Severity
Moderate
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 containing Influenza A virus RNA. PS-MTM is also intended for the stabilization, transportation, and inactivation of infectious unprocessed sputum samples suspected of containing Mycobacterium tuberculosis (MTB) DNA from
Reported: September 23, 2020 Initiated: June 3, 2020 #Z-2952-2020 1,936,050 units
LONGHORN VACCINES AND DIAGNOSTIC issued this FDA Devices recall on September 23, 2020. Classified as Moderate severity (Class II). Approximately 1,936,050 units are affected. The recall was issued because: The tubes may have been delivered to some users without labels. Users may not be able to identify the tubes without the…. This recall notice is sourced from official FDA Devices enforcement records. Below you will find the complete product description, hazard information, remedy instructions, and related recalls from the same manufacturer or product category.
Recall Insight
This FDA Devices action (record #Z-2952-2020) was formally reported on September 23, 2020, with the manufacturer initiating the action on June 3, 2020. It is classified under Moderate severity (Class II), with a current status of Ongoing. LONGHORN VACCINES AND DIAGNOSTIC is listed as the recalling firm, operating out of Bethesda, MD. Federal records indicate 1,936,050 units are affected, placing this recall in the million-unit bracket that typically triggers nationwide consumer alerts and retailer sweeps.
The documented reason for this recall is: The tubes may have been delivered to some users without labels. Users may not be able to identify the tubes without these labels. If samples stored or transported in tubes are tested on certain systems or come into cont… Distribution data in the federal record shows the product reached: Nationwide distribution including in the state of MD.. Distribution scope directly affects the consumer exposure window and determines whether a recall remains regional or escalates into a nationwide advisory.
To put this record in context, PlainRecalls indexes 83,949 recalls across the FDA, CPSC, NHTSA and USDA FSIS going back to 1995. Within the same product category, the database holds 6 closely related recalls, of which 6 were also issued by FDA Devices. That clustering is a signal — repeated actions in a narrow category often indicate a systemic quality-control issue, a supplier-wide contamination, or a design defect that has propagated across product lines. This recall is roughly 6 years old; older recalls can remain relevant because many units enter resale, rental, and secondary-market channels where the original warning never reaches the end user. Always cross-check the recall number against the official agency page before relying on any summary.
Recall Distribution by Severity Class
Units Affected
1,936,050
Related Recalls
6
6 from same agency
Product Description
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 containing Influenza A virus RNA. PS-MTM is also intended for the stabilization, transportation, and inactivation of infectious unprocessed sputum samples suspected of containing Mycobacterium tuberculosis (MTB) DNA from human samples.
Reason for Recall
The tubes may have been delivered to some users without labels. Users may not be able to identify the tubes without these labels. If samples stored or transported in tubes are tested on certain systems or come into contact with bleach they can produce cyanide gas. The solution in these tubes contains guanidine thiocynate and may put laboratory personnel at risk of exposure to cyanide gas when it comes into contact with bleach or reagents containing bleach.
Details
- Recalling Firm
- LONGHORN VACCINES AND DIAGNOSTIC
- Units Affected
- 1,936,050
- Distribution
- Nationwide distribution including in the state of MD.
- Location
- Bethesda, MD
Recall Profile
| Attribute | Value |
|---|---|
| Agency | U.S. Food and Drug Administration |
| Severity class | Moderate (Class II) |
| Status | Ongoing |
| Recall number | Z-2952-2020 |
| Date reported | September 23, 2020 |
| Date initiated | June 3, 2020 |
| Recalling firm | LONGHORN VACCINES AND DIAGNOSTIC |
| Units affected | 1,936,050 |
| Distribution | Nationwide distribution including in the state of MD. |
Profile values are sourced directly from the official FDA Devices enforcement record. Source: U.S. Food and Drug Administration.
Frequently Asked Questions
What product was recalled? ▼
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 containing Influenza A virus RNA. PS-MTM is also intended for the stabilization, transportation, and inactivation of infectious unprocessed sputum samples suspected of containing Mycobacterium tuberculosis (MTB) DNA from human samples.. Recalled by LONGHORN VACCINES AND DIAGNOSTIC. Units affected: 1,936,050.
Why was this product recalled? ▼
The tubes may have been delivered to some users without labels. Users may not be able to identify the tubes without these labels. If samples stored or transported in tubes are tested on certain systems or come into contact with bleach they can produce cyanide gas. The solution in these tubes contains guanidine thiocynate and may put laboratory personnel at risk of exposure to cyanide gas when it comes into contact with bleach or reagents containing bleach.
Which agency issued this recall? ▼
This recall was issued by the FDA Devices on September 23, 2020. Severity: Moderate. Recall number: Z-2952-2020.
Where was the recalled product distributed? ▼
Distribution: Nationwide distribution including in the state of MD..
How do I check if my product is affected by a recall? ▼
Check the product description and recall number (Z-2952-2020) against your product. Visit the official FDA Devices website for the most current information. You can also use our Recall Checker tool to search by product name or brand.
Should I stop using a recalled medication or medical device? ▼
Do not stop using a recalled medication or device without consulting your healthcare provider first, as abruptly discontinuing treatment could pose its own health risks. Your doctor can advise on alternatives or whether the recall applies to your specific product lot. Check the recall number and lot information against your product packaging.
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Recall Context
Product recalls are issued when a manufacturer, distributor, or federal agency determines that a product poses a safety risk to consumers. This recall is classified as moderate severity, indicating the product may cause temporary or medically reversible health consequences. Across PlainRecalls, we track 83,000+ recalls from FDA, CPSC, and NHTSA to help consumers stay informed and act quickly when safety issues arise.
Related Safety Data
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Data Sources
Data as of 2025. Source: FDA, CPSC, NHTSA, USDA FSIS federal recall databases.
- Source: FDA — Food and Drug Administration, openFDA Enforcement API (food, drug, and medical device recalls)
- Source: CPSC — Consumer Product Safety Commission Recalls API (consumer product recalls and hazards)
- Source: NHTSA — National Highway Traffic Safety Administration Recalls API (vehicle safety recalls)
- Source: USDA FSIS — Food Safety and Inspection Service (meat, poultry, and egg product recalls)
Recall information is sourced from official federal agency databases. Always verify recall details with the issuing agency for the most current status. This information is for research and awareness purposes only.
Read our methodology — how this data is sourced, computed, and verified.
All federal data sources used on this page
- U.S. Census Bureau ACS — demographic + housing + income data. census.gov/programs-surveys/acs
- BLS Occupational Employment and Wage Statistics (OEWS) — wage + employment by occupation. bls.gov/oes
- BEA Regional Economic Accounts — GDP + personal income by state/metro. bea.gov/data/regional
- U.S. Census Bureau County Business Patterns — establishment + employment by industry. census.gov/cbp
- IRS Statistics of Income (SOI) — tax-return aggregate data. irs.gov/statistics
- data.gov — U.S. federal open-data portal — discovery layer for additional federal sources. data.gov
Source: Federal recall agencies (FDA, CPSC, NHTSA, USDA FSIS) Aggregated multi-agency recall feeds · 2024 Recall data normalized across federal agency feeds; severity classifications follow each agency's own taxonomy (FDA Class I/II/III; CPSC, NHTSA, USDA FSIS).