Adherence • Adhesins/ligands bind to receptors on host cells • Glycocalyx: Streptococcus mutans • Fimbriae: Escherichia coli • M protein: Streptococcus pyogenes • Form biofilms How bacterial pathogens penetrate host defense • • • • • • Capsules Cell wall components Enzymes Antigenic variation Penetration into the host cell cytoskeleton; invasin Intracellular growth Capsules • Prevent phagocytosis Streptococcus pneumoniae Haemophilus influenzae Bacillus anthracis Cell Wall Components
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Unit 2 Assignment Critical Thinking 1. Explain why‚ even under ideal conditions‚ Streptococcus grows slowly. Cellular respiration is a process in which glucose is broken down to form an energy that can be used by the cell. There is aerobic respiration and there is anaerobic respiration. Aerobic respiration involves a series of chemical reactions in which oxygen is used to transform into carbon dioxide and H2O. This process generates energy carrying molecules called ATP. Anaerobic respiration
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Melissa Babajko Microbiology 214BA Dr. May June 6‚ 2012 Staphylococcus aureus- Is a facultative anaerobic‚ Gram-positive‚ salt positive‚ cocci shaped bacterium. Staphylococcus aureus is found as normal part of the skin floral in the nasal passages and on the skin. An estimated twenty percent of people naturally have harmless Staphylococcus aureus on their skin and are long-term carries for Staphylococcus aureus. Staphylococcus aureus is the most common strand of Staphylococcus in humans to date
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accepted demonstration of bacterial transformation‚ where a bacterium distinctly changes its form and function. Griffith succumbed to his death around the year 1941 due to the air raid. His Purpose and what he derived? Griffith showed that Streptococcus pneumonia‚ could transform from one strain into a different strain. The observation was attributed to an unidentified transforming principle of transforming Factor. This was later identified as the stuff of life “DNA” The Experiment Griffith’s
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conduct could result to something catastrophic. Due to the nature of this proposed research‚ potential issues may arise since the resistant strain of Streptococcus pneumoniae is the key factor in the significant increase of morbidity and mortality rate globally. For instance‚ the proposed research of studying the resistant strains of the Streptococcus pneumoniae can lead to a potential new antibiotic (Science and Social Responsibility - Dual Use Research). Despite the many benefits that may derive
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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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BACTERIA Period: 4 Characteristics: 3 major shapes Cocci Basilli Spirilla 3 major components Mesosomes flagella Plasmids Growing Up: Bacteria can obtain energy through phototrophs(sunlight)‚ lithotrophs(inorganic compounds)‚ and organotrophs(organic compounds) Marriage/Reproduction Binary Fission: The process by which all bacteria reproduce. It results in the separation of a single cell into two. Transformation: genetic alteration
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http://www.innerbody.com/anatomy/cardiovascular/common-iliac-vein HealthTeacher (2012). “Respiratory System.” Retrieved from http://www.healthteacher.com/content/id/51/topic/11 Medical Dictionary (2012). Streptococcus. Retrieved from http://medical-dictionary.thefreedictionary.com/Streptococcus MedicineNet (2012). Definition of the Femoral Vein. Retrieved from http://www.medterms.com/script/main/art.asp?articlekey=10783 National Heart Lung and Blood Institute (2012). “What Causes Pneumonia.” Retrieved
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the germs it can also make it harder for the lungs to pass oxygen into the bloodstream. What causes pneumonia are many different kinds of bacteria‚ viruses and‚ occasionally‚ fungi can cause pneumonia. The most common cause is a bacterium called Streptococcus pneumoniae‚ but in individual cases of pneumonia the cause is often not known. Some of these bacteria can live in the nose or throat without causing problems‚ and in most cases it is not known why they then suddenly make people ill. Others can
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have been supplemented with 5% sheep red blood cells. BAP tests the ability of an organism to produce hemolysing enzymes that damage/lyses red blood cells (erythrocytes). The degree of hemolysis is helpful in differentiating members of the genera Streptococcus. Which Hemolytic activity‚ classified
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