TABLE 1.

Effect of increasing MOI on virus yields from L-929 cells

Variant	MOI	Virus yielda (PFU/cell)
GDVII	5	1,261
	20	1,190
	80	2,459
dl-L	5	5
	20	18
	80	31

^aL-929 cells were infected with TMEV variants at various MOIs and incubated at 37°C. At 24 h p.i., virus yields were determined by plaquing on BHK-21 monolayers.