MagNA Pure LC Total Nucleic Acid Isolation Kit - Large Volume; Catalog # 03264793001.

False Positive Results: Product labeling states cross contamination is not an issue for high viral load titer samples, but the firm has determined that a potential sample contamination may not be detected at these levels and could result in false positive results being reported.

Consignees were sent an Urgen Medical Device Correction letter dated 5/14/07 which instructs them to define and establish a lower detection limit, to use UNG to prevent carryover whenever possible, and to confirm low positive results through an independent experiment. A revised device correction letter dated 6/15/07 was subsequently sent to each consignee updating the reason for recall and associated risks.