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Related Concept Videos

MALDI-TOF Mass Spectrometry01:19

MALDI-TOF Mass Spectrometry

Mass spectrometry is a powerful characterization technique that can identify and separate a wide variety of compounds ranging from chemical to biological entities, based on their mass-to-charge ratio (m/z). The instruments that allow this detection, known as mass spectrometers, have three components: an ion source, a mass analyzer, and a detector. These spectrometers differ based on the nature of their ion source and analyzers.Matrix-assisted laser desorption ionization (MALDI) is a commonly...
Automated Microbial Diagnostics01:24

Automated Microbial Diagnostics

Automated diagnostic analyzers have transformed clinical microbiology by providing rapid and reliable methods for pathogen identification and antibiotic susceptibility testing. Among these systems, the Vitek 2 is widely used because it automates the traditionally labor-intensive processes of microbial identification (ID) and antibiotic susceptibility testing (AST), delivering standardized and timely results that are essential for effective patient care.Microbial Identification with ID CardsThe...

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Related Experiment Video

Updated: May 20, 2026

Investigation of Microbial Cooperation via Imaging Mass Spectrometry Analysis of Bacterial Colonies Grown on Agar and in Tissue During Infection
09:49

Investigation of Microbial Cooperation via Imaging Mass Spectrometry Analysis of Bacterial Colonies Grown on Agar and in Tissue During Infection

Published on: November 18, 2022

Primer on agar-based microbial imaging mass spectrometry.

Jane Y Yang1, Vanessa V Phelan, Ryan Simkovsky

  • 1Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla, California, USA.

Journal of Bacteriology
|July 24, 2012
PubMed
Summary

Matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) imaging mass spectrometry (IMS) provides a direct view of microbial molecules. This method aids in understanding microbial interactions and has broad applications in various scientific fields.

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Last Updated: May 20, 2026

Investigation of Microbial Cooperation via Imaging Mass Spectrometry Analysis of Bacterial Colonies Grown on Agar and in Tissue During Infection
09:49

Investigation of Microbial Cooperation via Imaging Mass Spectrometry Analysis of Bacterial Colonies Grown on Agar and in Tissue During Infection

Published on: November 18, 2022

Evaluation of Microbial Safety of Dairies using Bacterial Proteomic Profiling via MALDI Approach
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Sample Preparation for Metabolic Profiling using MALDI Mass Spectrometry Imaging
09:08

Sample Preparation for Metabolic Profiling using MALDI Mass Spectrometry Imaging

Published on: December 22, 2020

Area of Science:

  • Microbiology
  • Analytical Chemistry
  • Biotechnology

Background:

  • Microbial interactions are complex and crucial for various biological processes.
  • Understanding the molecular basis of these interactions is essential for advancements in medicine, agriculture, and industry.
  • Current methods for analyzing microbial communities can be limited in their ability to capture spatial and molecular information simultaneously.

Purpose of the Study:

  • To present a standardized protocol for microbial imaging mass spectrometry (IMS) using MALDI-TOF.
  • To demonstrate the utility of MALDI-TOF IMS for investigating microbial metabolic exchange and interactions.
  • To provide practical guidelines for overcoming common challenges in microbial IMS.

Main Methods:

  • Culturing of microbes on agar-based medium.
  • Application of matrix for MALDI-TOF analysis.
  • Dehydration of the sample.
  • Data acquisition using MALDI-TOF IMS.
  • Data analysis and interpretation of molecular profiles.

Main Results:

  • MALDI-TOF IMS successfully captures global molecular information directly from microbes on agar.
  • The technique allows for direct correlation between microbial chemotypes and phenotypes.
  • The study outlines a five-step protocol for microbial IMS, including culturing, matrix application, dehydration, data acquisition, and analysis.

Conclusions:

  • Microbial MALDI-TOF IMS is a powerful tool for studying microbial communities and their interactions.
  • The presented guidelines facilitate the application of microbial IMS in diverse fields.
  • This technique has significant potential for bio-based agricultural, biofuel, diagnostic, and therapeutic discovery.