Resistance profiles in surgical-site infection

Area of Science:

• Infectious Diseases
• Microbiology
• Surgical Infections

Background:

• Surgical-site infections (SSIs) affect approximately 5% of surgical patients, posing risks of severe complications and septic illness.
• The emergence of antibiotic-resistant bacteria, particularly Staphylococcus aureus, is a major challenge in managing SSIs.
• Despite stringent sterile protocols, wound contamination during surgery is common, contributing to SSI development.

Purpose of the Study:

• To review the characteristics of frequently isolated bacterial strains from SSIs.
• To focus on Gram-positive organisms due to their rising prevalence in SSIs.
• To discuss the increasing potential for antibiotic resistance in these pathogens, including vancomycin resistance.

Main Methods:

• Literature review of studies reporting bacterial isolates from SSIs.
• Analysis of prevalence data for Gram-positive bacteria in surgical wound infections.
• Examination of antibiotic resistance patterns, with emphasis on Staphylococcus aureus and MRSA.

Main Results:

• Staphylococcus aureus is the most common pathogen isolated from SSIs, often originating from the patient's own skin.
• Community-acquired Methicillin-resistant Staphylococcus aureus (MRSA) strains exhibit enhanced virulence due to specific genetic factors.
• Gram-positive bacteria are increasingly implicated in SSIs and demonstrate a high propensity for developing resistance to multiple antibiotics.

Conclusions:

• Gram-positive bacteria, especially Staphylococcus aureus, are key pathogens in SSIs.
• The rise of antibiotic-resistant strains like MRSA necessitates ongoing surveillance and novel treatment strategies.
• Understanding the characteristics and resistance mechanisms of these bacteria is crucial for effective SSI prevention and management.