Microbiology JoVE (Open Access) Citable · DOI

High-throughput Identification of Bacteria Repellent Polymers for Medical Devices

Name: High-throughput Identification of Bacteria Repellent Polymers for Medical Devices
Uploaded: 2026-06-04
Duration: 10 min 43 s
Description: Medical devices are often associated with hospital-acquired infections, which place enormous strain on patients and the healthcare system as well as ...

DOI: 10.3791/54382-v

What you'll learn

✓ Design and print polymer microarrays using contact printing technology
✓ Screen bacterial binding on polymer surfaces using high-throughput imaging
✓ Validate hit polymers on medical device substrates via SEM and confocal microscopy
✓ Identify bacteria-repellent polymer candidates for medical device coatings

Protocol

A high-throughput microarray method for the identification of polymers which reduce bacterial surface binding on medical devices is described.

Difficulty

advanced

Total time

~5–7 days (including polymer synthesis, printing, bacterial culture, imaging, and validation)

Biosafety

BSL-1

Steps

Print polymer microarrays using contact printer

Load polymer solutions onto a contact printing device to create microarrays on substrate surfaces. The printer deposits discrete polymer spots in a high-density array format for parallel screening.

▶ 00:39

Inoculate microarrays and image bacterial binding

Expose polymer microarrays to bacterial culture and perform fluorescence imaging to quantify bacterial surface attachment across all polymer variants. Analyze signal intensity to identify low-binding candidates.

▶ 02:34

Coat cover slips with hit polymers

Apply selected bacteria-repellent polymers to glass cover slip substrates to validate screening results on flat surfaces compatible with downstream microscopy techniques.

▶ 03:58

Analyze coated surfaces via scanning electron microscopy

Prepare coated cover slips and examine bacterial attachment morphology and density using SEM to confirm polymer efficacy at high resolution.

▶ 04:37

Select solvent and coat catheter substrates

Optimize polymer solvent selection for coating catheter devices, then apply validated polymers to catheter surfaces and assess bacterial binding via confocal microscopy.

▶ 05:51

Evaluate bacterial attachment on coated catheters

Perform SEM analysis on polymer-coated catheters inoculated with bacteria to verify bacterial repellency on the target medical device geometry.

▶ 07:38

Interpret results and identify lead polymers

Synthesize high-throughput screening data, SEM imaging, and confocal microscopy findings to identify polymer candidates with reduced bacterial surface binding for medical device applications.

▶ 08:21

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