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Vaginal microbiota

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https://www.readbyqxmd.com/read/28929093/the-elevated-rate-of-cesarean-section-and-its-contribution-to-non-communicable-chronic-diseases-in-latin-america-the-growing-involvement-of-the-microbiota
#1
REVIEW
Fabien Magne, Alexa Puchi Silva, Bielka Carvajal, Martin Gotteland
The current recommendation of the World Health Organization (WHO) regarding cesarean section (C-section) is that this clinical practice should be carried out only under specific conditions, when the health or life of the mother/newborn dyad is threatened, and that its use should not exceed 10-15% of the total deliveries. However, over the last few decades, the frequency of C-section delivery in medium- and high-income countries has rapidly increased worldwide. This review describes the evolution of this procedure in Latin American countries, showing that today more than half of newborns in the region are delivered by C-section...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28915448/the-composition-of-the-vaginal-microbiome-in-first-trimester-pregnant-women-influences-the-level-of-autophagy-and-stress-in-vaginal-epithelial-cells
#2
Dimitrios Nasioudis, Larry J Forney, G Maria Schneider, Karol Gliniewicz, Michael T France, Allison Boester, Mio Sawai, Jessica Scholl, Steven S Witkin
Epithelial cells lining the vagina are major components of genital tract immunity. The influence of the vaginal microbiome on properties of host epithelial cells is largely unexplored. We evaluated whether differences in the most abundant lactobacilli species or bacterial genera in the vagina of first trimester pregnant women were associated with variations in the extent of stress and autophagy in vaginal epithelial cells. Vaginal swabs from 154 first trimester pregnant women were analyzed for bacterial composition by amplification and sequencing of the V1-V3 region of bacterial 16S rRNA genes...
September 8, 2017: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/28904336/the-relation-between-cesarean-birth-and-child-cognitive-development
#3
Cain Polidano, Anna Zhu, Joel C Bornstein
This is the first detailed study of the relation between cesarean birth and child cognitive development. We measure differences in child cognitive performance at 4 to 9 years of age between cesarean-born and vaginally-born children (n = 3,666) participating in the Longitudinal Study of Australian Children (LSAC). LSAC is a nationally representative birth cohort surveyed biennially. Using multivariate regression, we control for a large range of confounders related to perinatal risk factors and the socio-economic advantage associated with cesarean-born children...
September 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28903767/treatment-of-biofilms-in-bacterial-vaginosis-by-an-amphoteric-tenside-pessary-clinical-study-and-microbiota-analysis
#4
Cornelia Gottschick, Zhi-Luo Deng, Marius Vital, Clarissa Masur, Christoph Abels, Dietmar H Pieper, Manfred Rohde, Werner Mendling, Irene Wagner-Döbler
BACKGROUND: Bacterial vaginosis (BV) is the most common vaginal syndrome among women in their reproductive years. It is associated with an increased risk of acquiring sexually transmitted infections and complications like preterm labor. BV is characterized by a high recurrence rate for which biofilms frequently found on vaginal epithelial cells may be a reason. RESULTS: Here, we report a controlled randomized clinical trial that tested the safety and effectiveness of a newly developed pessary containing an amphoteric tenside (WO3191) to disrupt biofilms after metronidazole treatment of BV...
September 13, 2017: Microbiome
https://www.readbyqxmd.com/read/28898440/low-lactobacilli-abundance-and-polymicrobial-diversity-in-the-lower-reproductive-tract-of-female-rhesus-monkeys-do-not-compromise-their-reproductive-success
#5
Wellington Z Amaral, Gabriele R Lubach, Amita Kapoor, Alexandra Proctor, Gregory J Phillips, Mark Lyte, Christopher L Coe
The lower reproductive tract of nonhuman primates is colonized with a diverse microbiota, resembling bacterial vaginosis (BV), a gynecological condition associated with negative reproductive outcomes in women. Our 4 aims were to: (i) assess the prevalence of low Lactobacilli and a BV-like profile in female rhesus monkeys; (ii) quantify cytokines in their cervicovaginal fluid (CVF); (iii) examine the composition and structure of their mucosal microbiota with culture-independent sequencing methods; and (iv) evaluate the potential influence on reproductive success...
