FDA Allows Marketing of the First Nucleic Acid-Based Test to Detect Multiple Pathogens from CSF

Article

The Food and Drug Administration (FDA) today allowed marketing of the first cerebrospinal fluid (CSF) nucleic acid-based test for simultaneous detection of multiple pathogens that can cause central nervous system infections. 

The FilmArray Meningitis/Encephalitis (ME) Panel uses CSF specimens from patients who have signs and/or symptoms of meningitis or encephalitis. It is intended as an aid in the diagnosis of those diseases when used in conjunction with other clinical and laboratory findings. 

Meningitis and encephalitis are inflammatory diseases of the membranes that surround the brain and spinal cord and can be caused by bacterial, viral or yeast infections. Such infections can cause brain damage and can be fatal if not treated rapidly.

The FilmArray ME Panel is designed to simultaneously test for 14 bacterial, viral and yeast pathogens using a small sample of CSF and can provide results in about an hour, which may enable clinicians to make informed treatment decisions earlier. Currently, testing CSF for multiple organisms is not always possible because it can be difficult to obtain enough fluid from each patient to run multiple tests. Identification of the cause of bacterial central nervous system infections may sometimes take up to three days using current methods. Testing for viral infections may take even longer because many hospital laboratories do not perform such tests and specimens must then be shipped to specialized laboratories for testing.

“Testing one sample for many pathogens and potentially having test results sooner should allow physicians to use this information, along with other clinical findings and test results, to provide improved diagnosis and treatment for these very serious illnesses,” says Alberto Gutierrez, director of the Office of In Vitro Diagnostics and Radiological Health at the FDA’s Center for Devices and Radiological Health.

Bacteria and yeast pathogens identified by the FilmArray ME Panel are Escherichia coli K1, Haemophilus influenzae, Listeria monocytogenes, Neisseria meningitidis, Streptococcus agalactiae, Streptococcus pneumoniae and Cryptococcus neoformans/gattii. Viruses identified by the FilmArray ME Panel are Cytomegalovirus, Enterovirus, Herpes simplex virus 1, Herpes simplex virus 2, Human herpesvirus 6, Human parechovirus, and Varicella zoster virus.

However, the FilmArray ME Panel does not detect all causes of central nervous system infections or provide information about which antimicrobial drugs may be most effective for treating bacterial infections.  Physicians should continue to perform standard CSF bacterial and fungal cultures in conjunction with the FilmArray ME Panel because false negative and false positive results are possible with the FilmArray ME Panel, and bacterial growth is needed for drug susceptibility testing when results are positive. False negative results could potentially occur when the concentration of organisms in the CSF specimen is below the limit of detection for the FilmArray ME Panel.

The FDA reviewed data for the FilmArray ME Panel through the de novo classification process, a regulatory pathway for some low- to moderate-risk devices that are novel and not substantially equivalent to any legally marketed device. The clinical performance of the FilmArray ME Panel was evaluated by a prospective study of CSF samples taken from 1,560 patients with suspected meningitis/encephalitis where results for the FilmArray ME Panel were compared to results from other test methods, including culture. Another study included 150 clinical CSF samples that were previously determined to contain microorganisms, while a third study included 425 CSF samples that were artificially prepared with specific concentrations of bacteria or viruses. Study results demonstrated high agreement between the FilmArray ME Panel, comparator methods and expected results.

The FilmArray ME Panel is manufactured by BioFire Diagnostics L.L.C., in Salt Lake City, Utah.

Source: FDA

Recent Videos
Pathogen Playbook Presenter: Sharon Ward-Fore, BS, MS, MT(ASCP), CIC, FAPIC
Mark Wiencek, PhD
Rebecca Crapanzano-Sigafoos, DrPH, CIC, AL-CIP, FAPIC
The CDC’s updated hospital respiratory reporting requirement has added new layers of responsibility for infection preventionists. Karen Jones, MPH, RN, CIC, FAPIC, clinical program manager at Wolters Kluwer, breaks down what it means and how IPs can adapt.
Studying for the CIC using a digital tablet and computer (Adobe Stock 335828989 by NIKCOA)
Infection Control Today's Conversations with the HSPA President, Arlene Bush, CRCST, CER, CIS, SME, DSMD, CRMST
Infection Control Today's Conversations with the HSPA President, Arlene Bush, CRCST, CER, CIS, SME, DSMD, CRMST
Cheron Rojo, BS, FCS, CHL,  CER, CFER, CRCST
Matthias Tschoerner, Dr Sc
Standardizing Cleaning and Disinfection
Related Content