Table 4.

Frequencies (%) of 1. IFN-γ genotype and 2. IL-10 (estimated by the Hardy-Weinberg Equilibrium) alleles in African and mixed race ethnic control groups and other populations.

Allele	South African		#Italian Caucasians	+South-east England	†Manchester, UK	§China
	African	Mixed race
1. IFN-γ	(n = 103)	(n = 188)	(n = 363)
+874T/T	4	10	21.2	-	-	-
+874T/A	19	29	46.8	-	-	-
+874A/A	77	61	32.0	-	-	-
2. IL-10	*(n = 182)		(n = 726)	(n = 152)	(n = 660)	(n = 166)
-1082A	60		63	47.4	51	94
-1082G	40		37	52.6	49	6.0

*Combined African and mixed race control groups in this study (As there were no differences in the distribution of IL-10 alleles between the two South African ethnic populations, the data was combined to compare allele frequencies to other populations). Data reported by ^#Poli et al. (2002); ⁺Reynard et al. (2000); ^†Perrey et al. (1998); ^§Mok et al. (1998)