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Infant microbiota

Zhi-Hui Zou, Dong Liu, Hong-Dong Li, Dan-Ping Zhu, Yu He, Ting Hou, Jia-Lin Yu
BACKGROUND: To explore the influences of prenatal antibiotic exposure, the intensity of prenatal and postnatal antibiotic exposure on gut microbiota of preterm infants and whether gut microbiota and drug resistant strains in the neonatal intensive care unit (NICU) over a defined period are related. METHODS: Among 28 preterm infants, there were two groups, the PAT (prenatal antibiotic therapy) group (12 cases), and the PAF (prenatal antibiotic free) group (12 cases)...
March 19, 2018: Annals of Clinical Microbiology and Antimicrobials
Valerie J Flaherman, Nicole R Narayan, Dennis Hartigan-O'Connor, Michael D Cabana, Charles E McCulloch, Ian M Paul
OBJECTIVE: To determine whether using 10 mL formula after each breastfeeding before copious maternal milk production affects breastfeeding duration, readmission, and intestinal microbiota through 1 month of age. STUDY DESIGN: In this randomized controlled trial, we enrolled 164 exclusively breastfeeding newborns, 24-72 hours old, whose weight loss was ≥75th percentile for age, and whose mothers had not yet begun mature milk production. Enrolled newborns were assigned randomly to either supplement breastfeeding with early limited formula (ELF), 10 mL of formula after each breastfeeding stopped at the onset of copious maternal milk production (intervention), or to continue exclusive breastfeeding (control)...
March 13, 2018: Journal of Pediatrics
James Butcher, Sharon Unger, Jennifer Li, Nicole Bando, Guillaume Romain, Jane Francis, Walid Mottawea, David Mack, Alain Stintzi, Deborah L O'Connor
Background: Very-low-birth-weight (VLBW; born weighing <1500 g) infant feeding with mother's own milk (mother's milk) is associated with numerous beneficial health outcomes. Several interventions, including the prophylactic use of probiotics, are being adopted to promote a gastrointestinal microbiota favorable to the gut health of VLBW infants. An improved understanding of the microbiota that results from mother's milk feeding would therefore facilitate progress in this field. Objective: A preplanned primary objective of this research was to characterize the development of the gut microbiota in exclusively mother's milk-fed VLBW infants and describe the reference taxonomic profile that results from mother's milk feeding...
March 1, 2018: Journal of Nutrition
Joaquin Escribano, Natalia Ferré, Mariona Gispert-Llaurado, Veronica Luque, Carmen Rubio-Torrents, Marta Zaragoza-Jordana, Isabel Polanco, Francisco M Codoñer, Empar Chenoll, Mireia Morera, Jose Antonio Moreno Muñoz, Montserrat Rivero, Ricardo Closa-Monasterolo
BACKGROUND: Intestinal microbiota of breast-fed infants is plenty of beneficial bifidobacteria. We aimed to determine whether an infant formula supplemented with probiotic Bifidobacterium longum subsp. infantis CECT7210 (B. infantis IM1®) is effective at reducing diarrhoea incidence in healthy term infants. METHODS: Double-blinded, randomized, multicentre, controlled clinical trial, where formula-fed infants (<3 months) received an infant formula supplemented (Probiotic) or not (Control) with 107 cfu/g of B...
March 14, 2018: Pediatric Research
Terhi Tapiainen, Niko Paalanne, Mysore V Tejesvi, Pirjo Riikola M, Katja Korpela, Tytti Pokka, Jarmo Salo, Tuula Kaukola, Anna Maria Pirttilä, Matti Uhari, Marjo Renko
BACKGROUND: Meconium is formed before birth and may reflect the microbiome of the fetus. To test our hypothesis, we investigated whether maternal factors during pregnancy, such as biodiversity of the living environment, influence the microbiome of the first stool more than immediate perinatal factors. METHODS: We recruited 218 consecutive newborn infants from one hospital. Regions of the bacterial 16S rRNA gene were sequenced to characterize the microbiomes of the first-pass meconium samples (N=212)...
March 14, 2018: Pediatric Research
Mengxia Wang, Yongxiong Chen, Yuanyuan Wang, Yuan Li, Haihui Zheng, Fangli Ma, ChungWah Ma, Xiaojun Zhang, Biyu Lu, Zhiyong Xie, Qiongfeng Liao
Weaning is an essential and important event for infants and rodent animals, and the dietary supplementation plays a crucial role in regulating the composition and function of gut microbiota in the initial period after weaning. In this study, we investigated the potential effects of two probiotics along with three polysaccharides (PP) in weaned rats. Male SD rats, 21 days of age, were divided into two groups: one group was administered with PP for four weeks and the other was not. Body weight, food intake, gut epithelial barrier function, digestive enzyme activities, and the composition and function of gut microbiota were analyzed...
