BD Biosciences recalls Mouse IgG2a Isotype Control APC X39 ASR due to potential false positive staining from contamination. Affected units have catalog number 340757 and lot number 0253432.
Complaints have been received for performance issues related to high background and staining. this issues is related to a manufacturing process error that can potentially cause a false positive staining due to contamination with another antibody.
Take action
Contact the company
📍Recalling firmBecton, Dickinson and Company, BD Biosciences2350 Qume Dr · San Jose, CA 95131-1812
“BD Mouse IgG2a Isotype Control APC X39 ASR: False Positive Staining Risk.” GovInfoNow, updated August 19, 2026. https://govinfonow.com/recall/62173-bd-mouse-igg2a-isotype-control-apc-x39-asr-false-positive. Based on FDA recall #Z-2333-2021 (https://api.fda.gov/device/enforcement.json?search=recall_number:%22Z-2333-2021%22&limit=1).
The FDA announced on July 22, 2021, that BD Biosciences is recalling BD Mouse IgG2a Isotype Control APC X39 ASR due to potential false positive staining. The hazard stems from a manufacturing error causing contamination with another antibody.
How to tell if you have it
Brand: BD Biosciences
Product: BD Mouse IgG2a Isotype Control APC X39 ASR
Catalog Number: 340757
Lot Number: 0253432
The hazard
Complaints indicate performance issues related to high background and staining. This issue is linked to a manufacturing process error that can potentially cause false positive staining due to contamination with another antibody.
Context
GovInfoNow's records show Becton, Dickinson and Company, BD Biosciences has had 10 other recalls on record since May 16, 2018. Other recent recalls of similar products include BD Multitest 6-Color TBNK Kit Recall (May 8, 2024) and BD Biosciences CD11b APC Recall (Oct. 25, 2023). Other recent recalls of similar products include Biomerieux VITEK 2 AST-N461 Test Kit Recall (July 24, 2026), Biomerieux VITEK 2 AST-N447 Kit Recall (June 4, 2026), and S. Typhi/Para Ty Recall (Nov. 22, 2025).
How to tell if you have this one
Check for catalog number 340757 and lot number 0253432 on the product label. This specific product was sold by BD Biosciences for laboratory use.
Brand
BD Biosciences
Category
Medical device
Based on the official FDA remedy
What to do — step by step
Check Product Details
Verify the catalog number 340757 and lot number 0253432 on the product label.
Where it went and when
Where it was distributed
Distributed nationwide and abroad; the notice names 5 states.
Named in the notice
Covered by “nationwide”
Not listed
FDA distribution: “Worldwide distribution - U.S. Nationwide distribution in the states of CT, FL, KY, NY, and PA. The country of Taiwan.” States read from FDA’s own wording; “not listed” means the notice does not name it.
Named in the notice: Connecticut, Florida, Kentucky, New York, Pennsylvania.
Recall timeline
FDA terminated this recall 20 months after the firm started it.
1Firm started the recall
2FDA classified it Class II
3Published in FDA’s Enforcement Report
4FDA terminated the recall
Dates from the agency record only; steps without a date are left out.
The facts (hazard, remedy, dates, manufacturer) are pulled from the official FDA recall record. The plain-language summary and step-by-step checklist are written by GovInfoNow to make the official notice easier to act on — they don’t replace it.
Official source: FDA Recall #Z-2333-2021 (July 22, 2021) — FDA publishes no per-recall page; this is the official machine-readable enforcement record. Search FDA recalls for Z-2333-2021 to see it in context.
Plain-language summary written by qwen3:4b on August 19, 2026, from the official record above. Not reviewed by a person — if it conflicts with the FDA notice, the notice is correct. Report an error on this page.
GovInfoNow is an independent service and is not a government agency. We republish official FDA recall data; we don’t issue, amend or administer recalls.