Double-antigen sandwich ELISA for detection of antibodies to SARS-associated coronavirus in human serum.
The study presented here was conducted to evaluate the performance of a double-antigen sandwich ELISA to detect antibodies in human serum against the coronavirus associated with severe acute respiratory syndrome (SARS). A recombinant partial nucleocapsid protein of SARS-associated coronavirus was used as a serodiagnostic antigen in the ELISA. A total of 2892 clinical serum samples were tested with the ELISA kit, which positively identified 25 of 35 (71.4%) samples of patients with confirmed SARS infection, 286 of 407 (70%) samples of patients suspected of having SARS, 229 of 302 (75.8%) samples of convalescent SARS patients, and 0 of 544 samples obtained from healthcare workers; only 1 of 1604 clinical samples obtained from patients with other diseases demonstrated a weakly positive result. These results indicate that the double-antigen sandwich ELISA is an effective screening method for the serodiagnosis of SARS-associated coronavirus.
Chen
S
S
Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing, 100850, People's Republic of China.
Lu
D
D
Zhang
M
M
Che
J
J
Yin
Z
Z
Zhang
S
S
Zhang
W
W
Bo
X
X
Ding
Y
Y
Wang
S
S
D000914:Antibodies, Viral / Q000097:blood*; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D019590:Nucleocapsid Proteins / Q000276:immunology*; D011994:Recombinant Proteins / Q000032:analysis / Q000276:immunology; D045473:Severe acute respiratory syndrome-related coronavirus / Q000235:genetics / Q000276:immunology / Q000302:isolation & purification*; D045169:Severe Acute Respiratory Syndrome / Q000175:diagnosis* / Q000453:epidemiology / Q000276:immunology
D000914:Antibodies, Viral; D019590:Nucleocapsid Proteins; D011994:Recombinant Proteins