scholarly journals Community context matters for bacteria-phage ecology and evolution

2021 ◽  
Author(s):  
Michael Blazanin ◽  
Paul E. Turner
Keyword(s):  
Community Context ◽  
Phage Ecology

scholarly journals Community context matters for bacteria-phage ecology and evolution

2021 ◽  
Author(s):  
Michael Blazanin ◽  
Paul E. Turner
Keyword(s):  
Bacterial Community ◽  
Bacterial Species ◽  
Community Context ◽  
Ecological Interactions ◽  
Biological Models ◽  
Phage Ecology ◽  
Additional Investigation ◽  
Mechanisms Of Adaptation ◽  
Community Presence

Bacteria-phage symbioses are ubiquitous in nature and serve as valuable biological models. Historically, the ecology and evolution of bacteria-phage systems have been studied in either very simple or very complex communities. Although both approaches provide insight, their shortcomings limit our understanding of bacteria and phages in multispecies contexts. To address this gap, here we synthesize the emerging body of bacteria-phage experiments in medium-complexity communities, specifically those that manipulate bacterial community presence. Generally, community presence suppresses both focal bacterial (phage host) and phage densities, while sometimes altering bacteria-phage ecological interactions in diverse ways. Simultaneously, community presence can have an array of evolutionary effects. Sometimes community presence has no effect on the coevolutionary dynamics of bacteria and their associated phages, whereas other times the presence of additional bacterial species constrains bacteria-phage coevolution. At the same time, community context can alter mechanisms of adaptation and interact with the pleiotropic consequences of (co)evolution. Ultimately, these experiments show that community context can have important ecological and evolutionary effects on bacteria-phage systems, but many questions still remain unanswered and ripe for additional investigation.

Individual Action and Community Context: The Health Intervention Project

2006 ◽  
Author(s):  
Claire E. Sterk ◽  
Kirk W. Elifson ◽  
Katherine P. Theall
Keyword(s):  
Health Intervention ◽  
Community Context ◽  
Individual Action

Acculturative stress among Latina young adult immigrants: The mediating role of receiving community context.

2019 ◽  
Vol 5 (1) ◽  
pp. 91-110
Author(s):  
Michael G. Verile ◽  
Melissa M. Ertl ◽  
Frank R. Dillon ◽  
Mario De La Rosa
Keyword(s):  
Young Adult ◽  
Acculturative Stress ◽  
Community Context ◽  
Mediating Role ◽  
Adult Immigrants

Validity of puberty self-report in children and adolescents in Ho Chi Minh City

MedPharmRes ◽  
2020 ◽  
Vol 4 (4) ◽  
pp. 33-37
Author(s):  
Tam M. Do ◽  
Thanh K. Van ◽  
Huyen TT. Bich ◽  
Thanh TK. Tran ◽  
Minh X. Ngo ◽  
...  
Keyword(s):  
Children And Adolescents ◽  
Sexual Maturation ◽  
Kappa Statistic ◽  
Community Context ◽  
Self Report ◽  
Ho Chi Minh City ◽  
Pubertal Stage ◽  
Perfect Agreement ◽  
Kendall’S Τ ◽  
High Concordance

Background: Puberty is a milestone in child and adolescent development, yet a feasible tool to accurately assess pubertal stage in community context has not been validated in Vietnam. Aim: This study was conducted to validate pubertal self-report among Ho Chi Minh City children and adolescents in comparison with paediatrician’s assessment. Methods: 80 girls and 76 boys aged from 6 to 17 years old from 5 schools in Ho Chi Minh City were recruited. Self-administered questionnaires about sexual maturation were distributed to participants and results were compared with physician’s pubertal examination. Kappa statistic and Kendall’s τ b were used to evaluate validity of the questionnaire. Results: Boys tended to overestimate their development stages while girls tended to underestimate. Fair to almost perfect agreement between students’ reports and paediatricians’ evaluation, along with high concordance was recorded, however younger boys (aged 6-11) showed limited evaluation of their own sexual maturation. Conclusion: This method was inaccurate to evaluate younger boys’ sexual maturation; however, acceptable accuracy in sexual maturation estimation among younger girls and adolescents could allow it to serve as an effective screening tool in community context.

