A medium in powder, liquid, broth or gel form, commonly available in a tub or bottle from which aliquots can be prepared, intended to be used to maintain the viability of microorganisms suspected of being present in a clinical specimen during its transport prior to in vitro diagnostic analysis and/or culture. It has a non-nutritive composition with or without indicator and may include types such as Amies, anaerobic, Carey-Blair, Stuart, and viral transport/inactivation mediums. This device is not a specimen collection tube/container (i.e., is not intended to directly accept a specimen), and does not include patient-contact specimen sampling/extraction devices such as swabs/brushes.