AcknowledgmentsThis work was partially supported by Project SAF

Table 3 shows the resistance AG 1879 detected among our resistant isolates recovered in SB agar plates. All tetracycline-resistant isolates carried the tet(M) and/or tet(L) genes. The erm(B) gene was detected in 34 of erythromycin-resistant isolates (92%), the ant(6)-Ia gene was found in four streptomycin-resistant isolates (57%), 22 of kanamycin-resistant isolates carried the aph(3′)-IIIa gene (88%) and the aac(6′)-Ie–aph(2″)-Ia bifunctional gene was detected in all 4 HLR-G enterococci (100%). The cat(A) gene was identified in only one chloramphenicol-resistant isolate (50%).
Table 3.
Resistance genes detected in the collection of 85 enterococci recovered from water samples recovered on SB agar plates.Species(number isolates)Resistance phenotype and genotypeAntibioticNumber of isolatesResistance genes(number isolates)E. faecium (54)Gentamicin2aac(6′)-Ie–aph(2″)-Ia (2)Kanamycin16aph(3′)-IIIa (13)Streptomycin3ant(6)-Ia (2)Erythromycin27erm(B) (24)Tetracycline8tet(M) (2), tet(M) + tet(L) (6)Chloramphenicol1No genes detectedE. faecalis (17)Gentamicin1aac(6′)-Ie–aph(2″)-Ia (1)Kanamycin7aph(3′)-IIIa (7)Streptomycin4ant(6)-Ia (2)Erythromycin7erm(B) (7)Tetracycline5tet(M) (2), tet(M) + tet(L) (3)Chloramphenicol1cat(A) (1)E. hirae (8)Kanamycin1aph(3′)-IIIa (1)Erythromycin1erm(B) (1)E. casseliflavus (4)Gentamicin1aac(6′)-Ie–aph(2″)-Ia (1)Kanamycin1aph(3′)-IIIa (1)Erythromycin2erm(B) (2)Others (2)Tetracycline2tet(M) (2)Full-size tableTable optionsView in workspaceDownload as CSV