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Goos J, Neff C, Holmberg K, Lyons A, Monroe N, Selvarangan R, Banerjee D, Hueschen LA, Chapin K, Tansarli G, Silbert S, Lima A, Connor BA, Rogova M, Steele M, Stubbs AM, Bard JD, Flores-Vazquez J, Andjelic C. 531. Clinical Evaluation of the BioFire® FilmArray® Gastrointestinal (GI) Panel for use with Rectal Swab Specimens in Cary-Blair Media. Open Forum Infect Dis 2022. [DOI: 10.1093/ofid/ofac492.586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Abstract
Background
The BioFire® FilmArray® Gastrointestinal (GI) Panel provides results for 22 bacterial, viral, and protozoan pathogens responsible for GI infection in about an hour. This test is indicated for use with stool specimens in Cary-Blair media (SCB) as a specimen type. For many patients, a stool sample can be difficult to provide during a single clinic visit, potentially delaying diagnosis and treatment. Rectal swabs in Cary-Blair (RSCB; an off-label sample type) are a more convenient and faster specimen type to collect, as collection can occur during a patient’s healthcare visit. The purpose of this study was to assess the performance of the GI Panel when testing RSCB compared to SCB.
Methods
Paired SCB and RSCB specimens were collected from outpatient subjects with signs of GI infection and tested in parallel using the GI Panel. All detections were confirmed using culture (for some bacterial analytes) and PCR/sequencing. Performance of the GI Panel in RSCB versus SCB specimen types was assessed using the ratios (RSCB/SCB) of sensitivities and false positive rates (FPR). Positive percent agreement (PPA) and negative percent agreement (NPA) for the GI Panel test in RSCB compared to SCB were also evaluated.
Results
A total of 299 paired SCB and RSCB specimens were collected and tested with the GI Panel. Detections for 17 of the 22 analytes on the GI Panel were observed in both specimen types. When comparing results from RSCB and SCB specimen types, the overall ratio of sensitivity was 0.86 and the overall ratio of FPR was 0.31. Further, overall PPA was 76.6% and overall NPA was 99.8%.
Conclusion
Overall, the GI Panel is sensitive and specific for the rapid detection of many of the organisms responsible for GI infection when using either specimen type, however RSCB specimens have a lower diagnostic yield (i.e. fewer detections) compared to SCB. As a result, GI Panel performance for the RSCB is characterized as less sensitive compared to performance for SCB specimens. Acknowledging these limitations, the convenience and time-to-result benefits of the RSCB specimen type may aid in the effective diagnosis and management of GI infection in outpatient settings.
The BioFire FilmArray GI Panel is not cleared or approved for use with rectal swabs in Cary-Blair.
Disclosures
Jared Goos, PhD, bioMerieux: Employee|bioMerieux: Stocks/Bonds Crissy Neff, n/a, bioMerieux: Employee|bioMerieux: Stocks/Bonds Kristen Holmberg, n/a, bioMerieux: Employee Annie Lyons, n/a, bioMerieux: Employee Nicole Monroe, Dr. sc. nat., bioMerieux: Employee Rangaraj Selvarangan, BVSc, PhD, D(ABMM), FIDSA, F(AAM), BioFire: Grant/Research Support|Luminex: Grant/Research Support Kimberle Chapin, MD, Cepheid: Employee Bradley A. Connor, MD, BioMerieux: Advisor/Consultant Cynthia Andjelic, PhD, bioMerieux: Employee.
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Affiliation(s)
| | | | | | | | | | | | | | - Leslie A Hueschen
- Children's Mercy Hospital/University of Missouri-Kansas City , KANSAS CITY, Missouri
| | | | | | | | | | - Bradley A Connor
- New York Center for Travel and Tropical Medicine , New York, New York
| | - Marina Rogova
- New York Center for Travel and Tropical Medicine , New York, New York
| | - Mark Steele
- University Health Truman Medical Center , Kansas City, Missouri
| | - Amy M Stubbs
- University Health-TMC/University of Missouri-Kansas City , FAIRWAY, Kansas
| | - Jennifer Dien Bard
- Children's Hospital Los Angeles; University of Southern California , Los Angeles, CA
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Connor BA, Rogova M, Garcia J, Patel D, Couto-Rodriguez M, Nagy-Szakal D, Rendel M. Comparative Effectiveness of Single vs Repeated Rapid SARS-CoV-2 Antigen Testing Among Asymptomatic Individuals in a Workplace Setting. JAMA Netw Open 2022; 5:e223073. [PMID: 35302635 PMCID: PMC8933730 DOI: 10.1001/jamanetworkopen.2022.3073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
This comparative effectiveness research study assesses the accuracy of single vs repeated antigen testing for diagnosis of COVID-19 among asymptomatic individuals in a workplace setting.
