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https://www.readbyqxmd.com/read/28448583/characterization-of-the-fecal-microbiome-during-neonatal-and-early-pediatric-development-in-puppies
#1
Blake C Guard, Hanna Mila, Jörg M Steiner, Claire Mariani, Jan S Suchodolski, Sylvie Chastant-Maillard
Limited information is available describing the development of the neonatal fecal microbiome in dogs. Feces from puppies were collected at 2, 21, 42, and 56 days after birth. Feces were also collected from the puppies' mothers at a single time point within 24 hours after parturition. DNA was extracted from fecal samples and 454-pyrosequencing was used to profile 16S rRNA genes. Species richness continued to increase significantly from 2 days of age until 42 days of age in puppies. Furthermore, microbial communities clustered separately from each other at 2, 21, and 42 days of age...
2017: PloS One
https://www.readbyqxmd.com/read/28434745/hot-topic-16s-rrna-gene-sequencing-reveals-the-microbiome-of-the-virgin-and-pregnant-bovine-uterus
#2
S G Moore, A C Ericsson, S E Poock, P Melendez, M C Lucy
We tested the hypothesis that the uterus of virgin heifers and pregnant cows possessed a resident microbiome by 16S rRNA gene sequencing of the virgin and pregnant bovine uterus. The endometrium of 10 virgin heifers in estrus and the amniotic fluid, placentome, intercotyledonary placenta, cervical lumen, and external cervix surface (control) of 5 pregnant cows were sampled using aseptic techniques. The DNA was extracted, the V4 hypervariable region of the 16S rRNA gene was amplified, and amplicons were sequenced using Illumina MiSeq technology (Illumina Inc...
April 20, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28434085/exploring-the-oral-microflora-of-preschool-children
#3
Wen Ren, Qun Zhang, Xuenan Liu, Shuguo Zheng, Lili Ma, Feng Chen, Tao Xu, Baohua Xu
The oral cavity is one of the most important and complicated habitats in our body and supports diverse microbial communities. In this study, we aimed to determine the bacterial diversity and composition of various oral micro-niches. Samples were collected from supragingival plaque, saliva, and tongue coating from 10 preschool children (30 samples total). 16S rRNA gene pyrosequencing dataset generated 314,639 clean reads with an average of 10,488 ± 2,787 reads per sample. The phyla Firmicutes, Proteobacteria, Actinobacteria, Bacteroidetes, and Fusobacteria were predominant, accounting for more than 90% of the total sequences...
April 22, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28413200/the-oral-microbiome-community-variations-associated-with-normal-potentially-malignant-disorders-and-malignant-lesions-of-the-oral-cavity
#4
S F Mok, C Karuthan, Y K Cheah, W C Ngeow, Z Rosnah, S F Yap, H K A Ong
The human oral microbiome has been known to show strong association with various oral diseases including oral cancer. This study attempts to characterize the community variations between normal, oral potentially malignant disorders (OPMD) and cancer associated microbiota using 16S rDNA sequencing. Swab samples were collected from three groups (normal, OPMD and oral cancer) with nine subjects from each group. Bacteria genomic DNA was isolated in which full length 16S rDNA were amplified and used for cloned library sequencing...
April 2017: Malaysian Journal of Pathology
https://www.readbyqxmd.com/read/28303827/characterisation-of-the-human-oral-microbiome-in-patients-with-coronary-artery-disease-using-next-generation-sequencing-of-16srrna-amplicons
#5
Thangam Menon, Sathya Narayanan Gopalakrishnan, Rayvathy Balasubramanian, Stalin Roy Justin
INTRODUCTION: Oral health is suspected to be linked to heart disease since species of bacteria that cause periodontitis and dental caries have been found in the atherosclerotic plaque in arteries in the heart. OBJECTIVES: The aim of this study was to characterize the oral microbiome in patients with coronary artery disease (CAD) and in a patient with dental caries (DC) without any clinical symptoms of CAD. METHODS: DNA was extracted from the oral swabs collected from the patients and sequencing was performed by next generation sequencing method using Illumina (MiSeq) platform...
