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Clostridium difficile: A common inhabitant of the colon flora in human infants and sometimes in adults. It produces a toxin that causes pseudomembranous enterocolitis (Enterocolitis, Pseudomembranous) in patients receiving antibiotic therapy.

Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System

1Division of Gastroenterology, Case Western Reserve University School of Medicine, Cleveland, 2Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, 3Digestive Health Research Center, Case Western Reserve University School of Medicine, Cleveland

JoVE 50843


 Medicine

A Method to Assess Bacteriocin Effects on the Gut Microbiota of Mice

1Departamento de Biotecnología, Instituto de Agroquímica y Tecnología de Alimentos (IATA), Consejo Superior de Investigaciones Científicas (CSIC), 2Department of Food Safety and Infection Biology, Norwegian University of Life Sciences (NMBU), 3Departamento de Nutrición, Bromatología y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad Complutense de Madrid (UCM), 4Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences (NMBU)

JoVE 56053


 Biology

Gram Staining of Bacteria from Environmental Sources

JoVE 10092

Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - Arizona University
Demonstrating Author: Luisa Ikner

The spectrum of research in environmental microbiology is broad in scope and application potential. Whether the work is bench-scale with known bacterial isolates, or in the field collecting soil or water samples containing unknown bacterial isolates, the ability to quickly and visually discern culturable populations of interest remains of great import to environmental microbiologists even today with the abundance of molecular techniques available for use. This video will demonstrate one such technique, known as Gram staining.


 Environmental Microbiology

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Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor

1Bioprocesses Department, Laboratory of Environmental Biotechnology, Unidad Profesional Interdisciplinaria de Biotecnología, Instituto Politécnico Nacional, 2Laboratory of Molecular Biology, Escuela Superior de Medicina, Instituto Politécnico Nacional

JoVE 52956


 Environment

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Manual Isolation of Adipose-derived Stem Cells from Human Lipoaspirates

1Cytori Therapeutics Inc, 2Division of Cardiac Surgery, Department of Surgery, David Geffen School of Medicine at UCLA, 3Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine at UCLA, 4Department of Orthopedic Surgery, David Geffen School of Medicine at UCLA, 5Regenerative Bioengineering and Repair Laboratory, David Geffen School of Medicine at UCLA

JoVE 50585


 Biology

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Legionella pneumophila Outer Membrane Vesicles: Isolation and Analysis of Their Pro-inflammatory Potential on Macrophages

1Institute for Lung Research, Universities of Giessen and Marburg Lung Center, Philipps-University Marburg, 2German Center for Lung Research, 3Department of Medicine, Pulmonary and Critical Care Medicine, University Medical Center Giessen and Marburg

JoVE 55146


 Immunology and Infection

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Ultrasound-guided Botulinum Toxin-A Injections: A Method of Treating Sialorrhea

1Clinical and Biological Sciences Department, Neurology Unit, University of Torino, San Luigi Gonzaga Hospital, 2Oncology Department, Radiology Unit, University of Torino, San Luigi Gonzaga Hospital, 3Clinical and Biological Sciences Department, Dietologic and Nutrition Unit, University of Torino, San Luigi Gonzaga Hospital

JoVE 54606


 Medicine

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A High Content Imaging Assay for Identification of Botulinum Neurotoxin Inhibitors

1Perkin Elmer Inc., 2Henry M. Jackson Foundation, 3The Geneva Foundation, 4ORISE, 5Frederick National Laboratory for Cancer Research, 6Division of Molecular and Translational Sciences, US Army Medical Research Institute of Infectious Diseases, 7DoD Biotechnology High Performance Computing Software Applications Institute (BHSAI), Telemedicine and Advanced Technology Research Center (TATRC), US Army Medical Research and Materiel Command (USAMRMC)

JoVE 51915


 Neuroscience

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Community DNA Extraction from Bacterial Colonies

JoVE 10218

Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - Arizona University
Demonstrating Author: Luisa Ikner

Traditional methods of analysis for microbial communities within soils have usually involved either cultural assays utilizing dilution and plating methodology on selective and differential media or direct count assays. Direct counts offer information about the total number of bacteria present, but give no information about the number or diversity of populations present within the community. Plate counts allow enumeration of total cultural or selected cultural populations, and hence provide information on the different populations present. However, since less than 1% of soil bacteria are readily culturable, cultural information offers only a piece of the picture. The actual fraction of the community that can be cultured depends on the medium chosen for cultural counts. Any single medium will select for the populations that are best suited to that particular medium. In recent years, the advantages of studying community DNA extracted from soil samples have become apparent. This nonculture-based approach is thought to be more representative of the actual community present than culture-based approaches. In addition to providing information about the types of populations present, this


 Environmental Microbiology

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Establishment of Cancer Stem Cell Cultures from Human Conventional Osteosarcoma

1Department of Surgery and Translational Medicine (DCMT), University of Florence, 2Neurofarba Department, University of Florence, 3Department of Traumatology and General Orthopedics, Azienda Ospedaliera Universitaria Careggi

JoVE 53884


 Cancer Research

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Isolation of Myeloid Dendritic Cells and Epithelial Cells from Human Thymus

1Department of General Neurology, Hertie Institute for Clinical Brain Research, 2Institute of Pharmacology, University of Bern, 3Department of Immunology, University Medical Center Hamburg-Eppendorf, 4Department of Thoracic and Cardiovascular Surgery, University Clinic Tuebingen, 5Department of Neurology, University Hospital Erlangen

JoVE 50951


 Immunology and Infection

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Induction of Paralysis and Visual System Injury in Mice by T Cells Specific for Neuromyelitis Optica Autoantigen Aquaporin-4

1Department of Neurology, University of California, 2Program in Immunology, University of California, 3Department of Neurology and Neurological Sciences, Stanford University, 4Department of Pathology, Stanford University

JoVE 56185


 Immunology and Infection

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A Unified Methodological Framework for Vestibular Schwannoma Research

1Eaton Peabody Laboratories, Department of Otolaryngology, Massachusetts Eye and Ear, 2Department of Otolaryngology, Harvard Medical School, 3Department of Otolaryngology, Vienna General Hospital, Medical University of Vienna, 4Program in Speech and Hearing Bioscience and Technology, Harvard Medical School

JoVE 55827


 Cancer Research

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