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1.
J Pediatr Nurs ; 79: 234-240, 2024 Sep 19.
Artigo em Inglês | MEDLINE | ID: mdl-39305729

RESUMO

PURPOSE: Elevated rates of 30-day readmission for children with epilepsy were noted at a stand-alone pediatric acute care facility. To address this issue, a standardized pathway was created and implemented in 2017. The main objective was to ensure that patients with epilepsy and their families were adequately prepared for discharge and the transition to home. DESIGN AND METHODS: Using a quality improvement (QI) approach, a standardized education pathway was developed and implemented to decrease unplanned 30-day readmissions of patients with a diagnosis of epilepsy from a specialized neurology unit. An interprofessional care team received training to ensure standardized communication around the pathway approach and components. All patients with a diagnosis of epilepsy and their families were educated using the pathway and guided through additional simulation and teach-back exercises. RESULTS: Analysis demonstrated a 27.6 % decrease in unplanned 30-day readmissions in the 6 years following implementation. An estimated $950,000 in cost savings was achieved secondary to program implementation. CONCLUSIONS: Utilizing the pathway standardizes epilepsy management education and decreases unplanned 30-day readmissions for pediatric patients diagnosed with epilepsy. A standardized educational plan is an essential component of patient discharge teaching and proper home management of epilepsy. PRACTICE IMPLICATIONS: For sustainability, education needs to be continuously refreshed and included in onboarding new nurses. To ensure health equity, translation of the pathway into multiple languages is needed.

2.
Aust Crit Care ; 36(4): 470-476, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-36096922

RESUMO

BACKGROUND: The provision of early mobilisation to critically ill patients has the potential to improve long term outcomes, but, is complex to deliver. There is minimal literature detailing the training and expertise required to deliver these interventions safely and effectively. OBJECTIVE: The objective of this study was to determine the key elements of a performance standard for assessment of physiotherapists delivering exercise and mobilisation interventions to the critically ill. METHOD: This is a modified eDelphi expert consensus study. Fifty-one physiotherapists from Australia and New Zealand with relevant clinical, educational, or research experience were included on the expert panel. Background information and the initial pool of items were developed from review of relevant literature. Five survey rounds were administered across two study phases to determine the elements, performance criteria, and assessment scale of the performance standard. Items were modified, amalgamated, and added based upon panel comments. RESULTS: Consensus was achieved for 69 mandatory, and two supplementary performance criteria which were arranged under 15 elements encompassing knowledge, assessment, analysis, intervention, and professional behaviours. A 3-point rating scale was selected to assess item achievement and global performance. CONCLUSION: Binational expert consensus was reached to define the assessment criteria for physiotherapists delivering exercise and mobilisation interventions to the critically ill. This standard can be utilised in clinical, educational, and research practice environments to guide training, assessment, and skill recognition in critical care physiotherapy.


Assuntos
Estado Terminal , Fisioterapeutas , Humanos , Técnica Delphi , Modalidades de Fisioterapia , Cuidados Críticos
3.
Aust Crit Care ; 36(5): 702-707, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-36517331

RESUMO

BACKGROUND: Activin A is a potent negative regulator of muscle mass elevated in critical illness. It is unclear whether muscle strength and physical function in critically ill humans are associated with elevated activin A levels. OBJECTIVES: The objective of this study was to investigate the relationship between serum activin A levels, muscle strength, and physical function at discharge from the intensive care unit (ICU) and hospital. METHODS: Thirty-six participants were recruited from two tertiary ICUs in Melbourne, Australia. Participants were included if they were mechanically ventilated for >48 h and expected to have a total ICU stay of >5 days. The primary outcome measure was the Six-Minute Walk Test distance at hospital discharge. Secondary outcome measures included handgrip strength, Medical Research Council Sum Score, Physical Function ICU Test Scored, Six-Minute Walk Test, and Timed Up and Go Test assessed throughout the hospital admission. Total serum activin A levels were measured daily in the ICU. RESULTS: High peak activin A was associated with worse Six-Minute Walk Test distance at hospital discharge (linear regression coefficient, 95% confidence interval, p-value: -91.3, -154.2 to -28.4, p = 0.007, respectively). Peak activin A concentration was not associated with the secondary outcome measures. CONCLUSIONS: Higher peak activin A may be associated with the functional decline of critically ill patients. Further research is indicated to examine its potential as a therapeutic target and a prospective predictor for muscle wasting in critical illness. STUDY REGISTRATION: ACTRN12615000047594.