January 2017: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28259411/genetic-and-functional-analysis-of-the-bovine-uterine-microbiota-part-ii-purulent-vaginal-discharge-versus-healthy-cows
#6
M L S Bicalho, S Lima, C H Higgins, V S Machado, F S Lima, R C Bicalho
The aim of this study was to characterize, using metagenomic shotgun DNA sequencing, the intrauterine microbial population and its predicted functional diversity within healthy cows and cows presenting purulent vaginal discharge (PVD). Twenty Holstein dairy cows from a single farm were enrolled in the study at 25 to 35 d postpartum. Purulent vaginal discharge was diagnosed by retrieving and scoring vaginal discharge using the Metricheck device (Simcro, Hamilton, New Zealand). Intrauterine samples for metagenomic analysis were collected by the cytobrush technique from 8 cows diagnosed with PVD and 12 healthy cows...
May 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28259404/genetic-and-functional-analysis-of-the-bovine-uterine-microbiota-part-i-metritis-versus-healthy-cows
#7
M L S Bicalho, V S Machado, C H Higgins, F S Lima, R C Bicalho
Metritis is a uterine disease that affects 10 to 30% of all lactating dairy cows and has detrimental effects on reproductive performance, milk production, and survival. Data regarding the identity and abundance of bacterial genes governing traits such as virulence, antibiotic resistance, and stress responses could enable identification of previously unknown agents that play a role in metritis pathogenesis. Moreover, such knowledge could lead to the development of improved treatments or preventive methods. Therefore, the objectives of this study were to characterize the uterine microbial population and to differentiate, for the first time, the microbial functional diversity in cows with metritis versus healthy cows...
May 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28256031/microbiome-dynamic-modulation-through-functional-diets-based-on-pre-and-probiotics-mannan-oligosaccharides-and-saccharomyces-cerevisiae-in-juvenile-rainbow-trout-oncorhynchus-mykiss
#8
A T Gonçalves, C Gallardo-Escárate
AIMS: This study used high-throughput sequencing to evaluate the intestinal microbiome dynamics in rainbow trout (Oncorhynchus mykiss) fed commercial diets supplemented with either pre- or probiotics (0·6% mannan-oligosaccharides and 0·5% Saccharomyces cerevisiae respectively) or the mixture of both. METHODS AND RESULTS: A total of 57 fish whole intestinal mucosa and contents bacterial communities were characterized by high-throughput sequencing and analysis of the V3-V4 region of the 16S rRNA gene, as well as the relationship between plasma biochemical health indicators and microbiome diversity...
March 3, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28220148/individual-signatures-define-canine-skin-microbiota-composition-and-variability
#9
Anna Cuscó, Armand Sánchez, Laura Altet, Lluís Ferrer, Olga Francino
Dogs present almost all their skin sites covered by hair, but canine skin disorders are more common in certain skin sites and breeds. The goal of our study is to characterize the composition and variability of the skin microbiota in healthy dogs and to evaluate the effect of the breed, the skin site, and the individual. We have analyzed eight skin sites of nine healthy dogs from three different breeds by massive sequencing of 16S rRNA gene V1-V2 hypervariable regions. The main phyla inhabiting the skin microbiota in healthy dogs are Proteobacteria, Firmicutes, Fusobacteria, Actinobacteria, and Bacteroidetes...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28183168/effects-of-alfalfa-flavonoids-extract-on-the-microbial-flora-of-dairy-cow-rumen
#10
Jinshun Zhan, Mingmei Liu, Caixia Wu, Xiaoshuang Su, Kang Zhan, Guo Qi Zhao
Objective: The effect of flavonoids from alfalfa on the microbial flora was determined using molecular techniques of 16S ribosome deoxyribonucleic acid (rDNA) analysis. Methods:Four primiparous Holstein heifers fitted with ruminal cannulas were used in a 4 × 4 Latin square design and fed a total mixed ration (TMR) to which alfalfa flavonoids extract (AFE) was added at the rates of 0 (A, control), 20 (B), 60 (C) or 100 (D) mg per kg of heifer body weight (BW) . Results: The number of OTUs in heifers given higher levels of flavonoid extract (C and D) was higher than for the two other treatments...