March 9, 2018: Food & Function
Takako Osaki, Cynthia Zaman, Hideo Yonezawa, Yingsong Lin, Masumi Okuda, Eriko Nozaki, Fuhito Hojo, Satoshi Kurata, Tomoko Hanawa, Shogo Kikuchi, Shigeru Kamiya
Helicobacter pylori is a causative pathogen of chronic gastritis, gastric ulcer disease, and gastric cancer. Humans are known to be a natural host for H. pylori and tend to acquire the pathogen before the age of 5 years. The infection may then persist lifelong if eradication therapy is not applied. One of the modes of transmission of H. pylori is between family members, and therefore, the presence of infected family members is an important risk factor in children. However, other environmental factors have not been fully analyzed...
2018: Frontiers in Immunology
Lisa F Stinson, Jeffrey A Keelan, Matthew S Payne
The establishment of human gut microbiota commences initially in utero . Meconium-the first fecal material passed after birth-can be used to study fetal gut contents; however, processing meconium samples for microbiome studies presents significant technical challenges. Meconium hosts a low biomass microbiome, is tar-like in texture and contains high concentrations of PCR inhibitors. This study aimed to evaluate four different DNA extraction methods to elucidate the most effective method for bacterial DNA recovery and sequencing analysis from first-pass meconium...
2018: Frontiers in Microbiology
Charitharth Vivek Lal, Nelida Olave, Colm Travers, Gabriel Rezonzew, Kalsang Dolma, Alexandra Simpson, Brian Halloran, Zubair Aghai, Pragnya Das, Nirmal Sharma, Xin Xu, Kristopher Genschmer, Derek Russell, Tomasz Szul, Nengjun Yi, J Edwin Blalock, Amit Gaggar, Vineet Bhandari, Namasivayam Ambalavanan
Premature infants are at high risk for developing bronchopulmonary dysplasia (BPD), characterized by chronic inflammation and inhibition of lung development, which we have recently identified as being modulated by microRNAs (miRNAs) and alterations in the airway microbiome. Exosomes and exosomal miRNAs may regulate cell differentiation and tissue and organ development. We discovered that tracheal aspirates from infants with severe BPD had increased numbers of, but smaller, exosomes compared with term controls...
March 8, 2018: JCI Insight
Elita Jauneikaite, Georgia Kapatai, Frances Davies, Ioana Gozar, Juliana Coelho, Kathleen B Bamford, Benedetto Simone, Lipi Begum, Shannon Katiyo, Bharat Patel, Peter Hoffman, Theresa Lamagni, Eimear T Brannigan, Alison Holmes, Tokozani Kadhani, Tracey Galletly, Kate Martin, Hermione Lyall, Yimmy Chow, Sunit Godambe, Victoria Chalker, Shiranee Sriskandan
Background: Invasive Group B streptococcus (GBS) is a major cause of serious neonatal infection. Current strategies to reduce early onset GBS disease have no impact on late onset disease (LOD). Although GBS is a normal part of the enteric microbiota in healthy term infants, LOD cases arising in the neonatal intensive care unit setting raise questions about mode of acquisition. Methods: Enhanced surveillance for any case of late onset GBS sepsis admitted to a level 3, 24-bed neonatal intensive care unit over a 2 year period was instituted following a cluster of four cases...
March 2, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
C A González-Bermúdez, R López-Nicolás, P Peso-Echarri, C Frontela-Saseta, C Martínez-Graciá
Infant microbiota has to progress from an almost sterile to a complex and varied community, so the main objective of this work was to evaluate the effect of three thickening ingredients on infant microbiota, as well as their in vitro gut fermentability. Experiments were performed using fresh faecal samples from healthy donors of 2-3 months of age. Stabilised stool samples were injected into Wheaton serum bottles containing pre-reduced MBM and 1% (w/v) fermentation substrates (locust bean gum, LBG; maize hydroxypropylated distarch phosphate, Mhdp; and pre-gelatinized rice starch, gRS)...
March 6, 2018: Food & Function
Gianluca Lista, Fabio Meneghin, Ilia Bresesti, Francesca Castoldi
The development of a proper neonatal microbiota is of great importance, especially for the effects that dysbiosis has in acute and chronic diseases' onset. The microbiota, particularly the intestinal one, plays a crucial role in maintaining the health of the host, preventing colonization by pathogenic bacteria and significantly influencing the development and maturation of a normal gastrointestinal mucosal immunity. Several factors may interfere with the physiological development of microbiota, such as diseases during pregnancy, type of delivery, maternal nutrition, type of neonatal feeding, use of antibiotics, exposition to hospital environment (e...
December 22, 2017: La Pediatria Medica e Chirurgica: Medical and Surgical Pediatrics
Anuradha Ravi, Ekaterina Avershina, Inga Leena Angell, Jane Ludvigsen, Prashanth Manohar, Sumathi Padmanaban, Ramesh Nachimuthu, Lars Snipen, Knut Rudi
Use of the 16S rRNA gene in microbiota studies is limited by the lack of taxonomic and functional resolution. High resolution analyses are particularly important for understanding transmission and persistence of bacteria. The aim of our work was therefore to compare a novel reduced metagenome sequencing (RMS) approach with 16S rRNA gene sequencing to determine both the metagenome genetic diversity and the mother-to-child sharing of the microbiota in a cohort of 17 mother-child pairs. We found that although both approaches gave comparable results with respect to sample separation and taxonomy, RMS gave higher resolution and the potential for genomic-/functional assignment...