Assuntos
Estado Terminal , Força da Mão , Humanos , Debilidade Muscular , Equilíbrio Postural , Estudos de Tempo e Movimento , Unidades de Terapia Intensiva
4.
Crit Care Med ; 50(3): 375-388, 2022 03 01.
Artigo em Inglês | MEDLINE | ID: mdl-34406169

RESUMO

OBJECTIVES: Significant variability exists in physical rehabilitation modalities and dosage used in the ICU. Our objective was to investigate the effect of physical rehabilitation in ICU on patient outcomes, the impact of task-specific training, and the dose-response profile. DATA SOURCES: A systematic search of Ovid MEDLINE, Cochrane Library, EMBASE, and CINAHL plus databases was undertaken on the May 28, 2020. STUDY SELECTION: Randomized controlled trials and controlled clinical trials investigating physical rehabilitation commencing in the ICU in adults were included. Outcomes included muscle strength, physical function, duration of mechanical ventilation, ICU and hospital length of stay, mortality, and health-related quality of life. Two independent reviewers assessed titles, abstracts, and full texts against eligibility criteria. DATA EXTRACTION: Details on intervention for all groups were extracted using the template for intervention description and replication checklist. DATA SYNTHESIS: Sixty trials were included, with a total of 5,352 participants. Random-effects pooled analysis showed that physical rehabilitation improved physical function at hospital discharge (standardized mean difference, 0.22; 95% CI, 0.00-0.44), reduced ICU length of stay by 0.8 days (mean difference, -0.80 d; 95% CI, -1.37 to -0.23 d), and hospital length of stay by 1.75 days (mean difference, -1.75 d; 95% CI, -3.03 to -0.48 d). Physical rehabilitation had no impact on the other outcomes. The intervention was more effective in trials where the control group received low-dose physical rehabilitation and in trials that investigated functional exercises. CONCLUSIONS: Physical rehabilitation in the ICU improves physical function and reduces ICU and hospital length of stay. However, it does not appear to impact other outcomes.


Assuntos
Estado Terminal/reabilitação , Unidades de Terapia Intensiva , Força Muscular , Modalidades de Fisioterapia/estatística & dados numéricos , Terapia por Exercício/estatística & dados numéricos , Humanos , Tempo de Internação/estatística & dados numéricos , Alta do Paciente/estatística & dados numéricos , Respiração Artificial/enfermagem
5.
BMC Public Health ; 21(1): 818, 2021 04 28.
Artigo em Inglês | MEDLINE | ID: mdl-33910558

RESUMO

BACKGROUND: COVID-19 has had a devastating impact and efforts are being made to speed up vaccinations. The growing problem of vaccine hesitancy may affect the uptake of COVID-19 vaccine. We examined the individual, communication and social determinants associated with vaccines uptake. METHODS: Data come from a nationwide online probability-based panel of 1012 representative adults in the United States and the survey was conducted before the vaccines were available. People under the federal poverty level and racial and ethnic minorities were oversampled. Our outcome variables of interest were likelihood of vaccinating self and likelihood of vaccinating people under one's care (such as children) measuring behavioral intentions. Independent variables included perceptions of risk, exposure to different media for COVID-19 news, political party identification, confidence in scientists and social determinants of health. Logistic regression analysis was used to ascertain the effects of independent variables on the two outcome variables. RESULTS: The results indicated that 68 and 65% agreed to get the vaccine for themselves and people under their care, respectively. Risk perceptions (severity of and susceptibility to COVID-19) were significantly associated with vaccine uptake. People who relied on "conservative" news outlets, Republicans, and who had low confidence in scientists are least likely to vaccinate self or children. Non-Hispanic Blacks and those with least schooling were also less likely to receive vaccine for themselves or people in their care. CONCLUSIONS: Our study identified race/ethnicity, risk perceptions, exposure to different media for COVID-19 news, party identification and confidence in scientists as factors that would be affecting COVID-19 vaccine uptake. The good news is that these are addressable through strategic public health communications, but a lot of work remains to be done with some urgency.


