Texas Panhandle Private Laboratory

June through September 1998

The chart below shows results of sensitivity testing of bovine isolates submitted to a private laboratory in the Texas Panhandle. Isolates were submitted during June, July, August and September 1998. The Kirby-Bauer method of testing was used.

SENSITIVITY RESULTS

June — September 1998

 

Ceft

Ffc

Tet

Til

Mannheimia haemolytica
N=58

S=56 (96)
I=
R=2 (4)

S=57 (98)
I=
R=1 (2)

S=26 (44)
I=15 (25)
R=17 (29)

S=45 (78)
I= 5 (8)
R-8 (14)

Pasteurella multocida
N=43

S=41 (95)
I=
R=2 (5)

S=40 (93)
I=
R=3 (7)

S=25 (58)
I=5 (12)
R=13 (30)

S=36 (84)
I=2 (5)
R=5 (11)

Haemophilus somnus
N=13

S=13 (100)
I=
R=

S=12 (92)
I=
R=1 (8)

S=13 (100)
I=
R=

S=1 (8)
I=3 (23)
R=9 (69)

N=Number tested, S=Sensitive, I=Intermediate, R=Resistant, (#)=%
Ceft=ceftiofur
Ffc=florfenicol
Tet=tetracycline
Til=tilmicosin