TABLE 6

Results of discrepant analysis

Analyte by FilmArray GI Panel resultTotal no.No. with investigation outcomea:
InconclusiveFA correctFA incorrect
False negatives
    Campylobacter spp.11b
    C. difficile toxin A/B211
    EAEC11
    EPEC33
    Shigella spp./EIEC22
    Adenovirus F 40/41211
    Norovirus GI/GII312c
    Total14905
False positives
    Campylobacter spp.24519d
    C. difficile toxin A/B4141
    P. shigelloides1515
    Salmonella spp.66
    Vibrio spp.22e
        V. cholerae11f
    EAEC2727
    EPEC341123
    ETEC963g
    STEC55
    STEC E. coli O15711
    Shigella spp./EIEC22
    Cryptosporidium spp.66h
    G. lamblia7142i
    Adenovirus F 40/4113211
    Astrovirus11
    Norovirus GI/GII18108
    Rotavirus A12111
    Sapovirus13112
    Total237331995
  • a Inconclusive, discrepant analysis did not help identify the underlying cause of discrepancy. FA correct, the result of discrepant analysis agreed with original the FilmArray (FA) result. FA incorrect, the discrepant analysis disagreed with the original FilmArray result.

  • b One FA false negative was due to missed detection of C. jejuni subsp. doylei.

  • c Two FA false negatives were due to missed detection of norovirus GI.

  • d Culture failed to identify 10 C. upsaliensis, eight C. jejuni, and one C. jejuni subsp. doylei organism.

  • e One specimen was determined to contain V. parahaemolyticus, and one contained V. cholerae.

  • f Specimen was determined to contain V. cholerae.

  • g Three FA false positives were identified as cross-reactivity with C. koseri (2) and H. alvei (1).

  • h FilmArray detected two C. felis, two C. ubiquitum, one C. parvum, and one Cryptosporidium spp. organisms for which species was not determined.

  • i Two FA false positives were identified as cross-reactivity with B. longum and R. callidus (one each).