Innovative Elastomers with Antimicrobial Activity May Decrease Infection Risks during Milking.

Area of Science:

• Veterinary Medicine
• Materials Science
• Microbiology

Background:

• Contagious pathogens in dairy herds pose significant economic and zoonotic risks, exacerbated by antimicrobial resistance.
• Milking processes, specifically liner contamination, are a primary vector for pathogen transmission between cows.
• Current infection control protocols often require segregation, lacking effective non-isolation methods.

Purpose of the Study:

• To evaluate the antimicrobial efficacy of novel elastomer formulations for dairy liners.
• To investigate the intrinsic antimicrobial properties of rubber and silicone elastomers.
• To assess the impact of antimicrobial additives on pathogen reduction during milking.

Main Methods:

• Testing two elastomer types (rubber, silicone) and nine formulations against major mastitis pathogens (Staphylococcus aureus, Streptococcus agalactiae, Escherichia coli).
• Challenging elastomer samples with bacterial cultures to quantify pathogen survival.
• Analyzing bacterial survival curves to determine antimicrobial activity.

Main Results:

• Basic rubber elastomers demonstrated inherent antimicrobial activity against tested pathogens.
• Silicone elastomers showed some antibacterial capacity, but less than rubber.
• All tested formulations with antimicrobial components significantly reduced bacterial survival rates.
• Variations in efficacy were attributed to formulation differences and manufacturing processes.

Conclusions:

• Novel antimicrobial elastomers offer a promising solution to reduce pathogen transmission via milking liners.
• The intrinsic antimicrobial properties of rubber present a new avenue for material development in animal health.
• These advancements support dairy herd sustainability and align with One Health principles by mitigating zoonotic disease and antimicrobial use.