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Related Concept Videos

Surface Membrane Barriers01:18

Surface Membrane Barriers

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The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
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Physical Methods for Controlling Microbial Growth: Radiation and Filtration01:26

Physical Methods for Controlling Microbial Growth: Radiation and Filtration

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Radiation and filtration are essential tools for microbial control, targeting microorganisms through distinct mechanisms. Radiation eliminates microbes by damaging their DNA, either killing them or inhibiting their growth. Based on wavelength, radiation is classified into two types: nonionizing and ionizing radiation.Non-ionizing radiation, such as UV radiation (200–400 nm), is absorbed by DNA, causing defects that effectively disinfect surfaces, air, and water, including safety cabinets.
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Biofilms01:29

Biofilms

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Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
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Related Experiment Video

Updated: Sep 21, 2025

High-throughput Identification of Bacteria Repellent Polymers for Medical Devices
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Shielding Surfaces from Viruses and Bacteria with a Multiscale Coating.

Deepu Ashok1,2, Mahdiar Taheri3, Puneet Garg1,2

  • 1Laboratory of Advanced Biomaterials, Research School of Chemistry and the John Curtin School of Medical Research, The Australian National University, Canberra, 2601, Australia.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|June 3, 2022
PubMed
Summary

A novel sprayable coating offers dual protection against viruses and bacteria by resisting pathogen uptake and actively killing microbes. This durable antimicrobial surface significantly reduces viral contamination, addressing critical public health needs.

Keywords:
ZIF-8 metal-organic frameworks (MOFs)antibacterialantiviralinfectionsmultiscale coatings

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Area of Science:

  • Materials Science
  • Microbiology
  • Infectious Disease Prevention

Background:

  • Surface-mediated transmission of viral and bacterial pathogens is a major global health concern.
  • The rise of antibiotic-resistant bacteria and pandemics like COVID-19 underscore the urgent need for effective surface disinfection and prevention strategies.
  • Current methods often lack durability or broad-spectrum efficacy against diverse pathogens.

Purpose of the Study:

  • To develop and characterize a sprayable coating with intrinsic resistance to pathogen uptake.
  • To evaluate the microbicidal efficacy and durability of the coating against bacteria and viruses.
  • To assess the coating's performance under conditions simulating real-world surface contamination and damage.

Main Methods:

  • Development of a sprayable coating formulation designed for surface application.
  • In vitro testing of bacterial and viral uptake resistance using contaminated surfaces and droplets.
  • Assessment of antimicrobial activity through bacterial viability assays.
  • Durability testing including scratching, surface damage induction, and prolonged submersion in bacterial suspensions.
  • Quantitative analysis of viral reduction on coated versus uncoated surfaces.

Main Results:

  • The coating demonstrated intrinsic resistance to the uptake of both bacteria and viruses from surfaces and droplets.
  • A dual barrier effect was observed, combining pathogen uptake resistance with potent microbicidal activity against bacteria.
  • Antimicrobial functionality remained effective even after induced surface damage (scratching) and extended exposure (9 days) to high bacterial concentrations.
  • Coated surfaces showed an 11-fold reduction in viral contamination compared to uncoated controls.

Conclusions:

  • The developed sprayable coating provides a robust, dual-action defense against surface-mediated pathogen transmission.
  • Its preserved antimicrobial efficacy after damage and prolonged use suggests significant potential for long-term infection control applications.
  • This technology offers a promising strategy to mitigate the spread of infectious diseases in various environments.