TABLE 3.
Distribution of antibiotic resistance genes in Listeria spp.
| Resistance phenotypea | Gene(s) [no. of strains] | Reference(s) |
|---|---|---|
| L. monocytogenes | ||
| Humans | ||
| Cm Em Sm Tc-Mc | cat221, ermAM, aad6, tet(S) [1] | 21, 35, 38 |
| Tc-Mc | tet(M)/int-Tn [24] | 36 |
| Tc | tet(L) [1] | 36 |
| Food and environment | ||
| Em | erm(C) [1] | 40 |
| Tc-Mc | tet(M)/int-Tn [36] | 9 |
| tet(M) [1] | 9 | |
| L. innocua (food) | ||
| Tc | tet(K) [1] | 15 |
| tet(M) [9] | 15 | |
| tet(K) + tet(M) [2] | 15 | |
| Tc-Mc | tet(M) [14] | 9 |
| tet(M)/int-Tn [5] | 9 | |
| tet(S) [3] | 9 | |
| Sm Tc-Mc | aad6, tet(M) [1] | 9 |
| L. welshimeri (food) | ||
| Tc-Mc | tet(M)/int-Tn [1] | 9 |
| tet(S) [1] | 9 |
a
Cm, chloramphenicol; Em, erythromycin; Km, kanamycin; Mc, minocycline; Rif, rifampin; Sm, streptomycin; Su, sulfonamide; Tc, tetracycline; Tp, trimethoprim.