February 1, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28161185/the-bovine-colostrum-microbiome-and-its-association-with-clinical-mastitis
#11
Svetlana F Lima, Andre G V Teixeira, Fabio S Lima, Erika K Ganda, Catherine H Higgins, Georgios Oikonomou, Rodrigo C Bicalho
In an effort to characterize colostrum microbial diversity and its potential associations with early-lactation clinical mastitis, we used high-throughput sequencing of the 16S rRNA gene to investigate the bovine colostrum microbiome. A prospective observational study was conducted that included 70 Holstein cows; colostrum samples were collected from all 4 mammary gland quarters. Colostrum samples were categorized according to whether the quarter was diagnosed (CMC) or not diagnosed (NCMC) with clinical mastitis during the first 30 d postpartum...
February 1, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28124157/impact-of-the-microbiota-and-gastric-disease-development-by-helicobacter-pylori
#12
Teresa Alarcón, Laura Llorca, Guillermo Perez-Perez
Microorganisms in humans form complex communities with important functions and differences in each part of the body. The stomach was considered to be a sterile organ until the discovery of Helicobacter pylori, but nowadays, it is possible to demonstrate that other microorganisms beyond H. pylori can colonize the gastric mucosa and that the diverse microbiota ecosystem of the stomach is different from the mouth and the esophagus, and also from the small intestine and large intestine. H. pylori seems to be the most important member of the gastric microbiota with the highest relative abundance when present, but when it is absent, the stomach has a diverse microbiota...
2017: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/28120199/a-comprehensive-profiling-of-supragingival-bacterial-composition-in-chinese-twin-children-and-their-mothers
#13
COMPARATIVE STUDY
Qin Du, Mingyun Li, Xuedong Zhou, Kun Tian
To investigate the factors influencing the oral microbiome, 16 twin pairs and their mothers were enrolled in this study. There were 7 monozygotic (MZ) twins and 9 dizygotic (DZ) twins, with an average age of 6.18 ± 3.5. Supragingival plaques and caries tissues were collected and the 16S rDNA was analyzed by 454 pyrosequencing. A total of 18 phyla and 179 genuses were found. Caries children harbored a higher portion of Actinobacteria than caries-free ones, and one lineage was found to be less abundant in the caries tissues compared to the supragingival plaque at each level from the phylum down to the genus level, which was Fusobacteria at Phylum, Fusobacteriia at Class, Fusobacteriales at Order, Leptotrichiaceae at Family and Leptotrichia at genus level...
May 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28103814/the-respiratory-microbiome-in-bronchial-mucosa-and-secretions-from-severe-ige-mediated-asthma-patients
#14
Laura Millares, Guadalupe Bermudo, Vicente Pérez-Brocal, Christian Domingo, Marian Garcia-Nuñez, Xavier Pomares, Andrés Moya, Eduard Monsó
BACKGROUND: The bronchial microbiome in chronic lung diseases presents an abnormal pattern, but its microbial composition and regional differences in severe asthma have not been sufficiently addressed. The aim of the study was to describe the bacterial community in bronchial mucosa and secretions of patients with severe chronic asthma chronically treated with corticosteroids in addition to usual care according to Global Initiative for Asthma. Bacterial community composition was obtained by 16S rRNA gene amplification and sequencing, and functional capabilities through PICRUSt...
January 19, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28093882/the-gastrointestinal-tract-of-farmed-mink-neovison-vison-maintains-a-diverse-mucosa-associated-microbiota-following-a-3-day-fasting-period
#15
Martin I Bahl, Anne S Hammer, Tove Clausen, Anabelle Jakobsen, Søren Skov, Lars Andresen
Although it is well documented that the gut microbiota plays an important role in health and disease in mammalian species, this area has been poorly studied among carnivorous animals, especially within the mustelidae family. The gastrointestinal tract of carnivores is characterized by its short length and fast transit time, as compared to omnivores and herbivores, which is due to the low level of inherent fermentation. Mink represents an example of this, which have a GI tract only four times the length of the body and a transit time of approximately 4-5 hr...
