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Respiratory microbiota

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https://www.readbyqxmd.com/read/28741603/role-of-the-lung-microbiome-in-the-pathogenesis-of-chronic-obstructive-pulmonary-disease
#1
REVIEW
Lei Wang, Ke Hao, Ting Yang, Chen Wang
OBJECTIVE: The development of culture-independent techniques for microbiological analysis shows that bronchial tree is not sterile in either healthy or chronic obstructive pulmonary disease (COPD) individuals. With the advance of sequencing technologies, lung microbiome has become a new frontier for pulmonary disease research, and such advance has led to better understanding of the lung microbiome in COPD. This review aimed to summarize the recent advances in lung microbiome, its relationships with COPD, and the possible mechanisms that microbiome contributed to COPD pathogenesis...
July 24, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28733284/specific-signatures-of-the-gut-microbiota-and-increased-levels-of-butyrate-in-children-treated-with-fermented-cow-s-milk-containing-heat-killed-lactobacillus-paracasei-cba-l74
#2
Roberto Berni Canani, Francesca De Filippis, Rita Nocerino, Manolo Laiola, Lorella Paparo, Antonio Calignano, Carmen De Caro, Lorena Coretti, Lorenzo Chiariotti, Jack A Gilbert, Danilo Ercolini
We recently demonstrated that cow's milk fermented with the probiotic L.paracasei CBA L74 (FM-CBAL74) reduces the incidence of respiratory and gastrointestinal tract infections in young children attending school. This effect apparently derives from a complex regulation of non-immune and immune protective mechanisms. We investigated wheter FM-CBAL74 could regulate gut microbiota composition and butyrate production.We randomly selected 20 healthy children (12-48 months) from the previous randomized controlled trial, before (t0) and after 3 months (t3) of dietary treatment with FM-CBAL74 (FM), or placebo (PL)...
July 21, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28719637/microbiome-overview-in-swine-lungs
#3
Franciele Maboni Siqueira, Esteban Pérez-Wohlfeil, Fabíola Marques Carvalho, Oswaldo Trelles, Irene Silveira Schrank, Ana Tereza Ribeiro Vasconcelos, Arnaldo Zaha
Mycoplasma hyopneumoniae is the etiologic agent of swine enzootic pneumonia. However other mycoplasma species and secondary bacteria are found as inhabitants of the swine respiratory tract, which can be also related to disease. In the present study we have performed a total DNA metagenomic analysis from the lungs of pigs kept in a field condition, with suggestive signals of enzootic pneumonia and without any infection signals to evaluate the bacteria variability of the lungs microbiota. Libraries from metagenomic DNA were prepared and sequenced using total DNA shotgun metagenomic pyrosequencing...
2017: PloS One
https://www.readbyqxmd.com/read/28708872/nasopharyngeal-microbiota-in-infants-and-changes-during-viral-upper-respiratory-tract-infection-and-acute-otitis-media
#4
Tasnee Chonmaitree, Kristofer Jennings, Georgiy Golovko, Kamil Khanipov, Maria Pimenova, Janak A Patel, David P McCormick, Michael J Loeffelholz, Yuriy Fofanov
BACKGROUND: Interferences between pathogenic bacteria and specific commensals are known. We determined the interactions between nasopharyngeal microbial pathogens and commensals during viral upper respiratory tract infection (URI) and acute otitis media (AOM) in infants. METHODS: We analyzed 971 specimens collected monthly and during URI and AOM episodes from 139 infants. The 16S rRNA V4 gene regions were sequenced on the Illumina MiSeq platform. RESULTS: Among the high abundant genus-level nasopharyngeal microbiota were Moraxella, Haemophilus, and Streptococcus (3 otopathogen genera), Corynebacterium, Dolosigranulum, Staphylococcus, Acinetobacter, Pseudomonas, and Bifidobacterium...