Assuntos
Vacinas contra COVID-19 , COVID-19 , Adulto , Criança , Humanos , SARS-CoV-2 , Determinantes Sociais da Saúde , Estados Unidos , Vacinação
6.
Crit Care Med ; 48(11): e1121-e1128, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-32947470

RESUMO

OBJECTIVES: To evaluate the methodological quality and thematic completeness of existing clinical practice guidelines, addressing early mobilization of adults in the ICU. DATA SOURCES: Systematic review of Medline, Embase, CINAHL, Cochrane, and grey literature from January 2008 to February 2020. STUDY SELECTION: Two reviewers independently screened titles and abstracts and then full texts for eligibility. Ten publications were included. DATA EXTRACTION: A single reviewer extracted data from the included publications and a second reviewer completed cross-checking. Qualitative data were extracted in five categories relating to the key factors influencing delivery of early mobilization to critically ill patients. DATA SYNTHESIS: Methodological quality was appraised using the Appraisal of Guidelines for Research and Evaluation II tool. Appraisal of Guidelines for Research and Evaluation II scores for applicability were low. Median quality scores for editorial independence, rigor of development, and stakeholder engagement were also poor. Narrative synthesis of publication content was undertaken. All publications supported implementation of early mobilization. Most documents agreed upon seven topics: 1) early mobilization is safe and may reduce healthcare costs, 2) safety criteria should be provided, 3) a protocolized or structured approach should be used, 4) collaborative teamwork is required, 5) staff require specific skills or experience, 6) patient and family engagement is important, and 7) program evaluation and outcome measurement are a key component of implementation. There was no consensus on dosage and patient selection. The areas of team culture and leadership were poorly addressed. CONCLUSIONS: Despite significant variation in the methodological quality of clinical practice guidelines for early mobilization, there were important consistencies in recommendations internationally. Future research should address gaps related to patient selection, dosage, team culture, and expertise. Future clinical practice guidelines in this area should focus on engagement of patients and families in the development process and provision of resources to support implementation based on the consideration of known barriers and facilitators.


Assuntos
Deambulação Precoce/normas , Unidades de Terapia Intensiva/normas , Humanos , Guias de Prática Clínica como Assunto
7.
Appl Environ Microbiol ; 83(12)2017 06 15.
Artigo em Inglês | MEDLINE | ID: mdl-28411219

RESUMO

Plant-associated microorganisms are essential for their hosts' survival and performance. Yet, most plant microbiome studies to date have focused on terrestrial species sampled across relatively small spatial scales. Here, we report the results of a global-scale analysis of microbial communities associated with leaf and root surfaces of the marine eelgrass Zostera marina throughout its range in the Northern Hemisphere. By contrasting host microbiomes with those of surrounding seawater and sediment, we uncovered the structure, composition, and variability of microbial communities associated with eelgrass. We also investigated hypotheses about the assembly of the eelgrass microbiome using a metabolic modeling approach. Our results reveal leaf communities displaying high variability and spatial turnover that mirror their adjacent coastal seawater microbiomes. By contrast, roots showed relatively low compositional turnover and were distinct from surrounding sediment communities, a result driven by the enrichment of predicted sulfur-oxidizing bacterial taxa on root surfaces. Predictions from metabolic modeling of enriched taxa were consistent with a habitat-filtering community assembly mechanism whereby similarity in resource use drives taxonomic cooccurrence patterns on belowground, but not aboveground, host tissues. Our work provides evidence for a core eelgrass root microbiome with putative functional roles and highlights potentially disparate processes influencing microbial community assembly on different plant compartments.IMPORTANCE Plants depend critically on their associated microbiome, yet the structure of microbial communities found on marine plants remains poorly understood in comparison to that for terrestrial species. Seagrasses are the only flowering plants that live entirely in marine environments. The return of terrestrial seagrass ancestors to oceans is among the most extreme habitat shifts documented in plants, making them an ideal testbed for the study of microbial symbioses with plants that experience relatively harsh abiotic conditions. In this study, we report the results of a global sampling effort to extensively characterize the structure of microbial communities associated with the widespread seagrass species Zostera marina, or eelgrass, across its geographic range. Our results reveal major differences in the structure and composition of above- versus belowground microbial communities on eelgrass surfaces, as well as their relationships with the environment and host.


