Slime production by Staphylococci isolated from prosthesis-associated infections

Area of Science:

• Microbiology
• Infectious Diseases
• Clinical Science

Background:

• Biofilm formation, known as slime, is a common characteristic of clinical isolates of Staphylococcus epidermidis, aiding in medical device adherence and immune evasion.
• High-frequency slime production in Staphylococcus aureus clinical isolates, particularly from human infections, has not been widely reported.

Purpose of the Study:

• To investigate and compare the slime-producing capabilities of clinical isolates of Staphylococcus aureus (S. aureus) and Staphylococcus epidermidis (S. epidermidis).
• To assess the prevalence of slime production in S. aureus and S. epidermidis from catheter-associated and post-surgical infections.

Main Methods:

• Clinical isolates of S. aureus and S. epidermidis were obtained from patients with catheter-associated and post-surgical infections.
• Slime production was assessed using a sensitive Congo red agar culture method.

Main Results:

• The study identified a markedly high proportion of slime-producing strains among Staphylococcus aureus isolates.
• In nosocomial surgical infections, excluding catheter-associated infections, Staphylococcus aureus was found to be a more prevalent etiological agent than Staphylococcus epidermidis.
• A significant prevalence of slime production was observed in Staphylococcus aureus from these surgical infections.

Conclusions:

• Staphylococcus aureus demonstrates a higher prevalence of slime production than previously recognized, especially in clinical settings.
• The findings suggest Staphylococcus aureus is a significant pathogen in nosocomial surgical infections, often associated with slime production.
• Further research into the role of slime in Staphylococcus aureus pathogenesis and treatment strategies is warranted.