Preprints

Filtering by Subject: Microbiology

When bacteria are phage playgrounds: interactions between viruses, cells and mobile genetic elements

Eugen Pfeifer, Jorge Moura de Sousa, Marie Touchon, et al.

Published: 2022-07-01
Subjects: Ecology and Evolutionary Biology, Genetics and Genomics, Life Sciences, Microbiology

Studies of viral adaptation have focused on the selective pressures imposed by hosts. However, there is increasing evidence that interactions between viruses, cells, and other mobile genetic elements (MGEs) are determinant to the success of infections. These interactions are often associated with antagonism and competition, but sometimes involve cooperation or parasitism. They involve mechanism [...]

Psychological and Cultural Factors Influencing Antibiotic Prescription

Francisco Dionisio, Fernando Baquero, Marina Fuertes

Published: 2022-06-20
Subjects: Bacteriology, Child Psychology, Health Psychology, Life Sciences, Medicine and Health, Medicine and Health Sciences, Microbiology, Psychiatry and Psychology, Psychological Phenomena and Processes, Psychology, Social and Behavioral Sciences, Sociology, Sociology of Religion

Humans have been giving a selective advantage to antibiotic-resistant bacteria worldwide by inundating the environment with antimicrobials for about one century. As a result, the efficacy of antibiotics has been impaired. Antibiotic resistance is a public health problem, responsible for increases in mortality and extended stays at hospitals. Hospitals and other clinical settings have implemented [...]

Scaling up and down: movement ecology for microorganisms

Nathan I. Wisnoski, Jay T. Lennon

Published: 2022-06-19
Subjects: Ecology and Evolutionary Biology, Life Sciences, Microbiology

Movement is critical for the fitness of organisms, both large and small. It dictates how individuals acquire resources, evade predators, exchange genetic material, and respond to stressful environments. Movement also influences ecological and evolutionary dynamics at scales beyond the individual organism. However, the links between individual motility and the processes that generate and maintain [...]

A minimum data standard for vector competence experiments

Velen Yifei Wu, Binqi Chen, Rebecca Christofferson, et al.

Published: 2022-06-14
Subjects: Bioinformatics, Entomology, Life Sciences, Microbiology, Virology

The growing threat of vector-borne diseases, highlighted by recent epidemics, has prompted increased focus on the fundamental biology of vector-virus interactions. To this end, experiments are often the most reliable way to measure vector competence (the potential for arthropod vectors to transmit certain pathogens). Data from these experiments are critical to understand outbreak risk, but – [...]

Gut microbiota repeatability is contingent on temporal scale and age in wild meerkats

Alice Risely, Dominik W. Schmid, Nadine Mueller-Klein, et al.

Published: 2022-03-29
Subjects: Life Sciences, Microbiology, Other Microbiology

Inter-individual differences in gut microbiota composition are hypothesized to generate variation in host fitness – a premise for the evolution of host-gut microbe symbioses. However, recent evidence suggests that gut microbial communities are highly dynamic, challenging the notion that individuals harbour unique and stable gut microbial phenotypes. Leveraging a long-term dataset of wild [...]

The Global Forest Health Crisis: A Public Good Social Dilemma in Need of International Collective Action

Geoffrey Williams, Matthew D. Ginzel, Zhao Ma, et al.

Published: 2022-03-10
Subjects: Agricultural and Resource Economics, Agricultural Economics, Agricultural Science, Agriculture, Behavioral Economics, Biodiversity, Biology, Biosecurity, Botany, Economics, Entomology, Environmental Microbiology and Microbial Ecology Life Sciences, Environmental Studies, Forest Biology, Forest Management, Forest Sciences, International Relations, Life Sciences, Microbiology, Other Forestry and Forest Sciences, Other Plant Sciences, Pathogenic Microbiology, Plant Biology, Plant Pathology, Plant Sciences, Political Science, Science and Technology Studies, Social and Behavioral Sciences

Society is confronted by interconnected threats to ecological sustainability. Among these is the devastation of forests by destructive non-native pathogens and insects introduced through global trade, leading to the loss of critical ecosystem services and a global forest health crisis. We argue that the forest health crisis is a public good social dilemma and propose a response framework that [...]

New insight into colonies of Microcystis (Cyanobacteria) as multi-specific floating biofilms

Claudia Piccini, Angel M Segura, Gabriela Martínez de la Escalera, et al.

Published: 2022-01-29
Subjects: Ecology and Evolutionary Biology, Environmental Microbiology and Microbial Ecology Life Sciences, Life Sciences, Microbiology

The ability to form biofilms is a functional trait shared by many bacterial species. Biofilms provide bacteria a sheltered environment where the nutrients and oxygen gradients create a heterogeneous matrix and promote cells to differentiate their metabolism and functions according to the position they occupy inside the matrix. Species of the Microcystis genus are among the most common [...]

Source and seasonality of epizootic mycoplasmosis in free-ranging pronghorn (Antilocapra americana)

Marguerite Johnson, Christopher MacGlover, Erika Peckham, et al.

