Table 1.

Genetic and physiological tests performed on the eight BIMs generated from the phage-sensitive strain ST1A.

	Analysis type
BIM code	PFGE profile	Stabilitya	Acidification	Phage profile against 78 phagesb
BIM1	Similar to ST1A	Stable	Similar to ST1A	Sensitivec
BIM2	Similar to ST1A	Stable	Slow	n.d.
BIM3	Similar to ST1A	Stable	Slow	n.d.
BIM4	Similar to ST1A	Stable	Similar to ST1A	Resistantd
BIM5	Similar to ST1A	Stable	Similar to ST1A	Resistant
BIM6	Similar to ST1A	Stable	Similar to ST1A	Sensitive
BIM7	Similar to ST1A	Instable	n.d.	n.d.
BIM8	Similar to ST1A	Instable	n.d.	n.d.

^aAssessed by growing the BIMs without phages for ca. 60 generations and thereafter exposing cells to the phages ϕ118 and ϕ218.

^bAll phages from the phage collection were used to assess the sensitivity of the BIMs.

^cAttacked by at least 1 phage out of the 78 tested.

^dResistant to all 78 phages.