Phenotypic and Genotypic Characterization of Animal-Source Salmonella Heidelberg Isolates
Table 2
Summary statistics of minimum inhibitory concentrations (MIC) values for S. Heidelberg isolates by source, time frame of recovery, and species of origin.
ABTC
MIC by source
MIC by time frame
MIC by species
(µg/mL)
(µg/mL)
(µg/mL)
CLIN
ENV
<2006
2006–2011
2012-2013
BO
CH
TU
EQ†
AMC
Mode
1/0.5
1/0.5
1/0.5
1/0.5
1/0.5
1/0.5
1/0.5
1/0.5
1/0.5
Range
1/0.5–32/16
1/0.5
1/0.5
1/0.5–32/16
1/0.5–32/16
1/0.5–32/16
1/0.5–2/1
1/0.5–32/16
1/0.5
AMP
Mode
1
1
1
1
1
1
1
1
1
Range
1–32
1-2
1-2
1–32
1–32
1–32
1-2
1–32
1
AZI
Mode
4
4
4
4
4
4
4
4
8
Range
2–16
2–8
4–8
2–8
2–16
2–8
2–8
4–16
4–8
FOX
Mode
2
2
2
2
1
32
2
2
4
Range
0.5–32
1-2
1–4
0.5–32
1–32
0.25–32
1-2
2–32
2–4
TIO
Mode
1
0.5
1
0.5
0.5
8
0.5
1
1
Range
0.25–8
0.5–1
0.5–1
0.5–8
0.5–8
0.25–8
0.5–1
1–8
0.5–1
AXO
Mode
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
Range
0.25–64
0.25
0.25
0.25–64
0.25–32
0.25–64
0.25
0.25–32
0.25
CHL
Mode
4
4
8
4
5
4
4
8
8
Range
4–32
4–8
4–8
4–32
4–16
4–32
4–8
4–16
4–8
CIP
Mode
0.015
0.015
0.015
0.015
0.015
0.015
0.015
0.015
0.03
Range
0.015–0.03
0.015
0.015–0.03
0.015
0.015–0.03
0.015
0.015
0.015–0.03
0.015–0.03
GEN
Mode
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
1
Range
0.5–16
0.25–8
0.5–16
0.5–16
0.25–8
0.5–16
0.25–16
0.5
0.5–1
KAN
Mode
8
8
8
8
8
8
8
8
8
Range
8–64
8
8–32
8–64
8–32
8–64
8–32
8
8
NAL
Mode
4
4
4
2
4
4
4
4
4
Range
2–4
2–4
2–4
2–4
2–4
2–4
2–4
2–4
2–4
STR
Mode
32
32
32
32
32
32
32
32
32
Range
32–64
32
32
32–64
32
32–64
32
32
32
SUL
Mode
1
1
1
1
1
1
1
1
128
Range
1–256
1–128
1–256
1–256
1–256
1–256
1–256
1
1–128
TET
Mode
4
4
4
4
4
32
4
4
32
Range
4–32
4
4–32
4–32
4–32
4–32
4–32
4
4–32
SXT
Mode
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
Range
0.12–4
0.12–2
0.12
0.12–4
0.12–2
0.12–4
0.12–2
0.12
0.12
ABTC = antimicrobial tested; CLIN = clinical, ENV = environmental; CH = chicken; BO = bovine; EQ = equine; TU = turkey; AMC = amoxicillin-clavulanic acid, AMP = ampicillin, AZI = azithromycin, FOX = cefoxitin, TIO = ceftiofur, AXO = ceftriaxone, CHL = chloramphenicol, CIP = ciprofloxacin, GEN = gentamicin, KAN = kanamycin, NAL = nalidixic acid, STR = streptomycin, SUL = sulfisoxazole, TET = tetracycline, and SXT = trimethoprim/sulfamethoxazole; †Mode MIC was listed to the greater of the two values; MIC values are significantly () different between sources; MIC values are significantly () different between time frames; MIC values are significantly () different between species.
