Table-2.

Antigenicity of Brucella Omps as detected in sera from B. abortus 544-infected cattle.

Individual numbers of cows	Recombinant proteins used in ELISA as antigens
	Omp19		Omp25		Omp31
	Days p.i. with B. abortus 544
	14	28	14	28	14	28
	The ratio of ODt to ODc
6	3.6	11.5	5.5	14.2	1.7*	5.8
7	2.6	11.2	0.6*	3.5	1.0*	2.2
8	3.0	12.1	1.7*	8.1	0.8*	1.3*
9	2.9	10.9	2.3	9.6	1.8*	2.2
10	11.0	9.1	4.1	7.1	0.5*	2.4
16	5.4	12.0	2.7	9.0	3.6	2.5
17	4.6	11.8	1.5*	9.1	3.9	3.6
18	19.0	13.2	6.8	11.7	6.6	5.9
19	14.5	12.7	2.1	2.5	4.3	3.5
20	6.5	12.4	3.3	14.7	0.7*	0.8*
27	4.2	10.9	1.2*	8.4	1.6*	1.8*
30	5.5	11.6	3.2	8.1	4.0	2.2
ODt/ODc mean values	6.9±3.0	11.6±1.1	2.9±1.8	8.8±3.6	2.5±1.9	2.9±1.6

^*Negative result. B. abortus=Brucella abortus, ELISA=Enzyme-linked immunosorbent assay