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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Bonnie Bassler claims that bacteria although simple have complex systems that they use to communicate with each other to coordinate. This is crucial to humans because Dr. Bassler considers humans to be 90-99% bacterial. Dr. Bassler states we have about one trillion human cells but we have about 10 trillion bacterial cells that either live in or on humans. The number of bacterial genes in those cells outnumber humans by 100 times since humans only have 30‚000 genes. These bacteria share a mutualistic
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Aseptic Technique & Culturing Microbes Questions A. What is the difference between a bactericidal and bacteriostatic agent? What is the difference between sterilization and disinfection? Control of growth refers to the prevention of growth of microorganisms. This control is affected in two basic ways: by killing microorganisms or by inhibiting the growth of microorganisms
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Gram Positive Unknown: “Enterococcus faecalis” Family: enterococcaceae Genus: enterococcus Species: faecalis Gram + Oxygen class: facultative anaerobe Temperature class: mesophile – they can grow in the range of 10 °C - 45 °C pH class: can grow at a pH range of (4.6 – 9.9) with the optimum at 7.5 Enterococci can survive very harsh environments including extreme alkaline pH 9.6 and salt concentrations (basic). Environment: They can
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Pathogen Project #7 Salmonella 1) What type of microbe: G - bacterium 2) What is the natural habitat of your pathogen‚ that is‚ where does it reproduce or what is the reservoir? Animals are the main reservoir for Salmonella. It also lives on eggs‚ raw meats‚ unpasteurized milk‚ fruits‚ and vegetables. 3) What disease it causes – that is‚ the MAIN disease it causes: The primary disease Salmonella causes is gastroenteritis. Gastroenteritis causes bloating‚ abdominal cramping and most commonly
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In medical facilities it is necessary to equips materials and surfaces with a high level of hygiene using antimicrobial agents to protect them against bacteria and other micro organisms to prevent infections caused by bacteria and contribute significantly to reduce health costs. Benefits of nanoscale coatings in this sector include long lasting antimicrobial effect‚ constant release of the active substance‚ effectiveness against bacteria and other micro-organisms‚ no chemical impurities‚ easy processing
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ASSAYING PLANT SUBSTANCES FOR ANTIBACTERIAL ACTIVITY PURPOSE To test plant extracts to see if they possess antibacterial activity. PROCEDURE First create a list of plant extracts being tested and choose 2 extracts per group. The plants being tested are Oregano‚ Tea tree‚ Eucalyptus and Colloidal Silver. Obtain two nutrient agar plates and using a permanent marker draw four quadrants on the bottom of each agar plate. Using a sterile pipet transfer 250 ml of E. coli broth to the middle of
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Haemophilus influenza By Crystal Wade BL 202 A Dr. Kokan 11/10/2012 Haemophilus influenza is a gram negative rod shaped bacterium; it is a member of the pasteurellaceae family. It is aerobic but it can grow as a facultative anaerobe. From 1852 to 1933 H. influenza was thought to be the cause of influenza until its etiology was done and they discovered that it was really bacterial influenza that caused it. H. influenza does cause many other diseases. It states on Wikipedia that “H. influenza
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In September 1928‚ Fleming returned to his laboratory after a month away with his family‚ and noticed that a culture of Staphylococcus aureus he had left out had become contaminated with a mold (later identified as Penicillium notatum). He also discovered that the colonies of staphylococci surrounding this mold had been destroyed. He later said of the incident‚ "When I woke up just after dawn on September 28‚ 1928‚ I certainly didn’t plan to revolutionize all medicine by discovering the world’s
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Dannon Company has a trademark of Activia in its products. One of its products is the Light and Fit yoghurt. The light and fit comes in variety of flavors‚ raspberry‚ banana and strawberry just to name a few‚ with no artificial color and a natural touch. This product is advertised to be multi- functional with its great works with women’s gastrointestinal hygiene and beauty. The product is said to bring about what people want from any food supply. The company is mostly targeting young ladies‚ middle
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