The need for and value of nurse and midwife prescribing: Findings from an Irish research investigation.

AIM: The aim of this study is to determine the need for and value of nurse and midwife prescribing in Ireland as identified by these prescribers-the people most able to provide relevant insights and information. BACKGROUND: Since 2007, nurses and midwives in Ireland who have passed an additional educational program can prescribe medicinal products relative to their clinical practice areas. Research evidence of efficacy is needed now for prescribing sustainability in Ireland and to encourage, if successful, the adoption or expansion of frontline nurse/midwife prescribing rights in other countries. DESIGN: A qualitative study was undertaken. METHODS: Interviews with registered nurse and midwife prescribers were conducted in 2017 until data saturation. Constant-comparative coding and categorization of data revealed themes and categories, with explanatory quotes for research trustworthiness and credibility purposes. RESULTS: Six data themes emerged: (a) more than just writing prescriptions; (b) highly individualized evidence-based specialist care; (c) assured, timely and rapid accessibility to needed care; (d) health system and healthcare efficiency gains; (e) satisfaction with nurse/midwife prescriber services and (f) quality care improvements. CONCLUSION: Nurse/midwife prescribing in Ireland was identified as needed, safe, effective and cost-effective. Prescribing permitted accessible, thorough and proactive holistic health promotive care to be provided in nurse- or midwife-led outpatient clinics.

Nurse and midwifery prescribing in Ireland: A scope-of-practice development for worldwide consideration.

For 10 years, select Irish nurses and midwives who pass a rigorous 6 month theory and practical program can prescribe medications and other medicinal products. Given the need for timely, accessible, and affordable health-care services in all countries, this nursing/midwifery education and practice development is worthy of examination. Irish nurse/midwife prescribing occurred following long-term deliberative nursing profession advocacy, nursing education planning, nursing administration and practice planning, interdisciplinary health-care team support and complementary efforts, and government action. A review of documents, research, and other articles was undertaken to examine this development process and report evaluative information for consideration by other countries seeking to improve their health-care systems. Nurse/midwife prescribing was accomplished successfully in Ireland, with the steps taken there to initiate and establish nurse/midwife prescribing of value internationally.

16S rRNA and As-Related Functional Diversity: Contrasting Fingerprints in Arsenic-Rich Sediments from an Acid Mine Drainage.

To gain an in-depth insight into the diversity and the distribution of genes under the particular evolutionary pressure of an arsenic-rich acid mine drainage (AMD), the genes involved in bacterial arsenic detoxification (arsB, ACR3) and arsenite oxidation (aioA) were investigated in sediment from Carnoulès (France), in parallel to the diversity and global distribution of the metabolically active bacteria. The metabolically active bacteria were affiliated mainly to AMD specialists, i.e., organisms detected in or isolated from AMDs throughout the world. They included mainly Acidobacteria and the non-affiliated "Candidatus Fodinabacter communificans," as well as Thiomonas and Acidithiobacillus spp., Actinobacteria, and unclassified Gammaproteobacteria. The distribution range of these organisms suggested that they show niche conservatism. Sixteen types of deduced protein sequences of arsenite transporters (5 ArsB and 11 Acr3p) were detected, whereas a single type of arsenite oxidase (AioA) was found. Our data suggested that at Carnoulès, the aioA gene was more recent than those encoding arsenite transporters and subjected to a different molecular evolution. In contrast to the 16S ribosomal RNA (16S rRNA) genes associated with AMD environments worldwide, the functional genes aioA, ACR3, and to a lesser extent arsB, were either novel or specific to Carnoulès, raising the question as to whether these functional genes are specific to high concentrations of arsenic, AMD-specific, or site-specific.

Microbial diversity in Los Azufres geothermal field (Michoacán, Mexico) and isolation of representative sulfate and sulfur reducers.

