INFECTION An infection is the colonization of a hostorganism by parasitespecies. Infecting parasites seek to use the host’s resources to reproduce‚ often resulting in disease. Colloquially‚ infections are usually considered to be caused by microscopic organisms or microparasites like viruses‚ prions‚ bacteria‚ and viroids‚ though larger organisms like macroparasites and fungi can also infect. Hosts normally fight infections themselves via their immune system. Mammalian hosts react to infections
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Chain of Infection As described above‚ the traditional epidemiologic triad model holds that infectious diseases result from the interaction of agent‚ host‚ and environment. More specifically‚ transmission occurs when the agent leaves its reservoir or host through a portal of exit‚ is conveyed by some mode of transmission‚ and enters through an appropriate portal of entry to infect a susceptible host. This sequence is sometimes called the chain of infection. Figure 1.19 Chain of Infection Image
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December 10‚ 2010 Microbiology Chain of Infection Link 1: The Organism (10 pts) Scientific name: Infectious mononucleosis Common name of disease: mono; also‚ the kissing disease Characteristics: [bacteria/virus/parasite‚ toxins‚ anaerobe/aerobe‚ etc] Mononucleosis is a lymphatic system disease‚ usually caused by the Epstein-Barr virus (EBV) (first cultured by Michael Epstein and Yvonne Barr). A similar condition is often caused by the
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UNIT 22 INFECTION CONTROL OUTCOME 1 UNDERSTAND THE CAUSES OF INFECTION 1.1 Bacteria are one celled micro-organisms that get their nutrients fro their environment to live eg: The human body. Bacteria causes infections and can reproduce either inside or outside the body. Viruses are pieces of nucleic acid (DNA or RNA) wrapped in a thin coat of protein. Viruses need to be inside living cells to grow and reproduce. They do not survive long unless they are inside a living thing eg: person
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Infection Control Policy and Procedures Policy: Always wash your hands: * After using the toilet * After changing a diaper — wash the diaper-wearer’s hands‚ too * After touching animals or animal waste * Before and after preparing food‚ especially before and immediately after handling raw meat‚ poultry or fish * Before eating * After blowing your nose * After coughing or sneezing into your hands * Before and after treating wounds or cuts * Before
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developing a computer model of the spread of an infectious disease‚ the student develops an understanding of the role of the infection rate and the removal rate on the spread of the disease. The Threshold Theorem of Epidemiology claims that the extent of spread of an epidemic can be predicted if three values are known: initial number of susceptible people (S(0))‚ the infection rate (K)‚ and the removal rate (by quarantine or cure) (Q). The extent of the spread of the epidemic is indicated by the percentage
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Infection‚ as defined by Encyclopedia Britannica (2011)‚ is the invasion and multiplication of different pathogenic microorganisms in the body-such as fungi‚ bacteria and viruses- the body’s reaction to it and the defense mechanisms it activates to counter these pathogens or the toxins they produce. Infections can range from simple to complex ones that can be fatal or debilitating‚ but because of the continuous researches and studies to protect the human race‚ antibiotics were discovered. Antibiotics
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pressure. Bacteria- are tiny‚ one-celled forms of life that cause many diseases and infections. Bactericidal- An agent that destroys bacteria Bacteriostatic- Preventing bacteria from growing and multiplying but possibly not killing them. Cleaning- Cleaning using detergents helps to remove micro-organisms. Disinfection- Using specialized cleansing techniques that destroy or prevent growth of organisms capable of infection. Host- Immunity- The condition of being immune; the protection against infectious
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Causes and Spread of infection Q 1.1 - Identify the differences between: bacteria‚ viruses‚ fungi and parasites. * Bacteria are unicellular‚ prokaryotic microorganism found almost in all kinds of habits. Some bacteria are beneficial like those involved in nitrogen fixation and some pathogenic‚ which cause diseases. * Viruses are unicellular‚ tiny organisms which is mostly composed of DNA (DeoxyriboNucleic Acid) and protein. Its body
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Infection Prevention and Control Kathleen E. Haertel‚ Analysis of Nursing Research / Nur 518 April1‚ 2012 Mrs. Susan Steele- Moses Abstract Florence Nightingale was the first person to initiate the concept of infection prevention and control in Healthcare. Although she had no understanding about the science of asepsis‚ the research she did on the sanitary problems of the hospitals made her an unyielding advocate of pure water‚ pure air‚ cleanliness‚ efficient system of drainage
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