Slime Production in Staphylococcus epidermidis Infections

Microbiological Characteristics

S. epidermidis produces an extracellular slime that forms a biofilm, allowing it to adhere to and colonize implanted medical devices such as catheters and cardiovascular implantable electronic devices (CIEDs) 1
The slime consists of polysaccharide intercellular adhesin that mediates cell-to-cell adhesion and forms the extracellular polymeric matrix of the biofilm 2
While S. aureus can form biofilms, it relies more on other virulence factors and adhesins rather than the extensive slime production characteristic of S. epidermidis 2
S. aureus possesses surface adhesins known as MSCRAMMs (microbial surface components reacting with adherence matrix molecules) that allow it to establish infections 1
Candida species can form biofilms, but these differ structurally from the slime-producing biofilms of S. epidermidis 3, 4
Candida biofilms are more difficult to diagnose using traditional microbiological techniques and require specialized methods for detection 4
K. pneumoniae is recognized as a common pathogen in complicated skin and soft tissue infections but is not primarily characterized as a slime producer 5

The biofilm formed by slime-producing S. epidermidis protects bacteria from host defenses and antibiotics, making these infections particularly difficult to treat 1, 6
When managing device-related infections, particularly those involving intravascular catheters or implantable devices, clinicians should consider the high likelihood of S. epidermidis involvement and its slime-producing capabilities 1, 6
Treatment of slime-producing S. epidermidis infections often requires device removal, as antibiotics alone may be ineffective against bacteria protected within the biofilm 6
For infections where device removal is not possible, higher antibiotic concentrations (100-1000 times greater) may be needed to kill biofilm bacteria compared to planktonic bacteria 6