Los Azufres spa consists of a hydrothermal spring system in the Mexican Volcanic Axis. Five samples (two microbial mats, two mud pools and one cenote water), characterized by high acidity (pH between 1 and 3) and temperatures varying from 27 to 87 °C, were investigated for their microbial diversity by Terminal-Restriction Fragment Length Polymorphism (T-RFLP) and 16S rRNA gene library analyses. These data are the first to describe microbial diversity from Los Azufres geothermal belt. The data obtained from both approaches suggested a low bacterial diversity in all five samples. Despite their proximity, the sampling points differed by their physico-chemical conditions (mainly temperature and matrix type) and thus exhibited different dominant bacterial populations: anoxygenic phototrophs related to the genus Rhodobacter in the biomats, colorless sulfur oxidizers Acidithiobacillus sp. in the warm mud and water samples, and Lyzobacter sp.-related populations in the hot mud sample (87 °C). Molecular data also allowed the detection of sulfate and sulfur reducers related to Thermodesulfobium and Desulfurella genera. Several strains affiliated to both genera were enriched or isolated from the mesophilic mud sample. A feature common to all samples was the dominance of bacteria involved in sulfur and iron biogeochemical cycles (Rhodobacter, Acidithiobacillus, Thiomonas, Desulfurella and Thermodesulfobium genera).

Impact of a simulated oil spill on benthic phototrophs and nitrogen-fixing bacteria in mudflat mesocosms.

Coastal and estuarine ecosystems are highly susceptible to crude oil pollution. Therefore, in order to examine the resilience of benthic phototrophs that are pivotal to coastal ecosystem functioning, we simulated an oil spill in tidal mesocosms consisting of intact sediment cores from a mudflat at the mouth of the Colne Estuary, UK. At day 21, fluorescence imaging revealed a bloom of cyanobacteria on the surface of oiled sediment cores, and the upper 1.5 cm thick sediment had 7.2 times more cyanobacterial and 1.7 times more diatom rRNA sequences when treated with oil. Photosystem II operating efficiency (Fq'/Fm') was significantly reduced in oiled sediments at day 7, implying that the initial diatom-dominated community was negatively affected by oil, but this was no longer apparent by day 21. Oil addition significantly reduced numbers of the key deposit feeders, and the decreased grazing pressure is likely to be a major factor in the increased abundance of both diatoms and cyanobacteria. By day 5 concentrations of dissolved inorganic nitrogen were significantly lower in oiled mesocosms, likely resulting in the observed increase in nifH-containing, and therefore potentially dinitrogen-fixing, cyanobacteria. Thus, indirect effects of oil, rather than direct inhibition, are primarily responsible for altering the microphytobenthos.

Bacterial biodiversity from anthropogenic extreme environments: a hyper-alkaline and hyper-saline industrial residue contaminated by chromium and iron.

Anthropogenic extreme environments are among the most interesting sites for the bioprospection of extremophiles since the selection pressures may favor the presence of microorganisms of great interest for taxonomical and astrobiological research as well as for bioremediation technologies and industrial applications. In this work, T-RFLP and 16S rRNA gene library analyses were carried out to describe the autochthonous bacterial populations from an industrial waste characterized as hyper-alkaline (pH between 9 and 14), hyper-saline (around 100 PSU) and highly contaminated with metals, mainly chromium (from 5 to 18 g kg(-1)) and iron (from 2 to 108 g kg(-1)). Due to matrix interference with DNA extraction, a protocol optimization step was required in order to carry out molecular analyses. The most abundant populations, as evaluated by both T-RFLP and 16S rRNA gene library analyses, were affiliated to Bacillus and Lysobacter genera. Lysobacter related sequences were present in the three samples: solid residue and lixiviate sediments from both dry and wet seasons. Sequences related to Thiobacillus were also found; although strains affiliated to this genus are known to have tolerance to metals, they have not previously been detected in alkaline environments. Together with Bacillus (already described as a metal reducer), such organisms could be of use in bioremediation technologies for reducing chromium, as well as for the prospection of enzymes of biotechnological interest.

Central role of dynamic tidal biofilms dominated by aerobic hydrocarbonoclastic bacteria and diatoms in the biodegradation of hydrocarbons in coastal mudflats.

