TABLE 1.

Protection from amebic liver abscess by active or passive immunization with 170CR2-PEP5 coupled to KLH

Immunization route	Vaccine group	No. of animals with liver abscess/no. of animals challenged	% Liver abscessed in nonprotected animals (mean ± SD)
Activea	KLH	10/10	8.5 ± 3.2
	KLH–170CR2-PEP5	10/15	2.2 ± 2.3c
Passiveb	Preimmune	6/6	13.8 ± 2.25
	Anti-KLH–170CR2-PEP5	2/6d	1.2 ± 0.04e

^aGerbils. 

^bSCID mice. 

^cP < 0.001. 

^dP < 0.03. 

^eP < 0.004.