Published: 2021-12-21
Subjects: Ecology and Evolutionary Biology, Life Sciences, Medicine and Health Sciences, Microbiology, Other Ecology and Evolutionary Biology, Pathogenic Microbiology, Veterinary Infectious Diseases, Veterinary Medicine

Mycoplasma bovis is an economically important bacterial pathogen of cattle and bison that most commonly causes pneumonia, polyarthritis and mastitis. M. bovis is prevalent in cattle and commercial bison; however, infections in other species are rare. In early 2019, we identified M. bovis in free-ranging pronghorn (Antilocapra americana) in northeastern Wyoming, USA. Here we report on additional [...]

Selfish, promiscuous, and sometimes useful: how mobile genetic elements drive horizontal gene transfer in microbial populations

Eduardo P. C. Rocha, Matthieu Haudiquet, Jorge Moura de Sousa, et al.

Published: 2021-12-04
Subjects: Ecology and Evolutionary Biology, Evolution, Genetics and Genomics, Genomics, Life Sciences, Microbiology, Other Microbiology

Horizontal gene transfer (HGT) drives microbial adaptation but is often under the control of mobile genetic elements (MGEs) whose interests are not necessarily aligned with those of their hosts. In general, transfer is costly to the donor cell while potentially beneficial to the recipients. The diversity and plasticity of cell-MGEs interactions, and those among MGEs, results in complex [...]

Microbiotic particles in water and soil, water-soil microbiota coalescences, and antimicrobial resistance

Fernando Baquero, Teresa M. Coque, Natalia Guerra-Pinto, et al.

Published: 2021-11-30
Subjects: Ecology and Evolutionary Biology, Environmental Microbiology and Microbial Ecology Life Sciences, Life Sciences, Marine Biology, Microbiology

Bacterial organisms like surfaces. Water and soil contain a multiplicity of particulated material where bacterial populations and communities might attach. Microbiotic particles refers to any type of small particles (less than 2 mm) where bacteria (and other microbes) might attach, resulting in medium- long-term colonization. In this work, the interactions of bacterial organisms with microbiotic [...]

Impact of heat stress on the fitness outcomes of symbiotic infection in aphids: a meta-analysis

Kévin Tougeron, Corentin Iltis

Published: 2021-11-24
Subjects: Ecology and Evolutionary Biology, Entomology, Environmental Microbiology and Microbial Ecology Life Sciences, Evolution, Life Sciences, Microbiology, Other Ecology and Evolutionary Biology, Other Microbiology

Beneficial microorganisms shape the evolutionary trajectories of their hosts, facilitating or constraining the colonization of new ecological niches. One convincing example entails the responses of insect-microbe associations to rising temperatures. Indeed, the insect resilience to stressful high temperatures depends on the genetic identity of the obligate symbiont and the presence of heat [...]

Many defense systems in microbial genomes, but which is defending whom from what?

Eduardo P. C. Rocha, David Bikard

Published: 2021-09-18
Subjects: Ecology and Evolutionary Biology, Evolution, Genetics and Genomics, Life Sciences, Microbiology, Other Microbiology

Prokaryotes have numerous mobile genetic elements (MGE) that mediate horizontal gene transfer between cells. These elements can be costly, even deadly, and cells use numerous defense systems to filter, control or inactivate them. Surprisingly, many phages, conjugative plasmids, and their parasites, phage satellites or mobilizable plasmids, encode defense systems homologous to those of bacteria. [...]

Glucocorticoids coordinate changes in gut microbiome composition in wild North American red squirrels

Lauren Petrullo, Tiantian Ren, Martin Wu, et al.

Published: 2021-09-16
Subjects: Biology, Ecology and Evolutionary Biology, Life Sciences, Microbiology

Gut microbiome diversity plays an important role in host health and fitness, in part through the diversification of gut metabolic function and pathogen protection. Elevations in glucocorticoids (GCs) appear to reduce gut microbiome diversity in experimental studies, suggesting that a loss of microbial diversity may be a negative consequence of increased GCs. However, given that ecological factors [...]

Allogenous Selection of Mutational Collateral Resistance: Old Drugs Select for New Resistances Within Antibiotic Families

Fernando Baquero, Jose-Luis martínez, Angela Silva-Novais, et al.

Published: 2021-09-11
Subjects: Life Sciences, Medicine and Health Sciences, Microbiology

Allogeneous selection occurs when an antibiotic selects for resistance to more advanced members of the same family. The mechanisms of allogenous selection are (a) collateral expansion, when the antibiotic expands the gene and gene-containing bacterial populations favoring the emergence of other mutations, inactivating the more advanced antibiotics; (b) collateral selection, when the old [...]

Plant herbivore protection by arbuscular mycorrhizas: A role for fungal diversity?

Adam Frew, Pedro Madeira Antunes, Duncan D Cameron, et al.

Published: 2021-07-03
Subjects: Biodiversity, Ecology and Evolutionary Biology, Environmental Microbiology and Microbial Ecology Life Sciences, Life Sciences, Microbiology, Plant Biology, Plant Sciences

The symbiotic association between arbuscular mycorrhizal (AM) fungi and terrestrial plants can enhance plant defences against insect herbivores. Despite advances in our understanding of how AM fungi affect plant tolerance and resistance based defence mechanisms, we contend that the role of fungal diversity in these interactions continues to be largely overlooked. This is problematic considering [...]

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