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Introduction
Current institution
Publications
Publications (38)
Human respiratory syncytial virus (HRSV) is a common cause of lower respiratory tract infections globally, and changes in viral epidemiology have been observed in many jurisdictions following the coronavirus disease 2019 (COVID-19) pandemic. Newly licensed vaccines and monoclonal antibodies are anticipated to alleviate the burden on healthcare syst...
In December 2024, human metapneumovirus (hMPV) gained international attention due to concerns over increases in cases in Chinese hospitals, leading the World Health Organization (WHO) to issue a statement indicating case numbers were within expected ranges. To assess potential variant emergence, 99 hMPV genomes, including 13 recent cases from Novem...
Accurate genomic characterization of respiratory syncytial virus (RSV) is crucial for studies of epidemiology and viral evolution, and monitoring potential escape from newly authorized vaccines and antivirals. We adapted a viral whole genome tiling amplicon panel (UW-ARTIC) and developed a custom bioinformatic pipeline for high-throughput, cost-eff...
A globally implemented unified phylogenetic classification for human respiratory syncytial virus (HRSV) below the subgroup level remains elusive. We formulated global consensus of HRSV classification on the basis of the challenges and limitations of our previous proposals and the future of genomic surveillance. From a high-quality curated dataset o...
Abstract
Background: Human respiratory syncytial virus (HRSV) is a common cause of lower respiratory tract infections globally. Newly-licensed prophylactic vaccines and monoclonal antibodies are anticipated to alleviate this burden; however, such interventions may exert selective pressures on HRSV evolution.
Methods: Whole-genome sequencing was p...
Background
Human rhinoviruses (RV) primarily cause the common cold, but infection outcomes vary from subclinical to severe cases, including asthma exacerbations and fatal pneumonia in immunocompromised individuals. To date, therapeutic strategies have been hindered by the high diversity of serotypes. Global surveillance efforts have traditionally f...
Leishmania (Viannia) spp. can harbor a double-stranded RNA virus known as Leishmania RNA virus 1 (LRV-1), whose presence has been reported in nine countries across the Americas and seven Leishmania species. Here, we studied 100 Leishmania (Viannia) isolates from patients with cutaneous leishmaniasis collected from different endemic areas in Panama...
A globally implemented unified classification for human respiratory syncytial virus (HRSV) below the subgroup level remains elusive. Here, we formulate the global consensus of HRSV classification based on the challenges and limitations of our previous proposals and the future of genomic surveillance. From a high-quality dataset of 1,480 HRSV-A and...
Background: Human rhinoviruses (RV) primarily cause the common cold, but infection outcomes vary from subclinical to severe cases, including asthma exacerbations and fatal pneumonia in immunocompromised individuals. To date, therapeutic strategies have been hindered by the high diversity of serotypes. Global surveillance efforts have traditionally...
Background:
Rhinovirus (RV) infections can progress from the upper (URT) to lower (LRT) respiratory tract in immunocompromised individuals, causing high rates of fatal pneumonia. Little is known about how RV evolves within hosts during infection.
Methods:
We sequenced RV complete genomes from 12 hematopoietic cell transplant patients with infect...
The second wave of COVID-19 occurred in South America in early 2021 and was mainly driven by Gamma and Lambda variants. In this study, we aimed to describe the emergence and local genomic diversity of the SARS-CoV-2 Lambda variant in Argentina, from its initial entry into the country until its detection ceased. Molecular surveillance was conducted...
Background
Human rhinovirus (HRV) infections can progress from the upper (URT) to lower (LRT) respiratory tract in immunocompromised individuals, causing high rates of fatal pneumonia. Little is known about how HRV evolves within hosts during infection.
Methods
We sequenced HRV complete genomes from 12 hematopoietic cell transplant patients with p...
We sequenced 54 respiratory syncytial virus (RSV) genomes collected during 2021-22 and 2022-23 outbreaks in Washington, USA, to determine the origin of increased RSV cases. Detected RSV strains have been spreading for >10 years, suggesting a role for diminished population immunity from low RSV exposure during the COVID-19 pandemic.
Introduction
Globally, the human respiratory syncytial virus (RSV) is one of the major causes of respiratory tract infections (LRTIs) in children. The scarcity of complete genome data limits our understanding of RSV spatiotemporal distribution, evolution, and viral variant emergence.
Methodology
Nasopharyngeal samples collected from hospitalized p...
The COVID-19 pandemic has lately been driven by Omicron. This work aimed to study the dynamics of SARS-CoV-2 Omicron lineages during the third and fourth waves of COVID-19 in Argentina. Molecular surveillance was performed on 3431 samples from Argentina, between EW44/2021 and EW31/2022. Sequencing, phylogenetic and phylodynamic analyses were perfor...
Mitigation measures against the COVID-19 pandemic affected the RSV seasonality and led to an unexpectedly high number of RSV cases in Washington State since October 2022. Here we describe the RSV genomic characteristics and evolutionary relationship of 2022 outbreak compared to the previous RSV outbreaks in the region and globally.