2017: PloS One
https://www.readbyqxmd.com/read/28708417/association-of-antibiotics-airway-microbiome-and-inflammation-in-infants-with-cystic-fibrosis
#5
Jessica E Pittman, Kristine M Wylie, Kathryn Akers, Gregory A Storch, Joseph Hatch, Jane Quante, Katherine B Frayman, Nadeene Clarke, Miriam Davis, Stephen M Stick, Graham L Hall, Gregory Montgomery, Sarath Ranganathan, Stephanie D Davis, Thomas W Ferkol
RATIONALE: The underlying defect in the cystic fibrosis (CF) airway leads to defective mucociliary clearance and impaired bacterial killing, resulting in endobronchial infection and inflammation that contributes to progressive lung disease. Little is known about the respiratory microbiota in the early CF airway and its relationship to inflammation. OBJECTIVES: To examine the bacterial microbiota and inflammatory profiles in bronchoalveolar lavage fluid and oropharyngeal secretions in infants with CF...
July 14, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28706918/the-respiratory-microbiome-in-idiopathic-pulmonary-fibrosis
#6
REVIEW
Richard J Hewitt, Philip L Molyneaux
Idiopathic pulmonary fibrosis (IPF) is a progressive and fatal disease of unknown cause. Current evidence suggests that it arises in genetically susceptible individuals as a consequence of an aberrant wound-healing response following repetitive alveolar injury. Overt respiratory infection and immunosuppression carry a high mortality, while polymorphisms in genes related to epithelial integrity and host defence predispose to IPF. Recent advances in sequencing technologies have allowed the use of molecular microbial technologies to characterise the respiratory microbiota in patients with IPF...
June 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28705171/formula-diet-driven-microbiota-shifts-tryptophan-metabolism-from-serotonin-to-tryptamine-in-neonatal-porcine-colon%C3%AF
#7
Manish Kumar Saraf, Brian D Piccolo, Anne K Bowlin, Kelly E Mercer, Tanya LeRoith, Sree V Chintapalli, Kartik Shankar, Thomas M Badger, Laxmi Yeruva
BACKGROUND: The gut microbiota of breast-fed and formula-fed infants differ significantly, as do the risks for allergies, gut dysfunction, and upper respiratory tract infections. The connections between breast milk, various formulas, and the profiles of gut bacteria to these childhood illnesses, as well as the mechanisms underlying the effects, are not well understood. METHODS: We investigated distal colon microbiota by 16S RNA amplicon sequencing, morphology by histomorphometry, immune response by cytokine expression, and tryptophan metabolism in a pig model in which piglets were sow-fed, or fed soy or dairy milk-based formula from postnatal day (PND) 2 to 21...
July 14, 2017: Microbiome
https://www.readbyqxmd.com/read/28702305/increased-risk-of-pneumonia-in-residents-living-near-poultry-farms-does-the-upper-respiratory-tract-microbiota-play-a-role
#8
Lidwien A M Smit, Gert Jan Boender, Wouter A A de Steenhuijsen Piters, Thomas J Hagenaars, Elisabeth G W Huijskens, John W A Rossen, Marion Koopmans, Gonnie Nodelijk, Elisabeth A M Sanders, Joris Yzermans, Debby Bogaert, Dick Heederik
BACKGROUND: Air pollution has been shown to increase the susceptibility to community-acquired pneumonia (CAP). Previously, we observed an increased incidence of CAP in adults living within 1 km from poultry farms, potentially related to particulate matter and endotoxin emissions. We aim to confirm the increased risk of CAP near poultry farms by refined spatial analyses, and we hypothesize that the oropharyngeal microbiota composition in CAP patients may be associated with residential proximity to poultry farms...
2017: Pneumonia
https://www.readbyqxmd.com/read/28690602/geography-ethnicity-or-subsistence-specific-variations-in-human-microbiome-composition-and-diversity
#9
REVIEW
Vinod K Gupta, Sandip Paul, Chitra Dutta
One of the fundamental issues in the microbiome research is characterization of the healthy human microbiota. Recent studies have elucidated substantial divergences in the microbiome structure between healthy individuals from different race and ethnicity. This review provides a comprehensive account of such geography, ethnicity or life-style-specific variations in healthy microbiome at five major body habitats-Gut, Oral-cavity, Respiratory Tract, Skin, and Urogenital Tract (UGT). The review focuses on the general trend in the human microbiome evolution-a gradual transition in the gross compositional structure along with a continual decrease in diversity of the microbiome, especially of the gut microbiome, as the human populations passed through three stages of subsistence like foraging, rural farming and industrialized urban western life...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28684633/metaproteomics-reveals-functional-differences-in-intestinal-microbiota-development-of-preterm-infants
#10
Romy D Zwittink, Diny van Zoeren-Grobben, Rocio Martin, Richard A van Lingen, Liesbeth J Groot Jebbink, Sjef Boeren, Ingrid B Renes, Ruurd M van Elburg, Clara Belzer, Jan Knol
Development of the gastrointestinal tract and immune system can be modulated by the gut microbiota. Establishment of the intestinal microbiota, in its turn, is affected by host- and environmental factors. As such, development of the gut microbiota is greatly impacted in preterm infants, who have an immature gut and are exposed to factors like hospitalisation, caesarean section, antibiotics, and respiratory support.</p> <p>Design: We analysed faecal microbiota composition and activity of ten preterm infants (gestational age 25-30 weeks; birthweight 630-1750 gram) during the first six postnatal weeks through metaproteomics (LC-MS/MS) and 16S-rRNA gene sequencing...
