Bacillus Cereus Bacillus cereus is a rod-shaped gram- positive bacillus that can be found in food‚ dust‚ dirt and sometimes soil. It is an aerobe and a facultative anaerobe that can form spores‚ which if activated at any point can begin to germinate and produce toxins. These spores that form from B. cereus are be resistant to heat and chemicals. B. cereus is found in approximately 25% of food sampled (3). Foods that are commonly associated with B. cereus are potatoes‚ rice‚ meat‚ vegetables
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themselves to substrate molecules and lowering the activation energy of a reaction (Alberts et.al‚ 2010 p.90). The purpose of the lab was to test how temperature will affect the rate at which starch hydrolyzed. In the experiment conducted‚ bacterium; Bacillus Licheniformis and the fungus; Aspergillus Oryzae was used to examine how changes in temperature of the enzymes affects the rate of the reaction with starch. Amylase is an enzyme‚ found chiefly in saliva and pancreatic fluid‚ that converts starch
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To identify an unknown bacteria‚ there are many tested that have to be performed. By keeping record of each test it is relatively easy to compare it to the outcome of other organisms in order to better determine which bacteria you have. When performing these tests and recording them I have realized that you may not always get the same results from your unknown as your organism you think it may be. That is why eighteen different tests are performed so that you can compare your results with the table
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Bacillus‚ Mycoplasma‚ and Escherichia In a clinical setting signs and symptoms can lead a care taker down a treatment path‚ but if a bacterial infection is suspected‚ a definitive answer from the “lab” is needed before prescribing medications. In this instance a yellow sputum was produced by the patient‚ which will be taken to the lab an analyzed under a microscope. There are three suspect bacteria‚ which are Bacillus‚ Mycoplasma‚ and Escherichia. A discussion of staining procedures‚ as well as
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UNKNOWN LAB REPORT UNKNOWN NUMBER 54 Ron Williams 7-28-05 Bio 205 Prof. Curlee Fall 2005 Purpose There are many reasons for knowing the identity of microorganisms. The reasons range from the knowing the causative agent of a disease in a patient‚ so as to know how it can be treated‚ to knowing the correct microorganism to be used for making certain foods or antibiotics. This study was done by applying all of the methods that have been learned so far in the microbiology laboratory
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INTRODUCTION Bacillus anthracis has recently become popular as the causative agent of anthrax infections. Belonging to the bacillus species‚ the bacterium is considered‚ along with Bacillus cereus‚ to be of extreme medical importance. Until recently‚ the condition caused by the bacterium was rarely heard of. Although the bacterium is naturally found in the soil‚ its rare occurrences in humans have only been observed in those working with livestock or imported livestock products‚ therefore the
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Microbiology Coursework: Bacillus cereus After investigation following on outbreak of food poisoning at a pizza restaurant‚ it was found that all suffers had consumed a portion of side salad from the self-service salad bar alongside their main dish. Subsequently‚ this was further traced to a rice salad. Environmental Health Officers investigating this outbreak suspected it may have been caused by Bacillus cereus (B. cereus). The presence of large numbers of B. cereus in a food is indicative
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Chris Brunelle Biology 112-online Professor Gaskin September 10‚ 2014 Minimal Organism “A minimal genome is generally defined as the smallest set of genes that allows for replication of the organism in a particular environment (Cho‚ M.‚ 1999). The creation of these minimal genomes can be helpful and harmful at the same time. There are many opinions out there about the subject‚ I will share some of those and my position on the subject. First let me just start with my personal position on minimal
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Discussion The possible identity of the unknown organisms in the mixed culture was limited to bacteria that we had worked with previously in lab. Initially a Gram stain was conducted in order to distinguish the unknown bacterium as a Gram-positive and/or a Gram-negative organism (Lancaster and Bennett‚ 2012; Kellenberger‚ 2001). Based upon the results‚ both Gram-negative and Gram-positive bacteria were observed in the unknown mixed culture (Table 1 and Table 2; Kellenberger‚ 2001). In order
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Introduction: Biological organisms are classified uniformly in order to easily categorize and identify organisms. This classification‚ or taxonomy‚ uses the genus name followed by the species name‚ in Latin. By having a universal method of identifying bacteria allows for all scientists from any part of the world to identify the same species in an identical manner allowing for a precise of classification. Bacteria are distributed throughout the world in almost every conceivable habit. Bacteria are
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