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Vaginal microbiota

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https://www.readbyqxmd.com/read/29776928/enrichment-of-clinically-relevant-organisms-in-spontaneous-preterm-delivered-placenta-and-reagent-contamination-across-all-clinical-groups-in-a-large-uk-pregnancy-cohort
#1
Lydia J Leon, Ronan Doyle, Ernest Diez-Benavente, Taane G Clark, Nigel Klein, Philip Stanier, Gudrun E Moore
In this study differences in the placental microbiota of term and preterm deliveries from a large UK pregnancy cohort were studied using 16S targeted amplicon sequencing. The impact of contamination from DNA extraction, PCR reagents, as well as those from delivery itself were also examined. A total of 400 placental samples from 256 singleton pregnancies were analysed and differences investigated between spontaneous preterm, non-spontaneous preterm, and term delivered placenta. DNA from recently delivered placenta was extracted, and screening for bacterial DNA was carried out using targeted sequencing of the 16S rRNA gene on the Illumina MiSeq platform...
May 18, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29772525/vaginal-microbiota-dysmicrobism-and-role-of-biofilm-forming-bacteria
#2
Giuseppina Campisciano, Nunzia Zanotta, Vincenzo Petix, Lucia Corich, Francesco De Seta, Manola Comar
Bacterial vaginosis involves the presence of a polymicrobial biofilm on the vaginal epithelium, guaranteeing immune escape and spread of antibiotic resistance. To spot known biofilm-forming bacteria, we profiled the vaginal microbiome of sixty-four symptomatic women suffering from a different grade of vaginal disorders and sixty asymptomatic healthy women. Specific microbial profiles distinguished symptomatic from asymptomatic women and characterized the grade of dysmicrobism within the symptomatic group. Lactobacillus crispatus and iners predominated on the healthy vaginal mucosa, while Lactobacillus gasseri predominated in the intermediate dysmicrobism...
June 1, 2018: Frontiers in Bioscience (Elite Edition)
https://www.readbyqxmd.com/read/29765068/linking-cervicovaginal-immune-signatures-hpv-and-microbiota-composition-in-cervical-carcinogenesis-in-non-hispanic-and-hispanic-women
#3
Paweł Łaniewski, Dominique Barnes, Alison Goulder, Haiyan Cui, Denise J Roe, Dana M Chase, Melissa M Herbst-Kralovetz
While high-risk human papillomavirus (HPV) infection is a well-established risk factor for cervical cancer, there are likely other factors within the local microenvironment that contribute to cervical carcinogenesis. Here we investigated relationships between HPV, vaginal pH, vaginal microbiota (VMB) composition, level of genital immune mediators and severity of cervical neoplasm. We enrolled women with low- and high-grade cervical dysplasia (LGD, HGD), invasive cervical carcinoma (ICC), and healthy controls...
May 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29761040/viromes-of-one-year-old-infants-reveal-the-impact-of-birth-mode-on-microbiome-diversity
#4
Angela McCann, Feargal J Ryan, Stephen R Stockdale, Marion Dalmasso, Tony Blake, C Anthony Ryan, Catherine Stanton, Susan Mills, Paul R Ross, Colin Hill
Establishing a diverse gut microbiota after birth is being increasingly recognised as important for preventing illnesses later in life. It is well established that bacterial diversity rapidly increases post-partum; however, few studies have examined the infant gut virome/phageome during this developmental period. We performed a metagenomic analysis of 20 infant faecal viromes at one year of age to determine whether spontaneous vaginal delivery (SVD) or caesarean section (CS) influenced viral composition. We find that birth mode results in distinctly different viral communities, with SVD infants having greater viral and bacteriophage diversity...
2018: PeerJ
https://www.readbyqxmd.com/read/29760169/dysbiosis-of-maternal-and-neonatal-microbiota-associated-with-gestational-diabetes-mellitus
#5
Jinfeng Wang, Jiayong Zheng, Wenyu Shi, Nan Du, Xiaomin Xu, Yanming Zhang, Peifeng Ji, Fengyi Zhang, Zhen Jia, Yeping Wang, Zhi Zheng, Hongping Zhang, Fangqing Zhao
OBJECTIVE: The initial colonisation of the human microbiota and the impact of maternal health on neonatal microbiota at birth remain largely unknown. The aim of our study is to investigate the possible dysbiosis of maternal and neonatal microbiota associated with gestational diabetes mellitus (GDM) and to estimate the potential risks of the microbial shift to neonates. DESIGN: Pregnant women and neonates suffering from GDM were enrolled and 581 maternal (oral, intestinal and vaginal) and 248 neonatal (oral, pharyngeal, meconium and amniotic fluid) samples were collected...
