TABLE 1.

Effect of B. fibrisolvens JL5 on growth of various ruminal bacteria^a

Bacterium	Zone of clearingb	Log viable cells/ml
		Growth in JL5 supernatant	Growth in 49 supernatant
Gram-positive, carbohydrate-fermenting bacteria
B. fibrisolvens JL5	−	8.5 ± 0.7	9.0 ± 0.0
B. fibrisolvens 49	+++	NGc	9.0 ± 0.0
B. fibrisolvens AR10	++	NG	8.0 ± 0.7
B. fibrisolvens OB156	+++	0.5 ± 0.7	7.5 ± 2.1
B. fibrisolvens OB248	++	1.0 ± 1.4	8.0 ± 1.4
B. fibrisolvens B835	+++	4.5 ± 3.5	8.5 ± 0.7
B. fibrisolvens AR27	−	9.0 ± 0.0	9.0 ± 0.0
B. fibrisolvens OB236	−	8.5 ± 0.7	9.0 ± 0.0
B. fibrisolvens NOR37	−	9.0 ± 0.0	8.5 ± 0.7
R. albus B199	++++	NG	8.0 ± 1.4
R. flavefaciens FD-1	++++	NG	8.5 ± 0.7
S. bovis JB1	−	8.0 ± 0.0	8.5 ± 0.7
Gram-negative, carbohydrate-fermenting bacteria
P. bryantii B14	+	5.0 ± 1.0	8.0 ± 0.0
F. succinogenes S85	−	7.0 ± 1.4	8.5 ± 0.7
S. ruminantium HD-4	−	8.0 ± 0.0	8.0 ± 0.0
M. elsdenii B159	−	8.0 ± 0.0	8.0 ± 0.0
Gram-positive, obligate amino acid-fermenting bacteria
C. sticklandii SR	++++	NG	8.5 ± 0.7
Eubacterium sp. strain C2	+++	NG	7.0 ± 0.0
P. anaerobius C	+++	0.3 ± 0.6	7.7 ± 0.6
Peptostreptococcus sp. strain D1	++	0.5 ± 0.7	7.0 ± 0.0
Peptostreptococcus sp. strain S1	++	3.0 ± 0.0	8.0 ± 0.0
C. aminophilum F	+	6.0 ± 1.0	8.5 ± 0.6
Gram-negative, obligate amino acid-fermenting bacteria
Fusobacterium sp. strain D4	+	6.5 ± 0.7	9.0 ± 0.0

^aB. fibrisolvens 49 was used as a control.

^bThe zones of clearing ranged from nonexistent (−) to a diameter of >2.0 cm (++++).

^cNG, no growth detected.