Assuntos
Bactérias/isolamento & purificação , Sedimentos Geológicos/microbiologia , Microbiota , Água do Mar/microbiologia , Zosteraceae/microbiologia , Bactérias/classificação , Bactérias/genética , Bactérias/metabolismo , Geografia , Filogenia , Folhas de Planta/microbiologia , Raízes de Plantas/microbiologia
8.
Clin Transplant ; 31(9)2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-28640438

RESUMO

More than three-fourths of adults in the USA use the Internet to access health-related information. Adults exploring the possibility of living donation should have access to online content that is readable and comprehensive. We simulated a search of online information about living kidney donation and evaluated readability, topics covered, and racial/ethnic diversity of 21 websites meeting inclusion criteria (eg, hosted by a nonprofit or patient advocacy organization, English content, based in USA). Using standard readability metrics, 62% of sites were classified as "Difficult to read" and none achieved the recommended reading level of sixth grade. On average, websites covered 18.5 (62%) of 30 recommended information topics (range: 7 to 28) and only 2.1 (23%) of 9 racial/ethnic diversity items (range: 0 to 6). Overall, the most common nonprofit or patient advocacy organization websites do not meet the readability standards established by the National Institutes of Health and the American Medical Association, many lack fundamental information about living kidney donation, and most are not racially/ethnically diverse. We encourage the transplant community to consider playing a more active role in improving the overall quality of online information disseminated to the general public. Further, there is a need to more critically examine the accuracy of online living donation content in future investigations.


Assuntos
Compreensão , Informática Aplicada à Saúde dos Consumidores/estatística & dados numéricos , Diversidade Cultural , Internet , Transplante de Rim , Doadores Vivos , Grupos Populacionais , Adulto , Humanos , Coleta de Tecidos e Órgãos , Estados Unidos
9.
BMC Genomics ; 15: 924, 2014 Oct 23.
Artigo em Inglês | MEDLINE | ID: mdl-25342549

RESUMO

BACKGROUND: Symbioses between chemoautotrophic bacteria and marine invertebrates are rare examples of living systems that are virtually independent of photosynthetic primary production. These associations have evolved multiple times in marine habitats, such as deep-sea hydrothermal vents and reducing sediments, characterized by steep gradients of oxygen and reduced chemicals. Due to difficulties associated with maintaining these symbioses in the laboratory and culturing the symbiotic bacteria, studies of chemosynthetic symbioses rely heavily on culture independent methods. The symbiosis between the coastal bivalve, Solemya velum, and its intracellular symbiont is a model for chemosynthetic symbioses given its accessibility in intertidal environments and the ability to maintain it under laboratory conditions. To better understand this symbiosis, the genome of the S. velum endosymbiont was sequenced. RESULTS: Relative to the genomes of obligate symbiotic bacteria, which commonly undergo erosion and reduction, the S. velum symbiont genome was large (2.7 Mb), GC-rich (51%), and contained a large number (78) of mobile genetic elements. Comparative genomics identified sets of genes specific to the chemosynthetic lifestyle and necessary to sustain the symbiosis. In addition, a number of inferred metabolic pathways and cellular processes, including heterotrophy, branched electron transport, and motility, suggested that besides the ability to function as an endosymbiont, the bacterium may have the capacity to live outside the host. CONCLUSIONS: The physiological dexterity indicated by the genome substantially improves our understanding of the genetic and metabolic capabilities of the S. velum symbiont and the breadth of niches the partners may inhabit during their lifecycle.


