First Report of an Infected Triatomine Bug in an Urban Area of Tuxtla Gutierrez, Chiapas, Mexico

Fuentes-Vicente, José A. De; Gómez, Adriana Gómez; Santos-Hernández, Nancy G.; Ruiz-Castillejos, Christian; Gómez-Sánchez, Elisa; Vidal-López, Dolores G.; Flores-Villegas, Laura; Gutiérrez-Jiménez, Javier; Moreno-Rodríguez, Adriana

doi:10.22201/fesi.20072082e.2021.14.77383

Cited by 4 publications

(2 citation statements)

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“…The vectors in the states of Morelos, Michoacán, and Nayarit, Mexico had the highest infection rates (50%, 36.4%, and 29.2%, respectively), with new state and local records of T. dimidiata, T. gerstaeckeri, T. longipennis, T. mexicana, T. pallidipennis, and Pastrongylus rufotuberculatus [5]. In Chiapas, T. cruzi-infected T. dimidiata were documented for the first time inside an urban dwelling in Tuxtla Gutiérrez by De Fuentes-Vicente (2021) et al [36], indicating that this species in southern Mexico may be spreading into urban areas, similar to what has been observed in Perú by Delgado et al (2013) [37]. In Guerrero, 71 (32.4%) of collected triatomines were found infected with T. cruzi, but only T. pallidipennis was reported by Becerril-Flores (2003) [38].…”

Section: Discussionmentioning

confidence: 98%

Domestic Triatoma spp. Infections with Trypanosoma cruzi, Household Infestations, and Molecular Identification in Oaxaca, México

Fernández‐Santos

Trujillo-García

Hamer

et al. 2022

Insects

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In Latin America, Mexico is the country with the second highest annual estimated number of Chagas disease cases, caused by Trypanosoma cruzi, due to vector-borne transmission. The state of Oaxaca is the location of the first documented human cases of Chagas disease in Mexico and contained the highest T. cruzi seropositive rate (3.5%) from blood donors. Here, entomological surveys, from 2017 to 2019, were conducted to collect triatomines in 124 villages of 60 municipalities. Four principal domestic Triatoma spp. (Hemiptera: Triatominae), Triatoma phyllosoma, T. barberi, T. mazzotti, and T. dimidiata, of Oaxaca, Mexico were identified by morphology and molecular analysis of the barcode region of the cytochrome oxidase 1 (cox1 or COI or CO1) gene. A total of 41 out of 83 T. phyllosoma specimens examined by microscopy were positive for T. cruzi (49%), 49 out of 171 for T. barberi (28%), 31 out of 177 for T. mazzotti (17%), and none out of 10 for T. dimidiata (0%). Overall, the infestation index was 3.1% of households containing at least one triatomine; the crowding index was a mean of two Triatoma spp./household; and the colonization index was 0.38 for households based on presence of nymphs. Geographical distribution of triatomines in Oaxaca at the municipality level and endophilic behavior is also reported. Precise identification, endophilic habits, and infection rates of these triatomines are paramount for vector control programs of the Ministry of Health of Oaxaca and beyond.

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Section: Discussionmentioning

confidence: 98%

Domestic Triatoma spp. Infections with Trypanosoma cruzi, Household Infestations, and Molecular Identification in Oaxaca, México

Fernández‐Santos

Trujillo-García

Hamer

et al. 2022

Insects

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“…In addition, due to the position and magnitude of the central spots characterized by the Feret diameters; observed in the specimen, indicate its correspondence to a specimen of T. dimidiata of haplogroup 2 (Figure 2a), these spots are significantly different between T. dimidata haplogroups (Cruz et al, 2021). The presence of Chagas disease vectors in urban areas of Mexico is becoming more evident every day, but there are few reports on this event (De Fuentes‐Vicente et al, 2021; Rodríguez‐Bataz et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

Identification of a triatomine infected with Trypanosoma cruzi in an urban area of the state of Veracruz, Mexico: A comprehensive study

