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Distribution of methicillin resistance gene, mecA, in Staphylococcus aureus genomes

  1. Open Access Kent State
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  4. 2016 - Kent State University Undergraduate Symposium on Research, Scholarship and Creative Activity
  5. Kent State University Undergraduate Symposium on Research, Scholarship and Creative Activity
  6. Distribution of methicillin resistance gene, mecA, in Staphylococcus aureus genomes
Author(s)
  • Gino Cioffi
  • Reid Mascolo
Abstract

Methicillin-resistant Staphylococcus aureus (MRSA), a gram-positive bacteria, is an important pathogen, posing a global health threat. Resistance to the antibiotic methicillin develops when a susceptible bacterial strain of S. aureus (MSSA) acquires a resistance gene, mecA, which is carried on a mobile genetic element, referred to as Staphylococcal Cassette Chromosome mec (SCCmec). It has been hypothesized that MRSA originated through the horizontal gene transfer of SCCmec from another species, S. epidermidis O7.1, to MSSA. However, it remains unclear whether it was a single transfer event, or whether such transfer can occur repeatedly. Understanding this would be important for MRSA control. In this project we examine publicly available genomes of S. aureus and related species to determine presence of mecA genes and to visualize the distribution of this gene among strains using the phylogenetic tree approach.

Format
Conference Proceeding
Publication Date
2016-03-15
Contributor(s)
Faculty Mentor
Dr. Helen Piontkivska
Dr. Tara Smith
Subject
  • Bioinformatics
  • Biotechnology
  • Epidemiology
  • Genetics and Genomics
Modified Abstract

Methicillin-resistant Staphylococcus aureus (MRSA) is an important pathogen, posing a global health threat. Resistance to the antibiotic methicillin develops when a susceptible bacterial strain of S. aureus (MSSA) acquires a resistance gene, mecA, which is carried on a mobile genetic element, referred to as Staphylococcal Cassette Chromosome mec (SCCmec). It has been hypothesized that MRSA originated through the horizontal gene transfer of SCCmec from another species, S. epidermidis O7.1, to MSSA. However, it remains unclear whether it was a single transfer event, or whether such transfer can occur repeatedly. In this project we examine publicly available genomes of S. aureus and related species to determine presence of mecA genes and to visualize the distribution of this gene among strains using the phylogenetic tree approach.

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