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Infant microbiome

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https://www.readbyqxmd.com/read/29330010/nasopharyngeal-lactobacillus-is-associated-with-childhood-wheezing-illnesses-following-acute-respiratory-syncytial-virus-infection-in-infancy
#1
Christian Rosas-Salazar, Meghan H Shilts, Andrey Tovchigrechko, Seth Schobel, James D Chappell, Emma K Larkin, Tebeb Gebretsadik, Rebecca A Halpin, Karen E Nelson, Martin L Moore, Larry J Anderson, R Stokes Peebles, Suman R Das, Tina V Hartert
BACKGROUND: Early-life acute respiratory infection (ARI) with respiratory syncytial virus (RSV) has been strongly associated with the development of childhood wheezing illnesses, but the pathways underlying this association are poorly understood. OBJECTIVE: To examine the role of the nasopharyngeal microbiome in the development of childhood wheezing illnesses following RSV ARI in infancy. METHODS: We conducted a nested cohort study of 118 previously healthy, term infants with confirmed RSV ARI by RT-PCR...
January 9, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29325581/haemophilus-is-overrepresented-in-the-nasopharynx-of-infants-hospitalized-with-rsv-infection-and-associated-with-increased-viral-load-and-enhanced-mucosal-cxcl8-responses
#2
Thomas H A Ederveen, Gerben Ferwerda, Inge M Ahout, Marloes Vissers, Ronald de Groot, Jos Boekhorst, Harro M Timmerman, Martijn A Huynen, Sacha A F T van Hijum, Marien I de Jonge
BACKGROUND: While almost all infants are infected with respiratory syncytial virus (RSV) before the age of 2 years, only a small percentage develops severe disease. Previous studies suggest that the nasopharyngeal microbiome affects disease development. We therefore studied the effect of the nasopharyngeal microbiome on viral load and mucosal cytokine responses, two important factors influencing the pathophysiology of RSV disease. To determine the relation between (i) the microbiome of the upper respiratory tract, (ii) viral load, and (iii) host mucosal inflammation during an RSV infection, nasopharyngeal microbiota profiles of RSV infected infants (< 6 months) with different levels of disease severity and age-matched healthy controls were determined by 16S rRNA marker gene sequencing...
January 11, 2018: Microbiome
https://www.readbyqxmd.com/read/29315948/a-patient-specific-approach-to-developing-an-exclusion-diet-to-manage-food-allergy-in-infants-and-children
#3
Carina Venter, Marion Groetch, Merryn Netting, Rosan Meyer
Food allergy is becoming increasingly common in infants and young children. This paper set out to explain the different factors that should be taken into account during an individualized allergy consultation: Foods to avoid and degree of avoidance, suitable alternatives, self-management skills, co-and cross-reactive allergens and novel allergens alongside the role of the industry in allergen avoidance, importance of nutritional aspects of the diet and the future directions that nutritional guidance make take...
January 8, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29310579/gene-trait-matching-across-the-bifidobacterium-longum-pan-genome-reveals-considerable-diversity-in-carbohydrate-catabolism-among-human-infant-strains
#4
Silvia Arboleya, Francesca Bottacini, Mary O'Connell-Motherway, C Anthony Ryan, R Paul Ross, Douwe van Sinderen, Catherine Stanton
BACKGROUND: Bifidobacterium longum is a common member of the human gut microbiota and is frequently present at high numbers in the gut microbiota of humans throughout life, thus indicative of a close symbiotic host-microbe relationship. Different mechanisms may be responsible for the high competitiveness of this taxon in its human host to allow stable establishment in the complex and dynamic intestinal microbiota environment. The objective of this study was to assess the genetic and metabolic diversity in a set of 20 B...
January 8, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29298732/the-association-between-anterior-nares-and-nasopharyngeal-microbiota-in-infants-hospitalized-for-bronchiolitis
#5
Pamela N Luna, Kohei Hasegawa, Nadim J Ajami, Janice A Espinola, David M Henke, Joseph F Petrosino, Pedro A Piedra, Ashley F Sullivan, Carlos A Camargo, Chad A Shaw, Jonathan M Mansbach
BACKGROUND: The airway microbiome is a subject of great interest for the study of respiratory disease. Anterior nare samples are more accessible than samples from deeper within the nasopharynx. However, the correlation between the microbiota found in the anterior nares and the microbiota found within the nasopharynx is unknown. We assessed the anterior nares and nasopharyngeal microbiota to determine (1) the relation of the microbiota from these two upper airway sites and (2) if associations were maintained between the microbiota from these two sites and two bronchiolitis severity outcomes...