January 16, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28058599/epiphytic-bacterial-communities-of-the-alga-fucus-vesiculosus-in-oil-contaminated-water-areas-of-the-barents-sea
#16
D V Pugovkin, A Liaimer, J B Jensen
Taxonomic compositions of epiphytic bacterial communities in water areas differing in levels of oil pollution were revealed. In total, 82 bacterial genera belonging to 16 classes and 11 phyla were detected. All detected representatives of epiphytic bacterial communities belonged to the phyla Actinobacteria, Bacteroidetes, Planctomycetes, Proteobacteria, Verrucomicrobia, Acidobacteria, Cyanobacteria, Firmicutes, and Fusobacteria and candidate division TM7. The ratio of the phyla in the communities varied depending on the levels of oil pollution...
November 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28024525/gut-content-microbiota-of-introduced-bigheaded-carps-hypophthalmichthys-spp-inhabiting-the-largest-shallow-lake-in-central-europe
#17
Andrea K Borsodi, Attila Szabó, Gergely Krett, Tamás Felföldi, András Specziár, Gergely Boros
Studying the microbiota in the alimentary tract of bigheaded carps (Hypophthalmichthys spp.) gained special interest recently, as these types of investigations on non-native fish species may lead to a better understanding of their ecological role and feeding habits in an invaded habitat. For microbiological examinations, bigheaded carp gut contents and water column samples from Lake Balaton (Hungary) were collected from spring to autumn in 2013. Denaturing Gradient Gel Electrophoresis (DGGE) and pyrosequencing of the 16S rRNA gene were performed to reveal the composition...
January 2017: Microbiological Research
https://www.readbyqxmd.com/read/27976528/streptococcus-mutans-spap-binds-to-radd-of-fusobacterium-nucleatum-ssp-polymorphum
#18
Lihong Guo, Bhumika Shokeen, Xuesong He, Wenyuan Shi, Renate Lux
Adhesin-mediated bacterial interspecies interactions are important elements in oral biofilm formation. They often occur on a species-specific level, which could determine health- or disease association of a biofilm community. Among the key players involved in these processes are the ubiquitous fusobacteria that have been recognized for their ability to interact with numerous different binding partners. Fusobacterial interactions with Streptococcus mutans, an important oral cariogenic pathogen, have previously been described but most studies focused on binding to non-mutans streptococci and specific cognate adhesin pairs remain to be identified...
December 15, 2016: Molecular Oral Microbiology
https://www.readbyqxmd.com/read/27957630/characterization-of-gastric-microbiota-in-twins
#19
COMPARATIVE STUDY
Quanjiang Dong, Yongning Xin, Lili Wang, Xinying Meng, Xinjuan Yu, Linlin Lu, Shiying Xuan
Contribution of host genetic backgrounds in the development of gastric microbiota has not been clearly defined. This study was aimed to characterize the biodiversity, structure and composition of gastric microbiota among twins. A total of four pairs of twins and eight unrelated individuals were enrolled in the study. Antral biopsies were obtained during endoscopy. The bacterial 16S rRNA gene was amplified and pyrosequenced. Sequences were analyzed for the composition, structure, and α and β diversities of gastric microbiota...
February 2017: Current Microbiology
https://www.readbyqxmd.com/read/27894254/divergent-selection-induced-obesity-alters-the-composition-and-functional-pathways-of-chicken-gut-microbiota
#20
Jinmei Ding, Lele Zhao, Lifeng Wang, Wenjing Zhao, Zhengxiao Zhai, Li Leng, Yuxiang Wang, Chuan He, Yan Zhang, Heping Zhang, Hui Li, He Meng
BACKGROUND: The gastrointestinal tract is populated by a complex and vast microbial network, with a composition that reflects the relationships of the symbiosis, co-metabolism, and co-evolution of these microorganisms with their host. The mechanism that underlies such interactions between the genetics of the host and gut microbiota remains elusive. RESULTS: To understand how genetic variation of the host shapes the gut microbiota and interacts with it to affect the metabolic phenotype of the host, we compared the abundance of microbial taxa and their functional performance between two lines of chickens (fat and lean) that had undergone long-term divergent selection for abdominal fat pad weight, which resulted in a 4...
November 28, 2016: Genetics, Selection, Evolution: GSE
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