TABLE 3.

NaCl sensitivities of O157 isolates from mouse intestine

Strain(s)	No. of culturable strain 2 cells (CFU/0.1 ml)a after incubation in 13% NaCl water for:
	24 h	48 h	72 h
Controls
2	UC	UC	UC
5	103	0	0
Intestine-originating isolates  (of a total of 50 isolates)
28 isolates	UC	UC	UC
3 isolates	UC	106–278	54–110
10 isolates	UC	8–83	1–23
9 isolates	86–111	0–10	0

^aUC, uncountable because the numbers of colonies on TSA were too many to count.