A reduction in ecological niche for Trypanosoma cruzi-infected triatomine bugs
Por:
Villalobos G., Nava-Bolaños A., De Fuentes-Vicente J.A., Luis Tellez-Rendon, Juan, Huerta H., Martínez-Hernández F., Rocha-Ortega M., Gutiérrez-Cabrera A.E., Ibarra-Cerdeña C.N., Córdoba-Aguilar A.
Publicada:
16 may 2019
Resumen:
BackgroundTheory predicts that parasites can affect and thus drive their
hosts' niche. Testing this prediction is key, especially for
vector-borne diseases including Chagas disease. Here, we examined the
niche use of seven triatomine species that occur in Mexico, based on
whether they are infected or not with Trypanosoma cruzi, the vectors and
causative parasites of Chagas disease, respectively. Presence data for
seven species of triatomines (Triatoma barberi, T. dimidiata, T.
longipennis, T. mazzottii, T. pallidipennis, T. phyllosoma and T.
picturata) were used and divided into populations infected and not
infected by T. cruzi. Species distribution models were generated with
Maxent 3.3.3k. Using distribution models, niche analysis tests of
amplitude and distance to centroids were carried out for infected vs
non-infected populations within species.ResultsInfected populations of
bugs of six out of the seven triatomine species showed a reduced
ecological space compared to non-infected populations. In all but one
case (T. pallidipennis), the niche used by infected populations was
close to the niche centroid of its insect host.ConclusionsTrypanosoma
cruzi may have selected for a restricted niche amplitude in triatomines,
although we are unaware of the underlying reasons. Possibly the fact
that T. cruzi infection bears a fitness cost for triatomines is what
narrows the niche breadth of the insects. Our results imply that Chagas
control programmes should consider whether bugs are infected in models
of triatomine distribution.
Filiaciones:
Villalobos G.:
Hosp Gen Dr Manuel Gea Gonzalez, Secretaria Salud, Mexico City, DF, Mexico
Hospital General Dr. Manuel Gea González, Secretaría de Salud, Mexico City, Mexico
Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Mexico City, Mexico
Nava-Bolaños A.:
Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City, DF, Mexico
Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Mexico City, Mexico
De Fuentes-Vicente J.A.:
Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City, DF, Mexico
Univ Ciencias & Artes Chiapas, Inst Ciencias Biol, Tuxtla Gutierrez, Chiapas, Mexico
Instituto de Ciencias Biológicas, Universidad de Ciencias y Artes de Chiapas, Tuxtla Gutiérrez, Chiapas, Mexico
Luis Tellez-Rendon, Juan:
Secretaria Salud Mexico, Inst Diagnost & Referencia Epidemiol, Mexico City, DF, Mexico
Huerta H.:
Secretaria Salud Mexico, Inst Diagnost & Referencia Epidemiol, Mexico City, DF, Mexico
Instituto de Diagnóstico y Referencia Epidemiológicos, Secretaría de Salud, Mexico City, Mexico
Martínez-Hernández F.:
Hosp Gen Dr Manuel Gea Gonzalez, Secretaria Salud, Mexico City, DF, Mexico
Hospital General Dr. Manuel Gea González, Secretaría de Salud, Mexico City, Mexico
Rocha-Ortega M.:
Hosp Gen Dr Manuel Gea Gonzalez, Secretaria Salud, Mexico City, DF, Mexico
Hospital General Dr. Manuel Gea González, Secretaría de Salud, Mexico City, Mexico
Gutiérrez-Cabrera A.E.:
Inst Nacl Salud Publ, CONACyT, Ctr Invest Enfermedades Infecciosas, Cuernavaca, Morelos, Mexico
CONACyT-Centro de Investigación Sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, Mexico
Ibarra-Cerdeña C.N.:
CINVESTAV, Ctr Invest & Estudios Avanzados IPN, Dept Ecol Humana, Unidad Merida, Merida 97310, Yucatan, Mexico
Departamento de Ecología Humana, Centro de Investigación y Estudios Avanzados Del IPN (Cinvestav), Unidad Mérida, Mérida, Yucatán, 97310, Mexico
Córdoba-Aguilar A.:
Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City, DF, Mexico
Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Mexico City, Mexico
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