Mudflats and salt marshes are habitats at the interface of aquatic and terrestrial systems that provide valuable services to ecosystems. Therefore, it is important to determine how catastrophic incidents, such as oil spills, influence the microbial communities in sediment that are pivotal to the function of the ecosystem and to identify the oil-degrading microbes that mitigate damage to the ecosystem. In this study, an oil spill was simulated by use of a tidal chamber containing intact diatom-dominated sediment cores from a temperate mudflat. Changes in the composition of bacteria and diatoms from both the sediment and tidal biofilms that had detached from the sediment surface were monitored as a function of hydrocarbon removal. The hydrocarbon concentration in the upper 1.5 cm of sediments decreased by 78% over 21 days, with at least 60% being attributed to biodegradation. Most phylotypes were minimally perturbed by the addition of oil, but at day 21, there was a 10-fold increase in the amount of cyanobacteria in the oiled sediment. Throughout the experiment, phylotypes associated with the aerobic degradation of hydrocarbons, including polycyclic aromatic hydrocarbons (PAHs) (Cycloclasticus) and alkanes (Alcanivorax, Oleibacter, and Oceanospirillales strain ME113), substantively increased in oiled mesocosms, collectively representing 2% of the pyrosequences in the oiled sediments at day 21. Tidal biofilms from oiled cores at day 22, however, consisted mostly of phylotypes related to Alcanivorax borkumensis (49% of clones), Oceanospirillales strain ME113 (11% of clones), and diatoms (14% of clones). Thus, aerobic hydrocarbon biodegradation is most likely to be the main mechanism of attenuation of crude oil in the early weeks of an oil spill, with tidal biofilms representing zones of high hydrocarbon-degrading activity.

Nursing students' views of clinical competence assessment.

This paper reports on some outcomes of a research study evaluating a new assessment framework of clinical competence used in undergraduate nursing programmes in the Mid West Region of Ireland. First, this paper presents both the strengths and weaknesses of the present model, as articulated by student nurses. Second, it generates a broader critical debate around the concept of competency assessment. The model of competence in question was developed by the Irish Nursing Board then elaborated on by the University of Limerick in partnership with local health service providers in 2002. Methodology involved a triangulated approach, comprising a series of focus group interviews with students (n=13) and preceptors (n=16) followed by a survey of students (n=232) and preceptors (n=837). Findings from the student focus groups are reported here. Themes identified using Burnard's (1991) framework for analysis are preparation for competency assessment, competency documentation, supporting assessment in practice, organisational and resource factors and the competency assessment structure and process. Results from this research have implications for refinement and revision of the present competency assessment framework, for student and staff preparation and for collaboration between stakeholders.

Sequential compression biomechanical device in patients with critical limb ischemia and nonreconstructible peripheral vascular disease.

OBJECTIVES: Critical limb ischemia (CLI) patients who are unsuitable for intervention face the dire prospect of primary amputation. Sequential compression biomechanical device (SCBD) therapy provides a limb salvage option for these patients. This study assessed the outcome of SCBD in severe CLI patients who otherwise would face an amputation. Primary end points were limb salvage and 30-day mortality. Secondary end points were hemodynamic outcomes (increase in popliteal artery flow and toe pressure), ulcer healing, quality-adjusted time without symptoms of disease or toxicity of treatment (Q-TwiST), and cost-effectiveness. METHODS: From 2004 to 2009, we assessed 4538 patients with peripheral vascular disease (PVD). Of these, 707 had CLI, 518 underwent intervention, and 189 were not suitable for any intervention. A total of 171 patients joined the SCBD program for 3 months. RESULTS: All patients were Rutherford category ≥4. Median follow-up was 13 months. Mean toe pressure increased from 39.9 to 55.42 mm Hg, with a mean difference in toe pressure of 15.49 mm Hg (P = .0001). Mean popliteal flow increased from 35.44 to 55.91 cm/s, with mean difference in popliteal flow of 20.47 cm/s (P < .0001). Mortality at 30 days was 0.6%. Median amputation-free survival was 18 months. Limb salvage at 3.5 years was 94%. Freedom from major adverse clinical events (MACE) at 4.5 years was 62.5%. We treated 171 patients with SCBD at a cost of €681,948, with an estimated median per-patient cost of treatment with SCBD of €3988. CONCLUSION: SCBD therapy is a cost-effective and clinically efficacious solution in CLI patients with no option of revascularization. It provides adequate limb salvage and ameliorated amputation-free survival while providing relief of rest pain without any intervention.

