View clinical trials related to Microbial Colonization.
Filter by:The purpose of the protocol is to study the pulmonary microbiome in patients who develop pneumonia.
Through contact with peers in daycare and (primary)school young children play a large role in spreading respiratory pathogens. In this study the investigators will investigate this transmission, the subsequent colonization and infection dynamics, and their association with clinical symptoms and local immune response through dense minimally-invasive sampling. This study will allow us a unique insight into the transmission-, infection-, and colonization-potential of the respiratory pathogens.
Artificial airways, such as endotracheal tubes and tracheostomies, in the pediatric and neonatal intensive care units (PICU, NICU respectively) are lifesaving for patients in respiratory failure, among other conditions. These devices are not without a risk of infection - ventilator-associated infections (VAIs), namely ventilator associated pneumonia (VAP) and ventilator-associated tracheitis (VAT), are common. Treatment of suspected VAI accounts for nearly half of all Pediatric Intensive Care Unit (PICU) antibiotic use. VAI can represent a continuum from tracheal colonization, progression to tracheobronchial inflammation, and then pneumonia. Colonization of these airways is common and bacterial growth does not necessarily indicate a clinically significant infection. Tracheostomies, which are artificial airways meant for chronic use, are routinely exchanged on a semi-monthly to monthly basis, in part to disrupt bacterial biofilm formation that aids bacterial colonization and perhaps infection. When patients with tracheostomies are admitted for acute on chronic respiratory failure or a concern for an infection, these artificial airways are also routinely exchanged at some institutions. There however remains a critical need to understand how an artificial airway exchange alters the bacterial environment of these patients in sickness and in health. This research hypothesizes that exchanging an artificial airway will alter the microbiome of the artificial airway, by altering the microbial diversity and relative abundance of different bacterial species of the artificial airway. This study will involve the prospective collection of tracheal aspirates from patients with artificial airways. We will screen and enroll all patients admitted to a the NICU or PICU at Cohen Children's Medical Center (CCMC) who have tracheostomies and obtain tracheal aspirates within 72 hours before and after tracheostomy or endotracheal tube exchange. Tracheal aspirates are routinely obtained in the NICU and PICU from suctioning of an artificial airway and is a minimal risk activity. These samples will be brought to the Feinstein Institutes for Medical Research for 16 s ribosomal DNA (16srDNA) sequencing, which allows for accurate and sensitive detection of relative abundance and classification of bacterial flora. Tracheal aspirate sets will be analyzed against each other. Additionally, clinical and epidemiological data from the electronic medical record will be obtained. Antibiotic exposure will be accounted for via previously published means.
The objectives of this study are to analyze the oral microbiome modulations occurring during the transition from partial (with some residual teeth) to full edentulous (without remaining teeth) status and implant placement in subjects affected by severe periodontitis; to evaluate if microbiome changes in relation to the used of different implant material/surface; and to assess the variance of the changes to determine the sample size for future longitudinal prospective studies.
Arginine is an adjunct to oral health care that has the potential to modulate the composition and activity of the microbial community of dental biofilms towards a health-related status without harmful effects for the resident oral microbiota. The aim of the study is to investigate the effects of arginine treatment compared to placebo on the composition, metabolism, and microarchitecture of biofilms grown in situ in the oral cavity of caries-active participants.
The goal of this clinical trial is to understand varying in responses to different dietary patterns in healthy people who are getting a health screening colonoscopy. The main questions it aims to answer are: - What is the variability in the change of the microbes in the gut of (1) a provided diet that is high in fiber vs (2) a diet of the participant's choice. - What is the magnitude of fasting changes in glucose and lipids following the short-term, high-fiber feeding period and identify candidate predictive factors (short-chain fatty acids, BMI, sex, starting glucose level) for these changes Participants will be in one of two groups: 1. High-fiber diet group: These participants will have a series of measurements that include: blood biochemistries, body composition measured via DEXA, anthropometrics, surveys and questionnaires, and collection of fecal samples. 2. Normal diet group: These participants will eat a diet that is of their choosing (ad libitum) and will have a series of measurements that include: fecal samples, and questionnaires/surveys including food records.
The goal of this clinical trial is to evaluate the feasibility of remote time-restricted eating (TRE) and mindfulness-based stress reduction (MBSR) interventions and the preliminary effect on EOCRC-related markers. The main question[s] it aims to answer are: - Is it feasible and acceptable to conduct 8-week remote interventions of TRE, MBSR, and combined TRE+MBSR among young adults with excess adiposity and moderate-to-severe perceived stress? - Will participants in the combined group lose more body weight and reduce their stress levels than those in the remaining groups? - Will participants in the combined group experience better body composition changes and improve their cardiometabolic health compared to those in the remaining groups? - Will participants in the combined group exhibit changes in the microbiome compared to those in the remaining groups? Participants will: - Complete 8 weeks of a TRE intervention - Complete 8 weeks of a remote MBSR intervention Researchers will compare 1. TRE alone; 2. MBSR alone; 3. TRE + MBSR; and 4. Control to see if the study is feasible and acceptable; to see if individuals lose body weight; to see if individual stress levels reduce; to see changes in the microbiome.
Babies and children have an increased risk of getting an infection with a bacteria in the bloodstream (sepsis). It is often difficult for the doctor to determine whether a child has an infection of the bloodstream, because the symptoms are often unclear and can also occur in children who are not sick. To determine whether there is an infection, a little blood is currently taken for a blood test (the blood culture) to investigate whether there is a bacteria in the blood. However, it often takes at least 36 hours before the results of this blood culture are available. That is why antibiotics are usually started immediately to treat the possible infection. However, it often turns out that the blood culture is negative after 36 hours, which means that no bacteria have been found in the blood. Usually the antibiotics are then stopped because it turns out that there was no infection at all. There is currently no good test that can predict whether (newborn) children have an infection or not. That is why too many children are currently wrongly receiving antibiotics. These antibiotics can damage the healthy bacteria in the intestines. There are many billions of 'beneficial bacteria' in the intestine. These play an important role in the digestion of food and protect against external infections. Antibiotics aim to kill bacteria that cause inflammation or infection. Unfortunately, antibiotics also kill some of these beneficial bacteria. In addition, unnecessary use of antibiotics contributes to antibiotic resistance. The aim of this research is to investigate whether Molecular Culture, a PCR based test that can identify bacterial pathogens in bodily fluids within 4 hours, has greater accuracy than traditional culturing techniques for bacteria in blood. If proven, this could lead to faster identification or exclusion of sepsis in children.
Cardiogenic shock is associated with a high mortality. The microbiome is a double-edged sword which can convey protective and detrimental cardiovascular effects. The significance of the enteral micobiome on cardiovascular mortality of patients with cardiogenic shock is still not known. This study aims to provide a deeper understanding of the role of the enteral microbiome and microbiome dependent metabolites in mortality and disease progression of patients with cardiogenic shock.
This research is a clinical trial aimed at improving the gut microbiome of patients with Irritable Bowel Syndrome (IBS) through a temple stay experience. Participants in the study are expected to participate in a temple stay experience for a maximum of 8 days. During the temple stay experience, participants are required to fill out a daily symptom questionnaire related to irritable bowel syndrome and record their diet and bowel movements using a dedicated mobile application. Upon completion of the temple stay, participants will conduct an evaluation of personal satisfaction with the experience. Through this, the study aims to collect and analyze data related to the Templestay experience with the goal of improving the gut microbiome of patients with IBS.