Table 1 Neutralizing antibody titers in sheep following vaccination and challenge assessed by plaque reduction neutralization assay (PRNT80).

From: A Recombinant Rift Valley Fever Virus Glycoprotein Subunit Vaccine Confers Full Protection against Rift Valley Fever Challenge in Sheep

Sheep ID

Group

PRNT80 Postvaccination titer

PRNT80 Postchallenge titer

0 dpv

7 dpv

14 dpv

21 dpv

28 dpv

0 dpc

7 dpc

62

Vac

–

–

80

40

1280

>1280

1280

64*

Vac

–

20

40

80

>1280

N/A

N/A

66

Vac

–

20

40

80

1280

1280

1280

67

Vac

–

–

10

80

1280

>1280

1280

70

Vac

–

–

20

40

1280

1280

1280

Mean

Ā 

N/A

20a

38

64

1280

1280

1280

63

Mock

–

–

–

–

–

–

N/A

65

Mock

–

–

–

–

–

–

80

68

Mock

–

–

–

–

–

–

160

69

Mock

–

–

–

–

–

–

N/A

71

Mock

–

–

–

–

–

–

80

Mean

Ā 

N/A

N/A

N/A

N/A

N/A

N/A

133b

  1. Key: dpv = days postvaccination; dpc = days postchallenge; an = 2; bn = 3; N/A = not applicable; *sheep #64 was sacrificed due to leg injury; (–) = no titer.