Bacterial Diseases of Fish by Robert B. Moeller Jr.‚ DVM California Animal Health and Food Safety Laboratory System University of California Aeromonas hydrophila (Bacterial Hemorrhagic Septicemia) 1. Gram negative motile rods 2. Effects many freshwater species and usually is associated with stress and overcrowding. 3. The clinical signs and lesions are variable. The most common finding is hemorrhage in skin‚ fins‚ oral cavity and muscles with superficial ulceration of the
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HUMAN ENVIROMENTAL HAZORDS 1 Human Environmental Hazards HUMAN ENVIROMENTAL HAZORDS 2 Human Environmental Hazards The four major categories of human environmental hazards are Cultural Hazards‚ Biological Hazards‚ Physical Hazards‚ and Chemical Hazards.
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1. Ceftriaxone Sodium 1g IV Fig. 1.1 Ceftriaxone (Rocephin) It inhibits the cell wall synthesis promoting osmotic instability‚ usually bactericidal. It hinders or kills bacteria. Ceftriaxone sodium is a broad-spectrum bactericidal cephalosporin antibiotic. Ceftriaxone is active in vitro against a wide range of Gram-positive and Gram-negative organisms‚ which include β-lactamase producing strains. Ceftriaxone is indicated in the treatment of the following infections either before the infecting
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What is the infectious agent (pathogen) that causes this infectious disease? Hepatitis A is cause by the Hepatitis A virus. The Hepatitis A virus causes an inflammation of the liver. Hepatitis Immunization‚ Havrix‚ VAQTA. Hepatitis is an acute infectious disease that can harm the liver. Several diseases of the liver‚ collectively known as hepatitis‚ are caused by viruses. The viruses involved‚ five of which have been reasonably well characterized‚ come from a wide range of virus families. Hepatitis
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Staphylococcus epidermidis is one of the most prevalent microorganisms found on the human skin and in the mucous membranes‚ however‚ it is a typically overlooked bacterium because there is very little that is known about it. Though it is not as aggressive as its cousin Staphylococcus aureus‚ Staphylococcus epidermidis is the most frequent cause for nosocomial pathogens‚ especially among newborns‚ the elderly‚ and anyone who has a compromised immune system. These infections are usually associated
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Unknown Microorganisms May 1‚ 2013 This paper is based on an experiment done in the laboratory over a period of time using the standard method of identifying an unknown microorganism relying on features such as morphology‚ arrangements and biochemical reactions. It was done in succession with each step complimenting the other. At the end of the experiment three microorganisms Bacillus azotoformans‚ Staphylococcus aureus‚ and Escherichia coli was identified and one result was inconclusive. The
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19th Century Medicine Robert Koch (1834) Koch worked on anthrax and tuberculosis (TB) and developed work of Louis Pasteur. Koch first investigated Anthrax (that affected herds of farm animals and farmers.) In 1868 Davaine had proved that a healthy animal that did not have anthrax could get the disease if it was injected with blood containing Anthrax. Koch developed this work further. Koch found out that Anthrax microbes produced spores that lived for a long time after an animal had died and these
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The Journey from Spontaneous Generation to Biogenesis Redi‚ Leeuwenhoek‚ Needham‚ Spallanzani‚ and Pasteur changed the way we think about life by trying to prove and disprove Spontaneous Generation or the idea that life could arise from nonliving matter. Redi disproved Spontaneous Generation. He only believed in Biogenesis which is that all life comes from life. Needham believed in Spontaneous Generation and wanted to prove it. Spallanzani wanted to know what caused microbes. Pasteur put an end
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How important was the role played by Edwin Chadwick in improving public health services in the C19th? Edwin Chadwick was important in improving public health as his work illustrated the problems‚ such as pollution from factories and a lack of clean water‚ associated with the majority of towns in the Industrial revolution. However‚ his impact was not the only factor that had influence on public health; other individuals‚ the government and public attitudes were also significant in changing the
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Title: Staining Introduction: Microorganisms are small and colorless‚ invisible to unaided eyes. When observing them under microscopes‚ we use various methods to make microbes apparent. One of the most important methods is staining. Staining techniques play an essential role in the studying of microorganisms; they help to reveal characteristics of microbes‚ such as their morphologies‚ sizes‚ arrangements‚ chemical components and many more. The purposes of the experiments are to be
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