Table 1.

IgM and IgG reactivity to NRA and SMB antigen in a panel of coded human serum specimensa

Specimen no. (day postonset)ELISA titerNt antibody titer
IgMIgG
NRASMBNRASMB
NY99 virusEg-101 virusSLE virusNY99 virusEg-101 virusSLE virus
Positive control4.194.465.164.545.004.82ND
1 (20)7.427.156.593.747.226.305.127.931:1,280
2 (14)4.263.124.341.141.141.311.401.8ND
3 (16)6.005.396.182.081.611.851.952.53<1:10
4 (30)3.042.232.471.218.487.836.34ND1:160
5 (68)5.015.856.281.441.101.141.191.02ND
6 (?)7.304.113.511.118.578.847.7611.541:320
7 (43)1.901.762.690.797.827.666.403.61ND
8 (20)1.120.980.950.911.531.641.70NDND
9 (3)1.531.372.171.136.887.126.07ND1:5120
10 (3)6.434.696.041.873.944.234.382.31<1:10
11 (7)6.714.595.781.863.744.303.482.741:20
12 (10)1.141.061.170.966.306.595.117.28ND
13 (?)1.130.901.131.331.201.381.41NDND
14 (6)7.436.648.031.717.907.055.444.691:80
15 (3)7.446.988.322.892.963.042.432.441:160
16 (13)2.882.304.171.011.071.371.471.80<1:10
17 (4)1.200.850.901.070.941.341.341.49ND
18 (8)1.090.971.01ND0.670.770.75NDND
19 (73)1.040.960.95ND0.710.800.79NDND
20 (8)1.101.141.01ND0.720.820.82NDND
21 (0)1.060.920.880.910.790.881.110.90ND
Total no. positive111113101010
  • a SLE virus MAC and IgG ELISAs were conducted as a separate test. Nt antibody titer was assayed in a 90% plaque reduction neutralization test against WN virus. ND, not done.