PrimeStore MTM should not be used with the Hologic Panther System due to a disinfecting step involving bleach that is specific to that platform.  PrimeStore MTM, like most lysis buffers and nucleic acid purification reagents, contains Guanidine.  Bleach and guanidine create cyanide gas which is why most molecular lab protocols use ethanol based decontamination and cleaning solutions rather than bleach.    To take advantage of the microbial inactivation and RNA stabilization qualities of PrimeStore MTM, users can safely test on a wide variety of high throughput platforms from Roche, Thermo Fisher, Abbott, Siemens, Luminex, BioRad, PSS, Promega, and BioMerieux, as well as the Cepheid GeneXpert point of care platform.



FDA: FAQs on Diagnostic Testing for SARS CoV-2


PrimeStore MTM validated for SARS-CoV-2 identification and NGS characterization

LHNVD is in close communication with the FEMA/HHS about supply capacity expansion.  We are working with buyers to optimize tube selection to match available swabs and to fit into existing automation systems. For specific questions email info@lhnvd.com.


Bleach should be avoided for clean up for most molecular tests and nearly all extraction reagents contain guanidine. Sample collection devices that claim inactivation/ and or stabilization that list their ingredients as proprietary should be considered to have Guanidine and other potentially reactive chemicals.



New wide mouth tubes added to provide users more options

-5 mL tube with 1.5 mL fill

-15 mL tube with 2.0 mL fill

Quality molecular testing requires optimized components at every stage, beginning at sample collection.

Longhorn's diagnostic products are optimized for molecular testing starting at the sample collection site with a focus on minimizing the cold chain to ensure molecular diagnostics can be used throughout the world.

Warning:  Do not drink, inject or inhale PrimeStore MTM, or any other products that act as disinfectants, for the Prevention or Treatment of COVID-19!  PrimeStore MTM is for sample collection only!

Simple sample collection system for nucleic acid testing

One solution for:

  • RNA, mRNA, and DNA

  • Inactivates pathogens (including SARS-CoV-2 for safer collection, transport, and testing

  • Blood, plasma, respiratory samples, urine, tissues, stool

  • Human, animal, avian, plant, environmental, forensics

  • Molecular testing, sequencing

  • Over 30 days of ambient temperature stability for RNA (117 day average from sample collection to extraction in one independent study)

Core Product: PrimeStore MTM

FDA Cleared: New Class II Predicate Device


USDA Foreign Animal Disease Diagnostic Laboratory (FADDL) validated

Other Products and Kits

Highly infectious and lethal pathogens can spread rapidly within countries and  across borders affecting human health and threatening the global food supply

Safe and accurate molecular testing across the healthcare and agriculture industries