Updates from CDC
Changes to CDC RT-PCR for SARS-CoV-2 Testing
After December 31, 2021, CDC will withdraw the request to the U.S. Food and Drug Administration (FDA) for Emergency Use Authorization (EUA) of the CDC 2019-Novel Coronavirus (2019-nCoV) Real-Time RT-PCR Diagnostic Panel, the assay first introduced in February 2020 for detection of SARS-CoV-2 only.
CDC is providing this advance notice for clinical laboratories to have adequate time to select and implement one of the many FDA-authorized alternatives. Visit the FDA website for a list of authorized COVID-19 diagnostic methods. For a summary of the performance of FDA-authorized molecular methods with an FDA reference panel, visit this page.
SARS-CoV-2 Variant Classification Updates
On July 20, 2021, CDC announced that SARS-CoV-2 variant AY.3 is now aggregated with Delta variant B.1.617.2. As new data become available, CDC will continue to evaluate the independent classifications of AY.1, AY.2, and AY.3.
Additionally, SARS-CoV-2 variant P.2 (Zeta) is no longer classified as a variant of interest due to declining prevalence and very few detections in recent months. CDC continues to monitor all variants circulating within the United States.
For more information, visit the SARS-CoV-2 Variant Classifications and Definitions page and the COVID Data Tracker.
FDA Revokes EUA for Curative SARS-CoV-2 Assay
On July 15, 2021, the U.S. Food and Drug Administration (FDA) revoked the emergency use authorization (EUA) for the Curative SARS-CoV-2 Assay. Effective immediately, laboratories and testing sites should discontinue use of the Curative test. Refer to the FDA Letter of Revocation for more information.
CDC Health Advisory
This information is being provided at the request of the CDC subject-matter experts for Burkholderia pseudomallei.
The Georgia Department of Public Health, with assistance from the U.S. Centers for Disease Control and Prevention (CDC), is investigating a fatal case of Burkholderia pseudomallei infection (i.e., melioidosis) identified in late July 2021. Based on genomic analysis, this case in Georgia closely matches the three cases previously identified in Kansas, Minnesota, and Texas in 2021, indicating that all four cases most likely share a common source of exposure.
The Kansas Department of Health and Environment, the Minnesota Department of Health, and the Texas Department of State Health Services continue to investigate the three previous cases with assistance from CDC. This Lab Alert serves as an update to the previous Lab Alert issued on July 1, 2021.
What Laboratories Should Know
- Culture of B. pseudomallei from any clinical specimen is considered diagnostic for melioidosis. Ideal specimens for culture include blood, urine, throat swab, and, when relevant, respiratory specimens, abscesses, or wound swabs.
- Because cultures may grow B. pseudomallei, it’s important for laboratory personnel to observe appropriate laboratory safety precautions.
- Laboratory testing involving automated identification algorithms (e.g., MALDI-TOF, 16s, VITEK-2) may misidentify B. pseudomallei as another bacterium. The isolate from the Texas case was initially misidentified as B. thailandensis by MALDI-TOF.
- If B. pseudomallei is identified or an organism is suspicious for B. pseudomallei, contact your state or local public health laboratory or Laboratory Response Network (LRN) Reference Laboratory immediately.
CDC has also issued a health alert notification (HAN) to inform physicians about this situation and provide recommendations.
Any questions or comments regarding this message should be directed to your state or local public health laboratory.