scholarly journals Modelling the climatic suitability of Chagas disease vectors on a global scale

eLife ◽  
2020 ◽  
Vol 9 ◽  
Author(s):  
Fanny E Eberhard ◽  
Sarah Cunze ◽  
Judith Kochmann ◽  
Sven Klimpel
Keyword(s):  
Latin America ◽  
Chagas Disease ◽  
Global Scale ◽  
Surveillance Program ◽  
Climatic Suitability ◽  
Vector Surveillance ◽  
Niche Modelling ◽  
African Countries ◽  
Triatomine Species ◽  
Triatoma Rubrofasciata

The Triatominae are vectors for Trypanosoma cruzi, the aetiological agent of the neglected tropical Chagas disease. Their distribution stretches across Latin America, with some species occurring outside of the Americas. In particular, the cosmopolitan vector, Triatoma rubrofasciata, has already been detected in many Asian and African countries. We applied an ensemble forecasting niche modelling approach to project the climatic suitability of 11 triatomine species under current climate conditions on a global scale. Our results revealed potential hotspots of triatomine species diversity in tropical and subtropical regions between 21°N and 24°S latitude. We also determined the climatic suitability of two temperate species (T. infestans, T. sordida) in Europe, western Australia and New Zealand. Triatoma rubrofasciata has been projected to find climatically suitable conditions in large parts of coastal areas throughout Latin America, Africa and Southeast Asia, emphasising the importance of an international vector surveillance program in these regions.

Africa—Latin America—Europe—Asia—Middle East

1979 ◽  
Vol 19 (211) ◽  
pp. 204-213
Keyword(s):  
Latin America ◽  
Middle East ◽  
Financial Support ◽  
Red Cross ◽  
African Countries ◽  
The People

At the beginning of June, the ICRC made a further appeal to governments and National Red Cross Societies for their material and financial support to continue its humanitarian activities for the victims of the conflicts in Africa. It requested, for the period from 1 July to 31 December,the sum of 35.8 million Swiss francs, equivalent to about 5 million Swiss francs per month. The ICRC warned prospective donors that, if no help was swiftly forthcoming, it would be compelled to reduce the activities of its delegations in various African countries, and that the consequences would mean considerable hardship for the people in need of ICRC aid.

scholarly journals Potential Distribution of Chagas Disease Vectors (Hemiptera, Reduviidae, Triatominae) in Colombia, Based on Ecological Niche Modeling

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Gabriel Parra-Henao ◽  
Laura C. Suárez-Escudero ◽  
Sebastián González-Caro
Keyword(s):  
Chagas Disease ◽  
Sierra Nevada ◽  
Geographic Distribution ◽  
Ecological Niche ◽  
Ecological Niche Modeling ◽  
Climatic Factors ◽  
Niche Modeling ◽  
Triatomine Species ◽  
Local Risk ◽  
And Control

Ecological niche modeling of Triatominae bugs allow us to establish the local risk of transmission of the parasiteTrypanosoma cruzi,which causes Chagas disease.This information could help to guide health authority recommendations on infection monitoring, prevention, and control. In this study, we estimated the geographic distribution of triatomine species in Colombia and identified the relationship between landscape structure and climatic factors influencing their occurrence. A total of 2451 records of 4 triatomine species (Panstrongylus geniculatus,Rhodnius pallescens,R. prolixus, andTriatoma maculata) were analyzed.The variables that provided more information to explain the ecologic niche of these vectors were related to precipitation, altitude, and temperature. We found that the species with the broadest potential geographic distribution wereP. geniculatus,R. pallescens, andR. prolixus. In general, the models predicted the highest occurrence probability of these vectors in the eastern slope of the Eastern Cordillera, the southern region of the Magdalena valley, and the Sierra Nevada of Santa Marta.

scholarly journals The burden of congenital Chagas disease and implementation of molecular diagnostic tools in Latin America

2018 ◽  
Vol 3 (5) ◽  
pp. e001069 ◽  
Author(s):  
Albert Picado ◽  
Israel Cruz ◽  
Maël Redard-Jacot ◽  
Alejandro G Schijman ◽  
Faustino Torrico ◽  
...  
Keyword(s):  
Latin America ◽  
Chagas Disease ◽  
Diagnostic Algorithm ◽  
Diagnostic Methods ◽  
Diagnosis And Treatment ◽  
Molecular Diagnostic ◽  
Diagnostic Tools ◽  
Molecular Tests ◽  
Epidemiological Impact ◽  
And Performance

It is estimated that between 8000 and 15 000 Trypanosoma cruzi infected babies are born every year to infected mothers in Chagas disease endemic countries. Currently, poor access to and performance of the current diagnostic algorithm, based on microscopy at birth and serology at 8–12 months after delivery, is one of the barriers to congenital Chagas disease (CCD) control. Detection of parasite DNA using molecular diagnostic tools could be an alternative or complement to current diagnostic methods, but its implementation in endemic regions remains limited. Prompt diagnosis and treatment of CCD cases would have a positive clinical and epidemiological impact. In this paper, we analysed the burden of CCD in Latin America, and the potential use of molecular tests to improve access to early diagnosis and treatment of T. cruzi infected newborns.

scholarly journals Development of a Diagnostic Marker for Phlebotomus papatasi to Initiate a Potential Vector Surveillance Program in North America

Insects ◽  
2018 ◽  
Vol 9 (4) ◽  
pp. 162 ◽  
Author(s):  
Austin Merchant ◽  
Tian Yu ◽  
Jizhe Shi ◽  
Xuguo Zhou
Keyword(s):  
Rapid Identification ◽  
International Travel ◽  
Sand Fly ◽  
Surveillance Program ◽  
Sand Flies ◽  
Phlebotomus Papatasi ◽  
Diagnostic Assay ◽  
Vector Surveillance ◽  
Geographical Regions ◽  
Imminent Threat

Phlebotomus papatasi, an Old World sand fly species, is primarily responsible for the transmission of leishmaniasis, a highly infectious and potentially lethal disease. International travel, especially military rotations, between domestic locations and P. papatasi-prevalent regions in the Middle East poses an imminent threat to the public health of US citizens. Because of its small size and cryptic morphology, identification of P. papatasi is challenging and labor-intensive. Here, we developed a ribosomal DNA-polymerase chain reaction (PCR)-based diagnostic assay that is capable of detecting P. papatasi genomic DNA from mixed samples containing multiple sand flies native to the Americas. Serial dilution of P. papatasi samples demonstrated that this diagnostic assay could detect one P. papatasi from up to 255 non-target sand flies. Due to its simplicity, sensitivity and specificity, this rapid identification tool is suited for a long-term surveillance program to screen for the presence of P. papatasi in the continental United States and to reveal geographical regions potentially vulnerable to sand fly-borne diseases.

scholarly journals Chagas disease: review of needs, neglect, and obstacles to treatment access in Latin America

2017 ◽  
Vol 50 (3) ◽  
pp. 296-300 ◽  
Author(s):  
Eloan Pinheiro ◽  
Lucia Brum-Soares ◽  
Renata Reis ◽  
Juan-Carlos Cubides
Keyword(s):  
Latin America ◽  
Chagas Disease ◽  
Treatment Access
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