Table 2. WNV antibody response of hamsters after immunization with WNV killed virus vaccine (Fort Dodge) and challenge with the NY385-99 strain of WNV^a,b.

Animal no.	HI antibody titer	CF antibody titer	PRN antibody titerc
32 days after Ft. Dodge vaccine
H-8440	1:40	1:40	1:20
H-8441	0d	0	<1:10
H-8442	1:20	1:40	<1:10
H-8443	1:40	1:40	1:20
H-8445	1:40	1:40	1:20
H-8446	1:20	1:20	1:40
H-8447	1:20	1:20	<1:10
H-8448	1:20	1:20	<1:10
H-8449	1:40	1:20	1:10
6 days after challenge with WNV
H-8440	1:80	1:80	ND
H-8441	1:320	1:160	ND
H-8442	1:40	1:40	ND
H-8443	1:40	1:40	ND
H-8445	1:320	1:160	ND
H-8446	1:80	1:40	ND
H-8447	1:320	1:160	ND
H-8448	1:160	1:80	ND
H-8449	1:160	1:40	ND

^aWNV, West Nile virus; HI, hemagglutination inhibition; CF, complement fixation; PRN, plaque reduction neutralization; ND, not done.
^b10^4.0 50% tissue culture infective dose₅₀ given intraperitoneally.
^cHighest serum dilution producing >90% plaque inhibition.
^d0 = <1:20.