Student nurses and midwives' experiences of teaching and learning about 'making every contact count' health behaviour change programme: Descriptive qualitative study.

AIM/OBJECTIVE: To explore nursing/midwifery students' experiences of the teaching and learning of units one and two of a national undergraduate curriculum. BACKGROUND: The 'National Undergraduate Curriculum for Chronic Disease Prevention and Management: Making Every Contact Count' (MECC) is part of Ireland's national policy to support the prevention of chronic disease by promoting health behaviour change. This is being implemented as a programme within the Irish Health Service and is also being delivered, for the first time in undergraduate medical, allied health and nursing/midwifery education by tertiary education institutes. DESIGN: Qualitative descriptive research. METHODS: Purposeful sampling was used to recruit participants (n = 17) from an undergraduate nursing/midwifery programme (n = 131) in one tertiary level Irish institution. Four focus groups were undertaken by two members of the research team, who were not part of the module teaching team. Each focus group was guided by a semi-structured interview guide, recorded and transcribed verbatim. Thematic data analysis was undertaken. RESULTS: Three main themes were identified, namely: Building foundations and making connections; Personal responsibility and the Ah factor: now I understand. CONCLUSION: Findings indicate that students had a positive learning experience whilst also highlighting the students' transition to lifelong learning encompassing adult learning and personal responsibility.

Towards the development of a national patient transfer document between residential and acute care-A pilot study.

BACKGROUND: A lack of standardisation of documentation accompanying older people when transferring from residential to acute care is common and this may result in gaps in information and in care for older people. In Ireland, this lack of standardisation prompted the development of an evidence based national transfer document. OBJECTIVES: To pilot a new national transfer document for use when transferring older people from residential to acute care and obtain the perceptions of its use from staff in residential and acute care settings. METHODS: This was a pre- and post-study design using purposive sampling following the STROBE guidelines. The pilot was conducted in 26 sites providing residential care and three university hospitals providing acute care. Pre-pilot questionnaires focused on current documentation and were distributed to staff in residential care (n = 875). A pilot of the new paper-based transfer document was then conducted over three months and post-pilot questionnaires distributed to staff from both residential and acute care settings (n = 1085). The findings of the pilot study were discussed with multidisciplinary expert advisory and stakeholder groups who recommended some revisions. This consensus informed the development of the final design of the new revised transfer document. RESULTS: Pre-pilot: 23% response rate; 83% (n = 168) participants agreed/strongly agreed that existing documentation was straightforward to complete but could be more person-centred. Post-pilot: 11% response rate; 75% (n = 93) of participants agreed/strongly agreed that the new transfer document promoted person-centred care but recommended revisions to the new document regarding layout and time to complete. CONCLUSIONS: This study highlighted some of the challenges of providing safe, effective and relevant transfer information that is feasible and usable in everyday practice. IMPLICATIONS FOR PRACTICE: Standardisation and being person-centred are important determining factors in the provision of relevant up to date information on the resident being transferred.

Identifying contemporary early retirement factors and strategies to encourage and enable longer working lives: A scoping review.

