TABLE 4.

T. denticola hemolytic activity mediated by Msp

Challengea	% Hemolytic activityb after pretreatment with:
	Saline	Anti-rMsp IgG	Rabbit IgG
Saline	12 ± 6.0	NDc	ND
SDS	100 ± 5.7	ND	ND
T. denticola	92 ± 5.4	31 ± 8.6	98 ± 4.6
Msp	95 ± 3.2	45 ± 9.0	91 ± 11.1
rMsp	96 ± 5.0	42 ± 2.6	97 ± 5.3

^aErythrocytes were incubated with the listed materials in saline for 2 h at room temperature. 

^bHemolytic activity is expressed as a percentage of the positive-lysis control (SDS), as measured by absorbance at 550 nm. 

^cND, not done.