resistance to antimicrobials

Percent resistance to antimicrobials from selected animal pathogens in food animals (in companion animals) data supplied by Bacteriology Section, ADDL, Purdue University (periods of July-Dec. 2007 and Jan.-June 2008)
	Beef								Dairy										Swine
Antibiotic	E. coli		Man. haemolitica		Past. multocida		Salmonella sp.		E. coli		Man. haemolitica		Past. multocida		Staph. aureus		Salmonella sp.		Haemophilus sp.		E. coli		Salmonella sp.		Strep. suis
	July- Dec.	Jan.- June	July- Dec.	Jan.-J une	July- Dec.	Jan.- June	July- Dec.	Jan.- June	July- Dec.	Jan.- June	July- Dec.	Jan.- June	July- Dec.	Jan.- June	July- Dec.	Jan.- June	July- Dec.	Jan.- June	July- Dec.	Jan.- June	July- Dec.	Jan.- June	July- Dec.	Jan.- June	July- Dec.	Jan.- June
Ampicillin	47	39	0	0	50	0	0	33	60	76	0	0	33	100	nt	nt	62	57	0	13	76	41	61	52	3	2
Ceftiofur	20	15	0	0	0	0	0	33	32	46	100	0	0	0	nt	0	46	52	0	0	34	36	44	19	4	2
Chlortetracycline	86	78	0	0	0	0	0	33	83	94	0	0	100	100	nt	nt	65	52	10	19	95	94	74	77	92	93
Clindamycin	100	100	100	100	100	100	100	100	100	100	0	100	20	100	nt	nt	100	100	10	13	100	100	100	100	90	85
Enrofloxacin	14	12	0	0	0	0	0	33	19	23	0	0	100	0	nt	nt	4	4	5	0	1	0	0	0	1	5
Florphenicol	57	61	0	0	0	0	0	33	62	73	0	0	0	0	nt	nt	58	57	0	0	63	59	57	52	0	0
Gentamicin	21	17	0	0	0	0	0	33	46	58	0	0	20	0	nt	nt	15	4	15	63	13	21	9	7	6	17
Neomycin	29	22	0	0	50	0	0	33	75	89	0	67	100	100	nt	nt	54	35	45	56	52	55	4	29	31	27
Oxytetracycline	86	81	100	0	50	33	0	33	85	97	0	33	80	100	nt	nt	69	57	35	50	97	95	83	81	94	97
Penicillin	100	100	0	nt	100	0	100	100	100	100	0	nt	100	100	100	nt	100	100	100	100	100	100	100	100	24	7
Spectinomycin	36	34	0	0	0	0	25	67	73	79	0	33	40	100	nt	nt	42	57	30	33	54	57	78	68	13	17
Sulphadimethoxine	60	68	0	33	100	0	75	100	59	78	0	50	67	100	100	0	92	83	20	13	80	81	83	94	73	70
Tiamulin	93	95	0	0	0	0	100	100	96	97	0	0	20	0	nt	nt	100	100	0	0	97	100	100	100	23	10
Tilmicosin	100	100	0	0	50	0	100	100	100	100	0	0	80	0	nt	nt	100	100	5	6	100	100	100	100	84	81
Triple Sulfa	36	22	0	0	0	0	0	33	65	77	0	0	20	100	nt	nt	31	13	5	0	21	26	9	10	1	7
Tylosin	nt	nt	nt	nt	nt	100	nt	nt	nt	nt	100	nt	nt	100	nt	nt	nt	nt	nt	nt	nt	nt	nt	nt	nt	nt
number of isolates	11	41	1	3	2	3	4	3	52	62	1	4	6	10	8	9	26	23	20	16	101	106	23	31	71	59
nt - not tested