Bacterial adherence to different meshes used in abdominal surgery

Area of Science:

• Biomaterials Science
• Infectious Diseases
• Surgical Innovation

Background:

• Abdominal wall prostheses are prone to bacterial adhesion, leading to acute and chronic infections.
• Understanding the influence of prosthesis material and morphology is key to preventing mesh-related complications.

Purpose of the Study:

• To evaluate the bacterial adhesion properties of different abdominal wall prostheses.
• To determine how material type and mesh structure affect bacterial colonization.

Main Methods:

• Three polypropylene monofilament mesh (PMM) types were tested: high-density, low-density, and composite (low-density PMM with a hydrophilic film).
• Microbial adhesion assays were conducted using reference strains of Staphylococcus aureus, Staphylococcus epidermidis, Mycobacterium abscessus, and Mycobacterium fortuitum.

Main Results:

• Polypropylene monofilament mesh (PMM) demonstrated lower adherence for Staphylococcus spp. and Mycobacterium fortuitum.
• Mycobacterium abscessus showed reduced adherence to composite prostheses.
• Mycobacterium spp. generally had lower adherence than Staphylococcus spp. on most materials, with exceptions noted for low-density PMM.

Conclusions:

• Bacterial adherence varies significantly based on prosthesis material, morphology, and the specific bacterial species.
• The choice of mesh graft is critical for minimizing infection risk in abdominal wall reconstruction, with specific materials showing differential efficacy against common pathogens.