Table 3. Occurrence of bacterial contamination in shiitake mushrooms procured for this study.

Organism	Number of samples positive for each microorganism
	Internet market			Local (Virginia) market
	Whole (IW, n = 20)	Sliced (IS, n = 28)	Powdered (IP, n = 14)	Whole (LW, n = 20)	Sliced (LS, n = 8)
Coliforms	0	0	0	14	7
E. coli	0	0	0	0	0
Listeria spp.	0	0	0	1	2
L. monocytogenes	0	0	0	0	0
Salmonella	0	0	0	0	0