Table 1.

Plating efficiencies and burst sizes

Strain	Host	Genotype	Relative efficiency of plating	Progeny per infective center
D364	IJ1133	Δhsd	1	72
	IJ891	hsdK+	3.7  ×  10−3	9*
	IJ891(pSB2)	hsdK+	<10−10
	IJ1178	hsdB+	1.6  ×  10−4
D364sK0	IJ1133	Δhsd	1	87
	IJ891	hsdK+	1.2	94
	IJ891(pSB2)	hsdK+	0.83
	IJ1178	hsdB+	3.4  ×  10−4
sRK836sK0	IJ1133	Δhsd	1
	IJ891	hsdK+	1.0
	IJ1178	hsdB+	0.87

*The ratio of infective centers per infected cell was 0.13.