Asserting the Capacity to be Free

2018 ◽  
Vol 11 (2) ◽  
pp. 53-69
Author(s):  
Catherine Kramarczuk Voulgarides
Keyword(s):  
United States ◽  
Connective Tissue ◽  
Qualitative Data ◽  
Local Community ◽  
Zero Tolerance ◽  
Young Men ◽  
Community Context ◽  
Northeastern United States ◽  
Suburban School District ◽  
The Social

In this article, I explore how the social contract of schooling and the three functions of schooling (Noguera 2003)—to sort, to socialize, and to control— impact and constrain the freedom and agency of a group of young Black and Latinx men in one suburban school district that was experiencing sociodemographic shifts in the Northeastern United States. I use qualitative data to frame how the young men experience schooling, and I show how the local community context facilitates the institutionalization of discriminatory sorting processes and racially prejudiced norms. I also show how the young men are excessively controlled and monitored via zero tolerance disciplinary practices, which effectively constrains their humanity and capacity to freely exist in their school and which inadvertently strengthens the connective tissue between schools and prisons.

scholarly journals Lifestyle of sponge symbiont phages by host prediction and correlative microscopy

2021 ◽  
Author(s):  
M. T. Jahn ◽  
T. Lachnit ◽  
S. M. Markert ◽  
C. Stigloher ◽  
L. Pita ◽  
...  
Keyword(s):  
Distinct Pattern ◽  
Microbial Consortia ◽  
Bacterial Symbionts ◽  
Correlative Microscopy ◽  
Phage Ecology ◽  
Infection Dynamics ◽  
Imaging Approach ◽  
Animal Hosts ◽  
Viral Distribution

AbstractBacteriophages (phages) are ubiquitous elements in nature, but their ecology and role in animals remains little understood. Sponges represent the oldest known extant animal-microbe symbiosis and are associated with dense and diverse microbial consortia. Here we investigate the tripartite interaction between phages, bacterial symbionts, and the sponge host. We combined imaging and bioinformatics to tackle important questions on who the phage hosts are and what the replication mode and spatial distribution within the animal is. This approach led to the discovery of distinct phage-microbe infection networks in sponge versus seawater microbiomes. A new correlative in situ imaging approach (‘PhageFISH-CLEM‘) localised phages within bacterial symbiont cells, but also within phagocytotically active sponge cells. We postulate that the phagocytosis of free virions by sponge cells modulates phage-bacteria ratios and ultimately controls infection dynamics. Prediction of phage replication strategies indicated a distinct pattern, where lysogeny dominates the sponge microbiome, likely fostered by sponge host-mediated virion clearance, while lysis dominates in seawater. Collectively, this work provides new insights into phage ecology within sponges, highlighting the importance of tripartite animal-phage-bacterium interplay in holobiont functioning. We anticipate that our imaging approach will be instrumental to further understanding of viral distribution and cellular association in animal hosts.

scholarly journals Identifying and Managing Malnutrition, Frailty and Sarcopenia in the Community: A Narrative Review

Nutrients ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 2316
Author(s):  
Shelley Roberts ◽  
Peter Collins ◽  
Megan Rattray
Keyword(s):  
Healthcare Professionals ◽  
Monitoring And Evaluation ◽  
Community Dwelling ◽  
Community Context ◽  
Care Process ◽  
Community Settings ◽  
Community Based ◽  
Comprehensive Overview ◽  
Nutrition Care ◽  
Community Dwelling Older Adults

Malnutrition, frailty and sarcopenia are becoming increasingly prevalent among community-dwelling older adults; yet are often unidentified and untreated in community settings. There is an urgent need for community-based healthcare professionals (HCPs) from all disciplines, including medicine, nursing and allied health, to be aware of, and to be able to recognise and appropriately manage these conditions. This paper provides a comprehensive overview of malnutrition, frailty and sarcopenia in the community, including their definitions, prevalence, impacts and causes/risk factors; and guidance on how these conditions may be identified and managed by HCPs in the community. A detailed description of the care process, including screening and referral, assessment and diagnosis, intervention, and monitoring and evaluation, relevant to the community context, is also provided. Further research exploring the barriers/enablers to delivering high-quality nutrition care to older community-dwelling adults who are malnourished, frail or sarcopenic is recommended, to inform the development of specific guidance for HCPs in identifying and managing these conditions in the community.

Individual characteristics and community context in decisions to divert or arrest

2021 ◽  
Vol 55 (2) ◽  
pp. 320-342
Author(s):  
Melissa R. Nadel ◽  
George Pesta ◽  
Thomas Blomberg ◽  
William D. Bales
Keyword(s):  
Individual Characteristics ◽  
Community Context
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