A5024930713- Salmonella and Campylobacter epidemiology
- Animal Virus Infections Studies
- Bacteriophages and microbial interactions
- Viral gastroenteritis research and epidemiology
- Trypanosoma species research and implications
- SARS-CoV-2 and COVID-19 Research
- Genomics and Phylogenetic Studies
- Virus-based gene therapy research
- Insect symbiosis and bacterial influences
- Parvovirus B19 Infection Studies
- Mosquito-borne diseases and control
- SARS-CoV-2 detection and testing
- Viral Infections and Vectors
- Microbial infections and disease research
- Molecular Biology Techniques and Applications
- Animal Disease Management and Epidemiology
- Respiratory viral infections research
- Oral microbiology and periodontitis research
- Insect-Plant Interactions and Control
- Vector-borne infectious diseases
- Leptospirosis research and findings
- Aquaculture disease management and microbiota
- Virology and Viral Diseases
- COVID-19 Clinical Research Studies
- Veterinary medicine and infectious diseases
Universidad de la República de Uruguay
2016-2025
Universidad La República
2024
Centro Uruguayo de Imagenología Molecular
2013-2019
Universidad de Montevideo
2012
Canine parvovirus (CPV), a fast-evolving single-stranded DNA virus, comprises three antigenic variants (2a, 2b, and 2c) with different frequencies genetic variability among countries. The contribution of co-infection recombination to the CPV is far from being fully elucidated. Here we took advantage natural population, recently formed by convergence divergent CPV-2c CPV-2a strains, study recombination. Complete sequences viral coding region strains 40 samples were generated analyzed using...
Abstract Campylobacter fetus is a venereal pathogen of cattle and sheep, an opportunistic human pathogen. It often assumed that C. infection occurs in humans as zoonosis through food chain transmission. Here we show mammalian consists distinct evolutionary lineages, primarily associated with either or bovine hosts. We use whole-genome phylogenetics on 182 strains from 17 countries to provide evidence may have originated around 10,500 years ago “jumped” into during the livestock domestication...
During a screening study to determine the presence of species genus Campylobacter in reptiles, three putative strains (RC7, RC11 and RC20T) were isolated from different individuals western Hermann's tortoise (Testudo hermanni hermanni). Initially, these isolates characterized as representing C ampylobacter fetus subsp. by multiplex PCR partial 16S rRNA gene sequence analysis. Further whole- genome characterization revealed considerable differences compared other species. A polyphasic was...
Abstract Canine parvovirus (CPV) is a fast-evolving single-stranded DNA virus that causes one of the most significant infectious diseases dogs. Although dispersed over long distances in past, current populations are considered to be spatially confined and with only few instances migration between specific localities. It unclear whether these dynamics occur South America where global studies have not been performed. The aim this study analyze patterns genetic variability American CPV explore...
The genus Campylobacter includes some of the most relevant pathogens for human and animal health; continuous effort in their characterization has also revealed new species putatively involved different kind infections. Nowadays, available genomic data comprise a wide variety with pathogenic potential niche preferences. In this work, we contribute to enlarge information presenting first genome sputorum bv. use already sequenced organisms analyze emergence evolution pathogenicity preferences...
The analysis of genetic diversity in SARS-CoV-2 is the focus several studies, providing insights into how virus emerged and evolves. Most common changes are single or point nucleotide substitutions; meanwhile, insertions deletions (indels) have been identified as a less frequent source viral variability. Here, we report emergence 12-nucleotide deletion ORF7a, resulting 4-amino acid in-frame deletion. Δ12 variant was viruses from patients outbreak represents first this South American...
Campylobacter (C.) fetus (epsilonproteobacteria) is an important veterinary pathogen.This species currently divided into C. subspecies (subsp.)fetus (Cff) and subsp.venerealis (Cfv).Cfv the causative agent of bovine genital Campylobacteriosis, infectious disease that leads to severe reproductive problems in cattle worldwide.Cff a more general pathogen causes mainly sheep although can also be affected.Here we describe multiplex PCR method detect differentiate between single step.The assay was...
The aim of this work was to identify causes abortion through laboratory investigations in sheep flocks Uruguay. One hundred cases abortion, comprising 58 fetuses, 36 fetuses with their placentas, and 6 placentas were investigated 2015-2021. Cases subjected gross microscopic pathologic examinations, microbiological serological testing for the identification including protozoal, bacterial, viral pathogens. An etiologic diagnosis determined 46 (46%) cases, 33 (33%) caused by infectious...
Campylobacter fetus is a pathogen of major concern for animal and human health. The species shows great intraspecific variation, with three subspecies: C. subsp. fetus, venerealis, testudinum. affects broad range hosts induces abortion in sheep cows. venerealis restricted to cattle causes the endemic disease bovine genital campylobacteriosis, which triggers reproductive problems responsible economic losses. testudinum has been proposed recently based on genetically divergent strains isolated...
The epidemiological importance of Chagas disease vectors largely depends on their spreading ability and adaptation to domestic habitats. Triatoma patagonica is a secondary vector endemic Argentina, it has been found colonizing domiciles most commonly peridomiciliary structures in several Argentine provinces morphological variation along its distribution range have described. To asses if population differentiation represents geographic variants or true biological species, multiple genetic...
ABSTRACT Campylobacter fetus subsp. venerealis is the causative agent of bovine genital campylobacteriosis, a sexually transmitted disease distributed worldwide. biovar Intermedius strains differ in their biochemical behavior and are prevalent some countries. We report first genome sequence for this biovar, isolated from bull prepuce.
MaterialMepraia gajardoi inhabits arid and sub-arid costal regions of northern Chile (Regions I II) where it is the principal vector Trypanosoma cruzi.Adult specimens were collected in mornings evenings February 2002, town Arica (Region I) around Military History Museum on promontory.Eight males three females for this study.A distinctive morphological characteristic species alary polymorphism: all are macropterous micropterous.Gonial mitosis was studied both sexes, but meiosis can only be...
Infectious bursal disease virus (IBDV) is an economically relevant and widespread pathogen that produces immunosuppression in young chickens. IBDV genetically classified into seven genogroups (G1–G7), where the traditional classic, variant very virulent strains correspond to G1, G2 G3, respectively. The G4 strains, also known as 'distinct' (dIBDV), have recently acquired increased relevance because of their prevalence notorious impair poultry industry South America. Here, worldwide dIBDV...
Deletions frequently occur in the six accessory genes of SARS-CoV-2, but most genomes with deletions are sporadic and have limited spreading capability. Here, we analyze ORF7a N.7 lineage, a unique Uruguayan clade from Brazilian B.1.1.33 lineage. Thirteen samples collected during early SARS-CoV-2 wave Uruguay had ORF7a. Complete were obtained by Illumina next-generation sequencing, confirmed Sanger sequencing capillary electrophoresis. The lineage includes several individuals 12-nucleotide...
Campylobacter fetus (Cff) is a major infectious cause of abortion in sheep worldwide, and an opportunistic human pathogen. Information on Cff as ovine abortifacient South America limited. We describe case caused by multidrug resistant strain Uruguay. In August 2017, 3/57 pregnant ewes (5.3%) aborted whithin one week. Histopathologic examination the placenta ewe revealed severe neutrophilic fibrinonecrotizing placentitis with vasculitis thrombosis chorionic arterioles. was isolated...