May 14, 2018: Gut
https://www.readbyqxmd.com/read/29744039/has-knowledge-of-the-vaginal-microbiome-altered-approaches-to-health-and-disease
#6
REVIEW
Gregor Reid
Sixteen years ago, when we published the first molecular characterization of the vaginal microbiota, little did we know the vast numbers of species that would be detected in this niche. As exciting as these discoveries have been, what have they and more recent advances contributed to how vaginal health and disease are managed? This review provides a brief discussion of the potential, but so far limited, applications that have arisen from microbiome research. Calls for innovation have been made before but to little avail...
2018: F1000Research
https://www.readbyqxmd.com/read/29742464/gastrointestinal-microbiota-and-mucosal-immune-gene-expression-in-neonatal-pigs-reared-in-a-cross-fostering-model
#7
Nidia Maradiaga, Brian Aldridge, Mohamed Zeineldin, James Lowe
Cross fostering is employed to equalize the number of piglet between litters ensuring colostrum intake for their survival and growth. However, little is known about the impact of cross fostering on the intestinal microbiota and mucosal immune gene expression of the neonatal pig. The objective of this study was to determine the influence of maternal microbial communities on the gastrointestinal (GI) microbiota and mucosal immune gene expression in young pigs reared in a cross-fostering model. Piglets were given high quality colostrum from birth dam or foster dam upon birth...
May 6, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29729331/the-vaginal-microbiota-and-its-association-with-human-papillomavirus-chlamydia-trachomatis-neisseria-gonorrhea-and-mycoplasma-genitalium-infections-a-systematic-review-and-meta-analysis
#8
REVIEW
Jeanne Tamarelle, Anne C M Thiébaut, Bertille de Barbeyrac, Cécile Bébéar, Jacques Ravel, Elisabeth Delarocque-Astagneau
OBJECTIVES: The vaginal microbiota may modulate susceptibility to Human papillomavirus, Chlamydia trachomatis, Neisseria gonorrhea and Mycoplasma genitalium infections. The objective of this meta-analysis was to evaluate the association between these infections and the vaginal microbiota. METHODS: The search (2000-2016) yielded 1054 articles, of which 39 articles meeting the inclusion criteria were analyzed. The vaginal microbiota was dichotomized into high-Lactobacillus vaginal microbiota (HL-VMB) and low-Lactobacillus vaginal microbiota (LL-VMB), using either Nugent score, Amsel's criteria, presence of clue cells or gene sequencing...
May 2, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29728382/phylotype-level-profiling-of-lactobacilli-in-highly-complex-environments-by-means-of-an-its-based-metagenomic-approach
#9
Christian Milani, Sabrina Duranti, Marta Mangifesta, Gabriele Andrea Lugli, Francesca Turroni, Leonardo Mancabelli, Alice Viappiani, Rosaria Anzalone, Giulia Alessandri, Maria Cristina Ossiprandi, Douwe van Sinderen, Marco Ventura
The genus Lactobacillus is a widespread taxon, members of which are highly relevant to functional and fermented foods, while they are also commonly present in host-associated gut and vaginal microbiota. Substantial efforts have been undertaken to disclose the genetic repertoire of all members of the genus Lactobacillus , yet their species-level profiling in complex matrices is still undeveloped due to the poor phylotype resolution of profiling approaches based on the 16S rRNA gene. To overcome this limitation, an ITS-based profiling method was developed to accurately profile lactobacilli at species-level...
May 4, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29724017/low-maternal-microbiota-sharing-across-gut-breast-milk-and-vagina-as-revealed-by-16s-rrna-gene-and-reduced-metagenomic-sequencing
#10
Ekaterina Avershina, Inga Leena Angell, Melanie Simpson, Ola Storrø, Torbjørn Øien, Roar Johnsen, Knut Rudi
The maternal microbiota plays an important role in infant gut colonization. In this work we have investigated which bacterial species are shared across the breast milk, vaginal and stool microbiotas of 109 women shortly before and after giving birth using 16S rRNA gene sequencing and a novel reduced metagenomic sequencing (RMS) approach in a subgroup of 16 women. All the species predicted by the 16S rRNA gene sequencing were also detected by RMS analysis and there was good correspondence between their relative abundances estimated by both approaches...
