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Related Concept Videos

Differential Staining Technique01:26

Differential Staining Technique

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Differential staining is an essential microbiological technique that exploits variations in cell wall structures to classify and identify microorganisms. It facilitates the distinction of bacteria, aiding in diagnostic and research applications. Two of the most widely used differential staining methods are Gram staining and acid-fast staining, both of which rely on the chemical and structural differences in bacterial cell walls.Gram Staining TechniqueGram staining differentiates bacteria by...
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Simple Staining Technique01:24

Simple Staining Technique

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OverviewStaining techniques in microscopy enhance the visualization of microorganisms by increasing contrast and allowing the differentiation of cellular structures. Simple staining is one of the fundamental methods used to observe the basic morphological characteristics of microorganisms, including their size, shape, and arrangement. This method relies on the application of a single dye to stain the entire cell, producing a clear contrast between the cell and the background.FixationFixation is...
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Fixation and Sectioning01:03

Fixation and Sectioning

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Two basic types of preparation are used to visualize specimens with a light microscope: wet mounts and fixed specimens.
The simplest type of preparation is the wet mount, in which the specimen is placed in a drop of liquid on the slide. A liquid specimen can be directly deposited on the slide using a dropper. Solid specimens, such as skin scraping, can be placed on the slide before adding a drop of liquid to prepare the wet mount. Sometimes the liquid is simply water, but stains are often added...
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Special Staining Techniques01:13

Special Staining Techniques

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Specialized staining techniques play a vital role in microbiology by enabling the visualization of specific bacterial structures that remain undetectable with standard microscopy methods. These techniques not only enhance the structural visualization of bacterial cells but also provide critical insights into their pathogenicity and classification. Additionally, they support diagnostic and research endeavors in microbiology by identifying key bacterial features.Capsule Staining for Virulence...
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Sputum Studies I: Gram Stain, cytology, and Acid-fast smear and culture01:26

Sputum Studies I: Gram Stain, cytology, and Acid-fast smear and culture

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Sputum studies are a critical part of diagnosing and treating numerous respiratory conditions. These studies involve obtaining sputum samples for analysis to identify pathogenic organisms and assess the presence of abnormal cells indicative of malignant conditions. This lesson will delve into three fundamental sputum studies: Gram Stain, Cytology, and Acid-fast Smear and Culture.
Gram Stain
The Gram Stain is an integral part of sputum studies. It involves the staining of sputum, which permits...
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Karyotyping

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Techniques for Processing Eyes Implanted With a Retinal Prosthesis for Localized Histopathological Analysis
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New Grocott Stain without Using Chromic Acid.

Kazuya Shiogama1, Kayo Kitazawa2, Yasuyoshi Mizutani1

  • 1Department of Pathology, Fujita Health University School of Medicine , Toyoake, Japan.

Acta Histochemica Et Cytochemica
|April 11, 2015
PubMed
Summary
This summary is machine-generated.

A new eco-friendly Grocott stain uses periodic acid and heat, avoiding harsh chromic acid for fungal detection. This method is effective and safer for histopathology labs.

Keywords:
chromic acidnew Grocott stainperiodic acidrefusalwaste management

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Area of Science:

  • Histopathology
  • Mycology
  • Environmental Science

Background:

  • Conventional Grocott stain utilizes hazardous 5% chromic acid for fungal oxidation.
  • This poses risks of human exposure to hexavalent chromium in laboratories.

Purpose of the Study:

  • To develop an environmentally friendly Grocott stain.
  • To reduce hazardous waste and improve laboratory safety.

Main Methods:

  • Modified the Grocott stain based on the 4R principle (refuse, reduce, reuse, recycle).
  • Replaced 5% chromic acid with 1% periodic acid combined with preheating methods (electric jar, microwave, pressure pan).
  • Recommended pressure pan heating in tap water for 10 minutes.

Main Results:

  • Achieved comparable fungal stainability to the conventional method for candidiasis and aspergillosis.
  • Observed enhanced staining of Mucor hyphae.
  • Demonstrated applicability to various mycotic pathogens in paraffin sections.

Conclusions:

  • The developed eco-friendly Grocott stain is an effective and safer alternative.
  • It minimizes environmental impact and occupational hazards.
  • The stain is simple, easily applicable worldwide.