TABLE 4.

Determination of median lethal dosage (LD50) of CFJY-623.

Concentration (CFU/mL)	Dose (μL)	Number of tested fish	No. of death at different time				Mortality (%)
			12 h	24 h	36 h	2–7 days
109	200	10	10	10	10	10	100
108	200	10	9	10	10	10	100
107	200	10	1	1	1	1	10
106	200	10	0	1	1	1	10
105	200	10	0	0	1	1	10
PS	200	10	0	0	0	0	0