Table 1. Distribution of rotavirus G types from children, adults, and elderly patients with acute diarrhea in São Paulo, Brazil, 1996–2003.

Year	No. rotavirus isolates	No. (%) selected for genotyping	G1	G2	G3	G4	G9	Mixed*	Not typeable
1996	33	21 (63.3)	19 (90.5)	2 (9.5)	0	0	0	0	0
1997	121	48 (39.7)	45 (93.8)	0	0	3 (6.3)	0	0	1 (2.1)
1998	45	16 (35.6)	12 (75.0)	0	0	4 (25.0)	0	0	0
1999	99	56 (56.6)	46 (82.1)	0	0	10 (17.9)	0	0	2 (3.6)
2000	98	52 (53.1)	42 (80.8)	0	0	0	7 (13.4)	3 (5.8)	5 (9.6)
2001	57	46 (80.7)	28 (60.9)	2 (4.3)	1 (2.2)	6 (13.0)	4 (8.7)	1 (2.2)	1 (2.2)
2002	90	49 (54.4)	18 (36.7)	0	2 (4.1)	4 (8.2)	23 (46.9)	2 (4.1)	6 (12.2)
2003	231	127 (55.0)	84 (66.1)	1 (0.8)	0	0	40 (31.5)	2 (1.6)	5 (3.9)
Total	774	431 (55.7)	294 (68.2)	5 (1.2)	3 (0.7)	27 (6.3)	74 (17.2)	8 (1.8)	20 (4.6)

*Mixed infections: 2000, G1+G9 (n = 3); 2001, G2+G3 (n = 1); 2002, G1+G9 (n = 1) and G4+G9 (n = 1); 2003, G1+G9 (n = 2).