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What's the Deal with Viral Transport Media?

Viral Transport Media, or VTM, is a liquid solution used to collect, transport, and maintain clinical specimens suspected to contain viruses, chlamydia, ureaplasma, or mycoplasma organisms. It comes in single use tubes, bulk containers, or even specimen collection kits. Once samples are collected via a sampling tool, such as a sterile swab, the collection tool is carefully transferred into the VTM and sealed for transport to the laboratory. The solution acts to maintain organism viability until testing can be completed.

There are several classifications of transport mediums, but VTM is typically a non-propagating culture media, which means if viruses are present they remain viable, but do not reproduce. This type of VTM usually contains buffers and proteins to mimic physiological conditions found within our bodies. This is done to prevent attenuation of the virus prior to testing; however, most NAAT (nucleic acid amplification tests) used today do not require viability, they only need the virus to be present for detection. Antibiotics are also incorporated into the media to inhibit or suppress background flora that is present in samples. If you think about where a swab goes for sampling, it is not surprising to know that bacteria and fungi are also present. If cultures of these organisms are also required, separate specimens must be collected and and different transport media, such as Amies Medium, should be used.

Viral Transport Media can be used to transport or store specimen potentially containing, but not limited to:



Coxsackievirus A

Cytomegalovirus (CMV)

Herpes Simplex Virus (HSV)

Varicella-Zoster Virus (VZV)





Infulenza Virus

Parainfluenza Virus


Rubeola Virus


Respiratory Syncytial Virus (RSV)

Rubella Virus




In late 2019, COVID-19 caused supply chain disruptions for many industries. Importing goods for the manufacture of VTM and specimen collections kits was problematic and resulted in backordered components and a shortage of testing supplies. S2Media, located in Spokane Valley, WA took this opportunity to source all VTM components of US origin. This includes all of our VTM raw materials, container/closure systems, and manufacturing equipment. Even the plastic pellets used to make our tubes and caps are made in the USA. We've taken the time to ensure that our supply chain is not interrupted, but also support other US businesses, many of which are also small businesses - just like ours.

Providing high quality products, and piece of mind, to our customers since 2015. Discover the S2M Difference Today!


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