Table 4.

Transfer frequencies of tetracycline resistance by filter mating methods.

	Strain	Transfer frequencies
Donors	04Ya001	(1.64 ± 0.56) × 10−5
	04Ya007	(1.37 ± 0.18) × 10−4
	04Ya016	(1.90 ± 0.73) × 10−5
	04Ya090	(7.71 ± 3.84) × 10−5
	04Ya108	(1.78 ± 0.16) × 10−7
	04Ya265	(1.08 ± 0.18) × 10−4
	04Ya311	(4.11 ± 0.84) × 10−4
Recipient	E. coli W3110
Donors	TJ001W1	(3.90 ± 1.21) × 10−5
	TJ007W1	(1.01 ± 0.08) × 10−3
	TJ016W1	<(2.12 ± 0.48) × 10−10
	TJ090W1	(1.00 ± 0.32) × 10−4
	TJ108W1	<(4.88 ± 0.28) × 10−10
	TJ265W1	(1.08 ± 1.03) × 10−4
	TJ311W2	(6.60 ± 3.01) × 10−5
Recipient	E. coli W3110Rifr