Absence of domestic triatomine colonies in an area of the coastal region of Ecuador where Chagas disease is endemic

Rhodnius ecuadoriensis is considered the second most important vector of Chagas disease in Ecuador. It is distributed across six of the 24 provinces and occupies intradomiciliary, peridomiciliary and sylvatic habitats. This study was conducted in six communities within the coastal province of Guayas. Triatomine searches were conducted in domestic and peridomestic habitats and bird nests using manual searches, live-bait traps and sensor boxes. Synantrhopic mammals were captured in the domestic and peridomestic habitats. Household searches (n = 429) and randomly placed sensor boxes (n = 360) produced no live triatomine adults or nymphs. In contrast, eight nymphs were found in two out of six searched Campylorhynchus fasciatus (Troglodytidae) nests. Finally, Trypanosoma cruzi DNA was amplified from the blood of 10% of the 115 examined mammals. Environmental changes in land use (intensive rice farming), mosquito control interventions and lack of intradomestic adaptation are suggested among the possible reasons for the lack of domestic triatomine colonies

Characterization of a recent malaria outbreak in the autonomous indigenous region of Guna Yala, Panama

BackgroundThis study aims to describe the epidemiological and entomological factors associated with a recent malaria outbreak that occurred in 2012 in a socially marginalized population from Guna Yala Comarca in Panama.MethodsA descriptive and observational study was conducted by analysing demographic and epidemiological data from all malaria cases registered during 2012 in the Comarca Guna Yala, Panama. Malaria intensity indicators were calculated during the study period. Entomological evaluations were performed monthly, from October to December 2012, in the three communities that presented the most intense malaria transmission during the first semester of 2012. Anopheles breeding habitats were also characterized.ResultsDuring the studied period, 6754 blood smears were examined (17.8 % of the total population), and 143 were confirmed as positive for Plasmodium vivax. A significant increase of malaria transmission risk indicators (API: 3.8/1000, SPR: 2.1 %) was observed in Guna Yula, when compared with previous years, and also in comparison with estimates from the whole country. Anopheles albimanus was the most abundant and widespread (877; 72.0 %) vector species found in the three localities, followed by Anopheles punctimacula (231; 19.0 %) and Anopheles aquasalis (110; 9.0 %). Three An. albimanus pools were positive for P. vivax, showing an overall pooled prevalence estimate of 0.014.ConclusionsData analysis confirmed that during 2012 a malaria epidemic occurred in Guna Yala. Panama. This study provides baseline data on the local epidemiology of malaria in this vulnerable region of Panama. This information will be useful for targeting control strategies by the National Malaria Control Programme

How Is the World Shaped by Infrastructure Projects That Have Been Cancelled or Stalled?

This report summarizes the findings of the Unimplemented Development Synthesis Workshop held at the National Socio-Environmental Synthesis Center (SESYNC) in Annapolis, Maryland from January 21–23, 2020.This report is the result of an interdisciplinary, international effort to examine the socio-environmental consequences of large-scale infrastructure projects that have been planned but not built—and reasons why projects have been cancelled or stalled. Collectively, our team examined eight cases of cancelled or stalled infrastructure projects in the Americas, drawing from our experiences in academic research and professional practice. Across cases, we found that projects were cancelled or stalled for interrelated reasons including environmental impact assessments, litigation and legislation, strong opposition and media attention, and/or increasing costs and faltering justifications. Our work further shows that cancelled or stalled development projects can create socio-environmental consequences that persist and cascade over time. The consequences of unbuilt infrastructure projects include the following: the development of new research networks; the establishment of precedents for socio-environmental assessment; the strengthening of social movements, often against the proposed development; changes in land use and land tenure; the exposure of environmental racism and injustice; and shifted development interventions. In sum, paying attention to cancelled and stalled projects provides a transdisciplinary lens for understanding broader processes of development, knowledge, power, science, and socio-environmental change. We conclude that when proposed large infrastructure projects are assessed, additional attention needs to be given to how they may shape landscapes and societies even if they are never built.This work was supported by the National Socio-Environmental Synthesis Center (SESYNC), under funding received from the National Science Foundation, Grant # DBI-1639145