Table 1.

Antibodies against F. tularensis in patients determined by cELISA, iELISA, and MA^a

Patient	Blood collection (days after onset of tularemia)	Test
		cELISA (% inhibition)	iELISA (OD)	MA (titer)
P1	11	25.8	0.60	<10
	36	79.7	1.91	320
P2	12	54.1	1.84	20
	37	74.5	2.65	320
P3	37	84.9	2.99	>1,280
	83	80.4	3.07	>1,280
P4	1	9.9	0.27	<10
	13	43.4	0.79	40
P5	9	47.9	1.01	<10
	25	77.3	2.15	80
P6	80	78.2	2.54	320
P7	21	82.8	2.57	640
P8	ND	42.7	1.02	80
P9	87	75.8	2.66	320
P10	13	43.2	0.89	<10
P11	59	41.1	1.18	160
P12	ND	36.1	0.79	<10
P13	8	79.2	2.49	320
P14	78	54.8	2.44	>1,280
P15	ND	59.7	1.64	>1,280
P16	42	71.0	2.15	640
	89	53.4	1.68	320
P17	13	42.0	2.84	<10
	241	−1.5	1.31	40
P18	16	83.0	2.36	40
	23	94.2	2.86	160
	30	90.3	2.83	160
	59	86.1	3.34	80
	185	68.7	2.42	40
P19	16	66.6	0.95	40
	23	65.3	1.19	160
	30	66.2	1.18	160
	59	79.0	1.62	160
	185	60.2	1.01	40

^aA total of 34 serum samples of 19 patients were used. Sera of patients P1 to P5, P16, and P17 are paired samples obtained at the indicated days after the onset of tularemia symptoms. Patients P18 and P19 represent the five sets of samples obtained for several days after symptom onset. ND, not documented. Shaded numbers are values below the cutoff level in each test.