Detection of the tst gene and determining the relationship between the presence of the mecA gene and antibiotic resistance of Staphylococcus aureus Isolated from some Hospital in Dhi Qar province

Main Article Content

Mushtaq Talib Al-Safi

Keywords

Staphylococcus aureus , , virulence gene , antibiotic-resistance property

Abstract

Methicillin, a β-lactam antibiotic, acts by inhibiting penicillin-binding proteins (PBPs) that are involved in the synthesis of peptidoglycan, an essential mesh-like polymer that surrounds the cell. S. aureus can become resistant to methicillin and other β-lactam antibiotics through the expression of a foreign PBP, PBP2a, that is resistant to the action of methicillin but which can perform the functions of the host PBPs. Methicillin-resistant S. aureus isolates are often resistant to other. Out of 163 samples, 44 (26.99%) isolates of staphylococcus bacteria were diagnosed. Ten antibiotics were tested, where the bacteria showed the highest resistance of 100% to cefalexin and cefuroxime, and it was sensitive to Erythromycin with a percentage of (52.27%). It was also noted that the
percentage of the mecA gene was (41)93.18% in the study samples and the percentage of the tst gene (14) was 31.81%.

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