January 3, 2018: Microbiome
https://www.readbyqxmd.com/read/29283050/antibiotics-associated-disorders-and-postbiotics-induced-rescue-in-gut-health
#6
Debarati Paul, Sounik Manna, Santi M Mandal
The gut microbiota plays significant roles in the human body during all spheres' of life and influences innate immunity, promotes granulocyte signaling and provides resistance during pathogenic colonization of the gut; crucial for a healthy life. Antibiotics directly affect the gut microbiota that consequently alter the basic biological processes, and imposes severe consequences in population falling under different age groups. In this article, we have assessed the differences in microbial colonization and immune function of the intestinal tract in infants, adults, and the aged people and also have examined the recent reports describing the impacts of antibiotics on infant microbiome assembly and functioning...
December 27, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29275816/probiotics-and-necrotizing-enterocolitis
#7
Ravi Mangal Patel, Mark A Underwood
In this review, we summarize existing knowledge regarding the effects of probiotics on necrotizing enterocolitis (NEC). We review the role of the microbiome in NEC and pre-clinical data on mechanisms of probiotic action. Next, we summarize existing randomized controlled trials and observational studies of probiotics to prevent NEC. We also summarize findings from several recent meta-analyses and report a new cumulative meta-analysis of probiotic trials. Finally, we review data from cohorts routinely using commercially available probiotics...
February 2018: Seminars in Pediatric Surgery
https://www.readbyqxmd.com/read/29275813/the-science-and-necessity-of-using-animal-models-in-the-study-of-necrotizing-enterocolitis
#8
Guillermo J Ares, Steven J McElroy, Catherine J Hunter
Necrotizing enterocolitis (NEC) remains one of the highest causes of mortality and of acute and long-term morbidity in premature infants. Multiple factors are involved in the pathophysiology of NEC including the immaturity of the immune system and the complex changing composition of the intestinal microbiome. This is compounded by the fact that the premature infant should ideally still be a developing fetus and has an immature intestinal tract. Because these complexities are beyond the scope of studies in single-cell cultures, animal models are absolutely essential to understand the mechanisms involved in the pathophysiology of NEC and the effects of inflammation on the immature intestinal tract...
February 2018: Seminars in Pediatric Surgery
https://www.readbyqxmd.com/read/29242832/persistence-of-supplemented-bifidobacterium-longum-subsp-infantis-evc001-in-breastfed-infants
#9
Steven A Frese, Andra A Hutton, Lindsey N Contreras, Claire A Shaw, Michelle C Palumbo, Giorgio Casaburi, Gege Xu, Jasmine C C Davis, Carlito B Lebrilla, Bethany M Henrick, Samara L Freeman, Daniela Barile, J Bruce German, David A Mills, Jennifer T Smilowitz, Mark A Underwood
Attempts to alter intestinal dysbiosis via administration of probiotics have consistently shown that colonization with the administered microbes is transient. This study sought to determine whether provision of an initial course of Bifidobacterium longum subsp. infantis (B. infantis) would lead to persistent colonization of the probiotic organism in breastfed infants. Mothers intending to breastfeed were recruited and provided with lactation support. One group of mothers fed B. infantis EVC001 to their infants from day 7 to day 28 of life (n = 34), and the second group did not administer any probiotic (n = 32)...
November 2017: MSphere
https://www.readbyqxmd.com/read/29241587/associations-between-infant-fungal-and-bacterial-dysbiosis-and-childhood-atopic-wheeze-in-a-nonindustrialized-setting
#10
Marie-Claire Arrieta, Andrea Arévalo, Leah Stiemsma, Pedro Dimitriu, Martha E Chico, Sofia Loor, Maritza Vaca, Rozlyn C T Boutin, Evan Morien, Mingliang Jin, Stuart E Turvey, Jens Walter, Laura Wegener Parfrey, Philip J Cooper, Brett Finlay
BACKGROUND: Asthma is the most prevalent chronic disease of childhood. Recently, we identified a critical window early in the life of both mice and Canadian infants during which gut microbial changes (dysbiosis) affect asthma development. Given geographic differences in human gut microbiota worldwide, we studied the effects of gut microbial dysbiosis on atopic wheeze in a population living in a distinct developing world environment. OBJECTIVE: We sought to determine whether microbial alterations in early infancy are associated with the development of atopic wheeze in a nonindustrialized setting...
