Trypanosoma cruzi  over the ocean: Insular zones of Chile with presence of infected vector  Mepraia  species

Rives-Blanchard, Ninette; Torres-Pérez, Fernando; Ortíz, Sylvia; Solari, Aldo; Campos‐Soto, Ricardo

doi:10.1016/j.actatropica.2017.05.020

Cited by 11 publications

(13 citation statements)

References 15 publications

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“…A few examples were reported that revealed the enzootic T. cruzi cycle that included mammals and triatomines in islands of Brazil (Grisard et al, 2000;Das Xavier et al, 2014). In Chile, T. cruzi-infected triatomines were reported in Santa María and Pan de Azúcar islands (Rives-Blanchard et al, 2017), raising question related to the mammal hosts involved in this T. cruzi cycle. On Pan de Azúcar Island, two A. olivacea were positive to T. cruzi by kDNA PCR and satDNA qPCR (infection rate 6.06%, Table 1, Fig.…”

Section: Discussionmentioning

confidence: 99%

Trypanosoma cruzi-infected triatomines and rodents co-occur in a coastal island of northern Chile

Campos‐Soto

Díaz-Campusano

Quiroga

et al. 2020

PeerJ

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Trypanosoma cruzi, the cause agent of Chagas disease, is transmitted mainly by blood-feeding insects of the subfamily Triatominae. The T. cruzi life cycle alternates between triatomines and mammalian hosts, excluding birds and reptiles. Triatomines of Mepraia genus are wild vectors of T. cruzi in Chile. Mepraia specimens infected with T. cruzi have been detected in Pan de Azúcar and Santa María islands. The most common vertebrates that inhabit these islands are birds and reptiles, and it is unknown whether small mammals are present. Consequently, it is relevant to know whether there are any T. cruzi-infected small mammals on those islands to elucidate the T. cruzi cycle. To clarify this crossroads, islands of northern Chile were explored to determine if T. cruzi-infected triatomines and rodents co-occur in islands of northern Chile. T. cruzi DNA was detected by conventional and real-time PCR in three islands: on Santa María and Pan de Azúcar islands T. cruzi was detected in Mepraia sp samples, while on Pan de Azúcar (6.1%) and Damas islands (15%) was detected in the rodent Abrothrix olivacea. We show for the first time in Chile the occurrence of insular rodents infected with T. cruzi, and a complete T. cruzi life cycle in a coastal island. Our results provide new insights to understand the T. cruzi infection in the wild cycle.

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Section: Discussionmentioning

confidence: 99%

Trypanosoma cruzi-infected triatomines and rodents co-occur in a coastal island of northern Chile

Campos‐Soto

Díaz-Campusano

Quiroga

et al. 2020

PeerJ

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“…The T. cruzi life cycle alternates between triatomines and mammalian host species, while birds and reptiles are refractory to infection [51,52]. It has been reported that individuals of M. parapatriica feed mainly on seabirds and reptiles in Pan de Azúcar Island [10]; however, hosts have not been studied in Santa María Island due to the recent description of the occurrence of kissing bugs [11]. Strikingly, triatomines infected with T. cruzi were reported both in Pan de Azúcar and Santa María Islands, raising the question of how the T. cruzi life cycle is completed with the high abundance of hosts refractory to infection.…”

Section: Insights To Understand T Cruzi Infection In Coastal Islandsmentioning

confidence: 99%

“…Island populations of Mepraia genus were reported inhabiting in Pan de Azúcar Island at 1.8 km from the continent (26˚9'S) in the Atacama Region [10]; these individuals were characterized as M. parapatrica using morphological approaches [6]. Insular individuals of Mepraia were also reported on Santa María Island at 1.9 km from the continent (23˚28' S) in the Antofagasta Region [11] an area located between M. gajardoi and M. parapatrica distribution [7]. Interestingly, the presence of kissing bugs infected with T. cruzi were reported both on Pan de Azúcar and Santa María Islands [11].…”

Section: Introductionmentioning

confidence: 99%

“…Insular individuals of Mepraia were also reported on Santa María Island at 1.9 km from the continent (23˚28' S) in the Antofagasta Region [11] an area located between M. gajardoi and M. parapatrica distribution [7]. Interestingly, the presence of kissing bugs infected with T. cruzi were reported both on Pan de Azúcar and Santa María Islands [11]. The biogeographic origin of the island triatomines is unknown.…”

Section: Introductionmentioning

confidence: 99%

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Biogeographic origin and phylogenetic relationships of Mepraia (Hemiptera, Reduviidae) on islands of northern Chile

et al. 2020

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Chagas disease is one of the main zoonoses mediated by vectors in America. The etiological agent is the protozoan Trypanosoma cruzi, transmitted mainly by hematophagous insects of the subfamily Triatominae. Mepraia species are triatomines endemic to Chile that play an important role in T. cruzi transmission in the wild cycle and are potential vectors for humans. In addition to the continental distribution, populations of Mepraia genus have been reported inhabiting islands of northern Chile. The presence of individuals of Mepraia in insular areas might be explained through passive dispersion by marine birds or by vicariance of an ancestral widespread population. To clarify the biogeographic origin and phylogenetic relationships of island individuals of Mepraia, mitochondrial COI and cyt b genes were sequenced in individuals from island and continental areas. Gene sequences were used to estimate phylogenetic relationships, divergence dates and migration rates between insular and continental populations. The dates of divergence estimates are congruent with sea level and tectonic changes that originated the islands during Pleistocene. Migration rates suggest symmetric historical island-continent gene flow. We suggest that the origin of island triatomines can be explained by both vicariance and dispersion. Phylogenetic relationships show that individuals from Santa María Island and the continent clustered in a clade different from those previously reported, indicating a new lineage of Mepraia genus. This study will contribute to understand the origin of the T. cruzi infection in coastal islands of northern Chile.

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“…Egaña et al () collected 70 3 rd , 4 th , and 5 th instar nymphs of M. gajardoi in the northern zone of Chile and 65 nymphs of 3 rd , 4 th , and 5 th instars of M. spinolai in central Chile. Rives‐Blanchard et al () collected 45 specimens of Mepraia spp . on Santa María Island and near its mainland region, as well as 13 bugs on Pan de Azúcar Island and the continental region of Pan de Azúcar.…”

Section: Information On Collections Of Three Species Of Mepraia In Chmentioning

confidence: 99%

New records of Mepraia (Hemiptera, Reduviidae, Triatominae) in Chile

Rosa

Oliveira

Laserre

2019

Journal of Vector Ecology

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Trypanosoma cruzi over the ocean: Insular zones of Chile with presence of infected vector Mepraia species

Cited by 11 publications

References 15 publications

Trypanosoma cruzi-infected triatomines and rodents co-occur in a coastal island of northern Chile

Trypanosoma cruzi-infected triatomines and rodents co-occur in a coastal island of northern Chile

Biogeographic origin and phylogenetic relationships of Mepraia (Hemiptera, Reduviidae) on islands of northern Chile

New records of Mepraia (Hemiptera, Reduviidae, Triatominae) in Chile

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