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Charles River & Microbiome Promotion

Start your studies with confidence!

Transnetyx and Charles River have partnered to offer two free microbiome tests from Transnetyx for every mouse and/or rat strain you order from Charles River. Leveraging this special offer to capture microbiome data throughout the duration of your study will help you gain insights and avoid critical blind spots in your research. Take advantage of this great opportunity to enhance the reproducibility of your research.



Here is how:

  1. Place your order with Charles River.

  2. Complete this form and provide your Charles River order confirmation number to redeem your free tests.

  3. We will contact you with instructions and provide free sample collection supplies for ambient temperature collection, storage, and shipping to Transnetyx to get your free tests started.


*This offer is for North America only, valid for a one time redemption per mouse or rat strain per researcher.



Outside North America? Contact Transnetyx to request Microbiome testing on Charles River orders in your region.

Microbiome Analysis

The changing microbiome of your colonies can be a punch in the gut for the whole lab.

New evidence suggests the gut microbiome is the missing piece of the reproducibility puzzle, and that shifting gut microbiomes can significantly alter the phenotype of your mice.

Learn more

Why Transnetyx and Charles River?

Why Transnetyx?

You will only need to submit two fecal pellets per mouse in a Transnetyx provided kit — no dry ice needed! Once you place your order in Transnetyx QuickOrder, you will be able to analyze your samples, manage your data, and share results with colleagues and collaborators, all within an easy-to-use online interface.

Why the partnership?

The microbiome is an emerging field of interest when considering research animal characterization.  By opening access to scalable microbiome testing, Charles River allows users to promote reproducibility by documenting the microbial flora throughout the duration of studies. 

Although the general animal health of research models is secured through routine health monitoring as part of the quality control program, Charles River’s decision to provide third-party microbiome testing of their strains further shows their commitment to scientific rigor, transparency and objective data.