Background The SARS-CoV-2 delta (B.1.617.2) variant was first detected in England in March,
2021. It has since rapidly become the predominant lineage, owing to high transmissibility. …

Epidemic C. difficile (027/BI/NAP1) has rapidly emerged in the past decade as the leading
cause of antibiotic-associated diarrhea worldwide. However, the key events in evolutionary …

Global dispersal and increasing frequency of the SARS-CoV-2 spike protein variant D614G
are suggestive of a selective advantage but may also be due to a random founder effect. We …

We report severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike ΔH69/V70
in multiple independent lineages, often occurring after acquisition of receptor binding motif …

Background The SARS-CoV-2 variant B.1.1.7 was first identified in December, 2020, in
England. We aimed to investigate whether increases in the proportion of infections with this …

Analysis of the draft genome sequence of the opportunistic pathogen Propionibacterium acnes
type strain NCTC 737 (=ATCC 6919) revealed five genes with sequence identity to the co-…

Chronic obstructive pulmonary disease (COPD) is currently the third most common cause of
global mortality. Acute exacerbations of COPD frequently necessitate hospital admission to …

The emergence of SARS‐CoV‐2 variants has exacerbated the COVID‐19 global health
crisis. Thus far, all variants carry mutations in the spike glycoprotein, which is a critical …

Bacterial speciation is a fundamental evolutionary process characterized by diverging genotypic
and phenotypic properties. However, the selective forces that affect genetic adaptations …

Objective: To assess the association of vaginal commensal and low-grade pathogenic
bacteria including Ureaplasma parvum, Ureaplasma urealyticum, Mycoplasma hominis, …