Table 5.

Conjugation frequency of icm mutants

Strain/mutant*	Conjugation frequency†
Wild type	10−3 to 10−4
icmB, icmD, icmG, icmJ, icmK, icmL, icmM, icmO, icmP, icmQ, icmS, icmX, lphA	10−3 to 10−4
icmC, icmE, icmF, dotA	10−5 to 10−6
icmR, icmT	10−7
Spontaneous rifampicin resistance	10−8

^*icmX and dotA are from the icmA–dotA region (5, 6). 

^†Transconjugants per donor.