May 1, 2018: Genes
https://www.readbyqxmd.com/read/29705211/assessment-of-microbiota-host-interactions-at-the-vaginal-mucosa-interface
#11
REVIEW
Pamela Pruski, Holly V Lewis, Yun S Lee, Julian R Marchesi, Phillip R Bennett, Zoltan Takats, David A MacIntyre
There is increasing appreciation of the role that vaginal microbiota play in health and disease throughout a woman's lifespan. This has been driven partly by molecular techniques that enable detailed identification and characterisation of microbial community structures. However, these methods do not enable assessment of the biochemical and immunological interactions between host and vaginal microbiota involved in pathophysiology. This review examines our current knowledge of the relationships that exist between vaginal microbiota and the host at the level of the vaginal mucosal interface...
April 26, 2018: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/29704918/microbiota-drug-interactions-impact-on-metabolism-and-efficacy-of-therapeutics
#12
REVIEW
Ellen M Wilkinson, Zehra Esra Ilhan, Melissa M Herbst-Kralovetz
The microbiome not only represents a vital modifier of health and disease, but is a clinically important drug target. Therefore, study of the impact of the human microbiome on drug metabolism, toxicity and efficacy is urgently needed. This review focuses on gut and vaginal microbiomes, and the effect of those microbiomes or components thereof on the pharmacokinetics of specific chemotherapeutic agents, immunotherapies, anti-inflammatory and antimicrobial drugs. In some cases, the presence of specific bacterial species within the microbiome can alter the metabolism of certain drugs, such as chemotherapeutic agents and antiviral drugs...
June 2018: Maturitas
https://www.readbyqxmd.com/read/29692813/prevalence-of-bacterial-vaginosis-and-its-association-with-risk-factors-among-nonpregnant-women-a-hospital-based-study
#13
Eliza Ranjit, Bijendra Raj Raghubanshi, Smrity Maskey, Pramila Parajuli
Bacterial vaginosis (BV) is an ecological imbalance of the vaginal microbiota affecting mostly women of reproductive age group. This study was carried out among 160 nonpregnant women registered at the Outpatient Department of Gynaecology/Obstetrics of KIST Medical College Teaching Hospital, Imadol, Lalitpur, Nepal, from November 2014 to May 2015. The aim of the study was to assess the association of the risk factors with BV and analyze the type of bacteria associated with BV. Nugent's scoring method was used for diagnosis of BV in this study...
2018: International Journal of Microbiology
https://www.readbyqxmd.com/read/29688458/preterm-infants-have-distinct-microbiomes-not-explained-by-mode-of-delivery-breastfeeding-duration-or-antibiotic-exposure
#14
Cecilie Dahl, Hein Stigum, Jørgen Valeur, Nina Iszatt, Virissa Lenters, Shyamal Peddada, Jørgen V Bjørnholt, Tore Midtvedt, Siddhartha Mandal, Merete Eggesbø
Background: Preterm infants have low gut microbial diversity and few anaerobes. It is unclear whether the low diversity pertains to prematurity itself or is due to differences in delivery mode, feeding mode or exposure to antibiotics. Methods: The Norwegian Microbiota Study (NoMIC) was established to examine the colonization of the infant gut and health outcomes. 16S rRNA gene Illumina amplicon-sequenced samples from 519 children (160 preterms), collected at 10 days, 4 months and 1 year postnatally, were used to calculate alpha diversity...
April 20, 2018: International Journal of Epidemiology
https://www.readbyqxmd.com/read/29684056/bifidobacteria-isolated-from-vaginal-and-gut-microbiomes-are-indistinguishable-by-comparative-genomics
#15
Aline C Freitas, Janet E Hill
Bifidobacteria colonize the human gastrointestinal tract, vagina, oral cavity and breast milk. They influence human physiology and nutrition through health-promoting effects, play an important role as primary colonizers of the newborn gut, and contribute to vaginal microbiome homeostasis by producing lactic acid. Nevertheless, the mechanisms by which bifidobacteria are transmitted from mother to infant remains in discussion. Moreover, studies have suggested that Bifidobacterium spp. have specializations for gut colonization, but comparisons of strains of the same bifidobacteria species from different body sites are lacking...