July 6, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/28665684/maturation-of-the-infant-respiratory-microbiota-environmental-drivers-and-health-consequences-a-prospective-cohort-study
#11
Astrid A T M Bosch, Wouter A A de Steenhuijsen Piters, Marlies A van Houten, Mei Ling J N Chu, Giske Biesbroek, Jolanda Kool, Paula Pernet, Pieter-Kees C M de Groot, Marinus J C Eijkemans, Bart J F Keijser, Elisabeth A M Sanders, Debby Bogaert
RATIONALE: Perinatal and postnatal influences are presumed important drivers of the early-life respiratory microbiome composition. We hypothesized that the respiratory microbiome composition and development in infancy is affecting microbiome stability and thereby resilience against respiratory tract infections (RTIs) over time. OBJECTIVES: To investigate common environmental drivers, including birth mode, feeding type, antibiotic exposure and crowding conditions, in relation to respiratory tract microbiota maturation and stability, and consecutive risk of RTIs over the first year of life...
June 30, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28661199/respiratory-microbiota-and-lower-respiratory-tract-disease
#12
Miguel Lanaspa, Quique Bassat, Marcia Melo Medeiros, Camen Muñoz-Almagro
The respiratory airways harbor a complex succession of ecological niches with distinct but related bacterial communities. Particular challenges of respiratory microbiome research have led to limited scientific output compared to other human microbiomes. Areas covered: In this review, we summarize the current state of knowledge of the bacterial respiratory microbiome, with a particular focus on associations between the respiratory microbiome and lower respiratory tract conditions. Expert commentary: There is growing evidence that the respiratory microbiome is associated with lower respiratory infectious diseases and related conditions...
June 29, 2017: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/28657170/the-past-decade-in-bench-research-into-pulmonary-infectious-diseases-what-do-clinicians-need-to-know
#13
REVIEW
Simon Finch, Holly R Keir, Alison J Dicker, James D Chalmers
Respiratory infections are primarily treated with antibiotics, drugs that are mostly inexpensive and have been widely available since the 1940s and 1950s. Nevertheless, despite antibiotics, the burden of disease in pneumonia, bronchiectasis, cystic fibrosis, COPD and rare respiratory infections remains exceptionally high. There is an urgent need for translational studies to develop new treatments or new biomarkers to improve outcomes in these conditions. The 'translational gaps' between bench science and clinical practice are particularly challenging in respiratory infections...
June 28, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28646967/the-respiratory-microbiome-and-respiratory-infections
#14
Stefan A Unger, Debby Bogaert
Despite advances over the past ten years lower respiratory tract infections still comprise around a fifth of all deaths worldwide in children under five years of age with the majority in low- and middle-income countries. Known risk factors for severe respiratory infections and poor chronic respiratory health do not fully explain why some children become sick and others do not. The respiratory tract hosts bacteria that can cause respiratory infections but also normal commensal bacteria. Together, this microbial population is called the microbiome...
June 2017: Journal of Infection
https://www.readbyqxmd.com/read/28645257/relationship-between-nasopharyngeal-and-bronchoalveolar-microbial-communities-in-clinically-healthy-feedlot-cattle
#15
Mohamed M Zeineldin, James F Lowe, Elsbeth D Grimmer, Maria R C de Godoy, Mohamed M Ghanem, Yassein M Abd El-Raof, Brian M Aldridge
BACKGROUND: The importance of upper airway structure in the susceptibility of the lower respiratory tract to colonization with potential pathogens is well established. With the advent of rapid, high throughput, next generation sequencing, there is a growing appreciation of the importance of commensal microbial populations in maintaining mucosal health, and a realization that bacteria colonize anatomical locations that were previously considered to be sterile. While upper respiratory tract microbial populations have been described, there are currently no published studies describing the normal microbial populations of the bovine lower respiratory tract...
