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Table 2 Results of the mating experiments

From: Detection and linkage to mobile genetic elements of tetracycline resistance gene tet(M) in Escherichia coliisolates from pigs

Donor strains*

Species

Transfer frequency to E. faecalisJH2-2 (tc/dn)

Transfer frequency to E. faeciumBM4105 (tc/dn)

Transfer frequency to E. coliCYCIT-70-Ri (tc/dn)

CICYT-381

E. faecalis

ND (<1 × 10−9)**

1.1 × 10−9

3.1 × 10−8

CICYT-436

E. faecalis

4.5 × 10−9

7 × 10−9

3.1 × 10−8

CICYT-453

E. faecalis

2.8 × 10−8

1.3 × 10−8

3.8 × 10−8

CICYT-467

E. hirae

3.6 × 10−6

ND (<0.7 × 10−9)

2.2 × 10−8

CICYT-268

E. coli

ND (<1.1 × 10−10)

ND (<1.7 × 10−10)

 

CICYT-320

E. coli

ND (<1.5 × 10−10)

ND (<1.4 × 10−10)

 

CICYT-332

E. coli

ND (<1.3 × 10−10)

ND (<1.5 × 10−10)

 

CICYT-348

E. coli

ND (<2.3 × 10−10)

ND (<1.8 × 10−10)

 
  1. tc/dn transconjugans/donor, ND no transconjugants detected. *All the strains were positive for the tet(M) gene but negative for the Tn916, Tn5397, and Tn5801 transposons. **(): detection limit.