title: Comparative Evaluation of Broad-Panel PCR Assays for the Detection of Gastrointestinal Pathogens in Pediatric Oncology Patients.
abstract: Broadly multiplexed molecular amplification assays offer an unprecedented ability to diagnose gastrointestinal infection in immunocompromised patients. However, little data are available to compare the performance of such systems in this population. A total of 436 stool samples were collected from 199 predominantly immunocompromised pediatric oncology patients. Remnant samples were tested in parallel with the use of the premarket (investigational use only) versions of two broadly multiplexed PCR assays (BioFire and Luminex), and the results of samples corresponding to the first episode per patient were compared with those from laboratory-developed molecular assays, culture, and antigen detection. Overall performance of the multiplexed systems was comparable, with BioFire and Luminex detecting 94 and 99 positives (P = 0.34), respectively. Stratifying by analyte, BioFire assay detected 51 samples positive for Clostridium difficile, whereas Luminex assay detected 60 (P = 0.01). Biofire and Luminex detected 28 and 38 norovirus-positive samples (P = 0.002), respectively. Astrovirus- and adenovirus-positive samples were detected in higher numbers by in-house PCR than by BioFire; the same was observed for adenovirus with Luminex. Differences observed with other analytes were minimal, did not reach statistical significance, or lacked the numbers needed to detect a difference between systems. Broadly multiplexed PCR offers an effective means of detecting a variety of gastrointestinal pathogens in pediatric oncology patients, with assay performance comparable among the tests examined.
authors: Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee.
authors: Zhengming
authors: Z
authors: Gu
authors: Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee.
authors: Haiqing
authors: H
authors: Zhu
authors: Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee.
authors: Alicia
authors: A
authors: Rodriguez
authors: Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee.
authors: Mohammad
authors: M
authors: Mhaissen
authors: Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee.
authors: Stacey
authors: S
authors: Schultz-Cherry
authors: Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee.
authors: Elisabeth
authors: E
authors: Adderson
authors: Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee. Electronic address: randall.hayden@stjude.org.
authors: Randall T
authors: RT
authors: Hayden
mesh_terms: D002648:Child; D016360:Clostridioides difficile / Q000235:genetics; D005243:Feces / Q000382:microbiology* / Q000821:virology*; D041981:Gastrointestinal Tract / Q000382:microbiology* / Q000821:virology*; D006801:Humans; D016867:Immunocompromised Host; D060885:Multiplex Polymerase Chain Reaction / Q000379:methods*; D011933:Reagent Kits, Diagnostic; D012680:Sensitivity and Specificity; D014780:Viruses / Q000235:genetics
chemical_list: D011933:Reagent Kits, Diagnostic