abstract：:Replication forks must respond to changes in nutrient conditions, especially in bacterial cells. By investigating the single-molecule dynamics of replicative helicase DnaC, DNA primase DnaG, and lagging-strand polymerase DnaE in the model bacterium Bacillus subtilis, we show that proteins react differently to stress c...

journal_title：mSphere

authors： Hernández-Tamayo R,Schmitz H,Graumann PL

更新日期：2021-01-27 00:00:00

abstract：:Pascale Guiton works in the field of parasitology at a primarily undergraduate institution. In this mSphere of Influence article, she reflects on her difficulties as a faculty of color to discuss socioscientific issues in her classrooms. T. D. Sadler's article "Situating socio-scientific issues in classrooms as a mean...

journal_title：mSphere

authors： Guiton PS

更新日期：2021-01-20 00:00:00

abstract：:Information on severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spread in Africa is limited by insufficient diagnostic capacity. Here, we assessed the coronavirus disease (COVID-19)-related diagnostic workload during the onset of the pandemic in the central laboratory of Benin, Western Africa; characterize...

journal_title：mSphere

authors： Sander AL,Yadouleton A,Moreira-Soto A,Tchibozo C,Hounkanrin G,Badou Y,Fischer C,Krause N,Akogbeto P,F de Oliveira Filho E,Dossou A,Brünink S,Drosten C,Aïssi MAJ,Harouna Djingarey M,Hounkpatin B,Nagel M,Drexler JF

更新日期：2021-01-13 00:00:00

abstract：:Trichomonas vaginalis is the causative agent of trichomoniasis, the most prevalent nonviral sexually transmitted infection worldwide. Repetitive elements, including transposable elements (TEs) and virally derived repeats, comprise more than half of the ∼160-Mb T. vaginalis genome. An intriguing question is how the par...

journal_title：mSphere

authors： Warring SD,Blow F,Avecilla G,Orosco JC,Sullivan SA,Carlton JM

更新日期：2021-01-06 00:00:00

abstract：:Père David's deer (Elaphurus davidianus or milu) is an endangered species, and the prevalence of antimicrobial resistance (AMR) such as mcr-1-positive strains among them has been unknown. In this study, we aimed to investigate the genomic characterizations of mcr-1-positive strains and provide insight into the dissemi...

journal_title：mSphere

authors： Lu X,Xiao X,Liu Y,Huang S,Li R,Wang Z

更新日期：2020-12-23 00:00:00

abstract：:Antibiotic resistance has become a major public health concern as bacteria evolve to evade drugs, leading to recurring infections and a decrease in antibiotic efficacy. Systematic efforts have revealed mechanisms involved in resistance. Yet, in many cases, how these specific mechanisms accelerate or slow the evolution...

journal_title：mSphere

authors： Langevin AM,El Meouche I,Dunlop MJ

更新日期：2020-12-16 00:00:00

abstract：:Clostridioides difficile is an obligately anaerobic, spore-forming, Gram-positive pathogenic bacterium that is considered the leading cause of nosocomial diarrhea worldwide. Recent studies have attempted to understand the biology of the outermost layer of C. difficile spores, the exosporium, which is believed to contr...

journal_title：mSphere

authors： Romero-Rodríguez A,Troncoso-Cotal S,Guerrero-Araya E,Paredes-Sabja D

更新日期：2020-11-18 00:00:00

abstract：:Continued influx of metagenome-derived proteins with misannotated taxonomy into conventional databases, including RefSeq, threatens to eliminate the value of taxonomy identifiers. To prevent this, urgent efforts should be undertaken by submitters of metagenomic data sets as well as by database managers. ...

journal_title：mSphere

authors： Arkhipova IR

更新日期：2020-11-04 00:00:00

abstract：:Many microbiologists exhibit a fascination with unculturable bacteria. This intrigue can be expressed through curiosity about nutrient needs, as well as about parameters such as optimal temperature, oxygen levels, minimum and optimal light, or other such environmental factors. Microbiologists study organisms' genetic ...

