An efficient isolation of foodborne pathogen using surface-modified porous sponge

Area of Science:

• Materials Science
• Biotechnology
• Food Safety

Background:

• Pathogenic bacteria in food pose significant public health risks, necessitating rapid detection methods.
• Current bacterial isolation techniques are often hindered by complex culturing, time constraints, and high costs.
• There is a need for innovative approaches to isolate bacteria directly from complex food matrices.

Purpose of the Study:

• To develop an efficient and cost-effective method for isolating pathogenic bacteria directly from food.
• To create a surface-modified sponge capable of selective absorption of oil components from food extracts.
• To demonstrate the efficacy of the developed sponge in isolating specific foodborne pathogens.

Main Methods:

• Utilized initiated chemical vapor deposition (iCVD) to coat a 3D melamine sponge with poly(2,4,6,8-tetravinyl-2,4,6,8-tetramethyl cyclotetra-siloxane) (pV4D4).
• The surface modification imparted hydrophobicity and oleophilicity for selective oil absorption.
• Tested the sponge's ability to isolate Escherichia coli O157:H7 from a heterogeneous mixture of oil, water, and food particles.

Main Results:

• The surface-modified sponge selectively absorbed oil components from food extracts.
• Achieved efficient isolation of Escherichia coli O157:H7 from complex food mixtures.
• Demonstrated comparable isolation efficiency to artificial model systems.

Conclusions:

• The developed surface-modified sponge offers a novel platform for oil/water separation in food analysis.
• This method provides a direct and efficient approach for isolating foodborne pathogens, bypassing traditional cultivation steps.
• The technology has the potential to enhance the efficiency of molecular diagnostics for food safety applications.