GRAM STAIN THEORY: The most widely used staining procedure in microbiology is the Gram stain‚ discovered by the Danish scientist and physician Hans Christian Joachim Gram in 1884. Gram staining is a differential staining technique that differentiates bacteria into two groups: gram-positives and gram-negatives. The procedure is based on the ability of microorganisms to retain color of the stains used during the gram
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Biology 205 MW 2:10pm. Unknown Organism Paper The unknown organism tested in the Mesa lab was collected from in between the toes of my puppy‚ Riley. The original culture grown consisted of dozens of visibly different organisms of varying colony colors and growth patterns. I chose to test a smaller‚ red colony for my experiments. Based on its gram reaction and oxygen requirements‚ the following tests were performed to reach my presumptive ID: Test Performed Result Gram Stain + Fluid Thioglycollate
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Gram staining From Wikipedia‚ the free encyclopedia A Gram stain of mixed Staphylococcus aureus (Staphylococcus aureus ATCC 25923‚ Gram-positive cocci‚ in purple) andEscherichia coli (Escherichia coli ATCC 11775‚ Gram-negative bacilli‚ in red)‚ the most common Gram stain reference bacteria Gram staining (or Gram’s method) is a method of differentiating bacterial species into two large groups (Gram-positive and Gram-negative). The name comes from its inventor‚ Hans Christian Gram. Gram staining
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Lab #1 (16th October‚ 2012) Safety in the Microbiology Lab * Clinical specimens received from patients pose a hazard to personnel health because of the infectious agents they may contain. * Spurred by the spread of HIV/AIDS‚ the CDC has recommended safety precautions concerning the handling of patient materials by health care workers. * Universal precaution (or blood and body fluid precaution). * Emphasis on good knowledge and common sense. * Safety is everybody’s business
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and tables explain the differences between Viruses‚ Bacteria‚ Cyanobacteria‚ Achaea and Fungi. Bacteria or bacterium are unicellular microorganisms. They are essentially only a few micrometres long and form of various shapes including the spheres‚ rods and spirals. A BACTERIAL CELL Illustration courtesy of Wikipedia. A Virus (from the Latin noun virus‚ meaning toxic or poison) is a sub-microscopic particle that infect the cells of a biological organism. Illustration courtesy of mc3cb
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Introduction The purpose of this lab was to identify unknown bacteria cultures using various differential tests‚ and my unknown bacteria is #17. The identification of these unknown cultures was accomplished by separating and differentiating possible bacteria based on specific biochemical characteristics. Whether the tests performed identified specific enzymatic reactions or metabolic pathways‚ each was used in a way to help recognize those specifics and identify the unknown cultures. The differential tests
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GRAM STAINING EXPERIMENT CONDUCTED ON 9/29/2013 Introduction: The Gram stain is a useful stain for identifying and classifying bacteria. The Gram stain is a differential stain that allows you to classify bacteria as either gram positive or gram negative. This gram stain technique was discovered by Hans Christina Gram in 1884. The gram stain procedure separates all bacteria into one of two groups - into gram-negative bacteria which do not stain purple and into gram-positive
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Microbiology Laboratory(TFMB1001) Report Experiment Tittle Gram stain Experiment Date 24October2014 Submission Date 31October2014 Students Name Tittle Gram stain. Objectives Aim of this experiment is to differentiate between the two major categories of bacteria ‚ gram positive and gram negative. Through this experiment‚ gram staining skills develop. More understanding the types and morphology of bacteria. Expected experimental result‚ Escherichia coli (E.coli ) is a negative gram bacteria
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Preliminary Unknown Report Alexis Grettenberger 800503431 Katie Young Alexis Grettenberger Biol 311 Lab 11/21/14 Preliminary Unknown Report Purpose: The purpose of this experiment was to identify a specific unknown bacterium that was isolated from a multitude of bacteria in a sample of contaminated dirt by running it through a series of identification techniques. Some of these techniques were simple staining‚ gram staining‚ and isolation techniques. The hypothesis of this experiment was that
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Disposition/Food Safety: Overview of Food Microbiology July 8‚ 2011 Overview of Food Microbiology OBJECTIVES At the end of this module‚ you will be able to: 1. Explain the structural similarities and/or differences among Gram-positive and Gram-negative bacteria as well as their isolation and identification using serological‚ biochemical‚ and molecular techniques. 2. Identify the functions of the bacterial cell wall. 3. Identify the extrinsic and intrinsic parameters that affect bacterial growth
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