Longhorn PrimeStore Molecular Transport Medium Tubes Recalled for Cyanide Risk
Longhorn Vaccines and Diagnostic is recalling PrimeStore Molecular Transport Medium tubes because the solution may produce cyanide gas when exposed to bleach.
The agency’s classification
FDA (Devices): Class II
Class II is a situation in which use of or exposure to a violative product may cause temporary or medically reversible adverse health consequences, or where the probability of serious adverse health consequences is remote.
This is the agency’s own classification, taken from its notice. The severity score below is our assessment, not the agency’s. How recall classes work
What this means for you
Our assessment, not the agency’s: severity 3/5 (High).
Real risk of harm even if no illness or injury has been reported yet. Stop using the product and follow the agency's guidance.
Our severity reasoning: The recall involves a risk-of-harm product (cyanide gas generation) where injury has not yet been reported, fitting the High severity criteria.
Plain-English summary
Longhorn Vaccines and Diagnostic is recalling PrimeStore Molecular Transport Medium (PS-MTM) tubes, including model numbers LH-1-2, LH-1-3, LH-1-4, LH-1-5, LH-1-5CC, and LH-1-15CC. The product is intended for the stabilization, transportation, and inactivation of infectious unprocessed nasal washes, nasopharyngeal, and oral/throat swabs suspected of containing Influenza A virus RNA, as well as sputum samples suspected of containing Mycobacterium tuberculosis (MTB) DNA. The recall involves 1,936,050 units distributed nationwide, including in Maryland.
The recall was issued because the tubes may have been delivered to some users without labels, preventing identification of the product. More critically, the solution in these tubes contains guanidine thiocyanate. If samples stored or transported in these tubes are tested on certain systems or come into contact with bleach or reagents containing bleach, they can produce cyanide gas. This poses a risk of exposure to cyanide gas for laboratory personnel.
Users should identify any unlabelled tubes or tubes with the affected lot numbers (200421A, 200421B, E200427A, E200427B, E2000505B, CN200423, CN200427) and stop using them. Laboratory personnel should avoid exposing the solution to bleach or bleach-containing reagents to prevent the generation of cyanide gas.
The recalled product
- Product
- PrimeStore Molecular Transport Medium (PS-MTM), Model Numbers LH-1-2, LH-1-3, LH-1-4, LH-1-5, LH-1-5CC, LH-1-15CC - Product Usage: intended for stabilization, transportation, and inactivation of infectious unprocessed nasal washes, nasopharyngeal, oral/throat swabs* suspected of…
- Manufacturer
- LONGHORN VACCINES AND DIAGNOSTIC
- Affected units
- 1,936,050
Is your product affected?
Check your packaging against the codes below. If any of them match, the product is part of this recall.
Lot numbers (1)
- Lot Numbers: 200421A 200421B E200427A E200427B E2000505B CN200423 CN200427
Distribution
Related recalls
Other medical device recalls
- ModerateDRG Sperm Ab ELISA Recalled for Potential False Negative Results
FDA (Devices) · 2026-10-14
- SevereMedline Bariatric Rollator Recalled Due to Front Wheel Assembly Disconnect Risk
FDA (Devices) · 2026-10-14
- ModerateAVID Medical Recalls 23 ABD Hysterectomy Kits Due to Lubricant Contamination
FDA (Devices) · 2026-10-14
- ModerateAVID Medical Recalls GYN Laparoscopy Kits for Potential Lubricant Contamination
FDA (Devices) · 2026-10-14
- ModerateSteris HexaVue Focus Integration System Recalled for Patient Data Mismatch
FDA (Devices) · 2026-10-14
Similar recalls
- ModerateTG United Recalls CPM PSE Drops Due to CGMP Deviations
FDA (Drugs) · 2013-06-12
- HighKrishe Disposable Sampling Tubes Recalled for Missing Verification Data
FDA (Devices) · 2021-04-21
- SevereTorrent Pharma Recalls Pseudoephedrine Oral Solution Due to Potential Bacterial Contamination
FDA (Drugs) · 2019-06-19
- HighHardy Diagnostics Recalls Viral Transport Media Due to Contamination Risk
FDA (Devices) · 2020-12-30
- SevereTorrent Pharma Recalls Diphenhydramine Oral Solution Due to Bacterial Contamination
FDA (Drugs) · 2019-06-19
- SevereTorrent Pharma Recalls Nasal Decongestant Liquid Due to Bacterial Contamination
FDA (Drugs) · 2019-06-19