uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Habitats, dispersion and invasion of sylvatic Triatoma dimidiata (Hemiptera:Reduviidae:Triatominae) in Peten, Guatemala
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolutionary Biology, Systematic Zoology.
Show others and affiliations
2003 (English)In: Journal of medical entomology, ISSN 0022-2585, Vol. 40, no 6, 800-806 p.Article in journal (Refereed) Published
Abstract [en]

Dispersion and invasion capacity of sylvatic populations of Triatoma dimidiata (Latreille) were investigated during 14 mo by means of experimental chicken coops installed in a nature reserve within the Maya Biosphere, Petén, Guatemala. In addition, palm trees, underground archeological holes (chultunes) and piles of limestones within the forest were inspected as potential sylvatic habitats of T. dimidiata. From the three types of sylvatic habitats we inspected, all served as shelter and breeding sites for T dimidiata. The natural infection of these bugs (n = 72) with Trypanosoma cruzi (Chagas) was high (25%) and represent a risk for humans who colonize the forest. T. dimidiata quickly invaded the experimental chicken coops installed in the primary forest, albeit at very low densities. However, only one adult bug was encountered in the chicken coops installed in a secondary forest. Dispersal of adult T. dimidiata was most apparent at the end of the dry season. Overall, our results indicate a potential risk for invasion by sylvatic T. dimidiata of domestic environments in this area, with a risk of T. cruzi transmission to humans. We suggest that a system of community-based surveillance should be developed to detect new infestations and organize prompt treatment of any new cases of acute Chagas disease that may result.

Place, publisher, year, edition, pages
2003. Vol. 40, no 6, 800-806 p.
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-90911DOI: 10.1603/0022-2585-40.6.800PubMedID: 14765656OAI: oai:DiVA.org:uu-90911DiVA: diva2:163429
Available from: 2003-10-16 Created: 2003-10-16 Last updated: 2013-05-08Bibliographically approved
In thesis
1. Ecology and Control of Triatomine (Hemiptera: Reduviidae) Vectors of Chagas Disease in Guatemala, Central America
Open this publication in new window or tab >>Ecology and Control of Triatomine (Hemiptera: Reduviidae) Vectors of Chagas Disease in Guatemala, Central America
2003 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis analyses several factors affecting the control of triatomines in Guatemala. There are three synantropic triatomines in Guatemala, i.e., Rhodnius prolixus, Triatoma dimidiata and T. nitida. Their distibution is mainly at an altitude between 800 and 1500 m a.s.l. R. prolixus and T. nitida have localized but scaterred distibution while T. dimidiata is present in 21 of the 22 departments in the country. Several investigations have shown that R. prolixus could be relatively easily eradicated while T. dimidiata may be more difficult to control, since it is present in domestic, peridomestic and sylvatic environments showing high diversity and a variety of epidemiological characteristics. Based on the incidence of Trypanosma cruzi infection in humans in the distributional areas of the triatomines, R. prolixus appear to be a more competent vector than T. dimidiata. This is despite the fact that these vectors have similar infection rates. Inside houses, R. prolixus and T. dimidiata and in artificial environments, T. ryckmani and T. dimidiata, preferred the northern side of the walls. Therefore, selective application of insecticides should focus on walls and furniture located in the northern part of the house. House improvements reduced the infestation of triatomines, and could be used as a complement to insecticidal spraying. Although T. dimidiata is not an efficient vector its wide distribution, versatility in occupying different habitats and capacity to disperse render this species difficult to control in Central America. Thus, only few months after insecticidal spraying T. dimidiata had reinfested the domestic environments. Morphometic methodology and genetic markers have been developed to differentiate within-species populations of T. dimidiata and T. nitida. Studies on the migration patterns of sylvatic T. dimidiata and T. ryckmani have been performed in order to clarify the colonization patterns. The adults migrate, in particular, in the dry part of the year. This finding may be of help in attempts to control T. dimidiata.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2003. 22 p.
Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1104-232X ; 895
Biology, Chagas disease, control, epidemiology, ecology, Triatoma dimidiata, T. nitida, T. ryckmani, Rhodnius prolixus, serology, populations movements, geographic distribution., Biologi
National Category
Biological Sciences
urn:nbn:se:uu:diva-3606 (URN)91-554-5756-8 (ISBN)
Public defence
2003-11-25, Ekman salen, Evoluationary Biology Center, Uppsala, 13:00
Available from: 2003-10-16 Created: 2003-10-16Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed
By organisation
Systematic Zoology
In the same journal
Journal of medical entomology
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 286 hits
ReferencesLink to record
Permanent link

Direct link