Table 3.

Ehrlichia canis antibodies determined by IFA.

Group	Dog no.	Day −7	Day 71	Day 21	Day 28	Day 35	Day 42	Day 49	Day 56
Control	CC5 CDA	–	–2	POS	POS	POS	POS	POS	POS
	CD2 B63	–	–	–	–	–	–	–	–
	E46 0EE	–	–	–	POS	POS	POS	POS	POS
	CC4 90E	–	–	–	–	POS	POS	POS	POS
	CC2 21F	–	–	–	–	–	–	–	–
	9B4 937	–	–	POS	POS	POS	POS	POS	POS
Treated group	E17 E19	–	–	–	–	–	–	–	–
	DF5 A66	–	–	–	–	–	–	–	–
	964 441	–	–	–	–	–	–	–	–
	CC2 1BD	–	–	–	–	–	–	–	–
	CC2 25E	–	–	–	–	–	–	–	–
	CC4 55E	–	–	–	–	–	–	–	–

¹Prior to tick challenge

²negative; POS = positive.