TABLE 1.

Percentage of cells exhibiting CPE following IHNV exposure

Virus dilution	Cells	% of cells with CPE on day post-IHNV exposure:
		1	2	3	6
10−2	CHSE	0	5–10	30–40
	CHSE-FN2	40–50	70–80	100
	CHSE-FN1	5	10–20	50–60
10−3	CHSE	0	<5	5
	CHSE-FN2	5	30–40	70–80
	CHSE-FN1	0	10	10
10−7	CHSE				0
	CHSE-FN2				50–60