DELA CRUZ‚ CYNTHIA GRACE C. 2008-13749 FS 125 March 10‚ 2012 ANTIMICROBIAL AGENTS 1. Introduction Food preservation has long been practiced since the olden times with processes such as heating ‚ drying‚ fermentation and refrigeration. In spite of this‚ physical methods are not enough to eliminate all microorganisms found in foods. Therefore‚ antimicrobial agents are needed to destroy these foodborne pathogens‚ so that the food will have a longer shelf-life. As technology progresses‚ improvements
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biofilms When bacteria is threatened by antibiotics treatment that can kill them‚ or when a strong immune system responses to bacteria and produce cytokines or other agents to eliminate it from the body‚ Bacteria has the choice of either staying as individual and die or change their form to make biofilms. Biofilms are communities or bacteria binds together in large groups and make a sticky mesh to make themselves resistant against antibiotics. Some drug that can kill single bacteria will not
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Listeriosis Although there are countless types of infectious diseases around the world‚ a great majority of them are preventable. Infectious diseases are disorders caused by organisms such as bacteria‚ viruses‚ fungi or parasites (Mayo Clinic‚ 2016). Listeria is not a commonly mentioned disease‚ however it has the potential to be deadly when not identified or serious symptoms are overlooked. This foodborne‚ infectious disease is caused by a gram stain-positive motile bacterium named Listeria
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Cellulitis is a bacterial infection that affects the skin and the tissue underneath the skin. Although cellulitis can be caused by many types of bacteria‚ streptococcus and staphylococcus are the main bacteria that cause this condition. Cellulitis often develops near surgical wounds or ulcers. This condition causes the skin to become reddened and swollen. It also causes the area to feel tender and hot. Cellulitis can quickly spread to other areas of the body. It is not contagious. Cellulitis can
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Typical layering used to create a pair of high-grade sunglasses Sunglasses use a variety of technologies to eliminate the problems with light. different technologies currently use:Tinting Polarization Photochromic lenses Mirroring Scratch-resistant coating Anti reflective coating UV coating Tinting The color of the tint determines the parts of the light spectrum that are absorbed by the lenses. Manufacturers use different colors to produce specific results. Gray tints are great all-purpose
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Equipped with a powerful tail‚ a massive jaw adorned with jagged teeth‚ and an armored body all infused with lethal instincts‚ it is no wonder why alligators are reminiscent of a time when dinosaurs ruled. Yet these apex predators are more than mere relics of the distant past. They may just hold the key to unlocking some of the medical community’s most complex dilemmas. Alligators frequently wear serious injuries as battle medallions when fighting for territory and mates. During conquests‚ it is
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Introduction: There are times when it is necessary to go through something both inside and outside‚ literally‚ to learn. This was exactly the case with virtual lab #11 where the experiment called for an examination of an earthworm’s exterior anatomy and interior anatomy. The earthworm as a whole is considered the dependent variable as we cannot change it. However‚ the labels to be placed can be moved so they are the independent variables. My hypothesis is quite elementary. I believe that after studying
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There are several genera of micro-organisms related to contact lens storage case contamination. Unlike CL contamination which is bacterial in nature‚ storage case contamination is often polymicrobial.(Larkin et al. 1990; Gray et al. 1995) Gray et al found that bacterial contamination is common in 77% of lens cases‚ followed by contamination with fungi (24%) and then protozoan (20%). Most commonly found organisms include Pseudomonas aeruginosa‚ Staphylococcus spp‚ Acanthamoeba spp and Fusarium species
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In general‚ members of the genus Vibrio are Gram-negative‚ motile and most of the members have a single polar flagellum‚ when grown in liquid medium (Kaysner & DePaola‚ 2004). Vibrio cholerae lives naturally in riverine and is the causative agent of cholera outbreaks and epidemics. Vibrio cholerae is comma-shaped. Initial isolates are slightly curved‚ whereas they can appear as straight rods upon laboratory culturing. Vibrio cholerae is a facultative anaerobe and can undergo respiratory and fermentative
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I enjoyed doing the virtual lab. I treat water as an occupation so I understood how and what to add to treat the water. If you have a low (acidic) pH then you should add sodium hydroxide. If you have total coliforms‚ you should chlorinate before and after treatment. Often‚ we test houses for total coliforms and e. coli. If the bacteria is positive‚ then we chlorinate the well. After we make sure all the chlorine is throughout the house‚ we let it sit for 24 hours to disinfect the pipes and
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