September 12, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28878691/spontaneous-preterm-birth-is-associated-with-differential-expression-of-vaginal-metabolites-by-lactobacilli-dominated-microflora
#6
Graham P Stafford, Jennifer L Parker, Emmanuel Amabebe, James Kistler, Steven Reynolds, Victoria Stern, Martyn Paley, Dilly O C Anumba
A major challenge in preventing preterm birth (PTB) is identifying women at greatest risk. This pilot study prospectively examined the differences in vaginal microbiota and metabolite profiles of women who delivered prematurely compared to their term counterparts in a cohort of asymptomatic (studied at 20-22, n = 80; and 26-28 weeks, n = 41) and symptomatic women (studied at 24-36 weeks, n = 37). Using 16S rRNA sequencing, the vaginal microbiota from cervicovaginal fluid samples was characterized into five Community State Types (CST) dominated by Lactobacillus spp...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28877893/randomized-controlled-trial-on-the-impact-of-early-life-intervention-with-bifidobacteria-on-the-healthy-infant-fecal-microbiota-and-metabolome
#7
Monika Bazanella, Tanja V Maier, Thomas Clavel, Ilias Lagkouvardos, Marianna Lucio, Maria X Maldonado-Gòmez, Chloe Autran, Jens Walter, Lars Bode, Philippe Schmitt-Kopplin, Dirk Haller
Background: Early-life colonization of the intestinal tract is a dynamic process influenced by numerous factors. The impact of probiotic-supplemented infant formula on the composition and function of the infant gut microbiota is not well defined.Objective: We sought to determine the effects of a bifidobacteria-containing formula on the healthy human intestinal microbiome during the first year of life.Design: A double-blind, randomized, placebo-controlled study of newborn infants assigned to a standard whey-based formula containing a total of 10(8) colony-forming units (CFU)/g of Bifidobacterium bifidum, Bifidobacterium breve, Bifidobacterium longum, B...
September 6, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28867636/characterization-of-vaginal-microbiota-of-endometritis-and-healthy-sows-using-high-throughput-pyrosequencing-of-16s-rrna-gene
#8
Jun Wang, Changjiu Li, Lucky T Nesengani, Yongsheng Gong, Shumin Zhang, Wenfa Lu
Endometritis is one of major challenges in reproduction infections caused by bacteria in sows. Understanding of the vaginal bacterial community between endometritis and healthy sows serves as a critical step to develop more effective ways to improve reproduction ability in pig industry. The aim of the present study is to evaluate and compare the vaginal microbiota of endometritis and healthy sows using high-throughput pyrosequencing of 16S rRNA gene. The main bacterium found at the phylum level were Firmicutes (60...
September 1, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28860468/characterization-of-cervico-vaginal-microbiota-in-women-developing-persistent-high-risk-human-papillomavirus-infection
#9
Monica Di Paola, Cristina Sani, Ann Maria Clemente, Anna Iossa, Eloisa Perissi, Giuseppe Castronovo, Michele Tanturli, Damariz Rivero, Federico Cozzolino, Duccio Cavalieri, Francesca Carozzi, Carlotta De Filippo, Maria Gabriella Torcia
Changes in cervico-vaginal microbiota with Lactobacillus depletion and increased microbial diversity facilitate human papillomavirus (HPV) infection and might be involved in viral persistence and cancer development. To define the microbial Community State Types (CSTs) associated with high-risk HPV-persistence, we analysed 55 cervico-vaginal samples from HPV positive (HPV+) women out of 1029 screened women and performed pyrosequencing of 16S rDNA. A total of 17 samples from age-matched HPV negative (HPV-) women were used as control...
August 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28855672/evolution-of-gut-bifidobacterium-population-in-healthy-japanese-infants-over-the-first-three-years-of-life-a-quantitative-assessment
#10
Ravinder Nagpal, Takashi Kurakawa, Hirokazu Tsuji, Takuya Takahashi, Kazunari Kawashima, Satoru Nagata, Koji Nomoto, Yuichiro Yamashiro
Bifidobacteria are important members of human gut microbiota; however, quantitative data on their early-life dynamics is limited. Here, using a sensitive reverse transcription-qPCR approach, we demonstrate the carriage of eight signature infant-associated Bifidobacterium species (B. longum, B. breve, B. bifidum, B. catenulatum group, B. infantis, B. adolescentis, B. angulatum and B. dentium) in 76 healthy full-term vaginally-born infants from first day to three years of life. About 21% babies carry bifidobacteria at first day of life (6...
