scholarly journals Ecological niche modeling for visceral leishmaniasis in the state of Bahia, Brazil, using genetic algorithm for rule-set prediction and growing degree day-water budget analysis

2006 ◽  
Vol 1 (1) ◽  
pp. 115 ◽  
Author(s):  
Prixia Nieto ◽  
John B. Malone ◽  
Maria E. Bavia
Keyword(s):  
Genetic Algorithm ◽  
Visceral Leishmaniasis ◽  
Water Budget ◽  
Ecological Niche ◽  
Ecological Niche Modeling ◽  
The State ◽  
Niche Modeling ◽  
Degree Day ◽  
Budget Analysis ◽  
Rule Set

scholarly journals Microsatellite based molecular epidemiology of Leishmania infantum from re-emerging foci of visceral leishmaniasis in Armenia and pilot risk assessment by ecological niche modeling

2021 ◽  
Vol 15 (4) ◽  
pp. e0009288
Author(s):  
Katrin Kuhls ◽  
Olga Moskalenko ◽  
Anna Sukiasyan ◽  
Dezdemonia Manukyan ◽  
Gayane Melik-Andreasyan ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Visceral Leishmaniasis ◽  
Central Asia ◽  
Causative Agent ◽  
Ecological Niche ◽  
Ecological Niche Modeling ◽  
Niche Modeling ◽  
Population Structure Analysis ◽  
First Time

Background Visceral leishmaniasis (VL) is re-emerging in Armenia since 1999 with 167 cases recorded until 2019. The objectives of this study were (i) to determine for the first time the genetic diversity and population structure of the causative agent of VL in Armenia; (ii) to compare these genotypes with those from most endemic regions worldwide; (iii) to monitor the diversity of vectors in Armenia; (iv) to predict the distribution of the vectors and VL in time and space by ecological niche modeling. Methodology/Principal findings Human samples from different parts of Armenia previously identified by ITS-1-RFLP as L. infantum were studied by Multilocus Microsatellite Typing (MLMT). These data were combined with previously typed L. infantum strains from the main global endemic regions for population structure analysis. Within the 23 Armenian L. infantum strains 22 different genotypes were identified. The combined analysis revealed that all strains belong to the worldwide predominating MON1-population, however most closely related to a subpopulation from Southeastern Europe, Maghreb, Middle East and Central Asia. The three observed Armenian clusters grouped within this subpopulation with strains from Greece/Turkey, and from Central Asia, respectively. Ecological niche modeling based on VL cases and collected proven vectors (P. balcanicus, P. kandelakii) identified Yerevan and districts Lori, Tavush, Syunik, Armavir, Ararat bordering Georgia, Turkey, Iran and Azerbaijan as most suitable for the vectors and with the highest risk for VL transmission. Due to climate change the suitable habitat for VL transmission will expand in future all over Armenia. Conclusions Genetic diversity and population structure of the causative agent of VL in Armenia were addressed for the first time. Further genotyping studies should be performed with samples from infected humans, animals and sand flies from all active foci including the neighboring countries to understand transmission cycles, re-emergence, spread, and epidemiology of VL in Armenia and the entire Transcaucasus enabling epidemiological monitoring.

Analysis of the geographical distribution of Psammolestes Bergroth (Hemiptera: Heteroptera: Reduviidae: Triatominae) in South America, with new records of Psammolestes tertius Lent & Jurberg

Zootaxa ◽  
2009 ◽  
Vol 2033 (1) ◽  
pp. 41-48 ◽  
Author(s):  
RODRIGO GURGEL-GONÇALVES ◽  
REINALDA BANDEIRA SILVA
Keyword(s):  
South America ◽  
Geographical Distribution ◽  
Ecological Niche ◽  
Ecological Niche Modeling ◽  
New Records ◽  
Climatic Factors ◽  
Niche Modeling ◽  
Niche Differences ◽  
Rule Set ◽  
Venezuelan Llanos

