Universidad Peruana Cayetano Heredia

Host-seeking behavior and dispersal of Triatoma infestans, a vector of Chagas disease, under semi-field conditions

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dc.contributor.author Castillo Neyra, Ricardo
dc.contributor.author Barbu, Corentin M.
dc.contributor.author Salazar Sánchez, Renzo Sadath
dc.contributor.author Borrini, Katty
dc.contributor.author Naquira Velarde, Cesar Gabriel
dc.contributor.author Levy, Michael Z.
dc.date.accessioned 2019-02-06T14:53:10Z
dc.date.available 2019-02-06T14:53:10Z
dc.date.issued 2015
dc.identifier.uri https://hdl.handle.net/20.500.12866/5390
dc.description.abstract Chagas disease affects millions of people in Latin America. The control of this vector-borne disease focuses on halting transmission by reducing or eliminating insect vector populations. Most transmission of Trypanosoma cruzi, the causative agent of Chagas disease, involves insects living within or very close to households and feeding mostly on domestic animals. As animal hosts can be intermittently present it is important to understand how host availability can modify transmission risk to humans and to characterize the host-seeking dispersal of triatomine vectors on a very fine scale. We used a semi-field system with motion-detection cameras to characterize the dispersal of Triatoma infestans, and compare the behavior of vector populations in the constant presence of hosts (guinea pigs), and after the removal of the hosts. The emigration rate - net insect population decline in original refuge - following host removal was on average 19.7% of insects per 10 days compared to 10.2% in constant host populations (p = 0.029). However, dispersal of T. infestans occurred in both directions, towards and away from the initial location of the hosts. The majority of insects that moved towards the original location of guinea pigs remained there for 4 weeks. Oviposition and mortality were observed and analyzed in the context of insect dispersal, but only mortality was higher in the group where animal hosts were removed (p-value <0.01). We discuss different survival strategies associated with the observed behavior and its implications for vector control. Removing domestic animals in infested areas increases vector dispersal from the first day of host removal. The implications of these patterns of vector dispersal in a field setting are not yet known but could result in movement towards human rooms. en_US
dc.language.iso eng
dc.publisher Public Library of Science
dc.relation.ispartofseries PLoS Neglected Tropical Diseases
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Female en_US
dc.subject Time Factors en_US
dc.subject Animals en_US
dc.subject Motor Activity en_US
dc.subject Guinea Pigs en_US
dc.subject Chagas Disease/transmission en_US
dc.subject Circadian Rhythm en_US
dc.subject Feeding Behavior/physiology en_US
dc.subject Insect Vectors/physiology en_US
dc.subject Photography en_US
dc.subject Triatoma/physiology en_US
dc.subject Video Recording en_US
dc.title Host-seeking behavior and dispersal of Triatoma infestans, a vector of Chagas disease, under semi-field conditions en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.1371/journal.pntd.0003433
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#3.03.06
dc.relation.issn 1935-2735


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