journal_title：mSphere

authors： Montgomery BL

更新日期：2020-10-28 00:00:00

abstract：:The gut microbiota has a key role in determining susceptibility to Clostridioides difficile infections (CDIs). However, much of the mechanistic work examining CDIs in mouse models uses animals obtained from a single source. We treated mice from 6 sources (2 University of Michigan colonies and 4 commercial vendors) wit...

journal_title：mSphere

authors： Tomkovich S,Stough JMA,Bishop L,Schloss PD

更新日期：2020-10-21 00:00:00

abstract：:Bacterial small RNAs play a remarkable role in the regulation of functions involved in host-pathogen interaction. ErsA is a small RNA of Pseudomonas aeruginosa that contributes to the regulation of bacterial virulence traits such as biofilm formation and motility. Shown to take part in a regulatory circuit under the c...

journal_title：mSphere

authors： Ferrara S,Rossi A,Ranucci S,De Fino I,Bragonzi A,Cigana C,Bertoni G

更新日期：2020-10-14 00:00:00

abstract：:This study was carried out to evaluate hypotheses generated by fundamental cause theory regarding the socioeconomic status (SES) gradient in colonization with Staphylococcus aureus among Hispanic and non-Hispanic adults living in a border community. Participants (n = 613) recruited in naturally occurring small groups ...

journal_title：mSphere

authors： Barger SD,Lininger MR,Trotter RT 2nd,Wayment HA,Mbegbu M,Kyman S,Pearson T

更新日期：2020-09-30 00:00:00

abstract：:Candida albicans, a pervasive opportunistic pathogen, undergoes a unique phenotypic transition from a "white" phenotype to an "opaque" phenotype. The switch to opaque impacts gene expression, cell morphology, wall structure, metabolism, biofilm formation, mating, virulence, and colonization of the skin and gastrointes...

journal_title：mSphere

authors： Park YN,Pujol C,Wessels DJ,Soll DR

更新日期：2020-09-23 00:00:00

abstract：:As severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) continues to spread around the world, there is an urgent need for new assay formats to characterize the humoral response to infection. Here, we present an efficient, competitive serological assay that can simultaneously determine an individual's seroreact...

journal_title：mSphere

authors： Byrnes JR,Zhou XX,Lui I,Elledge SK,Glasgow JE,Lim SA,Loudermilk RP,Chiu CY,Wang TT,Wilson MR,Leung KK,Wells JA

更新日期：2020-09-16 00:00:00

abstract：:The major surface lipophosphoglycan (LPG) of Leishmania parasites is critical to vector competence in restrictive sand fly vectors in mediating Leishmania attachment to the midgut epithelium, considered essential to parasite survival and development. However, the relevance of LPG for sand flies that harbor multiple sp...

journal_title：mSphere

authors： Coutinho-Abreu IV,Oristian J,de Castro W,Wilson TR,Meneses C,Soares RP,Borges VM,Descoteaux A,Kamhawi S,Valenzuela JG

更新日期：2020-09-09 00:00:00

abstract：:Most of our knowledge relating to molecular mechanisms of human fungal pathogenesis in Candida albicans relies on reverse genetics approaches, requiring strain engineering. DNA-mediated transformation of C. albicans has been described as highly mutagenic, potentially accentuated by the organism's genome plasticity, in...

journal_title：mSphere

authors： Marton T,Maufrais C,d'Enfert C,Legrand M

更新日期：2020-09-02 00:00:00

abstract：:Disruption of the histone-like nucleoid structuring protein (H-NS) was shown to affect the ability of Gram-negative bacteria to regulate genes associated with virulence, persistence, stress response, quorum sensing, biosynthesis pathways, and cell adhesion. Here, we used the expression of metallo-β-lactamases (MBLs), ...

journal_title：mSphere

authors： Huang F,Fitchett N,Razo-Gutierrez C,Le C,Martinez J,Ra G,Lopez C,Gonzalez LJ,Sieira R,Vila AJ,Bonomo RA,Ramirez MS