November 30, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29228972/impact-of-prematurity-and-nutrition-on-the-developing-gut-microbiome-and-preterm-infant-growth
#11
Alex Grier, Xing Qiu, Sanjukta Bandyopadhyay, Jeanne Holden-Wiltse, Haeja A Kessler, Ann L Gill, Brooke Hamilton, Heidie Huyck, Sara Misra, Thomas J Mariani, Rita M Ryan, Lori Scholer, Kristin M Scheible, Yi-Horng Lee, Mary T Caserta, Gloria S Pryhuber, Steven R Gill
BACKGROUND: Identification of factors that influence the neonatal gut microbiome is urgently needed to guide clinical practices that support growth of healthy preterm infants. Here, we examined the influence of nutrition and common practices on the gut microbiota and growth in a cohort of preterm infants. RESULTS: With weekly gut microbiota samples spanning postmenstrual age (PMA) 24 to 46 weeks, we developed two models to test associations between the microbiota, nutrition and growth: a categorical model with three successive microbiota phases (P1, P2, and P3) and a model with two periods (early and late PMA) defined by microbiota composition and PMA, respectively...
December 11, 2017: Microbiome
https://www.readbyqxmd.com/read/29225146/microbial-diversity-within-the-airway-microbiome-in-chronic-pediatric-lung-diseases
#12
Andrea Hahn, Stephanie Warnken, Marcos Pérez-Losada, Robert J Freishtat, Keith A Crandall
The study of the airway microbiome in children is an area of emerging research, especially in relation to the role microbial diversity may play in acute and chronic inflammation. Three such pediatric airway diseases include cystic fibrosis, asthma, and chronic lung disease of prematurity. In cystic fibrosis, the presence of Pseudomonas spp. is associated with decreased microbial diversity. Decreasing microbial diversity is also associated with poor lung function. In asthma, early viral infections appear to drive changes in bacterial diversity which may be associated with asthma risk...
December 7, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29221568/nutritional-programming-by-glucocorticoids-in-breast-milk-targets-mechanisms-and-possible-implications
#13
REVIEW
Jonneke J Hollanders, Annemieke C Heijboer, Bibian van der Voorn, Joost Rotteveel, Martijn J J Finken
Vertical transmission of glucocorticoids via breast milk might pose a mechanism through which lactating women could prepare their infants for the postnatal environment. The primary source of breast-milk glucocorticoids is probably the systemic circulation. Research from our group showed that milk cortisol and cortisone concentrations follow the diurnal rhythm of maternal hypothalamus-pituitary-adrenal axis activity, with a higher abundance of cortisone compared to cortisol. Measurement of breast-milk glucocorticoid concentrations is challenging due to possible cross-reactivity with progestagens and sex steroids, which are severely elevated during pregnancy and after parturition...
August 2017: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29214047/high-resolution-profiling-of-the-gut-microbiome-reveals-the-extent-of-clostridium-difficile-burden
#14
Ninalynn Daquigan, Anna Maria Seekatz, K Leigh Greathouse, Vincent B Young, James Robert White
Microbiome profiling through 16S rRNA gene sequence analysis has proven to be a useful research tool in the study of C. difficile infection (CDI); however, CDI microbiome studies typically report results at the genus level or higher, thus precluding identification of this pathogen relative to other members of the gut microbiota. Accurate identification of C. difficile relative to the overall gut microbiome may be useful in assessments of colonization in research studies or as a prognostic indicator for patients with CDI...
2017: NPJ Biofilms and Microbiomes
https://www.readbyqxmd.com/read/29211629/report-of-the-fifth-european-expert-meeting-on-rotavirus-vaccination-eerovac-utrecht-the-netherlands-20-22-march-2017
#15
Marieke L A de Hoog, Timo Vesikari, Carlo Giaquinto, Hans-Iko Huppertz, Federico Martinon-Torres, Patricia Bruijning-Verhagen
The Fifth European Expert Meeting on Rotavirus Vaccination was convened in Utrecht, The Netherlands, in March 2017. The 2-day meeting included invited lectures as well as original oral and poster presentations and brought together experts from 21 countries. Summary findings of the meeting include: Rotavirus vaccination programmes in Europe have resulted in reductions of 60-90% in rotavirus outpatient visits and hospitalizations. Long term trends indicate this impact is sustained over the years. Herd effects, protecting unvaccinated children and neonates too young to be vaccinated have been observed in many European countries...
