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SCCmec, or staphylococcal cassette chromosome mec, is a mobile genetic element of Staphylococcus bacterial species. This genetic sequence includes the mecA gene coding for resistance to the antibiotic methicillin and is the only known way for Staphylococcus strains to spread the gene in the wild by horizontal gene transfer. [1]
The mecA gene, which confers resistance to a number of antibiotics, is always present in MRSA and usually absent in MSSA; however, in some instances, the mecA gene is present in MSSA but is not expressed. Polymerase chain reaction (PCR) testing is the most precise method for identifying MRSA strains. Specialized culture media have been ...
Meca or MECA may refer to: Biology. mecA, responsible for methicillin resistance in MRSA; Meca, a snout moth genus in the subfamily Pyralinae; Places Meca ...
SCCmec is a family of mobile genetic elements, which is a major driving force of S. aureus evolution. [99] Resistance is conferred by the mecA gene, which codes for an altered penicillin-binding protein (PBP2a or PBP2') that has a lower affinity for binding β-lactams (penicillins, cephalosporins, and carbapenems). This allows for resistance to ...
The mecA gene is carried by a mobile genetic element called the staphylococcal cassette chromosome mec (SCCmec) which is thought to promote spread between different species. [58] The presence of the mecA gene, expression of PBP2a, and methicillin resistance has been reported in S. schleiferi isolates. [13]
Rocket Pharmaceuticals Inc (NASDAQ: RCKT) has announced positive data from its Fanconi Anemia (FA), Leukocyte Adhesion Deficiency-I (LAD-I), and Pyruvate Kinase Deficiency (PKD) gene therapy programs.
It also served a purpose in the laboratory to determine the antibiotic sensitivity of Staphylococcus aureus to other penicillins facing β-lactam resistance; this role has now been passed on to other penicillins, namely cloxacillin, as well as genetic testing for the presence of mecA gene by PCR. [citation needed]
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