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Affiliation(s)
- Bradley A. Connor
- Weill Cornell Medicine, New York, New York
- The New York Center for Travel and Tropical Medicine, New York
| | - Marina Rogova
- The New York Center for Travel and Tropical Medicine, New York
| | | | | | | | - Dorottya Nagy-Szakal
- Biotia, Inc, New York, New York
- Department Cell Biology, College of Medicine, SUNY Downstate Health Sciences University, New York, New York
| | - Michael Rendel
- Mount Sinai School of Medicine, New York, New York
- Goldman Sachs Group Inc, New York, New York
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Connor BA, Couto-Rodriguez M, Barrows JE, Gardner M, Rogova M, O'Hara NB, Nagy-Szakal D. Monoclonal Antibody Therapy in a Vaccine Breakthrough SARS-CoV-2 Hospitalized Delta (B.1.617.2) Variant Case. Int J Infect Dis 2021; 110:232-234. [PMID: 34271202 PMCID: PMC8276551 DOI: 10.1016/j.ijid.2021.07.029] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 07/08/2021] [Accepted: 07/09/2021] [Indexed: 11/26/2022] Open
Abstract
We present two Delta (B.1.617.2) vaccine breakthrough individuals, a father and son living in separate households. The older, 63-year-old patient's symptoms were severe enough to require hospitalization. Despite having a high titer of anti-spike IgG in his serum, his symptoms resolved within 24 hours following monoclonal antibody (bamlanivimab/etesevimab) therapy.
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Affiliation(s)
- Bradley A Connor
- Weill Cornell Medicine, New York, NY, USA; The New York Center for Travel and Tropical Medicine, New York, NY, USA; GeoSentinel, New York, NY, USA.
| | | | | | - Morgan Gardner
- The New York Center for Travel and Tropical Medicine, New York, NY, USA; GeoSentinel, New York, NY, USA
| | - Marina Rogova
- The New York Center for Travel and Tropical Medicine, New York, NY, USA; GeoSentinel, New York, NY, USA
| | - Niamh B O'Hara
- Biotia, Inc., New York, NY, USA; SUNY Downstate Health Sciences University, The Department Cell Biology/College of Medicine, New York, NY, USA
| | - Dorottya Nagy-Szakal
- Biotia, Inc., New York, NY, USA; SUNY Downstate Health Sciences University, The Department Cell Biology/College of Medicine, New York, NY, USA
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Connor BA, Rogova M, Whyte O. Use of a multiplex DNA extraction PCR in the identification of pathogens in travelers' diarrhea. J Travel Med 2018; 25:4780170. [PMID: 29394385 DOI: 10.1093/jtm/tax087] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 11/29/2017] [Indexed: 11/12/2022]
Abstract
BACKGROUND Diarrhea is one of the most common ailments afflicting travelers with attack rates of 30-40% for medium to high-risk destinations. As travelers' diarrhea (TD) is syndromic and caused by a wide range of pathogens, including bacteria, parasites and viruses, multiplex deoxyribonucleic acid (DNA) extraction polymerase chain reaction (PCR) technology can be useful for determining the etiology of TD pathogens. OBJECTIVE The goal of this retrospective study was to produce clinically relevant and useful data on gastrointestinal illness related to travel identified by culture-independent methods of diagnosis-use of the multiplex DNA extraction PCR platform (BioFire FilmArray GI Panel) and to describe the use of this technology in detection of enteric pathogens. METHOD We reviewed our data in returned travelers from May 2014 to March 2017, looking at demographics, country of travel, number of pathogens found and pathogens by specific region. RESULTS Stool analysis by DNA extraction PCR was obtained in 388 post-travel patients. Three hundred and twenty-seven of these had diarrhea or other enteric symptoms. Sixty-one travelers presented with enteric symptoms and were diagnosed with post infectious irritable bowel syndrome (PI-IBS) after stool analyses were negative. Of those with diarrhea or gastrointestinal (GI) symptoms and excluding those diagnosed with PI-IBS, 207 patients tested positive for at least 1 enteric pathogen (63.4%). Eighty of those patients were found to have multiple pathogens. Viral pathogens were identified in 38 patients, 18% of the total number of cases. CONCLUSION The BioFire FilmArray GI Panel was associated with better detection of pathogens than historical controls while also allowing prompt and accurate diagnosis and potential treatment. A higher proportion of viral pathogens compared with historical assumptions was identified as well as mixed infections with multiple pathogens, a phenomenon largely unknown to clinicians before this technology became available.
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Affiliation(s)
- Bradley A Connor
- The New York Center for Travel and Tropical Medicine, New York, NY, USA.,Department of Medicine, Weill Cornell Medical College, New York, NY, USA
| | - Marina Rogova
- The New York Center for Travel and Tropical Medicine, New York, NY, USA
| | - Olga Whyte
- The New York Center for Travel and Tropical Medicine, New York, NY, USA
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Connor BA, Rogova M, Whyte O. Oral typhoid vaccine and culture independent testing for travelers' diarrhea. J Travel Med 2017; 24:4359926. [PMID: 29088488 DOI: 10.1093/jtm/tax071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 09/01/2017] [Indexed: 11/13/2022]
Affiliation(s)
- Bradley A Connor
- Weill Cornell Medical College, The New York Center for Travel and Tropical Medicine, New York, NY, USA
| | - Marina Rogova
- The New York Center for Travel and Tropical Medicine, New York, NY, USA
| | - Olga Whyte
- The New York Center for Travel and Tropical Medicine, New York, NY, USA
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