Time [Hours] stool held from collection prior to testing
Temperature and Test Method: 24 Hours 48 Hours 72 Hours
4°C1 Number tested3 % Positive: Number tested3 % positive Number tested3 % positive:
GD antigen 12 100.00 12 100.00 10 100.00
Toxin A/B antigen 11 91.67 12 100.00 9 90.00
CPE 11 91.67 11 91.67 10 100.00
Culture 12 100.00 12 100.00 10 100.00
Room Temperature2 N=12          
GD antigen 12 100.00 12 100.00 10 100.00
Toxin A/B antigen 11 91.67 11 91.67 7 70.00
CPE 11 91.67 10 83.33 9 90.00
Culture 12 100.00 12 100.00 10 100.00
1The average temperature [standard deviation] over 72 hours was 4.58°C [0.42].
2The average temperature [standard deviation] over 72 hours was 21.56°C [0.72].
3There were some samples lost during testing, so the number of samples tested at each time point varies.
Table 1: Stability of GD antigen, Toxin A and B antigen, CPE and toxigenic culture testing on stool samples stored at 4°C versus room temperature over 72 hours