are simple organisms that are unicellular or live in colonies. The group contains bacteria‚ virus‚ algae‚ fungi‚ protozoa. They can be divided into pathogenic and non-pathogenic. In this passage pathogenic microorganisms that cause diseases are concerned. A disease is an abnormal condition affecting the body of an organism. Some of them called infectious diseases such as common cold‚ influenza‚ etc. Pathogenic microorganisms: SARS coronavirus SARS coronavirus is an air-borne virus causes a
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diffusion. • The Monera kingdom includes all bacteria that may infect animals‚ humans and plants. But most of the members are termed as beneficial bacteria‚ rather than pathogenic bacteria. • The Monerans kill organisms causing pathogenic diseases‚ breaks down algae and can even recycle chemical pollutants like hydrogen sulfide and ammonia. • Bacteria that grow in the root nodules help break down atmospheric nitrogen into fixed nitrogen‚ • The bacteria that forms the natural flora of the intestines
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infectious. Infectious diseases are caused by bacteria‚ viruses‚ fungi and parasites that use our body as a host for reproduction and cause illness. Bacteria‚ viruses‚ fungi and parasites. These are all microorganisms which cause infection‚ yet they are all different in structure‚ required environment and conditions needed to thrive and multiply. Bacteria is a single celled organism. It’s shape and size can vary greatly from one type of bacteria to another‚ but its general structure is that
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1.1 and 1.2 Bacteria - are micro-organisms that consist of only one cell. Bacteria multiply by splitting themselves in two‚ which is called a binary fission. Because of this they can increase in number rapidly. The majority are harmless‚ but some can be pathogenic which results in bacterial infection occuring. Bacterial infections can be treated by using antibiotics. Bacteria can evolve a resistance to antibiotic e.g. MRSA. Some diseases caused by bacteria include tuberculosis‚ pneumonia‚ salmonella
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Pseudomonas syringae Finding a bacterium that I felt even a shred of confidence to discuss in a paper was no easy task‚ but while doing research I discovered this (probably more well-known than I realize) bacteria that had some properties that were incredibly interesting to me. The basic properties of Pseudomonas syringae is that it ’s gram-negative‚ has a rod-shaped morphology‚ and is an aerobic respirator. It ’s categorized as gram-negative due to crystal violet being washed away‚ and stained
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Microbial Mechanisms of Pathogenicity Mechanisms of Pathogenicity • Pathogenicity: • Virulence: Mechanisms of Pathogenicity Figure 15.9 Portals of Entry • Mucous membranes • Skin • Parenteral route Numbers of Invading Microbes • ID50: Infectious dose for 50% of the test population (animals) • Dose of pathogen that will infect half of the test animals • LD50: Lethal dose (of a toxin) for 50% of the test population (animals) • Dose of toxin that will kill half of the test
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probiotic strains used as commercial bacteria are safe to use in applications. The safety of the probiotic products is appraised with the phenotypic and genotypic characteristics and the statistics of used microorganisms (Çakır 2003). Safety aspects of probiotic bacteria include the following requirements. 1. Strains for human use are preferred to be human origin. 2. They are isolated from healthy human gastrointestinal tract. 3. They have to be non-pathogenic. 4. They have to no history of relationship
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Causes and spread of infection. Bacteria. These organisms are made up of just one cell. They have the power to divide so can multiply on their own. Some bacteria are harmless and can be of use in the aid of digestion and are found in the intestines. Other bacteria can be the cause of diseases. These bacteria have to find a way in to the body to be of harm and can make their way through the skin or be digested and attack our immune system. Viruses. These micro-organisms are very tiny. They invade
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CU254 1.1‚ 1.2. Bacteria Bacteria are single-cell organisms‚ they are living things that belong to a group of their own‚ and therefore they are not classed as animals or plants. They are usually only a few mm in length‚ can be spherical‚ rod or spiral shaped‚ contain a cell wall and normally exist together in millions. Bacteria can only reproduce asexually and does not contain a nucleus. Bacteria can be beneficial‚ but it can also be pathogenic (cause disease in humans). Examples of diseases
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Mucositis (in vitro studies) Defention: One of the most debilitating side effects of radiotherapy and chemotherapy treatment. It is characterized by both inflammation and cell loss in the epithelial barrier. Mucositis is a very complex condition: it develops as a series of dynamic interactions that begin in the epithelium but in a later stage involves other tissue mucosal components like the endothelium‚ extracellular matrix and connective tissue. It is a frequent reason to postpone chemotherapy
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