Staphylococcus Aureus Essay

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    Introduction: Staphylococcus aureus (S. aureus) is a spherical bacteria which is known to produce a cytotoxin called Panton-Valentine leucocidin (PLV) which destroys leukocytes, and kills tissue (Lina et al., 1999). Five percent of strains of Staphylococcus are known to produce the disease-causing toxin (Lina et al., 1999), but though the amount of PLV-producing strains is somewhat small, the strains which produce PLV are apparently resistant to vancomycin, an antibiotic commonly used to treat

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    Staphylococcus aureus is a leading cause of human bacterial infections worldwide1, and following the discovery and widespread utilization of antibiotics, S. aureus has evolved to become resistant to a number of antimicrobial treatments. Most notably, Methicillin-resistant Staphylococcus aureus (MRSA) strains have acquired the mecA gene, encoding the penicillin binding protein (PBP2a), which confers resistance to oxacillin and all β-lactam antibiotics 2. These characteristics, combined with other

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    Staphylococcus aureus is a cluster bacterium that can be found on the skin of around 25% of healthy adults. This bacterium is growing everyday all over the world and many people have no idea they are even carriers. “Staphylococcus aureus is present in the nose of adults (temporarily in 60% and permanently in 20 to 30%) and sometimes on the skin” (Levison). This bacterium has the ability to cause skin infection and sometimes may lead to severe life threatening diseases. There are several different

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    Staphylococcus aureus Life History and Characteristics: Staphylococcus aureus is a gram positive bacterium that is usually found in the nasal passages and on the skin of 15 to 40% of healthy humans, but can also survive in a wide variety of locations in the body. This bacterium is spread from person to person or to fomite by direct contact. Colonies of S. aureus appear in pairs, chains, or clusters. S. aureus is not an organism that is contained to one region of the world and is a universal health

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    Introduction Staphylococcus aureus is a Gram-positive coccal bacterium which is estimated to have colonised 20-30% of the human population.1,2,3 S. aureus is normally found in the anterior nares and mucous membranes of these individuals. For the majority, this is not a problem as these people are colonised, not infected.2,3 However S. aureus is an opportunistic pathogen and if it contaminates a breach in the skin or mucous membranes, it can go on to infect any tissue in the body.3 Infection may

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    Background Staphylococcus aureus is a gram-positive, cluster forming bacterium which shows positive results in catalase and nitrate reduction tests. It is considered as a harmful pathogen for human and animal beings and has resistance to many classes of antimicrobial agents. The most important example is methicillin-resistant Staphylococcus aureus (MRSA), the first clinical isolate, reported at the end of 1960, within a year after the introduction of methicillin (Jevons et al., 1963). Afterwards

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    Staphylococcus aureus is a significant bacterial pathogen, able of infecting most of the tissue in the human body (1). These diseases include deep abscesses, endocarditis, and necrotizing pneumonia (3). This pathogen often appears by autoinfection with populations carried on the skin and its ability to infect and constantly evolve makes it both a dangerous and formidable pathogen. The mechanisms whereby bacteria achieve persistence have been a constant field of study. In the case of S. aureus, there

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    Methicillin-resistant staphylococcus aureus, or MRSA is a possibly fatal strain of Staph aureus that is resistant to many antibiotics. MRSA is unable to be killed by all beta-lactam antibiotics. This includes all penicillin’s and cephalosporin’s. There are two known type of MRSA. The most common type is nosocomial MRSA or HA-MRSA. Which is a strain found in hospitals, nursing homes, ect. The second type is community acquired MRSA or CA-MRSA. This strain of MRSA infects individuals who have not been

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    staphylococcus aureus

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    motility test was performed. A gelatin hydrolysis test was performed. A liquid broth agar was cultured to determine if there was use of oxygen. Results After the multitude of tests performed, it was determined that the bacterial unknown was Staphylococcus aureus. The gram stain slide was positive. The morphology and arrangement was grape like cocci clusters. On the glucose fermentation test the bacterial unknown tested positive for acid and negative for gas. The oxidase test was negative. The

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    Staphylococcus aureus Toxic Shock Syndrome Microbiology 222-007 Lauren Schnotala Introduction Toxic Shock Syndrome, also known simply as TSS, is a life threatening illness caused by a bacterium called Staphylococcus aureus. TSS was first discovered in children in 1978 (Venkataraman, 2015). After the 1978 discovery, the disease itself was nationally recognized in 1980 when it was seen as a health threat amongst reproductive women. After this epidemic the number of reports of TSS

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