Paulina

López‐Monteon

López-Domínguez

et al. 2023

Zoonoses and Public Health

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Chagas disease, considered a neglected disease, was initially confined to rural localities in endemic areas; however, in recent years through the process of urbanization and migration of infected people, the disease is gaining importance in urban environments. The presence of the vector in urban areas in most cases is due to the passive transport of vectors, but recently, its presence seems to be linked to vector adaptation processes associated with climate change. This paper reports the occurrence of an infected triatomine in the peridomicile of a house in an urban area of Córdoba, Veracruz, Mexico, where the species found is described, the molecular characteristics and resistance to BZN and NFX of the Trypanosoma cruzi isolate obtained, as well as serological data of the dwelling inhabitants. These urban disease scenarios make it possible to generate new scientific knowledge and enable the creation of new control strategies for Chagas disease vectors.

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Mini-exon gene reveals circulation of TcI Trypanosoma cruzi (Chagas, 1909) (Kinetoplastida, Trypanosomatidae) in bats and small mammals in an ecological reserve in southeastern Mexico

Gómez-Sánchez¹,

Ochoa-Díaz-López²,

Espinoza‐Medinilla³

et al. 2022

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A wide variety of mammals are involved in the sylvatic cycle of Trypanosoma cruzi, the causative agent of Chagas disease. In many areas in Latin America where T. cruzi is endemic, this cycle is poorly known, and its main reservoirs have not been identified. In this study we analyzed T. cruzi infection in bats and other small mammals from an Ecological Reserve in southeastern Mexico. From January through March 2021, we captured wild individuals to extract cardiac and peripheral blood, and infection was detected by PCR of the mini-exon gene. In bats, the prevalence of infection was 16.36%, while in small mammals the prevalence was 28.57%. All of the samples that were positive for T. cruzi were identified as the TCI genotype. Our findings suggest that this zone, situated at the periphery of urban zones might have epidemiological relevance in the sylvatic cycle of T. cruzi and needs to be monitored. The infection of bats in this area is particularly concerning since the flight pattern of this populations overlaps with human settlements. Despite being subject to conservation protections, there continue to be anthropogenic actions that disturb the study area, which could exacerbate risks to public health.

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First Report of an Infected Triatomine Bug in an Urban Area of Tuxtla Gutierrez, Chiapas, Mexico

Cited by 4 publications

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Domestic Triatoma spp. Infections with Trypanosoma cruzi, Household Infestations, and Molecular Identification in Oaxaca, México

Domestic Triatoma spp. Infections with Trypanosoma cruzi, Household Infestations, and Molecular Identification in Oaxaca, México

Identification of a triatomine infected with Trypanosoma cruzi in an urban area of the state of Veracruz, Mexico: A comprehensive study

Mini-exon gene reveals circulation of TcI Trypanosoma cruzi (Chagas, 1909) (Kinetoplastida, Trypanosomatidae) in bats and small mammals in an ecological reserve in southeastern Mexico

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First Report of an Infected Triatomine Bug in an Urban Area of Tuxtla Gutierrez, Chiapas, Mexico

Cited by 4 publications

References 0 publications

Domestic Triatoma spp. Infections with Trypanosoma cruzi, Household Infestations, and Molecular Identification in Oaxaca, México

Domestic Triatoma spp. Infections with Trypanosoma cruzi, Household Infestations, and Molecular Identification in Oaxaca, México

Identification of a triatomine infected with Trypanosoma cruzi in an urban area of the state of Veracruz, Mexico: A comprehensive study

﻿Mini-exon gene reveals circulation of TcI Trypanosoma cruzi (Chagas, 1909) (Kinetoplastida, Trypanosomatidae) in bats and small mammals in an ecological reserve in southeastern Mexico

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Mini-exon gene reveals circulation of TcI Trypanosoma cruzi (Chagas, 1909) (Kinetoplastida, Trypanosomatidae) in bats and small mammals in an ecological reserve in southeastern Mexico