Volume 20, Number 4—April 2014
Antibodies against MERS Coronavirus in Dromedary Camels, United Arab Emirates, 2003 and 2013
|Serum no.||rIFA titer†‡
||Protein array (RFU) ‡§
||Neutralization test titer¶#
*rIFA, recombinant immunofluorescence assay (antigen used was complete spike protein); RFU, relative fluorescence units; vIFA, Middle East respiratory syndrome coronavirus–based immunofluorescence assay (antigen used complete virus); MERS-S, spike protein from Middle East respiratory syndrome coronavirus; OC43-S, spike protein from human coronavirus OC34; SARS-S, spike protein from severe acute respiratory syndrome virus; MERS-CoV, Middle East respiratory syndrome coronavirus; BCoV, bovine coronavirus; –, negative.
†Serum dilutions started at 1:20.
‡Assay was used for screening purposes.
§RFU <4,000 were considered negative. The serum dilution used in this assay was 1:20 (antigen used was S1 subunit of spike protein).
¶Serum dilutions started at 1:40.
#Assay applied for confirmation purposes.