TABLE 3

Agreement of the Portrait Toxigenic C. difficile Assay with other molecular C. difficile tests

TestNo. of specimens testedNo. of specimens with resultaAgreement (%)
P+/M+P+/MP/M+P/M
Gene Xpert275723b4c19697.5
GeneOHM169374d2e12696.4
Illumigene96186f07293.8
Total54012713639496.5
  • a “P” is the Portrait result, and “M” is the comparator molecular method result. “+” is positive for C. difficile, and “−” is negative for C. difficile.

  • b All 3 specimens were culture negative.

  • c Three specimens were culture negative, and one was culture positive.

  • d Three specimens were culture negative, and one was culture positive.

  • e One specimen was culture negative, and one was culture positive.

  • f Five specimens were culture negative, and one was culture positive.