Assuntos
Bivalves/microbiologia , Ecossistema , Genoma Bacteriano , Espaço Intracelular/microbiologia , Simbiose , Animais , Composição de Bases/genética , Elementos de DNA Transponíveis/genética , Genes Bacterianos , Redes e Vias Metabólicas/genética , Dados de Sequência Molecular , Oxirredução , RNA de Transferência/genética
10.
PLoS Genet ; 7(9): e1002272, 2011 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-21966276

RESUMO

Drosophila melanogaster is emerging as an important model of non-pathogenic host-microbe interactions. The genetic and experimental tractability of Drosophila has led to significant gains in our understanding of animal-microbial symbiosis. However, the full implications of these results cannot be appreciated without the knowledge of the microbial communities associated with natural Drosophila populations. In particular, it is not clear whether laboratory cultures can serve as an accurate model of host-microbe interactions that occur in the wild, or those that have occurred over evolutionary time. To fill this gap, we characterized natural bacterial communities associated with 14 species of Drosophila and related genera collected from distant geographic locations. To represent the ecological diversity of Drosophilids, examined species included fruit-, flower-, mushroom-, and cactus-feeders. In parallel, wild host populations were compared to laboratory strains, and controlled experiments were performed to assess the importance of host species and diet in shaping bacterial microbiome composition. We find that Drosophilid flies have taxonomically restricted bacterial communities, with 85% of the natural bacterial microbiome composed of only four bacterial families. The dominant bacterial taxa are widespread and found in many different host species despite the taxonomic, ecological, and geographic diversity of their hosts. Both natural surveys and laboratory experiments indicate that host diet plays a major role in shaping the Drosophila bacterial microbiome. Despite this, the internal bacterial microbiome represents only a highly reduced subset of the external bacterial communities, suggesting that the host exercises some level of control over the bacteria that inhabit its digestive tract. Finally, we show that laboratory strains provide only a limited model of natural host-microbe interactions. Bacterial taxa used in experimental studies are rare or absent in wild Drosophila populations, while the most abundant associates of natural Drosophila populations are rare in the lab.


Assuntos
Bactérias/classificação , Biodiversidade , Drosophila/microbiologia , Simbiose , Animais , Bactérias/genética , Bactérias/isolamento & purificação , Evolução Biológica , Dieta , Drosophila/genética , Metagenoma , Modelos Biológicos , População , RNA Ribossômico 16S/genética
11.
Disabil Rehabil ; 44(8): 1221-1226, 2022 04.
Artigo em Inglês | MEDLINE | ID: mdl-32677854

RESUMO

PURPOSE: This study investigates whether short-term goal achievement in the early phase of neurological rehabilitation is an accurate indicator of discharge destination in patients with severe disability in comparison to change in scores in the motor domain of the Functional Independence Measure (FIM motor). METHOD: A prospective observational cohort study. PARTICIPANTS: A consecutive sample of 53 patients admitted to rehabilitation with a neurological diagnosis and FIM motor score below 47.Measures: Short-term goal achievement and FIM motor change in the first 2 weeks following admission and discharge destination. RESULTS: Short-term goal achievement showed good prognostic utility [area under the curve (AUC) of 0.75; 95% confidence intervals (CI) 0.6, 0.89] for discharge destination, dichotomized as home or semi-independent living versus nursing home care, similar to that demonstrated by change in FIM motor scores (AUC of 0.69; 95% CI 0.55, 0.84), p = 0.55. A cut-off was established for short-term goal achievement at more than half of goals achieved, with an AUC of 0.73 (95% CI 0.58, 0.87); sensitivity 71.4% and specificity 74.4%. CONCLUSIONS: Short-term goal achievement in the early phase post-admission is a good indicator of the person's potential to return home.Implications for RehabilitationShort-term goal setting should be a key practice feature of neurological rehabilitation.Goal achievement is an indicator of a person's potential to return home or to semi-independent living in people with severe neurological deficits.Evaluation of short-term goal achievement may inform the ongoing rehabilitation program and discharge planning.


Assuntos
Reabilitação Neurológica , Reabilitação do Acidente Vascular Cerebral , Atividades Cotidianas , Objetivos , Hospitalização , Humanos , Alta do Paciente , Estudos Prospectivos , Estudos Retrospectivos
12.
Microbiol Resour Announc ; 9(1)2020 Jan 02.
Artigo em Inglês | MEDLINE | ID: mdl-31896632

RESUMO

Here, we report results from PCR and sequencing of bacterial 16S rRNA genes from leaf and root surfaces from nine submerged aquatic vegetation (SAV) samples comprising five species. Samples were from four sites along the Potomac River.

