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Related Concept Videos

Biological Methods for Microbial Control01:28

Biological Methods for Microbial Control

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Biological agents offer an effective means of controlling microbial growth by leveraging natural processes like predation, competition, and the secretion of antimicrobial substances.Predatory bacteria such as Bdellovibrio species target and kill pathogens like Salmonella and E. coli. They are widely used in poultry farms to control infections. Myxococcus species help combat plant-pathogenic fungi. These naturally occurring predators serve as eco-friendly alternatives to chemical pesticides and...
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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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Methods for Controlling Microbial Growth01:29

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Microbial growth control refers to various methods employed to inhibit, reduce, or eliminate microorganisms to ensure safety and hygiene across different settings. These methods are categorized based on the target environment and the level of microbial control required.Biocides are versatile agents designed to control microorganisms by either inhibiting their growth or outright killing them. These agents work through various physical, chemical, mechanical, or biological mechanisms. The...
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Chemicals play important roles in controlling microbial growth by targeting microbial structures and functions as sanitizers, antiseptics, disinfectants, and sterilants.Alcohols are commonly used sanitizers, effectively disrupting lipid membranes, which compromises cell integrity. They are also used as antiseptics and disinfectants due to their rapid action and versatility.Phenols and their derivatives phenolics , known for denaturing proteins and disrupting cell membranes, are particularly...
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Physical Methods for Controlling Microbial Growth: Temperature01:23

Physical Methods for Controlling Microbial Growth: Temperature

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Heat is a widely used method to control microbial growth by targeting and denaturing cellular proteins, thereby killing or inactivating microbes. This method's effectiveness is quantified using parameters such as the thermal death point (TDP), thermal death time (TDT), and decimal reduction time (D value). TDP represents the lowest temperature at which all microorganisms in a liquid suspension are eliminated within 10 minutes, whereas TDT is the time necessary to achieve sterilization at a...
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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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Updated: Dec 15, 2025

High-throughput Identification of Bacteria Repellent Polymers for Medical Devices
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Physical methods for controlling bacterial colonization on polymer surfaces.

Coro Echeverria1, Marcelo Der Torossian Torres2, Marta Fernández-García1

  • 1Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain.

Biotechnology Advances
|July 15, 2020
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Summary

Surface topography can prevent microbial biofilm formation on medical devices. This research reviews how micro- and nano-scale structures on polymer surfaces reduce bacterial attachment, offering an alternative to antibiotics.

Keywords:
AntifoulingAntimicrobial surfacesBacteria-surface interactionsBacterial attachmentBiofilmHierarchicalMicrotopograpyNanotopography

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Area of Science:

  • Biomaterials Engineering
  • Infectious Diseases
  • Surface Science

Background:

  • Microbial biofilm formation on material surfaces causes persistent infections, particularly with biomedical devices.
  • Biofilms exhibit tolerance and resistance to antimicrobial treatments, complicating infection control.
  • Reducing initial bacterial attachment is key to preventing biofilm development and infection spread.

Purpose of the Study:

  • To review recent advances in surface topography-based antimicrobial approaches.
  • To explore the influence of micro- and nano-topography on bacterial surface attachment.
  • To provide insights into preparing antimicrobial polymeric materials.

Main Methods:

  • Review of literature on surface topography and bacterial adhesion.
  • Focus on structured polymeric surfaces and their fabrication methods (lithography, direct-write, instability-induced patterning).
  • Analysis of the impact of micro-, nano-, and hierarchical surface structures.

Main Results:

  • Surface topography, particularly at micro- and nano-scales, significantly influences bacterial attachment.
  • Structured polymer surfaces show promise for reducing microbial colonization.
  • Various patterning techniques enable the creation of diverse surface topographies.

Conclusions:

  • Surface topography is a viable strategy for developing antimicrobial materials without chemical agents.
  • Tailoring micro- and nano-scale surface features on polymers can inhibit biofilm formation.
  • Further research into hierarchical structuration can lead to advanced antimicrobial medical devices.