The Water Cycle, a Potential Source of the Bacterial Pathogen Bacillus cereus

Table 5

B. cereus sl CFU isolated from groundwater.

Date of water sampling	B. cereus sl	Previous rainfall event
13 October 2011	0.17 (0.17)	06 August 2011 (54.5 mm)
		03 September 2011 (42 mm)
14 November 2011	0.96 (0.96)	01–07 November 2011 (163 mm)
06 April 2012	Below limit of detection (<0.96)	03–10 April 2012 (50 mm)^**
18 April 2012	0.43 (0.43)	03–10 April 2012 (50 mm)

The detection threshold is indicated in brackets and depends on the volume of water initially sampled.
^**First significant rainfall event after several months (previous rainfall event in November 2011).