Results 51 to 60 of about 482,160 (387)

The Avian Acetabulum: Small Structure, but Rich with Illumination and Questions

open access: yesDiversity, 2023
The idea that birds are maniraptoran theropod dinosaurs is now considered an evolutionary consensus. An “open” (i.e., completely or substantially perforate) acetabulum is considered an important synapomorphy verifying the bird–dinosaur nexus.
Alan Feduccia
doaj   +1 more source

A distinct Fusobacterium nucleatum clade dominates the colorectal cancer niche

open access: yesNature
Fusobacterium nucleatum (Fn), a bacterium present in the human oral cavity and rarely found in the lower gastrointestinal tract of healthy individuals1, is enriched in human colorectal cancer (CRC) tumours2–5.
Martha A. Zepeda-Rivera   +21 more
semanticscholar   +1 more source

A novel Ruminococcus gnavus clade enriched in inflammatory bowel disease patients

open access: yesGenome Medicine, 2017
BackgroundInflammatory bowel disease (IBD) is characterized by chronic inflammation of the gastrointestinal tract that is associated with changes in the gut microbiome.
A. B. Hall   +21 more
semanticscholar   +1 more source

A new species in the major malaria vector complex sheds light on reticulated species evolution [PDF]

open access: yes, 2019
Complexes of closely related species provide key insights into the rapid and independent evolution of adaptive traits. Here, we described and studied Anopheles fontenillei sp.n., a new species in the Anopheles gambiae complex that we recently discovered ...
Akone-Ella O.   +11 more
core   +1 more source

Potential Fifth Clade of Candida auris, Iran, 2018

open access: yesEmerging Infectious Diseases, 2019
Four major clades of Candida auris have been described, and all infections have clustered in these 4 clades. We identified an isolate representative of a potential fifth clade, separated from the other clades by >200,000 single-nucleotide polymorphisms ...
N. Chow   +5 more
semanticscholar   +1 more source

A Unique Clade of SARS-CoV-2 Viruses is Associated with Lower Viral Loads in Patient Upper Airways

open access: yesmedRxiv, 2020
The rapid spread of SARS-CoV-2, the causative agent of Coronavirus disease 2019 (COVID-19), has been accompanied by the emergence of distinct viral clades, though their clinical significance remains unclear.
R. Lorenzo-Redondo   +10 more
semanticscholar   +1 more source

Novel Variants of Clade 2.3.4 Highly Pathogenic Avian Influenza A(H5N1) Viruses, China

open access: yesEmerging Infectious Diseases, 2013
We characterized 7 highly pathogenic avian influenza A(H5N1) viruses isolated from poultry in China during 2009–2012 and found that they belong to clade 2.3.4 but do not fit within the 3 defined subclades.
Min Gu   +10 more
doaj   +1 more source

Ongoing mpox outbreak in Kamituga, South Kivu province, associated with monkeypox virus of a novel Clade I sub-lineage, Democratic Republic of the Congo, 2024

open access: yesEuro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin
Since the beginning of 2023, the number of people with suspected monkeypox virus (MPXV) infection have sharply increased in the Democratic Republic of the Congo (DRC). We report near-to-complete MPXV genome sequences derived from six cases from the South
Leandre Murhula Masirika   +17 more
semanticscholar   +1 more source

Observation of persistent flow of a Bose-Einstein condensate in a toroidal trap

open access: yes, 2007
We have observed the persistent flow of Bose-condensed atoms in a toroidal trap. The flow persists without decay for up to 10 s, limited only by experimental factors such as drift and trap lifetime.
Andersen, M. F.   +5 more
core   +1 more source

Molecular and fossil evidence place the origin of cichlid fishes long after Gondwanan rifting. [PDF]

open access: yes, 2013
Cichlid fishes are a key model system in the study of adaptive radiation, speciation and evolutionary developmental biology. More than 1600 cichlid species inhabit freshwater and marginal marine environments across several southern landmasses.
Alex Dornburg   +9 more
core   +1 more source

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