TABLE 1.

Comparison of HCV subtypes determined by NS-4 IBA and nucleotide sequencing^a

Subtype by nucleotide sequencing	No. of isolates of the following subtype by serotyping:
	1a	1b	2a	2b	3a	4a
1a	37	4
1b	2	63				1
2a			5
2b				5
3a					9
4a						9

^aOf 135 isolates, 128 (95%) had identical results by both methods.