A5019900651- Evolution and Paleontology Studies
- Animal Ecology and Behavior Studies
- Bat Biology and Ecology Studies
- Viral Infections and Vectors
- Wildlife Ecology and Conservation
- Species Distribution and Climate Change
- Fire effects on ecosystems
- Genetic diversity and population structure
- Mosquito-borne diseases and control
- Viral Infections and Outbreaks Research
- Zoonotic diseases and public health
- Yersinia bacterium, plague, ectoparasites research
- Ecology and Vegetation Dynamics Studies
- Scarabaeidae Beetle Taxonomy and Biogeography
- Amphibian and Reptile Biology
- Environmental and Cultural Studies in Latin America and Beyond
- Parasite Biology and Host Interactions
- Vector-borne infectious diseases
- Vector-Borne Animal Diseases
- Gut microbiota and health
- Probiotics and Fermented Foods
- Clostridium difficile and Clostridium perfringens research
- Primate Behavior and Ecology
- High Altitude and Hypoxia
- Marine animal studies overview
Texas Tech University
2016-2025
Higher University of San Andrés
2020-2024
Academia Nacional de Ciencias de Bolivia
2024
Instituto Nacional de Biodiversidad
2021-2023
Universidade Federal de Minas Gerais
2015
Universidade de São Paulo
2015
University of Louisville
2015
National Institute for Mathematical and Biological Synthesis
2015
University of New Mexico
2000-2003
Departamento de Epidemiología
2001
I the spring of 1993, a previously undescribed disease emerged in Southwest, killing 10 people during an 8-week period May and June. Early infection, victims experienced flu-like symptoms for several days, but their condition suddenly rapidly deteriorated as lungs filled with fluids; death usually occurred within hours onset this crisis period. There was no cure, successful medication or treatment, agent (virus, bacterium, toxin) completely unknown. For first few weeks, mortality rate 70%....
AbstractIn the world's highest mountain ranges, uncertainty about upper elevational range limits of alpine animals represents a critical knowledge gap regarding environmental life and presents problem for detecting shifts in response to climate change. Here we report results mountaineering mammal surveys Central Andes, which led discovery multiple species mice living at extreme elevations that far surpass previously assumed mammals. We livetrapped small mammals from ecologically diverse...
Transferrin receptor 1 (TfR1) is a cellular for the New World hemorrhagic fever arenaviruses Machupo (MACV), Junín (JUNV), and Guanarito (GTOV). Each of these viruses specifically adapted to distinct rodent host species, but all cause human disease. Here we compare ability use various mammalian transferrin orthologs, including those South American rodents that serve as reservoirs MACV, JUNV, GTOV (Calomys callosus, Calomys musculinus, Zygodontomys brevicauda, respectively). Retroviruses...
The ability of a New World (NW) clade B arenavirus to enter cells using human transferrin receptor 1 (TfR1) strictly correlates with its cause hemorrhagic fever. Amapari (AMAV) and Tacaribe (TCRV), two nonpathogenic NW arenaviruses that do not use TfR1, are closely related the fevers. Here we show pseudotyped viruses bearing surface glycoprotein (GP) AMAV or TCRV can infect TfR1 orthologs several mammalian species, including those their respective natural hosts, small rodent Neacomys...
The Neotropics harbors a high diversity of species and several hypotheses have been proposed to account for this pattern. However, while forested domains are frequently studied, less is known from open vegetation formations occupying, altogether, larger area than the Amazon Forest. Here we evaluate role historical barriers riverine hypothesis in speciation patterns small mammals by analyzing an ancient rodent lineage (Thrichomys, Hystricomorpha). Phylogenetic biogeographic analyses were...
Here, we present a comprehensive phylogenetic analysis based on nuclear and mitochondrial DNA sequences of rodents the subfamily Sigmodontinae. The emphasis is placed large tribe Phyllotini; sampling includes for first time in any molecular‐based representatives several genera traditionally considered to be phyllotines. Given broad taxonomic sampling, results provide substantial improvements our knowledge both structure sigmodontine radiation phyllotine relationships. For instance,...
