Table 1: Patient cohort according to the number of specimens collected and according the results of C. difficile GDH/ toxin B EIA in fecal specimens.

Specimen/s Results Patients
Number 		%
single +/+ 50 9.9
single -/- 239 47.6
single +/- 45 9.0
total single 334 66.5
multiple always +/+ 14 2.8
multiple always -/- 52 10.4
multiple always +/- 6 1.2
total multiple always 72 14.4
multiple variable 96 19.1
Total 502 100

+/+, CD GDH positive/toxin B positive; -/-, CD GDH negative/toxin B negative, +/-, CD GDH positive/toxin B negative.