13.
PeerJ ; 8: e9235, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32551196

RESUMO

BACKGROUND: Every human being carries with them a collection of microbes, a collection that is likely both unique to that person, but also dynamic as a result of significant flux with the surrounding environment. The interaction of the human microbiome (i.e., the microbes that are found directly in contact with a person in places such as the gut, mouth, and skin) and the microbiome of accessory objects (e.g., shoes, clothing, phones, jewelry) is of potential interest to both epidemiology and the developing field of microbial forensics. Therefore, the microbiome of personal accessories are of interest because they serve as both a microbial source and sink for an individual, they may provide information about the microbial exposure experienced by an individual, and they can be sampled non-invasively. FINDINGS: We report here a large-scale study of the microbiome found on cell phones and shoes. Cell phones serve as a potential source and sink for skin and oral microbiome, while shoes can act as sampling devices for microbial environmental experience. Using 16S rRNA gene sequencing, we characterized the microbiome of thousands of paired sets of cell phones and shoes from individuals at sporting events, museums, and other venues around the United States. CONCLUSIONS: We place this data in the context of previous studies and demonstrate that the microbiome of phones and shoes are different. This difference is driven largely by the presence of "environmental" taxa (taxa from groups that tend to be found in places like soil) on shoes and human-associated taxa (taxa from groups that are abundant in the human microbiome) on phones. This large dataset also contains many novel taxa, highlighting the fact that much of microbial diversity remains uncharacterized, even on commonplace objects.

14.
mSphere ; 4(1)2019 02 20.
Artigo em Inglês | MEDLINE | ID: mdl-30787117

RESUMO

Although aquaria are common features of homes and other buildings, little is known about how environmental perturbations (i.e., tank cleaning, water changes, addition of habitat features) impact the diversity and succession of aquarium microbial communities. In this study, we sought to evaluate the hypotheses that newly established aquaria show clear microbial successional patterns over time and that common marine aquarium-conditioning practices, such as the addition of ocean-derived "live rocks" (defined as any "dead coral skeleton covered with crustose coralline algae" transferred into an aquarium from open ocean habitats) impact the diversity of microbial populations as well as nitrogen cycling in aquaria. We collected water chemistry data alongside water and sediment samples from two independent and newly established saltwater aquaria over a 3-month period. Microbial communities in samples were assessed by DNA extraction, amplification of the 16S rRNA gene, and Illumina MiSeq sequencing. Our results showed clear and replicable patterns of community succession in both aquaria, with the existence of multiple stable states for aquarium microbial assemblages. Notably, our results show that changes in aquarium microbial communities do not always correlate with water chemistry measurements and that operational taxonomic unit (OTU)-level patterns relevant to nitrogen cycling were not reported as statistically significant. Overall, our results demonstrate that aquarium perturbations have a substantial impact on microbial community profiles of aquarium water and sediment and that the addition of live rocks improves nutrient cycling by shifting aquarium communities toward a more typical saltwater assemblage of microbial taxa.IMPORTANCE Saltwater aquaria are living systems that support a complex biological community of fish, invertebrates, and microbes. The health and maintenance of saltwater tanks are pressing concerns for home hobbyists, zoos, and professionals in the aquarium trade; however, we do not yet understand the underlying microbial species interactions and community dynamics which contribute to tank setup and conditioning. This report provides a detailed view of ecological succession and changes in microbial community assemblages in two saltwater aquaria which were sampled over a 3-month period, from initial tank setup and conditioning with "live rocks" through subsequent tank cleanings and water replacement. Our results showed that microbial succession appeared to be consistent and replicable across both aquaria. However, changes in microbial communities did not always correlate with water chemistry measurements, and aquarium microbial communities appear to have shifted among multiple stable states without any obvious buildup of undesirable nitrogen compounds in the tank environment.