August 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28852043/comparison-of-vaginal-microbiota-sampling-techniques-cytobrush-versus-swab
#11
Anita Mitra, David A MacIntyre, Vishakha Mahajan, Yun S Lee, Ann Smith, Julian R Marchesi, Deirdre Lyons, Phillip R Bennett, Maria Kyrgiou
Evidence suggests the vaginal microbiota (VM) may influence risk of persistent Human Papillomavirus (HPV) infection and cervical carcinogenesis. Established cytology biobanks, typically collected with a cytobrush, constitute a unique resource to study such associations longitudinally. It is plausible that compared to rayon swabs; the most commonly used sampling devices, cytobrushes may disrupt biofilms leading to variation in VM composition. Cervico-vaginal samples were collected with cytobrush and rayon swabs from 30 women with high-grade cervical precancer...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28844447/women-and-their-microbes-the-unexpected-friendship
#12
REVIEW
Jessica A Younes, Elke Lievens, Ruben Hummelen, Rebecca van der Westen, Gregor Reid, Mariya I Petrova
Communities of microbiota have been associated with numerous health outcomes, and while much emphasis has been placed on the gastrointestinal niche, there is growing interest in the microbiome specific for female reproductive health and the health of their offspring. The vaginal microbiome plays an essential role not only in health and dysbiosis, but also potentially in successful fertilization and healthy pregnancies. In addition, microbial communities have been isolated from formerly forbidden sterile niches such as the placenta, breast, uterus, and Fallopian tubes, strongly suggesting an additional microbial role in women's health...
August 22, 2017: Trends in Microbiology
https://www.readbyqxmd.com/read/28841911/blood-as-a-route-of-transmission-of-uterine-pathogens-from-the-gut-to-the-uterus-in-cows
#13
Soo Jin Jeon, Federico Cunha, Achilles Vieira-Neto, Rodrigo C Bicalho, Svetlana Lima, Marcela L Bicalho, Klibs N Galvão
BACKGROUND: Metritis is an inflammatory disease of the uterus caused by bacterial infection, particularly Bacteroides, Porphyromonas, and Fusobacterium. Bacteria from the environment, feces, or vagina are believed to be the only sources of uterine contamination. Blood seeps into the uterus after calving; therefore, we hypothesized that blood could also be a seeding source of uterine bacteria. Herein, we compared bacterial communities from blood, feces, and uterine samples from the same cows at 0 and 2 days postpartum using deep sequencing and qPCR...
August 25, 2017: Microbiome
https://www.readbyqxmd.com/read/28835692/the-vaginal-microbiome-of-pregnant-women-is-less-rich-and-diverse-with-lower-prevalence-of-mollicutes-compared-to-non-pregnant-women
#14
Aline C Freitas, Bonnie Chaban, Alan Bocking, Maria Rocco, Siwen Yang, Janet E Hill, Deborah M Money
The vaginal microbiome plays an important role in maternal and neonatal health. Imbalances in this microbiota (dysbiosis) during pregnancy are associated with negative reproductive outcomes, such as pregnancy loss and preterm birth, but the underlying mechanisms remain poorly understood. Consequently a comprehensive understanding of the baseline microbiome in healthy pregnancy is needed. We characterized the vaginal microbiomes of healthy pregnant women at 11-16 weeks of gestational age (n = 182) and compared them to those of non-pregnant women (n = 310)...
August 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28827640/intestinal-colonisation-patterns-in-breastfed-and-formula-fed-infants-during-the-first-12-weeks-of-life-reveal-sequential-microbiota-signatures
#15
Harro M Timmerman, Nicole B M M Rutten, Jos Boekhorst, Delphine M Saulnier, Guus A M Kortman, Nikhat Contractor, Martin Kullen, Esther Floris, Hermie J M Harmsen, Arine M Vlieger, Michiel Kleerebezem, Ger T Rijkers
The establishment of the infant gut microbiota is a highly dynamic process dependent on extrinsic and intrinsic factors. We characterized the faecal microbiota of 4 breastfed infants and 4 formula-fed infants at 17 consecutive time points during the first 12 weeks of life. Microbiota composition was analysed by a combination of 16S rRNA gene sequencing and quantitative PCR (qPCR). In this dataset, individuality was a major driver of microbiota composition (P = 0.002) and was more pronounced in breastfed infants...
