Range expansion of two Triatominae species in Oaxaca, Mexico: first report and molecular identification of Triatoma barberi and Triatoma dimidiata in the Cañada regionFIRST REVIEW ROUND - REVIEWERS' COMMENTSREVIEWERS' COMMENTS.
4 affiliations
- 1Universidad de La Cañada, Departamento de Farmacobiología, Teotitlán de Flores Magón, Oaxaca, México.
- 2Hospital Regional de Alta Especialidad de Zumpango, Unidad de Enseñanza e Investigación, Estado de México, México.
- 3Centro Médico Nacional La Raza, Unidad de Investigación Médica en Inmunología e Infectología IMSS, Ciudad de México, México.
- 4University of South Dakota, Sanford School of Medicine, Vermillion, South Dakota, USA.
Abstract
Background
Chagas disease (CD) is a chronic, disabling vector-borne disease caused by Trypanosoma cruzi and transmitted to humans by infected triatomine insects during blood meals. CD is currently endemic in 21 Latin American countries and the United States of America, with factors such as climate change, urbanisation, and migration contributing to the expansion of the vector's range from endemic to non-endemic regions. Globally, 44 countries have reported CD cases, indicating that it is an important public health problem.Objectives
To document the presence and geographic distribution of Triatoma dimidiata and Triatoma barberi in previously unreported areas, and to assess their epidemiological relevance for CD.Methods
Molecular, entomological, and spot pattern analyses were performed. DNA was extracted from triatomines, the ITS2 region amplified, cloned, and sequenced. An extensive search for reports on triatomine in Oaxaca was conducted from 2019 to 2024, and a distribution map was generated.Findings
We report the range expansion of two species to communities in La Cañada region. The CD vector range expansion poses an increased risk of infection in newly affected communities, given the higher prevalence of CD in Oaxaca.Main conclusions
Awareness of triatomine distribution is essential to prevent the spread of CD into non-endemic areas and to identify emerging endemic zones for epidemiological surveillance and disease control.
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BibTeX
@article{carbajalolivier2026range,
title = {{Range expansion of two Triatominae species in Oaxaca, Mexico: first report and molecular identification of Triatoma barberi and Triatoma dimidiata in the Cañada regionFIRST REVIEW ROUND - REVIEWERS' COMMENTSREVIEWERS' COMMENTS.}},
author = {Benjamín de Israel Carbajal-Olivier and Laura Isela Cruz-López and Saúl González-Guzmán and Rocío Rosas-López and Vladimir Paredes-Cervantes and Edward T Bagu and Citlalli Regalado-Santiago and Araceli Vaquero-Vera and Patricia González-Cano},
journal = {Memorias do Instituto Oswaldo Cruz},
year = {2026},
month = oct,
doi = {10.1590/0074-02760260093},
url = {https://europepmc.org/article/MED/42912046},
note = {CC BY},
}
RIS
TY - JOUR
TI - Range expansion of two Triatominae species in Oaxaca, Mexico: first report and molecular identification of Triatoma barberi and Triatoma dimidiata in the Cañada regionFIRST REVIEW ROUND - REVIEWERS' COMMENTSREVIEWERS' COMMENTS.
AU - Benjamín de Israel Carbajal-Olivier
AU - Laura Isela Cruz-López
AU - Saúl González-Guzmán
AU - Rocío Rosas-López
AU - Vladimir Paredes-Cervantes
AU - Edward T Bagu
AU - Citlalli Regalado-Santiago
AU - Araceli Vaquero-Vera
AU - Patricia González-Cano
PY - 2026
DA - 2026/10/16
JO - Memorias do Instituto Oswaldo Cruz
DO - 10.1590/0074-02760260093
UR - https://europepmc.org/article/MED/42912046
AB - Background Chagas disease (CD) is a chronic, disabling vector-borne disease caused by Trypanosoma cruzi and transmitted to humans by infected triatomine insects during blood meals. CD is currently endemic in 21 Latin American countries and the United States of America, with factors such as climate change, urbanisation, and migration contributing to the expansion of the vector's range from endemic to non-endemic regions. Globally, 44 countries have reported CD cases, indicating that it is an important public health problem.Objectives To document the presence and geographic distribution of Triatoma dimidiata and Triatoma barberi in previously unreported areas, and to assess their epidemiological relevance for CD.Methods Molecular, entomological, and spot pattern analyses were performed. DNA was extracted from triatomines, the ITS2 region amplified, cloned, and sequenced. An extensive search for reports on triatomine in Oaxaca was conducted from 2019 to 2024, and a distribution map was generated.Findings We report the range expansion of two species to communities in La Cañada region. The CD vector range expansion poses an increased risk of infection in newly affected communities, given the higher prevalence of CD in Oaxaca.Main conclusions Awareness of triatomine distribution is essential to prevent the spread of CD into non-endemic areas and to identify emerging endemic zones for epidemiological surveillance and disease control.
SN - 0074-0276
SN - 1678-8060
ER -