Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Exploration of viral diversity in Aedes mosquitoes employing different shotgun metagenomic data analysis pipelines.

Virology journal·2026

Same author

Editorial: Insights in biosafety and biosecurity 2024/2025: novel developments, current challenges, and future perspectives.

Frontiers in bioengineering and biotechnology·2026

Same author

Metagenomic profiling unveils the viral diversity in field-collected Aedes larvae from Central India employing nanopore sequencing.

Scientific reports·2026

Same author

Application of multi-criteria decision analysis techniques and decision support framework for informing arbovirus risk assessments for planning, preparedness and response.

Frontiers in bioengineering and biotechnology·2025

Same author

Identification and characterization of botulinum neurotoxin-like two-component toxins in <i>Paeniclostridium ghonii</i>.

Science advances·2025

Same author

Botulinum neurotoxin Light Chain/A1 uses fast synaptic vesicle cycling to cleave plasma membrane bound SNAP-25.

Communications biology·2025

Search research articles

Related Experiment Video

Updated: Jul 18, 2025

Implementation of a Permeable Membrane Insert-based Infection System to Study the Effects of Secreted Bacterial Toxins on Mammalian Host Cells

Implementation of a Permeable Membrane Insert-based Infection System to Study the Effects of Secreted Bacterial Toxins on Mammalian Host Cells

Published on: August 19, 2016

Special Issue: Gram-Positive Bacterial Toxins.

Shashi Sharma¹, Sabine Pellett², Stephen A Morse³

¹Division of Microbiology, Office of Regulatory Science, CFSAN/US Food and Drug Administration, College Park, MD 20740, USA.

|August 26, 2023

Summary

The Gram stain differentiates bacteria by their cell wall composition, categorizing them as Gram-negative or Gram-positive. This fundamental microbiological technique aids in bacterial identification and treatment selection.

More Related Videos

Isolation and Quantification of Botulinum Neurotoxin From Complex Matrices Using the BoTest Matrix Assays

Isolation and Quantification of Botulinum Neurotoxin From Complex Matrices Using the BoTest Matrix Assays

Published on: March 3, 2014

Visualization of Bacterial Toxin Induced Responses Using Live Cell Fluorescence Microscopy

Visualization of Bacterial Toxin Induced Responses Using Live Cell Fluorescence Microscopy

Published on: October 1, 2012

Related Experiment Videos

Last Updated: Jul 18, 2025

Implementation of a Permeable Membrane Insert-based Infection System to Study the Effects of Secreted Bacterial Toxins on Mammalian Host Cells

Implementation of a Permeable Membrane Insert-based Infection System to Study the Effects of Secreted Bacterial Toxins on Mammalian Host Cells

Published on: August 19, 2016

Isolation and Quantification of Botulinum Neurotoxin From Complex Matrices Using the BoTest Matrix Assays

Isolation and Quantification of Botulinum Neurotoxin From Complex Matrices Using the BoTest Matrix Assays

Published on: March 3, 2014

Visualization of Bacterial Toxin Induced Responses Using Live Cell Fluorescence Microscopy

Visualization of Bacterial Toxin Induced Responses Using Live Cell Fluorescence Microscopy

Published on: October 1, 2012

Area of Science:

Microbiology
Bacteriology
Cell Biology

Background:

The Gram stain is a cornerstone differential staining technique in microbiology.
It differentiates bacteria based on cell wall properties, primarily peptidoglycan content and outer membrane presence.
This classification into Gram-negative and Gram-positive bacteria is crucial for initial identification.

Discussion:

The differential staining relies on the ability of crystal violet-iodine complex to be retained or decolorized.
Gram-positive bacteria have a thick peptidoglycan layer that retains the primary stain.
Gram-negative bacteria possess a thinner peptidoglycan layer and an outer membrane, leading to decolorization and counterstaining.

Key Insights:

Cell wall composition dictates Gram stain response.
Gram stain provides rapid, preliminary bacterial classification.
Understanding Gram stain mechanisms is vital for accurate interpretation.

Outlook:

Continued relevance in clinical diagnostics and research.
Foundation for further bacterial characterization.
Essential for guiding antibiotic therapy selection.