Introduction
: Coinfection with two SARS-CoV-2 viruses is still a very understudied phenomenon. Although next generation sequencing methods are very sensitive to detect heterogeneous viral populations in a sample, there is no standardized method for their characterization, so their clinical and epidemiological importance is unknown.
Material and m...
Molecular surveillance of SARS-CoV-2 is crucial for the early detection of new variants and lineages. In addition, detection of co-infections with more than one SARS-CoV-2 lineage has been sporadically reported. In this work, surveillance of SARS-CoV-2 variants was performed on 2,067 RNA samples (Ct > 30) obtained during December 2021 and January 2...
Molecular surveillance of SARS-CoV-2 is crucial to early detect new variants and lineages. In addition, detection of coinfections with more than one SARS-CoV-2 lineage have been sporadically reported. In this work, surveillance of SARS-CoV-2 variants was performed on 2067 RNA samples (Ct>30) obtained during December 2021 and January 2022 from Cordo...
Introduction: The community mitigation measures taken because of the COVID-19 pandemic had side effects on the circulation of the most frequent respiratory viruses during 2020. In the case of respiratory syncytial virus (RSV), an important paediatric pathogen, a decrease in the number of cases and delayed outbreaks was previously described.
Aim and...
SARS-CoV-2 variants with concerning characteristics have emerged since the end of 2020. Surveillance of SARS-CoV-2 variants was performed on a total of 4,851 samples from the capital city and 10 provinces of Argentina, during 51 epidemiological weeks (EWs) that covered the end of the first wave and the ongoing second wave of the COVID-19 pandemic i...
Molecular surveillance of SARS-CoV-2 variants was performed on a total of 2,406 samples from the capital city and nine provinces of Argentina, during 30 epidemiological weeks (EW) that covered the end of the first wave and the beginning of the ongoing second wave of the COVID-19 pandemic in the country (EW 44/2020 to EW 20/2021). The surveillance s...
Introduction:
Respiratory syncytial virus (RSV) is the leading cause of acute lower respiratory tract infection (ALRTI) in pediatrics. Preterm infants are at a higher risk for complications. We aimed to describe and compare the clinical and epidemiological characteristics associated with ALRTI due to RSV in preterm and term infants and to establis...
Here is a description of a protocol for whole genome sequencing of RSV from clinical samples (nasopharyngeal aspirates -NPA-). The protocol was tested with samples with viral loads as low as 10+03 viral copies/ml NPA. The RNA is amplified by RT-PCR in five overlapped fragments of around 2300-4500 nt in length by using specific primers which anneal...
The cover image is based on the Original Article Toward unified molecular surveillance of RSV: a proposal for genotype definition by Mariana Viegas, Inne Nauwelaers, Alfonsina Trento et al., https://doi.org/10.1111/irv.12715.
Background:
Human respiratory syncytial virus (RSV) is classified into antigenic subgroups A and B. Thirteen genotypes have been defined for RSV-A and 20 for RSV-B, without any consensus on genotype definition.
Methods:
We evaluated clustering of RSV sequences published in GenBank until February 2018 to define genotypes by using maximum likeliho...
Background
Respiratory syncytial virus (RSV) is the leading cause of acute lower respiratory infection (ALRI) in children. We aimed to describe the clinical–epidemiological pattern and risk factors for mortality associated with RSV infection.
Methods
Prospective, cross-sectional study of ALRI in children admitted to a Children’s Hospital among 200...
Over the last decade, the number of viral genome sequences deposited in available databases has grown exponentially. However, sequencing methodology vary widely and many published works have relied on viral enrichment by viral culture or nucleic acid amplification with specific primers rather than through unbiased techniques such as metagenomics. T...
Minimum (Min), maximum (Max) and average (Avg) depth of coverage with and without duplicated reads per gene per sample sequenced with C methodology.
(XLSX)
Additional coverage profiles obtained per sample per methodology.
C, E, H and I methodologies are indicated at the left of each profile and described in the manuscript. Sequenced virus and genome length are denoted in pink at the top of the coverages. Genome regions with depth of coverage upper than 4 are underlined in orange. GenBank accession num...
Here is a description of a protocol for whole genome sequencing of RSV from clinical samples (nasopharyngeal aspirates -NPA-). The protocol was tested with samples with viral loads as low as 10+03 viral copies/ml NPA. The RNA is amplified by RT-PCR in five overlapped fragments of around 2300-4500 nt in length by using specific primers which anneal...
The largest outbreak of dengue in Buenos Aires, Argentina, occurred during 2016. Phylogenetic, phylodynamic, and phylogeographic analyses of 82 samples from dengue patients revealed co-circulation of 2 genotype V dengue virus lineages, suggesting that this virus has become endemic to the Buenos Aires metropolitan area.
Additional information about the sequencing and analysis of dengue virus genomes.
Respiratory syncytial virus (RSV) is the main viral cause of hospitalization due to acute lower respiratory tract infections in infants worldwide. Several vaccines against RSV are under research and development, which are about to be approved. We evaluated transmission patterns in different settings to determine age-specific vaccination targets fro...