June 23, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28643622/lung-microbiota-and-its-impact-on-the-mucosal-immune-phenotype
#16
Benjamin G Wu, Leopoldo N Segal
The use of culture-independent techniques has allowed us to appreciate that the upper and lower respiratory tract contain a diverse community of microbes in health and disease. Research has only recently explored the effects of the microbiome on the host immune response. The exposure of the human body to the bacterial environment is an important factor for immunological development; thus, the interaction between the microbiome and its host is critical to understanding the pathogenesis of disease. In this article, we discuss the mechanisms that determine the composition of the airway microbiome and its effects on the host immune response...
June 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28638806/in-vitro-increased-respiratory-activity-of-selected-oral-bacteria-may-explain-competitive-and-collaborative-interactions-in-the-oral-microbiome
#17
Emma Hernandez-Sanabria, Vera Slomka, Esteban R Herrero, Frederiek-Maarten Kerckhof, Lynette Zaidel, Wim Teughels, Nico Boon
Understanding the driving forces behind the shifts in the ecological balance of the oral microbiota will become essential for the future management and treatment of periodontitis. As the use of competitive approaches for modulating bacterial outgrowth is unexplored in the oral ecosystem, our study aimed to investigate both the associations among groups of functional compounds and the impact of individual substrates on selected members of the oral microbiome. We employed the Phenotype Microarray high-throughput technology to analyse the microbial cellular phenotypes of 15 oral bacteria...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28604843/alcohol-associated-intestinal-dysbiosis-impairs-pulmonary-host-defense-against-klebsiella-pneumoniae
#18
Derrick R Samuelson, Judd E Shellito, Vincent J Maffei, Eric D Tague, Shawn R Campagna, Eugene E Blanchard, Meng Luo, Christopher M Taylor, Martin J J Ronis, Patricia E Molina, David A Welsh
Chronic alcohol consumption perturbs the normal intestinal microbial communities (dysbiosis). To investigate the relationship between alcohol-mediated dysbiosis and pulmonary host defense we developed a fecal adoptive transfer model, which allows us to investigate the impact of alcohol-induced gut dysbiosis on host immune response to an infectious challenge at a distal organ, independent of prevailing alcohol use. Male C57BL/6 mice were treated with a cocktail of antibiotics (ampicillin, gentamicin, neomycin, vancomycin, and metronidazole) via daily gavage for two weeks...
June 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28602021/evaluation-of-mollicutes-microorganisms-in-respiratory-disease-of-cattle-and-their-relationship-to-clinical-signs
#19
G Tortorelli, N Carrillo Gaeta, B L Mendonça Ribeiro, L Miranda Marques, J Timenetsky, L Gregory
BACKGROUND: Bovine respiratory disease (BRD) is an important problem in cattle production that is responsible for economic losses in dairy herds. Mycoplasma spp. are described as an important etiological agent of BRD. HYPOTHESIS: To evaluate the occurrence of the most important mycoplasmas in the lower respiratory tract of healthy and BRD cattle in relationship to clinical signs of BRD. ANIMALS: Sixty young dairy cattle were classified as healthy (n = 32) or cattle showing clinical signs of BRD (n = 28)...
July 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28594919/weaned-beef-calves-fed-selenium-biofortified-alfalfa-hay-have-an-enriched-nasal-microbiota-compared-with-healthy-controls
#20
Jean A Hall, Anitha Isaiah, Charles T Estill, Gene J Pirelli, Jan S Suchodolski
Selenium (Se) is an essential trace mineral important for immune function and overall health of cattle. The nasopharyngeal microbiota in cattle plays an important role in overall respiratory health, especially when stresses associated with weaning, transport, and adaptation to a feedlot affect the normal respiratory defenses. Recent evidence suggests that cattle diagnosed with bovine respiratory disease complex have significantly less bacterial diversity. The objective of this study was to determine whether feeding weaned beef calves Se-enriched alfalfa (Medicago sativa) hay for 9 weeks in a preconditioning program prior to entering the feedlot alters nasal microbiota...
2017: PloS One
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