2018: PloS One
https://www.readbyqxmd.com/read/29674608/culturing-of-female-bladder-bacteria-reveals-an-interconnected-urogenital-microbiota
#16
Krystal Thomas-White, Samuel C Forster, Nitin Kumar, Michelle Van Kuiken, Catherine Putonti, Mark D Stares, Evann E Hilt, Travis K Price, Alan J Wolfe, Trevor D Lawley
Metagenomic analyses have indicated that the female bladder harbors an indigenous microbiota. However, there are few cultured reference strains with sequenced genomes available for functional and experimental analyses. Here we isolate and genome-sequence 149 bacterial strains from catheterized urine of 77 women. This culture collection spans 78 species, representing approximately two thirds of the bacterial diversity within the sampled bladders, including Proteobacteria, Actinobacteria, and Firmicutes. Detailed genomic and functional comparison of the bladder microbiota to the gastrointestinal and vaginal microbiotas demonstrates similar vaginal and bladder microbiota, with functional capacities that are distinct from those observed in the gastrointestinal microbiota...
April 19, 2018: Nature Communications
https://www.readbyqxmd.com/read/29658476/-microbiota-establishment-an-in-utero-colonization-decisive-for-future-health
#17
Rémi Gschwind, Thierry Fournier, Marie-José Butel, Sandra Wydau-Dematteis
Some diseases seem to have a developmental origin. Today, the microbiota is recognized as a determinant in health and diseases and one important step is its establishment in the neonate. Some variations in its composition including an imbalance (also called dysbiosis) have been associated to several pathologies. Recent studies suggest a bacterial colonization in the non-pregnant uterus, in the amniotic fluid and in the placenta, which were previously thought sterile. So, during deve-lopmental phases, the fetus could have encounter bacteria in utero...
April 2018: Médecine Sciences: M/S
https://www.readbyqxmd.com/read/29643849/insights-into-vaginal-bacterial-communities-and-metabolic-profiles-of-chlamydia-trachomatis-infection-positioning-between-eubiosis-and-dysbiosis
#18
Carola Parolin, Claudio Foschi, Luca Laghi, Chenglin Zhu, Nicoletta Banzola, Valeria Gaspari, Antonietta D'Antuono, Barbara Giordani, Marco Severgnini, Clarissa Consolandi, Melissa Salvo, Roberto Cevenini, Beatrice Vitali, Antonella Marangoni
The vaginal microbiota plays a crucial role in maintaining the health and functioning of the female genital tract, preventing the colonization of urogenital pathogens and sexually transmitted infections. In this study, we characterized the vaginal bacterial communities and the metabolome associated to Chlamydia trachomatis infection (CT: 20 women), compared to healthy condition (H: 22 women) and bacterial vaginosis (BV: 19 women). A microarray-based tool (VaginArray), implemented with a real-time PCR for Gardnerella vaginalis , was used to determine the vaginal bacterial composition, whereas the metabolic profiles were assessed by a proton-based nuclear magnetic resonance (1 H-NMR) spectroscopy...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29624945/the-threat-of-aerobic-vaginitis-to-pregnancy-and-neonatal-morbidity
#19
REVIEW
Eveline Kaambo, Charlene W J Africa
Aerobic vaginitis (AV) is an endogenous opportunistic infection brought about by the disruption of the normal vaginal microbiota. Its early diagnosis and treatment during pregnancy may reduce the risk of negative pregnancy outcomes. The aim of this review was to report on the aerobic bacteria most prevalent in AV and to provide evidence of the threat of untreated AV on pregnancy outcomes. More than 300 papers on preterm delivery were extracted from several research domains and filtered to include only AV-associated bacteria such as Staphylococcus aureus, Enterococcus faecalis, Escherichia coli and Group B streptococci and their association with adverse pregnancy outcomes...
June 2017: African Journal of Reproductive Health
https://www.readbyqxmd.com/read/29603066/culture-supernatants-of-lactobacillus-gasseri-and-l-crispatus-inhibit-candida-albicans-biofilm-formation-and-adhesion-to-hela-cells
#20
Yuko Matsuda, Otomi Cho, Takashi Sugita, Daiki Ogishima, Satoru Takeda
PURPOSE: Vulvovaginal candidiasis (VVC) is a common superficial infection of the vaginal mucous membranes caused by the fungus Candida albicans. The aim of this study was to assess the mechanisms underlying the inhibitory effects of the culture supernatants of Lactobacillus gasseri and L. crispatus, the predominant microbiota in Asian healthy women, on C. albicans biofilm formation. The inhibition of C. albicans adhesion to HeLa cells by Lactobacillus culture supernatant was also investigated...
March 30, 2018: Mycopathologia
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