TABLE 2.
Resistance patterns of recipient E. coli, donors, and transconjugants to antibiotic resistance markers and extended-spectrum cephalosporins
| Organismb | pI transferred | Resulta for:
|
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| STR | CM | GEN | KAN | SXT | RIF | NAL | ATM | CTX | CAZ | CRO | TET | ||
| E. coli M2423 | S | S | S | S | S | S | S | R | S | S | S | S | |
| E. coli M2424 | S | S | S | S | S | S | R | S | S | S | S | S | |
| D1 E. aerogenes | R | R | R | R | R | R | S | R | S | R | R | R | |
| TS1 | 7.6 | S | R | S | R | S | R | S | R | S | S | R | S |
| D2 E. aerogenes | R | R | R | R | S | R | S | R | R | R | R | S | |
| TS2 | 7.6 | S | R | S | R | S | R | S | R | S | S | R | S |
| D3 E. aerogenes | R | R | R | R | S | R | S | S | R | S | R | R | |
| TS3 | 7.6 | S | R | S | R | S | R | R | S | S | S | R | S |
| D4 E. cloacae | R | R | R | R | R | R | R | R | R | R | R | R | |
| TS4 | 7 | S | R | R | S | S | R | S | R | S | S | R | S |
a
R, resistant; S, sensitive; STR, streptomycin; AMP, ampicillin; CM, chloramphenicol; GEN, Gentamicin; KAN, kanamycin; SXT, trimethoprim-sulfamethoxazole; RIF, rifampin; NAL, nalidixic acid; ATM, aztreonam; CTX, cefotaxime; CAZ, ceftazidime; CRO, ceftriaxone; TET, tetracycline.
b
E. coli M2423 is nalidixic, acid resistant. E. coli M2424 is rifampin resistant. D1, D2, D3, and D4 are Enterobacter donors 1 to 4. D1, D2, and D4 were mated with E. coli M2423 Nalr. D3 was mated with E. coli M2424 Rifr. TS1, TS2, TS3, and TS4 are transconjugants 1 to 4.