Table 2.

Overview of median and range values for colony number and cell population for the groups without detectable colonies, with few colonies and with many colonies.

	Number of Colonies
	Not Observed	1–200	>200
Colony number	0	19 (1.5–180)	1367 (285–35,050)
Viable cell number (106)	0.26 (0–3.06)	0.18 (0.01–2.25)	2.46 (0.30–53.5)