Table 1.

Serology titers of specimens.

	Titer	Phase I													Total
		<16	16	32	64	128	256	512	1,024	2,048	4,096	8,192	16,384	>32,768
Phase II	<16	53,898	145	64	38	17	10	3	1	1	1	0	0	0	54,178
	16	658	547	129	98	21	7	8	0	0	0	0	0	0	1,468
	32	390	424	270	135	40	8	5	1	0	0	0	0	0	1,273
	64	472	663	330	501	124	72	10	3	1	0	0	0	0	2,176
	128	183	295	243	344	258	124	28	9	3	0	0	0	0	1,487
	256	102	208	128	381	213	323	63	46	9	2	0	1	0	1,476
	512	34	18	21	51	75	91	109	51	16	5	1	0	0	472
	1,024	31	11	12	43	23	125	57	296	33	27	3	1	0	662
	2,048	23	4	4	9	16	20	24	51	97	45	12	2	0	307
	4,096	8	2	1	4	5	15	12	31	22	41	22	19	3	185
	8,192	7	0	1	3	3	5	8	17	10	17	20	32	17	140
	16,384	4	0	1	0	0	0	2	7	10	12	13	21	30	100
	> 32,768	2	0	0	1	1	0	2	5	5	5	11	21	129	182
Total		55,812	2,317	1,204	1,608	796	800	331	518	207	155	82	97	179	64,106

Titers shown in bold indicate elevated phase II serology (≥128) and those in italics indicate elevated phase I serology (≥1024). Categories are not mutually exclusive; specimens may fit both categories. A portion of the data (0.58%) are not diluted to end-point and instead are included at the highest dilution tested. All of the specimens analyzed were diluted to at least 1:1024.