Ecological and Evolutionary Science
Research Article | Ecological and Evolutionary ScienceGut Microbiome of the Canadian Arctic InuitNon-Western populations have been shown to have distinct gut microbial communities shaped by traditional diets. The hitherto-uncharacterized microbiome of the Inuit may help us to better understand health risks specific to this population such as diabetes and obesity, which increase in prevalence as many Inuit transition to a Western diet. Here we show that even Inuit consuming a mostly traditional diet have a broadly Western-like...
Research Article | Ecological and Evolutionary ScienceSpecies in the Cryptococcus gattii Complex Differ in Capsule and Cell Size following Growth under Capsule-Inducing ConditionsInfections with the fungal pathogen Cryptococcus gattii have been increasing in recent years. Recently, four different species have been described within C. gattii, which correspond to four previously known molecular genotypes (VGI to VGIV). Examining traits related to infection and disease is...
Research Article | Ecological and Evolutionary ScienceA Phylogeny-Based Global Nomenclature System and Automated Annotation Tool for H1 Hemagglutinin Genes from Swine Influenza A VirusesA fundamental goal in the biological sciences is the definition of groups of organisms based on evolutionary history and the naming of those groups. For influenza A viruses (IAVs) in swine, understanding the hemagglutinin (HA) genetic lineage of a circulating strain aids in vaccine antigen selection and allows for inferences about vaccine efficacy. Previous reporting of H1 virus HA in swine relied on colloquial names, frequently with...
Resource Report | Ecological and Evolutionary ScienceDNA from Dust: Comparative Genomics of Large DNA Viruses in Field Surveillance SamplesDespite both clinical and laboratory data that show increased virulence in field isolates of MDV-1 over the last half century, we do not yet understand the genetic basis of its pathogenicity. Our knowledge of genome-wide variation between strains of this virus comes exclusively from isolates that have been cultured in the laboratory. MDV-1 isolates tend to lose virulence during repeated cycles of replication in the laboratory, raising...
Research Article | Ecological and Evolutionary ScienceGenome Diversity, Recombination, and Virulence across the Major Lineages of ParacoccidioidesCharacterization of genetic differences between lineages of the dimorphic human-pathogenic fungus Paracoccidioides can identify changes linked to important phenotypes and guide the development of new diagnostics and treatments. In this article, we compared genomes of 31 diverse isolates representing the major lineages of Paracoccidioides spp. and completed the first annotated genome sequences for the PS3 and PS4...
Editor's Pick Research Article | Ecological and Evolutionary ScienceSystematic Search for Evidence of Interdomain Horizontal Gene Transfer from Prokaryotes to Oomycete LineagesHorizontal gene transfer (HGT) is the nonvertical inheritance of genetic material by transfer between different species. HGT is an important evolutionary mechanism for prokaryotes and in some cases is responsible for the spread of antibiotic resistance from resistant to benign species. Genome analysis has shown that examples of HGT are not as frequent in eukaryotes, but when they do occur they may have important evolutionary...
Research Article | Ecological and Evolutionary ScienceComparison of the Gene Coding Contents and Other Unusual Features of the GC-Rich and AT-Rich Branch ProboscivirusesMultiple species of herpesviruses from three different lineages of the Proboscivirus genus (EEHV1/6, EEHV2/5, and EEHV3/4/7) infect either Asian or African elephants, but the highly lethal hemorrhagic disease is largely confined to Asian elephant calves and is predominantly associated with EEHV1. In the accompanying paper [P. D. Ling et al., mSphere 1(3):e00081-15, http://dx....
Research Article | Ecological and Evolutionary ScienceComplete Genome Sequence of Elephant Endotheliotropic Herpesvirus 4, the First Example of a GC-Rich Branch ProboscivirusMultiple species of herpesviruses from three different lineages of the Proboscivirus genus (EEHV1/6, EEHV2/5, and EEHV3/4/7) infect both Asian and African elephants, but lethal hemorrhagic disease is largely confined to Asian elephant calves and is predominantly associated with EEHV1. Milder disease caused by EEHV5 or EEHV4 is being increasingly recognized as well, but little is known about the latter, which is estimated to...
Research Article | Ecological and Evolutionary ScienceIncM Plasmid R1215 Is the Source of Chromosomally Located Regions Containing Multiple Antibiotic Resistance Genes in the Globally Disseminated Acinetobacter baumannii GC1 and GC2 ClonesTwo lineages of extensively antibiotic-resistant A. baumannii currently plaguing modern medicine each acquired resistance to all of the original antibiotics (ampicillin, tetracycline, kanamycin, and sulfonamides) by the end of the 1970s and then became resistant to antibiotics from newer families after they were introduced in the 1980s. Here, we show that, in both of...
Research Article | Ecological and Evolutionary ScienceHighly Variable Streptococcus oralis Strains Are Common among Viridans Streptococci Isolated from PrimatesStreptococcus pneumoniae is a rare example of a human-pathogenic bacterium among viridans streptococci, which consist of commensal symbionts, such as the close relatives Streptococcus mitis and S. oralis. We have shown that...