Assuntos
Archaea/classificação , Bactérias/classificação , Ecossistema , Microbiota , Salinidade , Água/química , Compostos de Amônio/análise , Archaea/fisiologia , Código de Barras de DNA Taxonômico , DNA Arqueal , DNA Bacteriano/genética , Nitratos/análise , Nitritos/análise , Ciclo do Nitrogênio , Filogenia , RNA Ribossômico 16S/genética
17.
PeerJ ; 5: e3246, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28462046

RESUMO

BACKGROUND: Zostera marina (also known as eelgrass) is a foundation species in coastal and marine ecosystems worldwide and is a model for studies of seagrasses (a paraphyletic group in the order Alismatales) that include all the known fully submerged marine angiosperms. In recent years, there has been a growing appreciation of the potential importance of the microbial communities (i.e., microbiomes) associated with various plant species. Here we report a study of variation in Z. marina microbiomes from a field site in Bodega Bay, CA. METHODS: We characterized and then compared the microbial communities of root, leaf and sediment samples (using 16S ribosomal RNA gene PCR and sequencing) and associated environmental parameters from the inside, edge and outside of a single subtidal Z. marina patch. Multiple comparative approaches were used to examine associations between microbiome features (e.g., diversity, taxonomic composition) and environmental parameters and to compare sample types and sites. RESULTS: Microbial communities differed significantly between sample types (root, leaf and sediment) and in sediments from different sites (inside, edge, outside). Carbon:Nitrogen ratio and eelgrass density were both significantly correlated to sediment community composition. Enrichment of certain taxonomic groups in each sample type was detected and analyzed in regard to possible functional implications (especially regarding sulfur metabolism). DISCUSSION: Our results are mostly consistent with prior work on seagrass associated microbiomes with a few differences and additional findings. From a functional point of view, the most significant finding is that many of the taxa that differ significantly between sample types and sites are closely related to ones commonly associated with various aspects of sulfur and nitrogen metabolism. Though not a traditional model organism, we believe that Z. marina can become a model for studies of marine plant-microbiome interactions.

18.
PeerJ ; 5: e4029, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-29492330

RESUMO

BACKGROUND: Modern advances in sequencing technology have enabled the census of microbial members of many natural ecosystems. Recently, attention is increasingly being paid to the microbial residents of human-made, built ecosystems, both private (homes) and public (subways, office buildings, and hospitals). Here, we report results of the characterization of the microbial ecology of a singular built environment, the International Space Station (ISS). This ISS sampling involved the collection and microbial analysis (via 16S rDNA PCR) of 15 surfaces sampled by swabs onboard the ISS. This sampling was a component of Project MERCCURI (Microbial Ecology Research Combining Citizen and University Researchers on ISS). Learning more about the microbial inhabitants of the "buildings" in which we travel through space will take on increasing importance, as plans for human exploration continue, with the possibility of colonization of other planets and moons. RESULTS: Sterile swabs were used to sample 15 surfaces onboard the ISS. The sites sampled were designed to be analogous to samples collected for (1) the Wildlife of Our Homes project and (2) a study of cell phones and shoes that were concurrently being collected for another component of Project MERCCURI. Sequencing of the 16S rDNA genes amplified from DNA extracted from each swab was used to produce a census of the microbes present on each surface sampled. We compared the microbes found on the ISS swabs to those from both homes on Earth and data from the Human Microbiome Project. CONCLUSIONS: While significantly different from homes on Earth and the Human Microbiome Project samples analyzed here, the microbial community composition on the ISS was more similar to home surfaces than to the human microbiome samples. The ISS surfaces are species-rich with 1,036-4,294 operational taxonomic units (OTUs per sample). There was no discernible biogeography of microbes on the 15 ISS surfaces, although this may be a reflection of the small sample size we were able to obtain.

19.
Genome Announc ; 4(1)2016 Feb 18.
Artigo em Inglês | MEDLINE | ID: mdl-26893412

RESUMO

Here, we present the draft genome sequences for Pseudoalteromonas sp. strain UCD-33C and Pseudoalteromonas lipolytica UCD-48B. Pseudoalteromonas sp. UCD-33C was isolated from Zostera marina roots and P. lipolytica UCD-48B from Z. marina leaf blades, both collected in Woods Hole, MA. These assemblies contain 4,479,285 bp and 4,592,435 bp, respectively.

20.
Genome Announc ; 4(1)2016 Feb 18.
Artigo em Inglês | MEDLINE | ID: mdl-26893436

RESUMO

Here, we present the draft genome sequences of Vibrio splendidus UCD-SED7 and UCD-SED10 (phylum Proteobacteria). These strains were isolated from sediment surrounding Zostera marina roots near the UC Davis Bodega Marine Laboratory (Bodega, Bay, California). These assemblies contain 5,334,236 bp and 5,904,824 bp, respectively.

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