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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.