eoe sub articles

EoE Sub Articles

All procedures involving animal models have been reviewed by the local institutional animal care committee and the JoVE veterinary review board.
1. Eye Swab Preparation, Work Field Set-up, Mouse Eye Swabbing and Sample Enrichment
<ol>
	<li>Prepare Sterile Eye Swabs 
	NOTE: Sterile eye swabs are thinly coated wooden toothpicks with a fiber thin layer of cotton batting and made in house.
	<ol>
		<li>Autoclave appropriate ...

swab-based conjunctival commensal bacteria isolation: a technique to isolate commensal bacteria from conjunctiva of murine model

Source: Smith-Page, K. et al. <a href="https://www.jove.com/video/61672" target="_blank">Conjunctival Commensal Isolation and Identification in Mice</a>. J. Vis. Exp. (2021)
This video describes a swab-based technique to isolate viable commensal bacteria from the ocular conjunctiva. The technique can be used to profile the commensal bacterial microbiome of the conjunctiva, which plays a defensive role against pathogens.

<img alt="Figure 1" class="xfigimg" src="/files/ftp_upload/20745/20745_Figure1.jpg" /> 
Figure 1: In-house eye swab. 
(A) A thin, approximately 1 cm, piece of pulled cotton batting was held between the sterile toothpick point and index finger and the toothpick was rolled while maintaining slight pressure against the index finger until the cotton was completely rolled onto the toothpick tip. (B) Example of an eye swab.
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Swab-based Conjunctival Commensal Bacteria Isolation: A Technique to Isolate Commensal Bacteria from Conjunctiva of Murine Model

Source: Smith-Page, K. et al. Conjunctival Commensal Isolation and Identification in Mice. J. Vis. Exp. (2021)
This video describes a swab-based technique ...

Conjunctiva of the eye harbors commensal bacteria. This indigenous microflora protects the eye from infection by activating the immune cells to attack any harmful microbes that enter the eye linings.
To isolate commensal bacteria, place an anesthetized mouse in a lateral position. Take a sterile eye swab dipped in a suitable medium. Insert the wet swab tip into the medial conjunctival region of the left eye. Depress the eyeball and move the swab back and forth along the conjunctiva to collect a diverse commensal population.
Remove the swab and stir it into a tube containing microbial enrichment media. This step releases the entrapped bacteria from the cotton mesh of the swab into the media. Discard the swab and incubate the tube to facilitate the onset of bacterial growth.
Dispense a few drops of the eye swab inoculated enriched media onto a blood agar plate in the desired pattern and incubate. The casein and soy peptones present in the media supply nitrogen required for peptide synthesis while the sodium chloride maintains osmotic equilibrium.
Commensal bacteria possess hemolysin enzymes that digest the hemoglobin present in blood media. This produces a characteristic pattern on the agar plate, causing different bacteria to proliferate into morphologically distinct colonies. Count the number of colonies to determine their relative abundance in the conjunctiva.

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This video describes a swab-based technique to isolate viable commensal bacteria from the ocular conjunctiva. The technique can be used to profile the commensal bacterial microbiome of the conjunctiva, which plays a defensive role against pathogens.

Overview

Protocol

<img title="figure-representative results-58" alt="figure-representative results-58" class="xfigimg" src="/files/ftp_upload/20745/20745_Figure1.jpg" /> 
Figure 1: In-house eye swab. 
(A) A thin, approximately 1 cm, piece of pulled cotton batting was held between the sterile toothpick point and index finger and the toothpick was rolled while maintaining slight pressure against the index finger until the cotton was completely rolled onto the toothpick tip. (B) Example of an eye swab.
<p cla...

Swab-based Conjunctival Commensal Bacteria Isolation: A Technique to Isolate Commensal Bacteria from Conjunctiva of Murine Model

In This Article

Overview

Protocol

Representative Results

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