Synthetic peptide-based immunoassays for distinguishing between human T-cell lymphotropic virus type I and type II infections in seropositive individuals.
Until now, serologic tests that distinguish the closely related human T-cell lymphotropic virus types I (HTLV-I) and II (HTLV-II) infections have not been available. Synthetic peptide assays, employing peptides derived from the core and envelope proteins of HTLV-I and HTLV-II (SynthEIA and Select-HTLV tests), were evaluated for the ability to serologically discriminate HTLV-I and HTLV-II infections. Of 32 HTLV-I- and 57 HTLV-II-positive serum specimens from individuals whose infections were confirmed by polymerase chain reaction, the SynthEIA test categorized 29 (91%) as HTLV-I and 50 (88%) as HTLV-II, and 10 (11%) were nontypeable. In contrast, the Select-HTLV test categorized 32 (100%) as HTLV-I and 55 (96%) as HTLV-II, and 2 (2%) were nontypeable. The specificity of both the assays in seropositive serum specimens was 100% in that none of the specimens were incorrectly classified. Additional serum specimens obtained from clinically diseased patients from the United States (n = 8) and asymptomatic carriers and patients from Japan (an endemic population for HTLV-I; n = 40) were categorized as HTLV-I by at least one of the assays, while serum specimens from Guaymi Indians from Panama (an endemic population for HTLV-II; n = 13) were categorized as HTLV-II. Thus, peptide enzyme immunoassays appear to represent a simple technique employing chemically synthesized antigens for discrimination between antibodies of HTLV-I and HTLV-II.
Retrovirus Diseases Branch, Centers for Disease Control, Atlanta, Georgia 30333.
R B
RB
Lal
W
W
Heneine
D L
DL
Rudolph
W B
WB
Present
D
D
Hofhienz
T M
TM
Hartley
R F
RF
Khabbaz
J E
JE
Kaplan
D000914:Antibodies, Viral / Q000097:blood; D004279:DNA, Viral / Q000235:genetics; D005069:Evaluation Studies as Topic; D005260:Female; D015490:HTLV-I Infections / Q000175:diagnosis* / Q000276:immunology; D015491:HTLV-II Infections / Q000175:diagnosis* / Q000276:immunology; D015368:Human T-lymphotropic virus 1 / Q000235:genetics / Q000276:immunology; D015367:Human T-lymphotropic virus 2 / Q000235:genetics / Q000276:immunology; D006801:Humans; D007118:Immunoassay / Q000379:methods*; D008297:Male; D008969:Molecular Sequence Data; D010455:Peptides / Q000276:immunology; D014764:Viral Proteins / Q000032:analysis / Q000276:immunology*
D000914:Antibodies, Viral; D004279:DNA, Viral; D010455:Peptides; D014764:Viral Proteins