TABLE 3.

Mean channel values for milk samples as measured by SCT and DCT^a

Group	No. of samples	Mean channel value by:
		SCT		DCT
		B. abortus	S. aureus	B. abortus	S. aureus
I	209	76 ± 1.7	78 ± 1.6	78 ± 1.5	79 ± 1.9
II	2	190 ± 3.6	78 ± 1.3	189 ± 5.6	80 ± 1.3
	6	240 ± 6	77 ± 1.4	245 ± 6.3	79 ± 1.3
	3	341 ± 7.8	77 ± 1.5	346 ± 8.8	80 ± 1.3
	3	425 ± 9.7	78 ± 1.4	419 ± 5.7	80 ± 1.4
	7	581 ± 6.4	78 ± 1.6	586 ± 8.4	79 ± 1.3
	5	757 ± 9.4	77 ± 1.3	764 ± 10	79 ± 1.4
III	13	76 ± 1.4	258 ± 5.2	79 ± 1.3	268 ± 5.2
	8	76 ± 1.4	365 ± 6	78 ± 1.5	360 ± 7
	7	76 ± 1.3	508 ± 7	79 ± 1.3	518 ± 7
	15	75 ± 1.5	671 ± 7.5	79 ± 1.4	681 ± 7.5
	13	76 ± 1.3	820 ± 11	78 ± 1.3	831 ± 9.8
IV	2	240 ± 6	256 ± 8.2	250 ± 6	246 ± 6.2
	2	341 ± 7	365 ± 7	345 ± 6.8	375 ± 9
	3	581 ± 7	508 ± 3	588 ± 7.4	498 ± 9.7
	2	423 ± 9	835 ± 10	429 ± 5	830 ± 9.2

^aAnimals were divided into the following groups: I, animals from herds free of brucellosis and mastitis; II, animals from herds with reported cases of brucellosis; III, animals from herds with reported cases of mastitis; and IV, animals from herds with reported cases of brucellosis and mastitis.