Phenotypic and molecular characterization of HA-MRSA in Taif hospitals, Saudi Arabia

  • Emad M Eed Faculty of Applied Medical Sciences, Taif University, Saudi Arabia
  • Mabrouk M Ghonaim Faculty of Applied Medical Sciences, Taif University, Saudi Arabia
  • Yousry M Hussein Faculty of Applied Medical Sciences, Taif University, Saudi Arabia
  • Taiser M Saber Faculty of Applied Medical Sciences, Taif University, Saudi Arabia
  • Amany S Khalifa Faculty of pharmacy, Taif University, Saudi Arabia
Keywords: HA-MRSA, CA-MRSA, SCCmec, mecA gene

Abstract

Introduction: Methicillin-resistant S. aureus (MRSA) is one of the most important organisms causing hospital-acquired infections worldwide. Molecular analysis of MRSA strains from Taif, Saudi Arabia, had not been previously done. Phenotypic and molecular characteristics of MRSA isolated from Taif hospitals were investigated.

Methodology: This study involved S. aureus strains isolated from different clinical samples from Taif hospitals. MRSA strains were identified and antimicrobial susceptibility profiles were determined. Multiplex polymerase chain reaction (PCR) was used to identify S. aureus-specific sequence, mecA genes, and type of staphylococcal cassette chromosome mec (SCCmec). MRSA strains were typed using coagulase gene polymorphism.

Results: In total, 390 strains of S. aureus were isolated, and 58 MRSA strains – 40 hospital-acquired  MRSA (HA-MRSA) and 18 community-acquired MRSA (CA-MRSA) – were detected. HA-MRSA strains included three SCCmec types, while CA-MRSA strains included two SCCmec types. PCR amplification and restriction of the coagulase gene of the 58 MRSA isolates showed nine different patterns, while three strains were non-typable. HA-MRSA strains showed seven distinct restriction fragment length polymorphism (RFLP) patterns; the most frequent was pattern 2 (15 isolates), followed by patterns 1 and 4 (5 isolates each). CA-MRSA showed five RFLP patterns; the most frequent was pattern 3 (7 isolates) followed by pattern 8 (6 isolates).

Conclusions: HA-MRSA strains were more common than CA-MRSA strains. SCCmec typing and coagulase gene polymorphism analysis may be useful methods for studying clonal relatedness of isolates and for discriminating between HA-MRSA and CA-MRSA.

Author Biographies

Emad M Eed, Faculty of Applied Medical Sciences, Taif University, Saudi Arabia
Assistant professor at Medical Microbiology & Immunology Department
Mabrouk M Ghonaim, Faculty of Applied Medical Sciences, Taif University, Saudi Arabia
professor at Medical Microbiology & Immunology Department
Yousry M Hussein, Faculty of Applied Medical Sciences, Taif University, Saudi Arabia
professor at Medical Biochemistry Department, Faculty of Medicine,
Taiser M Saber, Faculty of Applied Medical Sciences, Taif University, Saudi Arabia
assistant professor at medical Microbiology & Immunology Department, Faculty of Medicine,
Amany S Khalifa, Faculty of pharmacy, Taif University, Saudi Arabia
Assitant professor at Clinical pathology  Department, Faculty of Medicine,
Published
2015-03-15
How to Cite
1.
Eed E, Ghonaim M, Hussein Y, Saber T, Khalifa A (2015) Phenotypic and molecular characterization of HA-MRSA in Taif hospitals, Saudi Arabia. J Infect Dev Ctries 9:298-303. doi: https://doi.org/10.3855/jidc.5954
Section
Brief Original Articles