TABLE 2.

Antibody response in immunized mice^a

Plate coated with	Response when incubated with:
	Normal serum	Positive serum	Anti-PIgphage	Anti-NF	PIgphage	NF
PT1	0.184	0.248	0.135	0.168
TAg	0.554	2.258	0.469	0.547
PIgphage	0.484	0.366	1.856	1.720
Normal serum					0.289	0.525
Anti-PIgphage					1.624	1.627
Anti-TAg					0.247	0.533
Anti-NF					1.929	1.855

^aThe presence of specific antibodies was measured by ELISA as described in Materials and Methods. Sera from T. crassiceps-infected and noninfected mice were used as positive and negative controls, respectively. Phage particles (PIgphage and NF) were used at 2 × 10⁹. Sera used were diluted 1:20. Anti-PIgphage, anti-TAg, and anti-NF are pooled sera from mice immunized with the corresponding antigen (five mice in each group).