TABLE 6.

Frequencies of IgG antibody (AU > 1) to AMA-1, EBA-175, and MSP-1 at different plasma dilutions in adults >40 years of age in areas of stable (n = 40) and unstable (n = 40) transmission

Antigen	No. of adults with IgG antibodies (%) at a dilution of 1:100		P value for 1:100 dilution	No. of adults with IgG antibodies (%) at a dilution of 1:1,000		P value for 1:1,000 dilution
	Stable	Unstable		Stable	Unstable
AMA-1	33 (82.5)	17 (42.5)	<0.001	38 (95.0)	20 (50.0)	<0.001
EBA-175	27 (67.5)	31 (77.5)	0.32	28 (70.0)	31 (77.5)	0.45
MSP-1	29 (72.5)	26 (65.0)	0.47	31 (77.5)	30 (75.0)	0.79