TABLE 2.

C₆ antibody levels in sera of dogs measured before treatment and 3, 6, and 12 months following treatment for dogs with initial C₆ levels in the moderate-to-high-C₆-level group (C₆ levels of 29 to 614 U/ml)

Dog no.	C6 antibody level (U/ml) at indicated no. of mos posttreatmenta				Treatment groupb
	0	3	6	12
1	29		<10	<10	LD
2	31	35	12		LD
3	45			16	HD
4	49	18	13	<10	LD
5	56		<10	<10	HD
6	64			<10	HD
7	82	26		37	LD
8	86	16		<10	HD
9	102	12	<10	<10	HD
10	102	66	36	17	HD
11	118	53		54	HD
12	124	54		12	HD
13	125	80	64	20	HD
14	137			25	HD
15	144		43	18	HD
16	149	10	10	47	LD
17	154	107	86	82	AM
18	156	185	103	37	LD
19	158	166	91	57	LD
20	159	80	45	40	HD
21	178	26		10	HD
22	237	138		38	HD
23	251			21	HD
24	258	99		84	HD
25	264			17	HD
26	289			10	HD
27	292	207	100	59	HD
28	326	45		12	HD
29	440	112	70	45	HD
30	614	75	51	36	HD

^aTime points that did not occur at 3, 6, or 12 months were adjusted to the nearest value, which was typically within ±1 month.

^bAM, amoxicillin; LD, low dose of doxycycline; HD, high dose of doxycycline.