AIM: Accelerating population ageing is raising concern in many countries now in relation to the availability of workers for essential work roles and responsibilities. A scoping research literature review was done to identify factors currently associated with early retirement and contemporary strategies to encourage and support longer working lives. METHODS: Using the PRISMA-ScR Checklist, we searched the Directory of Open Access Journals and EBSCO Discovery Service for published 2013-2018 research articles using the keyword/MeSH term "early retirement"; 54 English-language articles in peer-review journals were reviewed. RESULTS: Seven early retirement factors were revealed: Ill health, good health, workplace issues, the work itself, ageism, social norms and having achieved personal financial or pension requirement criteria. Six suggested solutions, none proven effective, were identified: Occupational health programmes, workplace enhancements, work adjustments, addressing ageism, changing social norms and pension changes. CONCLUSIONS: The evidence base on early retirement prevention is not strong, with qualitative investigations needed for in-depth understandings of early retirement influences and mixed-methods studies needed to test early retirement prevention solutions for their effects. IMPLICATIONS FOR PRACTICE: Until more evidence is available, every organisation should perform an early retirement risk assessment and identify current versus needed policies and programmes to encourage and enable more middle-aged and older people to work longer.

Home students' experiences of intercultural learning: A qualitative descriptive design.

BACKGROUND: Higher education institutes are witnessing an increase in the cultural and ethnic diversity of their student population. While this adds to the learning experience, there is a dearth of evidence examining how students on nursing programmes, from different cultural and ethnic backgrounds learn with and from each other. There is need for a greater understanding of the factors that both facilitate and inhibit intercultural learning within the classroom. OBJECTIVES: This study explored the perceptions and experiences of home students on a postgraduate nursing programme, of intercultural learning within the classroom. DESIGN: A qualitative descriptive design was used. SETTINGS: Home students enrolled on a suite of postgraduate nursing programmes in one region of Ireland who were registered for co-scheduled modules with international students, were recruited to participate on a voluntary basis. PARTICIPANTS: Fourteen home students (13 females and 1 male) were purposively sampled. METHODS: Data were collected using digitally recorded one to one semi-structured interviews (ten 'face to face' and four telephone). Data were thematically analysed using a modified version of Braun and Clarke's (2006) framework. RESULTS: This study describes the value of intercultural learning in the classroom and draws attention to some of the challenges experienced by home students. Furthermore, it highlights the importance of exploring similarities, whilst respecting differences in prior educational experiences, learning styles and cultural backgrounds. The overarching theme, Navigating intercultural learning describes home students' experiences of developing awareness, connecting and sharing cultural knowledge. CONCLUSIONS: Intercultural learning takes time and requires commitment, emphasising the need for careful consideration of facilitation techniques, preparation, support and planning pedagogies that encourage effective intercultural learning. The findings make a valuable contribution to existing knowledge on internationalising nurse education, specifically with regards to intercultural relations and the perceptions and experiences of teaching and learning in intercultural classrooms.

Key stakeholders' perspectives on the development of a national transfer document, for older persons, when transferring between the residential and acute care settings: A qualitative descriptive study.

AIMS AND OBJECTIVES: This study has aimed to examine key stakeholders' perspectives, views and experiences regarding transfer documents, used when an older person is being transferred from a residential to an acute care setting. The objective of the study was to inform, in part, the development of an effective national transfer document. BACKGROUND: For the effective and safe transfer of older persons from residential to acute care settings, it is important to ensure that the transfer document encapsulates relevant, current and person-centred information to ensure a smooth, quality and safe transition. Evidence highlights that, where documentation has lacked vital and relevant information, the older persons experience negative impacts during the transfer process. DESIGN: A qualitative descriptive study was conducted, following the COREQ checklist, to establish participants' perspectives, views and experiences of using transfer documents. METHODS: Focus group interviews (n = 8) were conducted with a convenience sample of key stakeholders (n = 68) in an Irish setting. The data were analysed using content analysis. RESULTS: The findings have highlighted the important aspects for consideration in the development of future transfer documentation. The three broad categories, used to present the data findings, are (a) existing transfer documentation; (b) design framework; and (c) essentials of care. CONCLUSIONS: The transfer document of the future is required to be concise, regularly reviewed and with a user-friendly colour-coded design. Essential and current information, with an emphasis on person centeredness, must be in the first page, with more detailed supporting information in the subsequent sections.

High benzene concentrations can favour Gram-positive bacteria in groundwaters from a contaminated aquifer.