更新日期：2020-08-26 00:00:00

abstract：:Feedback mechanisms are fundamental to the control of physiological responses. One important example in gene regulation, termed negative autoregulation (NAR), occurs when a transcription factor (TF) inhibits its own production through transcriptional repression. This enables more-rapid homeostatic control of gene expr...

journal_title：mSphere

authors： Kozuch BC,Shaffer MG,Culyba MJ

更新日期：2020-08-19 00:00:00

abstract：:Many coronavirus disease 2019 (COVID-19) patients demonstrate lethal respiratory complications caused by cytokine release syndrome (CRS). Multiple cytokines have been implicated in CRS, but levels of tumor necrosis factor superfamily 14 (TNFSF14) (LIGHT) have not been previously measured in this setting. In this study...

journal_title：mSphere

authors： Perlin DS,Zafir-Lavie I,Roadcap L,Raines S,Ware CF,Neil GA

更新日期：2020-08-12 00:00:00

abstract：:Extracellular vesicles (EVs) are membranous compartments produced by yeast and mycelial forms of several fungal species. One of the difficulties in perceiving the role of EVs during the fungal life, and particularly in cell wall biogenesis, is caused by the presence of a thick cell wall. One alternative to have better...

journal_title：mSphere

authors： Rizzo J,Chaze T,Miranda K,Roberson RW,Gorgette O,Nimrichter L,Matondo M,Latgé JP,Beauvais A,Rodrigues ML

更新日期：2020-08-12 00:00:00

abstract：:The newly emerged Candida species Candida auris is associated with an exponential rise in life-threatening invasive disease in health care facilities worldwide. Unlike other species, C. auris exhibits a high level of transmissibility, multidrug resistance, and persistence in the environment, yet little is known about ...

journal_title：mSphere

authors： Vila T,Montelongo-Jauregui D,Ahmed H,Puthran T,Sultan AS,Jabra-Rizk MA

更新日期：2020-08-05 00:00:00

abstract：:Streptococcus pneumoniae (the pneumococcus) carriage is commonly used to measure effects of pneumococcal vaccines. Based on findings from culture-based studies, the World Health Organization recommends both nasopharyngeal (NP) and oropharyngeal (OP) sampling for detecting adult carriage. Given evidence of potential co...

journal_title：mSphere

authors： Boelsen LK,Dunne EM,Gould KA,Ratu FT,Vidal JE,Russell FM,Mulholland EK,Hinds J,Satzke C

更新日期：2020-07-29 00:00:00

abstract：:The Enterobacterales order of Gram-negative bacteria includes the common nosocomial pathogens Klebsiella pneumoniae, Escherichia coli, Serratia marcescens, and Enterobacter species. Intestinal domination by some colonizing bacterial taxa is associated with subsequent infection, but 16S rRNA gene sequencing is too cost...

journal_title：mSphere

authors： Rao K,Seekatz A,Bassis C,Sun Y,Mantlo E,Bachman MA

更新日期：2020-07-22 00:00:00

abstract：:Increased knowledge about the role of horizontal gene transfer is key to improve our understanding of the spread of antimicrobial resistance (AMR) in human populations. We therefore studied the dissemination of the blaCTX-M-15 extended-spectrum-β-lactamase (ESBL) gene in Klebsiella pneumoniae isolates obtained from st...

journal_title：mSphere

authors： Pedersen T,Tellevik MG,Kommedal Ø,Lindemann PC,Moyo SJ,Janice J,Blomberg B,Samuelsen Ø,Langeland N

更新日期：2020-07-15 00:00:00

abstract：:Immunity to Toxoplasma gondii at early stages of infection in C57BL/6 mice depends on gamma interferon (IFN-γ) production by NK cells, while at later stages it is primarily mediated by CD8 T cells. We decided to explore the requirement for CD4 T cells during T. gondii infection in Batf3-/- mice, which lack CD8α+ dendr...