August 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819919/the-microbial-mother-meets-the-independent-organ-cultural-discourses-of-reproductive-microbiomes
#16
Jessica R Houf
The human microbiome is changing the way experts and non-experts think about germs and microorganisms. This essay is a gender analysis of contemporary discourses surrounding the human reproductive microbiome, specifically the vaginal microbiota and the penile microbiota. I first historically situate the human reproductive microbiome within the germ theory of disease. Then, I draw on Heather Paxson's Foucauldian and Latourian concept of microbiopolitics to argue that microbiopolitics is not only about how humans should live with microorganisms; but it also impacts how humans and microbes live together as gendered beings...
August 17, 2017: Journal of Medical Humanities
https://www.readbyqxmd.com/read/28814408/intrinsic-maturational-neonatal-immune-deficiencies-and-susceptibility-to-group-b-streptococcus-infection
#17
REVIEW
Michelle L Korir, Shannon D Manning, H Dele Davies
Although a normal member of the gastrointestinal and vaginal microbiota, group B Streptococcus (GBS) can also occasionally be the cause of highly invasive neonatal disease and is an emerging pathogen in both elderly and immunocompromised adults. Neonatal GBS infections are typically transmitted from mother to baby either in utero or during passage through the birth canal and can lead to pneumonia, sepsis, and meningitis within the first few months of life. Compared to the adult immune system, the neonatal immune system has a number of deficiencies, making neonates more susceptible to infection...
October 2017: Clinical Microbiology Reviews
https://www.readbyqxmd.com/read/28812207/the-vaginal-microbiome-and-its-potential-to-impact-efficacy-of-hiv-pre-exposure-prophylaxis-for-women
#18
REVIEW
Jennifer Velloza, Renee Heffron
PURPOSE OF REVIEW: This review describes existing evidence addressing the potential modulation of pre-exposure prophylaxis (PrEP) products, specifically 1% tenofovir (TFV) gel and oral tenofovir-based PrEP, by vaginal dysbiosis and discusses future considerations for delivering novel, long-acting PrEP products to women at high risk for vaginal dysbiosis and HIV. RECENT FINDINGS: We describe results from analyses investigating the modification of PrEP efficacy by vaginal dysbiosis and studies of biological mechanisms that could render PrEP ineffective in the presence of specific microbiota...
August 15, 2017: Current HIV/AIDS Reports
https://www.readbyqxmd.com/read/28807017/the-urinary-microbiota-of-men-and-women-and-its-changes-in-women-during-bacterial-vaginosis-and-antibiotic-treatment
#19
Cornelia Gottschick, Zhi-Luo Deng, Marius Vital, Clarissa Masur, Christoph Abels, Dietmar H Pieper, Irene Wagner-Döbler
BACKGROUND: The urinary microbiota is similarly complex as the vaginal and penile microbiota, yet its role as a reservoir for pathogens and for recurrent polymicrobial biofilm diseases like bacterial vaginosis (BV) is not clear. RESULTS: Here, we analysed the urinary microbiota of healthy men and women and compared it with that of women during BV and after antibiotic treatment using next-generation sequencing of the 16S rRNA gene V1-V2 regions. Eight different community types, so called urotypes (UT), were identified in healthy humans, all of which were shared between men and women, except UT 7, dominated in relative abundance by Lactobacillus crispatus, which was found in healthy women only...
August 14, 2017: Microbiome
https://www.readbyqxmd.com/read/28792372/treatment-failure-of-bacterial-vaginosis-is-not-associated-with-higher-loads-of-atopobium-vaginae-and-gardnerella-vaginalis
#20
Carolina Sanitá Tafner Ferreira, Gilbert Gerard Donders, Cristina Maria Garcia de Lima Parada, Andrea da Rocha Tristão, Thaiz Fernandes, Márcia Guimarães da Silva, Camila Marconi
PURPOSE: Cervicovaginal Atopobium vaginae and Gardnerella vaginalis are strongly associated with bacterial vaginosis (BV) and are the main components of vaginal biofilms. The low efficacy of BV treatment with metronidazole may be due to the presence of such biofilms. Thus, the aim of this study was to compare the pretreatment cervicovaginal loads of A. vaginae and G. vaginalis for women who restored normal flora and those who persisted with BV after a full course of oral metronidazole...
August 2017: Journal of Medical Microbiology
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