Exposure to pollution exerts strong selective pressure on microbial communities, which may affect their potential to adapt to current or future environmental challenges. In this microcosm study, we used DNA fingerprinting based on 16S rRNA genes to document the impact of high concentrations of benzene on two bacterial communities from a benzene-contaminated aquifer situated below a petrochemical plant (SIReN, UK). The two groundwaters harboured distinct aerobic benzene-degrading communities able to metabolize benzene to below detection levels (1 microg L(-1)). A benzene concentration of 100 mg L(-1) caused a major shift from Betaproteobacteria to Actinobacteria, in particular Arthrobacter spp. A similar shift from Betaproteobacteria to Arthrobacter spp. and Rhodococcus erythropolis was observed in minimal medium (MM) inoculated with a third groundwater. These Gram-positive-dominated communities were able to grow on benzene at concentrations up to 600 mg L(-1) in groundwater and up to 1000 mg L(-1) in MM, concentrations that cause significant solvent stress to cellular systems. Therefore, Gram-positive bacteria were better competitors than Gram-negative organisms under experimental conditions of high benzene loads, which suggests that solvent-tolerant Gram-positive bacteria can play a role in the natural attenuation of benzene or the remediation of contaminated sites.

Potential and challenges for learning during acute medical/surgical placement for intellectual disability, mental health and midwifery students.

In Ireland nursing and midwifery degree programmes involve four pathways to registration. Three of which, intellectual disability and mental health nursing and midwifery require students to undertake acute medical/surgical placements offering learning opportunities caring for patients with complex needs in settings beyond their core discipline. This paper focuses on findings from a descriptive qualitative study exploring intellectual disability and mental health nursing and midwifery students experiences of such placements. Data analysis identified three themes: Getting ready, Navigating the way and Getting through. Feelings of stress and uncertainty are described by participants when moving from familiarity within a chosen discipline to an unfamiliar environment. Findings have influenced specific placement structures with local health service partners. While our study focuses on an Irish context, findings have relevance for student education in other jurisdictions. Enhancing preparation and support for students undertaking unfamiliar placements needs to be a constant endeavour. Such foundations will foster valuable experiences where students can feel part of a team, gain confidence, enhance skills and transfer meaningful learning to their core practice discipline. Further research is needed to explore the views of preceptors, ward managers and Clinical Placement Coordinators.

Heterogeneous aerobic benzene-degrading communities in oxygen-depleted groundwaters.

A sandstone aquifer beneath a petrochemicals plant (SIReN site, UK) is heterogeneously contaminated with benzene and oxygen-depleted. Despite low redox potentials in three of the most contaminated groundwaters (benzene concentrations from 17.8 to 294 mg L(-1)), we observed aerobic benzene degradation in microcosms, indicating the presence in situ of a latent community of obligate aerobic microorganisms or an active community of facultative aerobes responding rapidly to oxygen ingress. Moreover, benzene degradation occurred at the ambient pH of 8.9 and 9.4, considerably more alkaline conditions than previously reported. 16S rRNA analyses showed that the groundwater microcosm communities were distinct from each other, despite sharing the function of aerobic benzene degradation. From DNA fingerprinting, one consortium was dominated by Acidovorax spp., another by Pseudomonas spp.; these benzene-degrading consortia were similar to the in situ communities, perhaps indicating that these organisms are active in situ and degrading benzene microaerophilically or by denitrification. Conversely, in the third sample, benzene degradation occurred only after the community changed from a Rhodoferax-dominated community to a mix of Rhodococcus and Hydrogenophaga spp. Four of the main benzene-degrading strains were brought into culture: Hydrogenophaga and Pseudomonas spp., and two strains of Rhodococcus erythropolis, a ubiquitous and metabolically versatile organism.

Integron diversity in bacterial communities of freshwater sediments at different contamination levels.

