bio lab final

bio lab final - Abstract: Methicillin-resistant S. aureus...

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Abstract: Methicillin-resistant S. aureus (MRSA) is largely a hospital-acquired strain of the bacterium Staphylococcus aureus . MRSA infections that are not acquired due to hospitalization are referred to as community-acquired MRSA (CA-MRSA). The purpose of this experiment was to determine the prevalence of MRSA among the Intro Bio 20082 class. The test population used for the study was composed purely of college students who live in close proximity to one another. Bacteria samples from 94 students were cultured in lab and tested for antibiotic resistance. It was found that 57.4% of students had S. aureus and 14.5% of the 62 usable results had MRSA. These results were used to determine whether activities related to several potential risk factors affect an individual’s chance of acquiring MRSA. It was found that these risk factors do have an impact of the prevalence of MRSA in the RIT community. Introduction: The scientific community acknowledges that microbes are becoming more and more antibiotic resistant. Once considered miracle drugs, antibiotics have switched from solutions to problems because of the misuse and abuse of antibiotics. One of the strains of resistant bacteria of concern is Methicillin-resistant Staphylococcus aureus, which is particularly problematic in hospitals and nursing homes where it has been more prevalent historically. However, people with MRSA can be completely unaware that they are harboring this strain of the bacteria and spread it to others as a result of daily activities. It is not until an individual has an infection that they may realize they carry these resistant bacteria, at which point they may have passed it on to any number of people. This poses a serious public health risk that could lead to an epidemic that scientists are trying to prevent. In Europe, a program called the European Antimicrobial Resistance Surveillance System tests hospital patients for MRSA. It found that MRSA was much more prevalent in Southern European countries compared to Northern European countries. In the Netherlands, for example, only 0.6% of the 5,359 people tested had MRSA compared to 40.9% of 1,470 people in Italy (Tiemersma et al. 2004). However, the Netherlands have taken several more steps in the fight against MRSA than most. They have a national search and destroy policy and place strict policies on antibiotic use (Wertheim et al. 2004). In countries with no such policies, incidences of MRSA are higher. Recently, in areas where people live in close contact with one another, CA-MRSA has surfaced as a major problem. Skin-to-skin contact is a direct route, but the bacteria can also be transmitted by sharing communal spaces, like locker rooms. In general, the risk factors include contact, crowding, contaminated surfaces, and lack of cleanliness (Weiner, 2008). One such place where these factors are common is on military bases. At one base, as many as 11 cases were reported per thousand recruits when an outbreak occurred (Zinderman et al. 2004).
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bio lab final - Abstract: Methicillin-resistant S. aureus...

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