Habitat fragmentation and diversity loss due to increased conversion of natural habitats agricultural uses influence the distribution abundance wildlife species thus may change ecology pathogen transmission. We used hantaviruses in Panama as a research model determine whether anthropogenic environmental is associated with changes dynamics viral Specifically, we wanted hantavirus infection was correlated spatial attributes landscape at both large small scales or these are mediated by...
Phylogenetic analyses were conducted on cytochrome b sequence data of the most geographically and taxonomically broad sampling Cavia taxa to date. Primary objectives included providing first extensive molecular phylogenetic framework for genus, testing taxonomic systematic hypotheses previous authors insight into evolutionary biogeographic history genus. Support was found morphologically defined species C. aperea, tschudii, magna fulgida placement previously subject conflicting opinions...
Phylogeographic relationships were evaluated at the intraspecific level using nucleotide sequence data from mitochondrial cytochrome b gene of representative specimens "colilargo" (Oligoryzomys longicaudatus) 31 localities, along its distributional range over a large part western Andes and southern Argentina. Based on approximately 1,000 base pairs (bp), we recognized single species both Chilean Argentinean side as far least latitude 51°S, rejecting subspecific distinctiveness longicaudatus...
We present the most comprehensive systematic study to date of Necromys, a rodent genus distributed in open areas north and south Amazonia Andean grasslands. The is based on sequences cytochrome-b gene that were analyzed by parsimony Bayesian approaches. analyses include 62 specimens from 51 localities Argentina, Bolivia, Brazil, Colombia, Paraguay, Peru, Uruguay, Venezuela, representing all but 1 species currently recognized genus. Necromys was recovered as monophyletic group we found large...
We predicted that more-fragmented habitats are associated with lower diversity of small mammals and higher densities populations rodents hosts hantaviruses. compared distribution either or nonhosts hantaviruses in 6 Panamanian national parks adjacent areas varying degree human impacts. sampled forest, edge, anthropogenically disturbed habitats. The generalist Oligoryzomys fulvescens (reservoir Choclo virus) Zygodontomys brevicauda Calabazo were more abundant habitats, especially smaller...
We describe a new living genus and species of Sigmodontinae currently only known from the Brazilian National Park Sempre Vivas, Minas Gerais State. This rodent is characterized by unique combination traits that include, among others, long tail, with its distal tip (approximately 2.5 to 5 cm) entirely white; skull domed profile; rostrum an incipient rostral tube; noticeable small brachyodont molars reduced mesolophs mesostyles present on 1st 2nd upper molars. Cladistic analyses molecular (1...
Bats (Order: Chiroptera) harbor a high diversity of emerging pathogens presumably because their ability to fly and social behavior favor the maintenance, evolution, dissemination these pathogens. Until 2012, there was only one report presence Hantavirus in bats. Historically, it thought that viruses were harbored primarily by rodent insectivore small mammals. Recently, new species hantaviruses have been identified bats from Africa Asia continents expanding potential reservoirs range viruses....
Ichthyomyini, a morphologically distinctive group of Neotropical cricetid rodents, lacks an integrative study its systematics and biogeography. Since this tribe is crucial element the Sigmodontinae, most speciose subfamily Cricetidae, we conducted that includes recognized diversity (five genera 19 species distributed from southern Mexico to northern Bolivia). For report analyzed combined matrix composed four molecular markers (
Akodon, with about 42 living species, is the most diverse genus of subfamily Sigmodontinae. The Akodon boliviensis species group includes small-bodied, morphologically similar forms inhabiting Altiplano grasslands and grassland/forest ecotones eastern slope Andes, from central Peru to Argentina. Northwestern Argentina contains largest diversity group; taxonomic treatment these has been based largely on unsupported some weakly opinions as underscored by recurrent changes. Based morphologic...
Abstract A new species of rodent is added to the highly diverse genus Oecomys (Cricetidae, Sigmodontinae, Oryzomyini) based on specimens collected in Argentinian provinces Chaco and Formosa. The characterized by a derived carotid circulatory pattern, feature shared with O. concolor, mamorae, sydandersoni. unique combination morphological, morphometric, molecular characters, however, provides unambiguous evidence its validity as separate entity. Individuals are larger than other...