March 1, 2018: Journal of Microbiological Methods
Kieran James, Mary O'Connell Motherway, Christophe Penno, Rebecca Louise O'Brien, Douwe van Sinderen
Bifidobacterial carbohydrate metabolism has been studied in considerable detail for a variety of both plant and human-derived glycans, particularly involving the bifidobacterial prototype Bifidobacterium breve UCC2003. We recently elucidated the metabolic pathways by which the<u>h</u>uman<u>m</u>ilk<u>o</u>ligosaccharide (HMO) constituents lacto-N-tetraose (LNT), lacto-N-neotetraose (LNnT) and lacto-N-biose (LNB) are utilized by B. breve UCC2003. However, to date no work has been carried out on the regulatory mechanisms that control expression of the genetic loci involved in these HMO metabolic pathways...
March 2, 2018: Applied and Environmental Microbiology
Noelia Martínez, Roberto Luque, Christian Milani, Marco Ventura, Oscar Bañuelos, Abelardo Margolles
Bifidobacteria are mutualistic intestinal bacteria and their presence in the human gut has been associated with health-promoting activities. The presence of antibiotic resistance genes in this genus is controversial, since, although bifidobacteria are non-pathogenic microorganisms, they could serve as reservoirs of resistance for intestinal pathogens. However, until now, few antibiotic resistance determinants have been functionally characterized in this genus. In this work, we show that Bifidobacterium breve CECT7263 displays atypical resistance to erythromycin and clindamycin...
March 2, 2018: Applied and Environmental Microbiology
Giusy Ranucci, Vittoria Buccigrossi, Eleonora Borgia, Daniela Piacentini, Federica Visentin, Luigi Cantarutti, Paola Baiardi, Mariagrazia Felisi, Maria Immacolata Spagnuolo, Stefania Zanconato, Eugenio Baraldi, Carlo Giaquinto, Alfredo Guarino
BACKGROUND: Early nutrition affects the risk of atopy and infections through modifications of intestinal microbiota. The Prebiotics in the Prevention of Atopy (PIPA) study was a 24-month randomised, double-blind, placebo-controlled trial. It aimed to evaluate the effects of a galacto-oligosaccharide/polydextrose (GOS/PDX)-formula (PF) on atopic dermatitis (AD) and common infections in infants who were born to atopic parents and to investigate the relationship among early nutrition, gut microbiota and clinical outcomes...
March 1, 2018: Nutrients
Alla Splichalova, Vera Slavikova, Zdislava Splichalova, Igor Splichal
Preterm infants born with immature organ systems, which can impede normal development, can also be highly sensitive to different biological and/or environmental factors. Animal models could aid in investigating and understanding the effects of different conditions on the health of these immunocompromised infants. The epitheliochorial placentation of the pig prevents the prenatal transfer of protective colostral immunoglobulins. Surgical colostrum-deprived piglets are free of maternal immunoglobulins, and the cells that are normally provided via colostrum...
2018: Frontiers in Immunology
Martin Glatz, Jay-Hyun Jo, Elizabeth A Kennedy, Eric C Polley, Julia A Segre, Eric L Simpson, Heidi H Kong
BACKGROUND: Emollients are a mainstay of treatment in atopic dermatitis (AD), a disease distinguished by skin bacterial dysbiosis. However, changes in skin microbiota when emollients are used as a potential AD preventative measure in infants remain incompletely characterized. RESULTS: We compared skin barrier parameters, AD development, and bacterial 16S ribosomal RNA gene sequences of cheek, dorsal and volar forearm samples from 6-month-old infants with a family history of atopy randomized to receive emollients (n = 11) or no emollients (controls, n = 12)...
2018: PloS One
Daniel Johannes Cornelis Berkhout, Hendrik Johannes Niemarkt, Nanne Klaas de Boer, Marc Alexander Benninga, Timotheüs Gualtherus Jacob de Meij
Although the exact pathophysiological mechanisms of both necrotizing enterocolitis (NEC) and late-onset sepsis (LOS) in preterm infants are yet to be elucidated, evidence is emerging that the gut microbiota plays a key role in their pathophysiology. Areas covered: In this review, initial microbial colonization and factors influencing microbiota composition are discussed. For both NEC and LOS, an overview of studies investigating preclinical alterations in gut microbiota composition and fecal volatile organic compounds (VOCs) is provided...
February 28, 2018: Expert Review of Gastroenterology & Hepatology
A Peirotén, J L Arqués, M Medina, E Rodríguez-Mínguez
Importance of bifidobacteria as part of the infant intestinal microbiota has been highlighted. Their acquisition is influenced by the mode of birth and the feed regime afterwards, with a special role of the maternal microbiota. The presence of the same shared bifidobacterial strains between breast milk and infant faeces in 14 mother-infant pairs was assessed by means of pulsed-field gel electrophoresis (PFGE) genotyping. Four shared strains of Bifidobacterium breve (2), Bifidobacterium longum subsp. infantis and B...
February 27, 2018: Beneficial Microbes
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