Epidemiology and molecular characteristics of methicillin-resistantStaphylococcus aureus from skin and soft tissue infections in Shiraz, Iran
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Updated: Aug 11, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus MRSA
Published on: February 9, 2011
Samira Mehrshad1, Masoud Haghkhah1, Shahin Aghaei2
1Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran.
Background/Aim:
Panton-Valentine leukocidin (PVL)-positive methicillin-resistant Staphylococcus aureus (MRSA) infections are increasing in some regions of Iran. The aim of the current study was to assess the epidemiology and molecular characteristics of S. aureus isolated from patients with skin infections in Shiraz, Iran.
Materials And Methods:
Swab samples were obtained from patients admitted to the skin and burn units of hospitals. The medical records of each patient were collected via questionnaire. All staphylococcal isolates were collected and examined by conventional methods for detecting S. aureus strains. PCR was used to detect S. aureus harboring the mecA and pvl genes.
Results:
Out of 243 staphylococcal isolates, 55 (22.6%) S. aureus and 91 (37.4%) S. epidermidis were detected. Of the 45 patients, 21 (46.7%) were S. aureus carriers. The mecA gene was identified in 60% of S. aureus isolates, and the rest were sensitive to methicillin. Of the S. aureus isolates, 54.5% were positive for the pvl gene.
Conclusion:
This study revealed a high prevalence of PVL-positive MRSA strains in the evaluated hospitals. Thus, early diagnosis of infections caused by this pathogen seems to be necessary by intake screening allowing for proper treatment, especially in high-risk patients and in order to prevent the spread of infection.
Insights
Panton-Valentine leukocidin (PVL)-positive methicillin-resistant Staphylococcus aureus (MRSA) is increasingly prevalent in Iranian hospitals. Early screening and diagnosis are crucial for treating these skin infections and preventing further spread.
Area of Science:
- Medical Microbiology
- Infectious Diseases
- Epidemiology
Background:
- Panton-Valentine leukocidin (PVL)-positive methicillin-resistant Staphylococcus aureus (MRSA) infections are a growing concern in Iran.
- Staphylococcus aureus skin infections pose a significant public health challenge.
Purpose of the Study:
- To investigate the epidemiology and molecular features of S. aureus from skin infection patients in Shiraz, Iran.
- To determine the prevalence of mecA and pvl genes in isolated S. aureus strains.
Main Methods:
- Conventional microbiological methods were used to identify S. aureus from patient samples.
- Polymerase Chain Reaction (PCR) was employed to detect the presence of mecA and pvl genes.
Main Results:
- Out of 243 staphylococcal isolates, 55 (22.6%) were S. aureus. Of these, 60% carried the mecA gene (MRSA), and 54.5% were positive for the pvl gene.
- A high proportion of S. aureus isolates were PVL-positive MRSA.
Conclusions:
- The study highlights a significant prevalence of PVL-positive MRSA strains in the studied hospitals.
- Prompt diagnosis and targeted treatment are essential for managing these infections and curbing transmission, particularly in high-risk individuals.
Related Concept Videos
The Skin Microbiota
Staphylococcal Skin Infections
Mechanism of Antibiotic Resistance in MRSA
Clinical Significance of Antibiotic Resistance