Integrons, genetic elements known to be involved in the adaptation of pathogenic bacteria, were first discovered in the clinical setting. However, they are ancient structures found in various environments. When clinical integrons have a low diversity, with three integrases and gene cassettes essentially encoding antibiotic resistance, in natural environments, integrons show a greater diversity, of both gene cassettes and integrases. Although a large number of gene cassettes from environmental samples have been identified, integrase diversity remains poorly documented, and has not yet been investigated in freshwater environments. The work presented here explores environmental integrons in sediments from a freshwater environment, with emphasis on integrases. Integron diversity in bacterial communities was analyzed at sampling stations with different contamination levels and contaminant types. A total of 684 integrase sequences were obtained and grouped into 322 previously undescribed integron classes, revealing a diversity wider than that previously expected in non-clinical environments. The bacterial community structures did not fully explain the integron diversity suggesting that integrase diversity could be influenced by contamination level, and that contaminant type could influence gene cassette diversity. These results provide further arguments for the involvement of integrons in the adaptation of bacterial communities in response to contaminants in natural environments.

Improving social functioning and reducing social isolation and loneliness among people with enduring mental illness: Report of a randomised controlled trial of supported socialisation.

BACKGROUND: This randomised controlled trial examined if for people with enduring mental illness, being supported to socialise leads to improved social functioning, increased self-esteem and extended social networks; a reduction in social isolation, social, emotional and family loneliness and a reduction in illness symptoms, namely depression. METHODS: A prospective randomised controlled trial was undertaken from November 2007 to September 2011. Service users with a diagnosis of enduring mental illness (>18 years) were invited to participate. Participants were randomly allocated to intervention or control group conditions in a 1:1 ratio. Intervention group participants were matched with a volunteer partner, asked to engage in social/leisure activities for 2 hours weekly over a 9-month period, and received a €20 stipend monthly. Control group participants received a €20 monthly stipend and were asked to engage in a weekly social/leisure activity. Social functioning, the primary outcome, was measured using the Social Functioning Scale (SFS) at three time points (baseline, midpoint and endpoint). FINDINGS: In all, 107 people completed this study. There were no significant differences between control and intervention groups at the commencement of the intervention on demographic characteristics or the main outcome measures of interest. Overall social functioning positively changed throughout the three time points from a mean of 99·7 (standard deviation (SD) = 15.1) at baseline, to a mean of 106.0 (SD = 27.0) at the endpoint for the control group, and from a mean of 100·4 (SD = 15.0) at Time 1 for the intervention group, to a mean of 104.1 (SD = 23.4) at the endpoint for the intervention group. CONCLUSIONS: The intervention showed no statistical differences between the control and intervention groups on primary or secondary outcome measures. The stipend and the stipend plus volunteer partner led to an increase in recreational social functioning; a decrease in levels of social loneliness, in depression and in the proportion living within a vulnerable social network.

Diversity and spatiotemporal dynamics of bacterial communities: physicochemical and other drivers along an acid mine drainage.

Deciphering the biotic and abiotic factors that control microbial community structure over time and along an environmental gradient is a pivotal question in microbial ecology. Carnoulès mine (France), which is characterized by acid waters and very high concentrations of arsenic, iron, and sulfate, provides an excellent opportunity to study these factors along the pollution gradient of Reigous Creek. To this end, biodiversity and spatiotemporal distribution of bacterial communities were characterized using T-RFLP fingerprinting and high-throughput sequencing. Patterns of spatial and temporal variations in bacterial community composition linked to changes in the physicochemical conditions suggested that species-sorting processes were at work in the acid mine drainage. Arsenic, temperature, and sulfate appeared to be the most important factors that drove the composition of bacterial communities along this continuum. Time series investigation along the pollution gradient also highlighted habitat specialization for some major members of the community (Acidithiobacillus and Thiomonas), dispersal for Acidithiobacillus, and evidence of extinction/re-thriving processes for Gallionella. Finally, pyrosequencing revealed a broader phylogenetic range of taxa than previous clone library-based diversity. Overall, our findings suggest that in addition to environmental filtering processes, additional forces (dispersal, birth/death events) could operate in AMD community.