TY - JOUR
T1 - Persistence in humans of antibody to subtypes of Venezuelan equine encephalomyelitis (VEE) virus after immunization with attentuated (TC 83) VEE virus vaccine
AU - Burke, D. S.
AU - Ramsburg, H. H.
AU - Edelman, R.
PY - 1977/1/1
Y1 - 1977/1/1
N2 - The authors studied the persistence of antibody to Venezuelan equine encephalomyelitis (VEE) virus subtypes in sera of 20 volunteers inoculated seven or nine years previously with attenuated TC-83 VEE virus vaccine. Serological patterns were compared with those of 10 other persons from whom samples of serum were obtained 28 days after vaccination with TC-83 virus. Vaccinees had no other known exposure to a group A arbovirus. Titers of neutralizing antibody of ≥1:10 were measured against the homologous TC-83 strain of virus in all long- and short-term vaccinees. In both groups of vaccinees the percentage of antibody-positive persons and their geometric mean titers of antibody to the epizootic subtypes I-A, I-B, and I-C were higher than titers to the enzootic subtypes I-D, I-E, II, III, and IV. However, proportionally fewer long-term vaccinees than short-term vaccinees had detectable neutralizing antibody reactive with enzootic strains. These results reveal long-lasting circulation of neutralizing antibody to TC-83 virus and closely related epizootic variants in 95%-100% of vaccinees. The relatively lower rate of antibody conversion and the loss of antibody to more antigenically remote enzootic subtypes of VEE virus suggest that vaccinees may be less well protected against infection by these strains.
AB - The authors studied the persistence of antibody to Venezuelan equine encephalomyelitis (VEE) virus subtypes in sera of 20 volunteers inoculated seven or nine years previously with attenuated TC-83 VEE virus vaccine. Serological patterns were compared with those of 10 other persons from whom samples of serum were obtained 28 days after vaccination with TC-83 virus. Vaccinees had no other known exposure to a group A arbovirus. Titers of neutralizing antibody of ≥1:10 were measured against the homologous TC-83 strain of virus in all long- and short-term vaccinees. In both groups of vaccinees the percentage of antibody-positive persons and their geometric mean titers of antibody to the epizootic subtypes I-A, I-B, and I-C were higher than titers to the enzootic subtypes I-D, I-E, II, III, and IV. However, proportionally fewer long-term vaccinees than short-term vaccinees had detectable neutralizing antibody reactive with enzootic strains. These results reveal long-lasting circulation of neutralizing antibody to TC-83 virus and closely related epizootic variants in 95%-100% of vaccinees. The relatively lower rate of antibody conversion and the loss of antibody to more antigenically remote enzootic subtypes of VEE virus suggest that vaccinees may be less well protected against infection by these strains.
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U2 - 10.1093/infdis/136.3.354
DO - 10.1093/infdis/136.3.354
M3 - Article
C2 - 903673
AN - SCOPUS:0017694027
SN - 0022-1899
VL - 136
SP - 354
EP - 359
JO - Journal of Infectious Diseases
JF - Journal of Infectious Diseases
IS - 3
ER -