Table 3.

Comparative effect of the environmental stress and standard growth conditions on spontaneous prophage induction

phage	MitC	0.4-fold LM17	34 °C	1% NaCl	2% NaCl
proΦ1	+		+
proΦ2	+	–	+
proΦ3	+			+	+
proΦ4	+	–	+
proΦ5	+	–	+
proΦ6	+	ND		+	+
proΦ7	+		+

The table summarises data shown in Additional file 3 and Additional file 4. (+) stress induction > standard induction; (−) stress induction < standard induction; (empty cell) not significant differences; (ND) not determined. MitC induction (0.3 μg/ml) was used as positive control