View clinical trials related to Microbial Colonization.
Filter by:Our bodies are home to millions and millions of microbes (bacteria, fungi and viruses), that live in harmony with us without producing any negative (disease producing) effects. Research is beginning to show that these microbes interact with us to help with our immune system, digestive tract and brain development among many other effects. This community of microbes, known collectively as our microbiome, may commence colonisation while we are developing in the womb and becomes quickly established after we are born. Much remains unknown about how preterm birth affects the development of our microbiome. The goal of this longitudinal observational study is to gather more information of how and from where we get those first few microbes, the pattern in which our microbiome develops, and how intensive care for a preterm baby affects this. The main questions it aims to answer are: - How is the gut microbiome of a very premature infant affected by clinical management practices (e.g. antibiotics, probiotics, feeding) and how does it progress subsequently. - How do probiotics colonise the preterm gut, and how do they persist once supplementation is discontinued. Samples will be collected from mothers and their infants during the NICU admission including: - A rectal swab - Meconium and stool - Urine - Blood - Expressed breastmilk - Maternal stool - Maternal oral swab - Maternal vaginal or skin swab (depending on mode of delivery) Samples will be analysed using next generation sequencing techniques to, for example, evaluate microbial composition of the samples or determine functional microbiome-host interactions.
The microbiome, the collection of microorganisms that live in our gut, plays an important role in maintaining our health, proper nutrient absorption, nutrient turnover and immunity. After birth, a symbiotic relationship develops with the strains of bacteria that colonise our gut, and the presence and proportion of bacteria is individualised and highly variable. A healthy bacterial flora is essential for the cells of the intestinal mucosa. Glycoproteins in the cell surface mucus coat are important nutrients for bacteria, while some bacterial strains supply mucosal cells with nutrient molecules (e.g. short-chain fatty acids) that are their essential energy source. An abnormal change in the proportion of bacterial strains that make up the microbiome, dysbacteriosis, in which pathogenic bacteria proliferate at the expense of members of the normal flora, can cause a number of pathologies. Nutrient supply to the cells of the mucosa is reduced, making them more vulnerable and leading to various pathological conditions. The microbiome and the essential nutrients they produce have also been found to play an important role in wound healing. A decrease in the diversity of the microbiome, an increase in the relative number of pathogenic bacteria and a decrease in the proportion of 'beneficial' bacteria increases the risk of surgical complications of infection and suture failure.
The oral cavity is an easily accessible anatomical site that accurately reflects the health of the individual. The mouth is considered an early indicator of biological aging, leading to the identification of oral biomarkers predictive of future alterations. Current data show that the oral health of high level athletes is globally altered with an increase in cariogenic indexes, an increased incidence of periodontitis, dental trauma and dry mouth syndromes. Few studies have focused on the oral microbiota compared to mouthguards used in rugby or boxing which seem to induce dysbiosis, a recent study shows an effect of ketogenic diet on bacterial changes in the mouth of endurance athletes. This project focuses on the impact of intensive sport practice on oral health and the identification of oral biomarkers associated with physical activity. The objective of this study is to investigate the impact of the amount of endurance sport practice on oral microbiota and oral health in young adults. the hypothesis is that a sedentary lifestyle and high-level sport induce depletion and/or changes in the oral microbiota compared to regular physical activity.
Rationale: Early diagnosis of sepsis in neonates is complicated as the signs and symptoms are nonspecific. Although blood culture is the gold standard for the diagnosis, false-negative results and long incubation period of 36-72 hours limits the use of blood culture to rule out sepsis at initial suspicion. Since delay in diagnosis may lead to progressive deterioration, antibiotics are often started empirically at initial sepsis suspicion, awaiting results of the blood culture. Consequently, uninfected infants are often unnecessarily exposed to empirical antibiotics. To reduce unnecessary treatment of non-infected infants, an early, sensitive and specific diagnostic tool would be helpful to guide clinicians faster when to discontinue antibiotics. Molecular Culture (MC) via IS-pro is a novel, advanced, molecular culture technique which is able to culture bacteria within 4 hours after blood sampling. MC might thus be a potential diagnostic tool to detect or rule out sepsis in infants quickly, however data on MC for diagnosis of sepsis in this population is limited. Objective: The aim of this study is to evaluate whether MC is of additive predictive value for the diagnosis sepsis in this vulnerable group. Study design: Prospective observational cohort study. Study population: All infants suspected for neonatal sepsis of both early and late onset will be eligible for study participation. They will be treated according to the standard local guidelines. Intervention (if applicable): In case of a suspicion of sepsis at birth, blood will be collected for a conventional blood culture as part of standard care. Additionally, a blood sample will be collected from the umbilical cord for MC. In case of a suspicion of sepsis not directly postpartum, an additional blood sample will be taken for MC analysis, directly following sampling for conventional culture, implying no extra phlebotomy. Main study parameters/endpoints: The main study parameter is the discordance in positive and negative outcomes of MC compared to outcomes of conventional blood culture. As the diagnostic accuracy of the conventional blood culture (the current gold standard) is being questioned, the predictive value of MC versus conventional blood culture towards clinical sepsis will also be tested.
Within the Denali study the effect of 3 weeks intervention with GOS on the abundance of Bifidobacterium in faecal samples will be investigated.
The purpose of this study is to evaluate the skin quality improvement and colonization efficacy following the application of probiotic Micrococcus luteus Q24 (BLIS Q24) to the elbow and back of forearm in a topical balm format in healthy adults.
Primary Aim: -To determine the prevalence and pattern of bronchial colonization in patients presenting with lung cancer at the time of diagnosis Secondary Aim: -To assess the potential demographic, clinical, radiological and histological predictors of colonization in patients with lung cancer
The goal of this clinical trial is to learn about the gut microbiome in healthy postmenopausal women aged 50-64. The main questions it aims to answer are: - Investigate whether the activity of the bacterial enzyme β-glucuronidase and the abundance of β-glucuronidase-producing bacteria could be decreased by ingestion of 2 apples a day for a period of 6 weeks - Examine changes in gut microbiota composition, diversity, and functional capacity - Examine feasibility of eating 2 apples a day for a period of 6 weeks Participants will eat 2 apples a day for a period of 6 weeks. Six weeks includes the period from the start of the study and gathering of baseline characteristics/questionnaires till the finish.
This is a prospective clinical intervention trial where patients with moderately active ulcerative colitis are randomized to either normal healthy diet or a diet with elimination of emulsifying agents within the E 400-group with special respect to carragenan, CMC and polysorbates. At study start and end after one month their diet, clinical characteristics and microbiota will be analysed. The hypotheses are that their disease activity measured with calprotectin and their microbiota will improve after intervention.
In a randomized controlled trial we will research the effect of calorie restriction with early and mid-day time-restricted eating (TRE) and daily calorie restriction on weight loss and human health parameters. Participants will be divided into three groups: early time-restriction group (8:00 AM to 4:00 PM), mid-day restriction group (1:00 PM to 9:00 PM) and daily calorie restriction group (8:00 AM to 9:00 PM). Participants will follow dietary strategy with three planned meals and calorie restriction. Anthropometrical and biochemical parameters will be measured at baseline, after one month, two months and at after three months of intervention. Resting metabolic rate, ultrasound scan of abdomen and ultrasound scan of carotid arteries will be measured at baseline and after three months of intervention. In addition, stool samples will be also taken at baseline and after three months of intervention.