TABLE 1.

Invasion by 38 P. falciparum field isolates from The Gambia, West Africa, of untreated and neuraminidase- and trypsin-treated cells

Sample	Parasitemiaa				% Inhibitionb in the following cells:
	In patient	In assays of the following cells:
		Control	Nm treated	Tryp treated	Nm treated	Tryp treated
JB04	11.2	5.6	2.2	1.5	61	73
JB05	11.6	4.0	2.4	2.7	39	32
JB08	9.3	4.3	0.8	1.6	83	64
JB12	4.6	3.4	1.5	0.6	56	83
JB13	7.0	2.1	1.0	0.7	52	68
JB14	12.2	4.4	1.4	0.6	69	87
JB15	9.4	2.6	0.6	1.5	79	42
JB16	3.0	2.8	0.9	0.5	66	81
JB17	9.6	3.4	0.9	0.6	75	83
JB19	9.1	5.5	2.6	0.5	52	91
JB20	10.7	3.1	2.2	0.4	30	86
JB23	4.8	1.8	0.8	0.4	58	79
JB24	6.1	1.2	0.9	0.1	23	95
JB25	7.9	6.0	2.6	0.2	56	97
JB28	3.1	3.7	1.4	0.3	64	93
JB29	10.0	5.9	1.6	0.7	74	89
JB30	14.8	3.6	0.5	0.3	87	91
JB32	5.2	4.0	2.0	0.4	52	91
JB34	15.2	6.2	2.6	0.6	57	90
JB37	6.7	4.1	2.0	0.3	52	94
JB41	10.3	4.0	1.7	0.1	56	97
JB42	2.9	2.8	0.4	0.2	86	93
JB44	8.2	3.1	0.8	0.4	74	86
JB46	3.4	2.6	1.0	0.1	62	95
JB47	7.5	8.9	3.3	0.4	63	95
JB48	11.6	2.9	1.0	0.3	65	88
JB50	7.0	4.9	1.7	0.7	65	86
JB51	1.7	3.7	2.0	0.2	48	95
JB52	5.5	2.4	1.9	0.4	21	82
JB53	5.8	2.6	1.4	0.1	46	95
JB54	8.7	3.5	1.1	0.1	69	96
JB56	3.9	1.9	0.6	0.2	68	90
JB61	8.1	3.1	1.8	0.2	43	93
JB62	10.2	3.1	0.7	0.1	78	97
JB65	6.4	3.1	1.5	0.2	51	93
JB67	3.4	2.5	0.7	0.0	73	99
JB68	3.3	2.2	1.1	0.2	50	93
JB69	7.2	4.7	0.9	0.2	81	97

^aCalculated as the average number (from triplicate wells) of infected erythrocytes per 1,000 erythrocytes counted. Nm, neuraminidase; Tryp, trypsin.

^bCalculated as [1 − (parasitemia in enzyme-treated cells/parasitemia in control cells)] × 100.