Quidel Corp.

Product has the potential for false positive results

Dipstick strep A test has potential for false positive results.

There are two windows on the test device, the control line window and the test results window. The line for the test results window were misaligned. In instances of positive test results, the positivite test line may not be visible/ hidden under the cassette of the test device thus potentially leading to a false negative result.

There are two windows on the test device, the control line window and the test results window. The line for the test results window were misaligned. In instances of positive test results, the positivite test line may not be visible/ hidden under the cassette of the test device thus potentially leading to a false negative result.

One lot of the Sofia 2 Flu + SARS Antigen FIA (Lot 709083) was labelled with incorrect expiration dates. The kits contain pouched cassettes labeled with an expiration date of May 31, 2025, however the correct expiration date for the pouches is September 12, 2024. The kits are labeled with an expiration date of April 30, 2025, however, the correct expiration date for the kits is September 12, 2024. The issue was discovered on November 28, 2023 by a supply chain employee who determined that the kits had expiration dates beyond the FDA authorized shelf life.

Kits with affected microtiter plates have the potential to produce low OD values, causing the run to fail, per the Validation requirements of the Package Insert.

Revised Instructions for Use: Potential for specimens from patients with high SARS-CoV-2 viral loads to be falsely interpreted as negative if target amplification occurs prior to a cycle-threshold (Ct) value of 5 when using the Thermo Fisher QuantStudio 7 Pro, the Applied Biosystems 7500 Fast Dx, the Applied Biosystems 7500, the Bio-Rad CFX96 Touch", the Roche LightCycler LC 480 II/ cobas z 480, or the Qiagen Rotor-Gene MDx.

In rare situations patients infected with high viral load of SARS CoV 2 may have samples that generate Ct values less than or equal to (d) 5 when certain amplification and detection platforms (thermocyclers) are used. These specimens would be falsely interpreted as negative if target amplification occurs prior to a cycle threshold (Ct) value of 5. There have been no formal complaints of False Negative results with Ct values <5 from Lyra SARS-CoV-2 Assay users.

Due to false positive results.

Instructions for use in the package insert for SARS Antigen FIA test were updated to remove all references to a specific viral transport medium product as well as the use of other viral transport media. Use of the specific viral transport medium products may result in False-positive results. Directly testing from specimens (NS or NP swab) is recommended.

The calibration for the affected batch of analyzers was incorrectly set during the manufacturing process which may lead to a failure when calibration is first performed. There may also be e remote possibility that incorrect qualitative test results for patient samples near the assay cutoff may be reported.

In-house testing revealed the presence of plastic spurs at the tips of some Sample Collectors.

Quidel Corporation is recalling Influenza Transport Swab Packages because it may include an incorrect sample swab mixed in with the proper swabs.

Quidel Corporation has initiated a voluntary recall of specific lots of the Sofia Influenza A+B FIA kits because of false positive results which may lead to misdiagnosis.

The recall was initiated after Quidel Corporation determined that a small number of QuickVue One-Step hCG Urine kits have been incorrectly packaged with QuickVue H. pylori gll cassettes inside the kit boxes. These foil pouches and test cassettes are clearly labeled as H. pylori. Nevertheless, there is a risk that customers may overlook this labeling.