TABLE 1.

Antibodies used for analysis of BEFV isolates

Antibody	Designationa	Antigenic site	Isotype	Neutralization prototype strain (BB7721)
17B1	A	G1	IgG2a	+
13A3	B	G1	IgG3	+
15B5	C	G2	IgG1	+
12A5	D	G2	IgG2a	+
8B6	E	G3a	IgG2a	+
8D3	F	G3b	IgG2a	+
16A6	G	G3b	IgG2a	+
5A5	H	G4	IgG1	+
3A2	I	NDb	IgG2b	−
Polyclonal	J	NAc	ND	+
Culture fluid	K	NA	NA	−

^aAs depicted in Fig. 3.

^bND, not determined; nonneutralizing monoclonal antibody.

^cNA, not applicable.