Table 1.

Virulence properties of a S. typhimurium Dam⁻ mutant in BALB/c mice

Bacterial strain	LD50 (oral)*	LD50 (i.p.)
SL1344 (wild type)	6  ×  104	<10
SV1610 (Dam−)	>8.8  ×  108	6.5  ×  104
SV1610/pTP166	2.75  ×  105	<35
SV4036 (MutL−)	2.4  ×  106	<17

^*Oral inoculation was done by suspending bacteria in bicarbonate buffer before administration to mice.