TABLE 2.

Differences in MICs for 44 isolates of B. hyodysenteriae tested in triplicate for comparisons of tests 2 and 3 with test 1

Antimicrobial agent	MIC range tested (μg/ml)	No. of MICsf								% of MICs within ±1 dilution
		−2	−1	Same	+1	+2	+3	+4	+5
Tiamulin	0.016-2	0	13	48	27	0	0	0	0	100
Tylosin	2-256	0	7	68a	13	0	0	0	0	100
Erythromycin	2-256	0	8	55b	15	7	2	0	1	89
Clindamycind	0.03-4	2	13	45c	24	2	0	0	0	95
Virginiamycin	0.25-16	3	12	54	19	0	0	0	0	97
Carbadoxe	0.004-0.5	6	15	25	21	9	1	1	0	78

^aFor 19 isolates, MICs were outside the range of the panel in all three tests.

^bFor 22 isolates, MICs were outside the range of the panel in all three tests.

^cFor 11 isolates, MICs were outside the range of the panel in all three tests.

^dForty-three isolates were compared (one isolate was excluded due to skipped wells).

^eThirty-nine isolates were compared (five isolates were excluded due to skipped wells or contamination).

^fValues are numbers of MICs that were identical or differed within a range of −2 to +5 dilution steps.