December 6, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29209311/codevelopment-of-microbiota-and-innate-immunity-and-the-risk-for-group-b-streptococcal-disease
#16
REVIEW
Julia Kolter, Philipp Henneke
The pathogenesis of neonatal late-onset sepsis (LOD), which manifests between the third day and the third month of life, remains poorly understood. Group B Streptococcus (GBS) is the most important cause of LOD in infants without underlying diseases or prematurity and the third most frequent cause of meningitis in the Western world. On the other hand, GBS is a common intestinal colonizer in infants. Accordingly, despite its adaption to the human lower gastrointestinal tract, GBS has retained its potential virulence and its transition from a commensal to a dangerous pathogen is unpredictable in the individual...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29190745/colonization-with-escherichia-coli-ec-25-protects-neonatal-rats-from-necrotizing-enterocolitis
#17
Debi M Thomas, Brandon Bell, Stephanie Papillon, Patrick Delaplain, Joanna Lim, Jamie Golden, Jordan Bowling, Jin Wang, Larry Wang, Anatoly V Grishin, Henri R Ford
Necrotizing enterocolitis (NEC) is a significant cause of morbidity and mortality in premature infants; yet its pathogenesis remains poorly understood. To evaluate the role of intestinal bacteria in protection against NEC, we assessed the ability of naturally occurring intestinal colonizer E. coli EC25 to influence composition of intestinal microbiota and NEC pathology in the neonatal rat model. Experimental NEC was induced in neonatal rats by formula feeding/hypoxia, and graded histologically. Bacterial populations were characterized by plating on blood agar, scoring colony classes, and identifying each class by sequencing 16S rDNA...
2017: PloS One
https://www.readbyqxmd.com/read/29186903/bacteriological-and-immunological-profiling-of-meconium-and-fecal-samples-from-preterm-infants-a-two-year-follow-up-study
#18
Marta Gómez, Laura Moles, Irene Espinosa-Martos, Gerardo Bustos, Willem M de Vos, Leónides Fernández, Juan M Rodríguez, Susana Fuentes, Esther Jiménez
An abnormal colonization pattern of the preterm gut may affect immune maturation and exert a long-term influence on the intestinal bacterial composition and host health. However, follow-up studies assessing the evolution of the fecal microbiota of infants that were born preterm are very scarce. In this work, the bacterial compositions of fecal samples, obtained from sixteen 2-year-old infants were evaluated using a phylogenetic microarray; subsequently, the results were compared with those obtained in a previous study from samples of meconium and feces collected from the same infants while they stayed in the neonatal intensive care unit (NICU)...
November 27, 2017: Nutrients
https://www.readbyqxmd.com/read/29184093/intrapartum-antibiotics-for-gbs-prophylaxis-alter-colonization-patterns-in-the-early-infant-gut-microbiome-of-low-risk-infants
#19
Jennifer C Stearns, Julia Simioni, Elizabeth Gunn, Helen McDonald, Alison C Holloway, Lehana Thabane, Andrea Mousseau, Jonathan D Schertzer, Elyanne M Ratcliffe, Laura Rossi, Michael G Surette, Katherine M Morrison, Eileen K Hutton
Early life microbial colonization and succession is critically important to healthy development with impacts on metabolic and immunologic processes throughout life. A longitudinal prospective cohort was recruited from midwifery practices to include infants born at full term gestation to women with uncomplicated pregnancies. Here we compare bacterial community succession in infants born vaginally, with no exposure to antibiotics (n = 53), with infants who were exposed to intrapartum antibiotic prophylaxis (IAP) for Group B Streptococcus (GBS; n = 14), and infants born by C-section (n = 7)...
November 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29180750/strain-resolved-analysis-of-hospital-rooms-and-infants-reveals-overlap-between-the-human-and-room-microbiome
#20
Brandon Brooks, Matthew R Olm, Brian A Firek, Robyn Baker, Brian C Thomas, Michael J Morowitz, Jillian F Banfield
Preterm infants exhibit different microbiome colonization patterns relative to full-term infants, and it is speculated that the hospital room environment may contribute to infant microbiome development. Here, we present a genome-resolved metagenomic study of microbial genotypes from the gastrointestinal tracts of infants and from the neonatal intensive care unit (NICU) room environment. Some strains detected in hospitalized infants also occur in sinks and on surfaces, and belong to species such as Staphylococcus epidermidis, Enterococcus faecalis, Pseudomonas aeruginosa, and Klebsiella pneumoniae, which are frequently implicated in nosocomial infection and preterm infant gut colonization...
November 27, 2017: Nature Communications
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