Presence of Virginia opossum (Didelphis virginiana) and Pic (Triatoma dimidiata) infected with Trypanosoma cruzi in urban areas: preliminary evaluation in the city of Campeche, Mexico

Tamay-Segovia, Paulino; Blum-Domínguez, Selene; Núñez-Oreza, Luis Alberto; Martínez‐Hernández, Fernando; Gómez-Solano, Mónica I.; Maldonado-Velázquez, María Guadalupe; Retana-Guiascón, Oscar G.

doi:10.4067/s0719-81322017000100035

Cited by 4 publications

(4 citation statements)

References 11 publications

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“…The percentage of infected D. virginianus determined in the current study in western Mexico (50.3%) was similar to the 52% prevalence observed in D. virginianus from six southwestern and southern states of the USA (Brown et al, 2010), to the 52% prevalence of infection obtained in this species from Campeche, Mexico (Tamay-Segovia et al, 2017) and to the 53.9% prevalence found in D. virginianus from southeastern Mexico (Ruiz-Piña and Cruz-Reyes, 2002), which confirms the importance of the Virginia opossum as a reservoir of T. cruzi (Velasco-Castrejón and Rivas-Sánchez, 2008) in different geographic areas.…”

Section: Pathological Changessupporting

confidence: 87%

Prevalence of Trypanosoma cruzi and organ alterations in Virginia opossums (Didelphis virginiana) from western Mexico – short communication

Carnevali¹,

Nogueda‐Torres

Villagrán-Herrera

et al. 2017

Acta Veterinaria Hungarica

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Small populations of Virginia opossum (Didelphis virginiana) in western Mexico are endangered by hunting and natural predators as well as by different kinds of diseases. After two serological analyses using Serodia® latex particle agglutination and indirect haemagglutination (IHA) tests, 35 (53.03%) of 66 collected opossums in two small towns in western Mexico were positive for the presence of Trypanosoma cruzi. Twenty-eight of the 35 seropositive opossums had pathological lesions: 11 had changes in only one organ, 13 in two organs, and four had pathological changes in three organs. Splenomegaly was the most common finding in the examined opossums, followed by hepatomegaly. These potentially fatal pathological changes could contribute to the scarcity of the opossum population, even leading to the extinction of this species in western Mexico.

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Section: Pathological Changessupporting

confidence: 87%

Prevalence of Trypanosoma cruzi and organ alterations in Virginia opossums (Didelphis virginiana) from western Mexico – short communication

Carnevali¹,

Nogueda‐Torres

Villagrán-Herrera

et al. 2017

Acta Veterinaria Hungarica

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“…The occurrence of native species of triatomines in the urban home environment of Montes Claros ratifies the potential for vector transmission of T. cruzi in the endemic region of northern Minas Gerais (Galvão, 2014). The presence of triatomines in urban areas has been shown in other studies carried out in Brazil (Dias, Queiroz, Diotaiuti, et al., 2016; Dias, Queiroz, Martins, et al., 2016; Ribeiro et al., 2016; Santos et al., 2020), Peru (Khatchikian et al., 2015), Mexico (Tamay‐Segovia et al., 2017) and Argentina (Gaspe et al., 2020; Provecho et al., 2021; Vallve et al., 1996) where an occurrence of T. infestans infected with T. cruzi was observed in the urban area (Provecho et al., 2021).…”

Section: Discussionmentioning

confidence: 60%

Occurrence and spatial distribution of triatomines (Hemiptera: Reduviidae) in the urban area of the municipality of Montes Claros, Northern Minas Gerais, Brazil

Campos

Gonçalves

Ursine

et al. 2021

Zoonoses and Public Health

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The north of the Brazilian state of Minas Gerais is classified as an area of high risk of vectorial transmission of Chagas disease (CD) or of reestablishing transmission in the home, but the Chagas disease control programme is disjointed. The study evaluated the occurrence, natural infection and the spatial distribution of species of triatomines associated with climatic variations in the urban area of Montes Claros, a municipality endemic to CD in the north of Minas Gerais, Brazil. Triatomine data were obtained from passive entomological surveillance actions of the Chagas Disease Control Program (Programa de Controle de Doença de Chagas—PCDCh), registered by the Zoonosis Control Center (Centro de Controle de Zoonoses—CCZ) from 2009 to 2019. A total of 277 triatomines belonging to eight species were collected, and of these, 203 insects were examined. It was found that 46.2% of triatomines were captured inside the home and 8.3% around the home. The natural infection rate was 6.9%; 14 specimens showed natural infection by Trypanosoma cruzi (12 females and 2 males), and of these, 13 were found in the home and one in an uninformed location. The number of triatomine records collected was significantly higher in the month of September (p = .01), and there was an inverse correlation between the number of triatomines and the relative humidity of the air (p < .001). It was verified that the highest triatomine densities are located in transition areas between urban infrastructure (32.12%) and pasture (25.72%). The diversity of species of triatomines infected with T. cruzi in residential units in urban areas in the municipality of Montes Claros is worrying, as it suggests a potential risk of transmission of the parasite to domestic animals and humans.