The genus Psammolestes is comprised of three recognized Rhodniini species: P. arthuri, P. coreodes, and P. tertius. The geographical distribution of these triatomines in South America was analyzed using ecological niche modeling. Additionally, temperature, precipitation, and altitude limits for these species were estimated. The genetic algorithm for rule-set production (GARP) was applied to predict their geographical distribution. The models used were able to predict, with high probabilities, the occurrence of P. tertius in open woodlands of South America (mainly Cerrado and Caatinga ecoregions), making it the Psammolestes species with the widest distribution. P. arthuri presented a discontinuous potential distribution covering the Venezuelan Llanos and southeastern/southwestern fringes of Amazonia. P. coreodes presented the southernmost area of distribution, occurring mainly in the Argentinean Chaco. The models also support potential areas of co-occurrence for P. tertius and P. coreodes in southwestern Brazil. Clear ecological niche differences were observed for the three species: while P. arthuri occurred in warm and humid areas, P. coreodes occupied the driest and coldest areas. P. tertius presented intermediate climatological limits and occurred in the highest altitudes. Although climatic factors may determine the triatomine distribution, biotic factors, such as the association with thornbirds (Phacellodomus), may also influence the geographical distribution of Psammolestes species. Finally, this study confirms the usefulness of ecological niche modeling as a tool for studies on biogeographical aspects of triatomines.

scholarly journals Eratyrus mucronatus Stål, 1859 (Hemiptera: Reduviidae: Triatominae): first report in the State of Acre, Brazil, and updated geographic distribution in South America

Check List ◽  
2014 ◽  
Vol 9 (4) ◽  
pp. 851 ◽  
Author(s):  
Marcos Takashi Obara ◽  
Acigelda Da Silva Cardoso ◽  
Maria Carmelinda Gonçalves Pinto ◽  
Cláudio Rodrigues de Souza ◽  
Rafaella Albuquerque e Silva ◽  
...  
Keyword(s):  
South America ◽  
Geographic Distribution ◽  
Ecological Niche ◽  
Ecological Niche Modeling ◽  
The State ◽  
Niche Modeling ◽  
Distribution Map ◽  
First Report ◽  
Triatomine Species ◽  
Potential Geographic Distribution

A new occurrence record of Eratyrus mucronatus (Hemiptera, Reduviidae, Triatominae) is reported from Rio Branco, Acre, Brazil. The distribution of this triatomine species was updated and a potential geographic distribution map in South America was presented based on ecological niche modeling.

scholarly journals Biogeografía del tomate Solanum lycopersicum var. cerasiforme (Solanaceae) en su centro de origen (sur de América) y de domesticación (México)

2019 ◽  
Vol 67 (4) ◽  
Author(s):  
Gino Delices ◽  
Raúl Otto ◽  
Rosalia Nuñez Pastrana ◽  
Pablo Andrés Meza ◽  
Ricardo Serna-Lagunez ◽  
...  
Keyword(s):  
South America ◽  
Solanum Lycopersicum ◽  
Environmental Conditions ◽  
Ecological Niche ◽  
Ecological Niche Modeling ◽  
New Records ◽  
The State ◽  
Niche Modeling ◽  
Climatic Variables ◽  
Tomato Production

The understanding geography and ecology role in the distribution of Solanum lycopersicum var. cerasiforme is essential for knowledge of areas with potential for tomato production and conservation. In the present work, we analyzed the environmental conditions of the center of origin of the species in South America and we compared them with records in Mexico, particularly in the state of Veracruz, tomato domestication region. We used eight climatic variables predictors and the latitude and longitude data of the species collections registered in literature and database to run two models, the first one for the south of America and the second one for Mexico. We evaluated the models by using the partial ROC method; we conducted a niche similarity and equivalency test to compare both models. We carried out a fieldwork to observe new records of the species and register the environmental conditions in which they growth. The main climatic variables of temperature were the most important for the ecological niche modeling of South America and the ecological niche modeling of Mexico. The models performed very well cause the partial roc test showed significant value for both models1.86 y 1.71 (p<0.0001). Based on our fieldwork, we registered 27 new records, we can find wild tomatoes between 14 and 2 100 amsl in areas with a range of temperature average 19-24 ºC and annual average precipitation 1 166-2 260 mm. Finally, we find out that there is climatic differentiation between South America and Mexico (most areas of the state of Veracruz) for the species.

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.

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