Food poisoning occurs when a bacterium that is in food is prompted to grow and reproduce. Bacteria thrive in warm temperatures and an environment full of moisture. When the conditions are right‚ bacteria can grow from one to several million in just eight hours. The problem arises when instead of producing millions of bacteria‚ there is less but more toxic bacteria or there are a huge amount of bacteria that cause the problems inside the body. For example‚ Jill comes home after school and she
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The world is exist with germs of all kinds especially viruses and bacteria. Most of the time human bodies do a wonderful job of fending off these microbes. This sort of self-defense is due to the immune system‚ which detects any pathogen also known as disease-causing agent and attacks it with immune foot soldiers including macrophages‚ lymphocytes and phagocytes. Specifically‚ over 700 different strains of bacteria have been discovered in the human mouth‚ though most people are only host to 34 to
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Did you know‚ food poisoning has increased dramatically in the last ten years? This makes it much more important for vigilance by food businesses. Since 1965 the cases of food-borne illness has increased from 20‚000 to just short of 100‚000 now. There has been no single reason identified to why this number has increased‚ but this could be because of: Changes in eating habits‚ a greater reliance on re-heated food. Eating out is much more popular now‚ so more people are aware of food hygiene‚ therefore
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CONTENT A. BRIEF PRESENTATION OF THE CASE B. POINT OF VIEW I. INTEGRATED SCIENCE(Interaction: Environment and organism) II. COURSE PAPER: CASE STUDY Bacteria constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length‚ bacteria have a wide range of shapes‚ ranging from spheres to rods and spirals. Bacteria were among the first life forms to appear onEarth‚ and are present in most habitats on the planet‚ growing in soil‚ water‚ acidic hot springs‚ radioactive
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"TB") is a disease caused by the bacteria Mycobacterium tuberculosis which infects white blood cells. It mainly infects the lungs‚ although it can affect other organs as well. TB is spread through the air from one person to another. The bacteria are put into the air when a person with active TB disease of the lungs or throat coughs or sneezes. People nearby may breathe in these bacteria and become infected. When a person breathes in TB bacteria‚ the bacteria can settle in the lungs and begin
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Bacteria have to developed a variety of mechanisms that allow them to enter the cells of their host‚ whether to replicate or to transmit the pathogen. One method of this is through pili. Pili are thin rods anchored to the outer membrane of bacteria with an adhesin at the tip. This adhesin is what gives the bacteria their binding specificity. Pili can serve a variety of roles such as‚ adhesion or the transfer of material during bacterial conjugation. Fimbria are a type of pili that are solely for
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how they helped with discovering translation‚ these three experiments help lead to the discovery of DNA. Before Frederick Griffith’s experiment‚ no one knew anything about DNA or what it was. Frederick Griffith studied two types of Pneumococcus bacteria‚
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others were even more specific and used only for cocci bacteria .The first procedure have been done was to observe and record the morphology of the unknown sample. However‚ Gram stain should be done to be sure that unknown sample were gram positive and to identify cells morphology. After that biochemical tests were chosen for unknown identification . first of all was done the catalase test to differentiate between the two types of cocci bacteria ( Staphylococcus and Streptococcus ) . Since unknown
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or fluid appearance is visible. Bacteria and background don’t have a much of difference in color. Although‚ bacteria are defined and visible noted. Most of the time they are single round cells. In direct stain with crystal violet‚ again background is colorless and glossy. Bacteria is blue and some uneven grouping is noted. In this example the dye methylene blue stain is used. In indirect stain with Congo red stain‚ background is again colorless and glossy. Bacteria are orange to red and fine defined
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toothpaste to oral bacteria VS the effect of mouthwash to oral bacteria Problem: Bacteria in ones’ mouth causes many problems for oneself in the future. For example‚ gum diseases‚ bad breath‚ etc..‚ Toothpaste and mouthwash is promised to kill most of the bacteria in one’s mouth‚ but which is more effective at killing the bacteria and preventing future problems? This experiment and research is going to prove which is more effective at killing oral bacteria. Purpose:
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