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“…However, due to the invasion of natural areas, land-use processes, land-cover change, and climate change, the disease may spread to different non-endemic regions, including urban areas. Previous studies have evaluated the influence of human-modified land cover at the local level, for triatomines and for mammals infected by T. cruzi [14,27,28,40]. Studies addressing the influence of climate change on Chagas disease risk have focused on triatomine species distribution at the regional level, but without including information for other species that are positive for T. cruzi [41] and are therefore potential agents in the transmission cycle.…”

Section: Discussionmentioning

confidence: 99%

“…However, the rapid and disorganized growth of urban areas, which involves the invasion of wild species' habitats, can substantially alter the frequency of parasite-vector-host-human interactions, generating a dynamic that can significantly increase the risk of T. cruzi infection in urban areas [26]. Recently, triatomines infected by T. cruzi have been collected in major cities [27,28]. These findings indicate that domestic mammals (dogs, cats) and synanthrope species such as rats could play an important role as blood sources for triatomine bugs in the absence of sylvatic mammals [4,6,26].…”

Section: Introductionmentioning

confidence: 99%

Toward New Epidemiological Landscapes of Trypanosoma cruzi (Kinetoplastida, Trypanosomatidae) Transmission under Future Human-Modified Land Cover and Climatic Change in Mexico

et al. 2022

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Chagas disease, caused by the protozoa Trypanosoma cruzi, is an important yet neglected disease that represents a severe public health problem in the Americas. Although the alteration of natural habitats and climate change can favor the establishment of new transmission cycles for T. cruzi, the compound effect of human-modified landscapes and current climate change on the transmission dynamics of T. cruzi has until now received little attention. A better understanding of the relationship between these factors and T. cruzi presence is an important step towards finding ways to mitigate the future impact of this disease on human communities. Here, we assess how wild and domestic cycles of T. cruzi transmission are related to human-modified landscapes and climate conditions (LUCC-CC). Using a Bayesian datamining framework, we measured the correlations among the presence of T. cruzi transmission cycles (sylvatic, rural, and urban) and historical land use, land cover, and climate for the period 1985 to 2012. We then estimated the potential range changes of T. cruzi transmission cycles under future land-use and -cover change and climate change scenarios for 2050 and 2070 time-horizons, with respect to “green” (RCP 2.6), “business-as-usual” (RCP 4.5), and “worst-case” (RCP 8.5) scenarios, and four general circulation models. Our results show how sylvatic and domestic transmission cycles could have historically interacted through the potential exchange of wild triatomines (insect vectors of T. cruzi) and mammals carrying T. cruzi, due to the proximity of human settlements (urban and rural) to natural habitats. However, T. cruzi transmission cycles in recent times (i.e., 2011) have undergone a domiciliation process where several triatomines have colonized and adapted to human dwellings and domestic species (e.g., dogs and cats) that can be the main blood sources for these triatomines. Accordingly, Chagas disease could become an emerging health problem in urban areas. Projecting potential future range shifts of T. cruzi transmission cycles under LUCC-CC scenarios we found for RCP 2.6 no expansion of favourable conditions for the presence of T. cruzi transmission cycles. However, for RCP 4.5 and 8.5, a significant range expansion of T. cruzi could be expected. We conclude that if sustainable goals are reached by appropriate changes in socio-economic and development policies we can expect no increase in suitable habitats for T. cruzi transmission cycles.

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Presence of Virginia opossum (Didelphis virginiana) and Pic (Triatoma dimidiata) infected with Trypanosoma cruzi in urban areas: preliminary evaluation in the city of Campeche, Mexico

Cited by 4 publications

References 11 publications

Prevalence of Trypanosoma cruzi and organ alterations in Virginia opossums (Didelphis virginiana) from western Mexico – short communication

Prevalence of Trypanosoma cruzi and organ alterations in Virginia opossums (Didelphis virginiana) from western Mexico – short communication

Occurrence and spatial distribution of triatomines (Hemiptera: Reduviidae) in the urban area of the municipality of Montes Claros, Northern Minas Gerais, Brazil

Toward New Epidemiological Landscapes of Trypanosoma cruzi (Kinetoplastida, Trypanosomatidae) Transmission under Future Human-Modified Land Cover and Climatic Change in Mexico

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