journal_title：mSphere

authors： Tussiwand R,Behnke MS,Kretzer NM,Grajales-Reyes GE,Murphy TL,Schreiber RD,Murphy KM,Sibley LD

更新日期：2020-07-15 00:00:00

abstract：:Nipah disease is listed as one of the WHO priority diseases that pose the greatest public health risk due to their epidemic potential. More than 200 experts from around the world convened in Singapore last year to mark the 20th anniversary of the first Nipah virus outbreaks in Malaysia and Singapore. Most of these exp...

journal_title：mSphere

authors： Gómez Román R,Wang LF,Lee B,Halpin K,de Wit E,Broder CC,Rahman M,Kristiansen P,Saville M

更新日期：2020-07-08 00:00:00

abstract：:Spores, the infectious agents of many Firmicutes, are remarkably resilient cell forms. Even distant relatives can have similar spore architectures although some display unique features; they all incorporate protective proteinaceous envelopes. We previously found that Bacillus spores can achieve these protective proper...

journal_title：mSphere

authors： Janganan TK,Mullin N,Dafis-Sagarmendi A,Brunt J,Tzokov SB,Stringer S,Moir A,Chaudhuri RR,Fagan RP,Hobbs JK,Bullough PA

更新日期：2020-07-01 00:00:00

abstract：:Manipulation of the host cell is a crucial part of life for many intracellular organisms. We have recently come to appreciate the extent to which the intracellular pathogen Toxoplasma gondii reprograms its host cell, and this is illustrated by the marked upregulation of the central regulator c-Myc, an oncogene that co...

journal_title：mSphere

authors： Panas MW,Boothroyd JC

更新日期：2020-06-24 00:00:00

abstract：:Using live microbes as therapeutic candidates is a strategy that has gained traction across multiple therapeutic areas. In the skin, commensal microorganisms play a crucial role in maintaining skin barrier function, homeostasis, and cutaneous immunity. Alterations of the homeostatic skin microbiome are associated with...

journal_title：mSphere

authors： Dodds D,Bose JL,Deng MD,Dubé GR,Grossman TH,Kaiser A,Kulkarni K,Leger R,Mootien-Boyd S,Munivar A,Oh J,Pestrak M,Rajpura K,Tikhonov AP,Turecek T,Whitfill T

更新日期：2020-06-10 00:00:00

abstract：:A maternal vaccine capable of boosting neutralizing antibody (NAb) responses directed against circulating viruses in HIV-infected pregnant women could effectively decrease mother-to-child transmission of HIV. However, it is not known if an HIV envelope (Env) vaccine administered to infected pregnant women could enhanc...

journal_title：mSphere

authors： Hompe ED,Mangold JF,Kumar A,Eudailey JA,McGuire E,Haynes BF,Moody MA,Wright PF,Fouda GG,Giorgi EE,Gao F,Permar SR

更新日期：2020-06-03 00:00:00

abstract：:Syndiniales are a ubiquitous group of protist parasites that infect and kill a wide range of hosts, including harmful bloom-forming dinoflagellates. Despite the importance of parasitism as an agent of plankton mortality, parasite-host dynamics remain poorly understood, especially over time, hindering the inclusion of ...

journal_title：mSphere

authors： Anderson SR,Harvey EL

更新日期：2020-05-27 00:00:00

abstract：:The Anabaena organismic unit is a filament of communicating cells. Under conditions of nitrogen scarcity, some cells along the filament differentiate into heterocysts, which are specialized in the fixation of atmospheric N2 and provide the vegetative cells with N2 fixation products. At a certain stage, the differentia...

journal_title：mSphere

authors： Valladares A,Velázquez-Suárez C,Herrero A

更新日期：2020-05-20 00:00:00

abstract：:Type I interferons (IFN) initiate an antiviral state through a signal transduction cascade that leads to the induction of hundreds of IFN-stimulated genes (ISGs) to restrict viral infection. Recently, RNA modifications on both host and viral RNAs have been described as regulators of infection. However, the impact of h...

