLUME 121 | 2026
Research Articles

Aedes vittatus in Haiti: continued expansion across the Caribbean and implications for the Americas

Daphenide St-Louis1,2, Philippe Boussès1, Loîc Talignani1, Chrystelle Lasica1, Evens Emmanuel2, Frédéric Simard1, David Roiz1,3,+

1Université de Montpellier, Centre National de la Recherche Scientifique, Institut de Recherche pour le Développement, Maladies infectieuses et vecteurs: écologie, génétique, évolution et contrôle, Montpellier, France
2Quisqueya University, Climate Change Research Team, Port-au-Prince, Haiti
3Consejo Superior de Investigaciones Científicas-Universidad de Castilla-La Mancha-Junta de Comunidades de Castilla-La Mancha, Instituto de Investigación en Recursos Cinegéticos, Sanidad y Biotecnología, Ciudad Real, Spain

DOI: 10.1590/0074-02760260238
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ABSTRACT

BACKGROUND Aedes vittatus, an emerging invasive species and arboviral vector with high ecological plasticity and dispersal capacity, is expanding in the Caribbean, being detected in the Dominican Republic, Cuba, and Jamaica and recently in Yucatán, Mexico.
OBJECTIVES This study aimed to provide evidence of the establishment of Ae. vittatus in Haiti.
METHODS Larval surveys were conducted in 18 localities within 12 municipalities in the North and Northeast departments of Haiti. Specimens were identified morphologically and confirmed by COI-based DNA barcoding.
FINDINGS We report, for the first time, the detection of the invasive vector Ae. (Fredwardsius) vittatus in Haiti, confirmed morphologically and molecularly, with the species detected in half of the municipalities sampled. Phylogenetic analyses placed Haitian specimens within a Caribbean/American group, closely related to sequences from Mexico. Additional mosquito species were identified, including first records of Culex garciai and Culex interrogator in Haiti.
MAIN CONCLUSIONS Given its potential role as a vector of chikungunya, dengue, Zika and yellow fever, continued entomological surveillance and early detection in the Caribbean and the Americas are needed.

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Financial support: This study was supported through the Anténor-Firmin doctoral grant, the French Embassy in Haiti, the Banque de la République d’Haïti, and the ARTS grant from the Institut de Recherche pour le Développement (IRD).
+ Corresponding author: david.roiz@ird.fr | ORCID https://orcid.org/0000-0002-5819-3648
Received 17 June 2026
Accepted 21 August 2026

HOW TO CITE
St-Louis D, Boussès P, Talignani L, Lasica C, Emmanuel E, Simard F, et al. Aedes vittatus in Haiti: continued expansion across the Caribbean and implications for the Americas. Mem Inst Oswaldo Cruz. 2026; 121: e260238.
Handling editor: Ricardo Lourenço-de-Oliveira | ORCID https://orcid.org/0000-0003-0423-5694

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