Table 1.
Bacterial Isolates and Strains Utilized in the Study.
| Microorganism | Strain Number(s) or Relevant Properties | Source or Reference |
|---|---|---|
| Citrobacter braakii | 261 | This study |
| Citrobacter freundii | 411 | This study |
| Citrobacter koseri | 321 | This study |
| Enterobacter gergoviae | 811 | This study |
| Enterobacter taylorae | 551, 1081 | This study |
| Escherichia coli | 121 | This study |
| E. coli AG100/Kan | AG100 with kanR replacing the mar locus | White, et al, 1997 |
| E. coli AG100/Kan/pRU600 | AG100 with kanR replacing the mar locus; harbors plasmid conferring chloramphenicol resistance (CmR). | Aslanidis, et al, 1989 |
| E. coli AG112 | Δ1481–1485 in marR locus | Oethinger, et al, 2000 |
| E. coli DW2 pNOE73 | Contains plasmid pNOEC73 encoding ampR | Okazaki, et al, 1997; Wilson and Wilson, 1987 |
| Klebsiella pneumoniae | 32, 42, 61, 81, 901, 941 | This study |
| Proteus mirabilis | 281, 331, 361 | This study |
| Proteus vulgaris | 1481 | This study |
| Pseudomonas aeruginosa | 311, 841 | This study |
| Pseudomonas fluorescens | 851 | This study |
| Shigella spp. | 781 | This study |
| Serratia plymuthica | 211 | This study |
1
Isolates were obtained from corrals of dairies.
2
Isolates were from adjacent roads.