journal_title：mSphere

authors： Williams GD,Gokhale NS,Snider DL,Horner SM

更新日期：2020-05-13 00:00:00

abstract：:Members of family Coronaviridae cause a variety of diseases in birds and mammals. Porcine hemagglutinating encephalomyelitis virus (PHEV), a lesser-researched coronavirus, can infect naive pigs of any age, but clinical disease is observed in pigs ≤4 weeks of age. No commercial PHEV vaccines are available, and neonatal...

journal_title：mSphere

authors： Mora-Díaz JC,Magtoto R,Houston E,Baum D,Carrillo-Ávila JA,Temeeyasen G,Zimmerman J,Piñeyro P,Giménez-Lirola L

更新日期：2020-05-06 00:00:00

abstract：:Escherichia coli populations undergo repeated replacement of parental genotypes with fitter variants deep in stationary phase. We isolated one such variant, which emerged after 3 weeks of maintaining an E. coli K-12 population in stationary phase. This variant displayed a small colony phenotype and slow growth and was...

journal_title：mSphere

authors： Nandy P,Chib S,Seshasayee A

更新日期：2020-04-15 00:00:00

abstract：:Mary Lopez-Perez works on immunology and pathogenesis of malaria. In this mSphere of Influence article, she reflects on how the paper "Functional antibodies against VAR2CSA in nonpregnant populations from Colombia exposed to Plasmodium falciparum and Plasmodium vivax" by S. Gnidehou, J. Doritchamou, E. M. Arango, A. C...

journal_title：mSphere

authors： Lopez-Perez M

更新日期：2020-04-08 00:00:00

abstract：:We are exposed daily to many glycans from bacteria and food plants. Bacterial glycans are generally antigenic and elicit antibody responses. It is unclear if food glycans' sharing of antigens with bacterial glycans influences our immune responses to bacteria. We studied 14 different plant foods for cross-reactivity wi...

journal_title：mSphere

authors： Nahm MH,Yu J,Vlach J,Bar-Peled M

更新日期：2020-04-08 00:00:00

abstract：:Treponema pallidum subsp. pallidum is the causative agent of syphilis, a human-specific sexually transmitted infection that causes a multistage disease with diverse clinical manifestations. Treponema pallidum undergoes rapid vascular dissemination to penetrate tissue, placental, and blood-brain barriers and gain acces...

journal_title：mSphere

authors： Lithgow KV,Church B,Gomez A,Tsao E,Houston S,Swayne LA,Cameron CE

更新日期：2020-04-01 00:00:00

abstract：:The etiology of bacterial meningitis in Turkey changed after the implementation of conjugated vaccines against Streptococcus pneumoniae and Haemophilus influenzae type b (Hib) in the Turkish National Immunization Program (NIP). Administration of Hib vaccine and PCV-7 (7-valent pneumococcal conjugate vaccine) was imple...

journal_title：mSphere

authors： Ceyhan M,Ozsurekci Y,Tanır Basaranoglu S,Gurler N,Sali E,Keser Emiroglu M,Oz FN,Belet N,Duman M,Ulusoy E,Kurugol Z,Tezer H,Ozkaya Parlakay A,Dinleyici EC,Celik U,Celebi S,Oner AF,Solmaz MA,Karbuz A,Hatipoglu N,Dev

更新日期：2020-03-25 00:00:00

abstract：:Globally, more antimicrobials are used in food-producing animals than in humans, and the extensive use of medically important human antimicrobials poses a significant public health threat in the face of rising antimicrobial resistance (AMR). The development of novel ionophores, a class of antimicrobials used exclusive...

journal_title：mSphere

authors： Harbison-Price N,Ferguson SA,Heikal A,Taiaroa G,Hards K,Nakatani Y,Rennison D,Brimble MA,El-Deeb IM,Bohlmann L,McDevitt CA,von Itzstein M,Walker MJ,Cook GM

更新日期：2020-03-18 00:00:00