TABLE 1.

Effects of FCS on in vitro schistosomicidal activity of arachidonic acid

Adult worm	FCS %	ARA concn (mM)	No. of worms investigated	No. of dead worms after incubation for (h):
				1	3	4	5a
S. mansoni	20	0	13 M, 5 F	0	0	0	0
		10	4 M, 5 F	0	All	All	All
		20	4 M, 7 F	0	All	All	All
	50	0	6 M, 6 F	0	0	0	0
		10	8 M, 9 F	0	0	7 M, 9 F	All
		20	7 M, 6 F	0	0	4 M, 5 F	All
	100	0	4 M, 7 F	0	0	0	0
		10	7 M, 6 F	0	0	0	All
		20	4 M, 5 F	0	0	0	All
S. haematobium	20	0	3 M, 4 F	0	0	0	0
		10	2 M, 4 F	0	All	All	All
		20	2 M, 3 F	0	All	All	All
	50	0	4 M, 2 F	0	0	0	0
		10	5 M, 2 F	0	1 M, 2 F	All	All
		20	4 M, 2 F	0	All	All	All
	100	0	4 M, 5 F	0	0	0	0
		10	3 M, 2 F	0	2 M, 1 F	All	All
		20	3 M, 3 F	0	1 M, 1 F	2 M, 2 F	All

^aAll worms were dead after washing and overnight incubation in ARA-free RPMI medium-20% FCS.