Alignment of subtype H7 AIV. Subtype H7 AIV from California were aligned with the published sequences (GenBank) to which they were most closely related and compared to primer and probe sequences. Conserved nucleotides in the aligned sequences are represented by dots, while nonidentical bases are bold. The California viruses described in this paper are boxed. GenBank accession numbers for the other sequences are as follows: A/mallard/Delaware/418/2005(H7N3), CY021637.1; A/environment/Maryland/566/2006(H7N9), CY024818.1; A/environment/Maryland/261/2006(H7N3), CY022749.1; A/environment/Maryland/267/2006(H7N3), CY022757.1; A/blue-winged teal/Ohio/658/2004(H7N3), CY018901.1; A/mallard/Alberta/34/2001(H7N1), CY005983.1; A/mallard/Alberta/24/01(H7N3), DQ017504.1; A/blue-winged teal/ALB/295/1977(H7N3), CY005974; A/wigeon/ALB/284/1977(H7N3), CY005975.1; A/mallard duck/ALB/279/1977(H7N3), CY005976.1; A/rhea/North Carolina/39482/1993(H7N1), EF470586.1; A/mallard/Ohio/421/1987(H7N8), CY021621.1; A/chicken/British Columbia/04(H7N3), AY611524.1; A/chicken/BC/GSC_human_B/04(H7N3), AY646078.1; A/Canada/rv504/2004(H7N3), CY15006.1; A/GSC_ chicken/BC/04(H7N3), AY650270.1; A/chicken/BC/CN-7/04(H7N3), EF470587.1; A/pheasant/Minnesota/917/1980(H7N3), CY014721.1; A/turkey/Minnesota/1200/1980(H7N3), CY014778.1; A/turkey/Minnesota/1/1988(H7N9), CY014786.1; A/quail/PA/20304/97(H7N2), AY240924; A/green-winged teal/ALB/228/1985(H7N3), CY005978; A/Chicken/New York/13142-5/94(H7N2), AF072384.2; A/Turkey/New York/4450-5/94(H7N2), AF072386.2.