TABLE 4.

Percent human macrophage (U937) viability over 24 h based on MOI

Infectious agent	Viabilitya
	0 hb			8 h			24 h
	1c	10	100	1	10	100	1	10	100
Serovar Typhimurium LT2	84.9 ± 0.74	84.4 ± 0.96	80.7 ± 1.05	87.7 ± 0.67	75.8 ± 2.20	67.6 ± 1.94	82.0 ± 1.41	66.8 ± 3.22	42.6 ± 4.32
Serovar Typhi Ty2	86.6 ± 0.83	86.1 ± 0.73	85.2 ± 0.79	88.6 ± 0.68	87.2 ± 0.63	85.8 ± 1.03	84.7 ± 0.94	82.8 ± 4.49	79.2 ± 1.47
Serovar Enteritidis 48-86	87.8 ± 0.79	85.9 ± 1.10	78.3 ± 1.15	87.7 ± 0.94	77.6 ± 2.41	72.8 ± 2.74	77.7 ± 2.31	64.6 ± 3.77	44.8 ± 2.70
None	86.8 ± 0.92			88.3 ± 0.94			88.0 ± 1.33

^aMean percentage of viable, trypan-negative, eukaryotic cells ± standard deviation based on at least three separate experiments done in triplicate. 

^bTime after infection with the salmonellae. 

^cMOI.