Volume 21, Number 8—August 2015
Occupational Exposure to Dromedaries and Risk for MERS-CoV Infection, Qatar, 2013–2014
|Exposure type, cohort||Country||Serum samples tested by
|S1 assay, no. positive/no. tested||PRNT90, no. positive/no. tested†
|A, slaughterhouse workers|
|A1, camel slaughterers||Qatar||4/5||2/4 (40, 20)||NT|
|A2, sheep slaughterers (contact with camels/camel slaughterers)||Qatar||3/104||2/3 (20, 20)||1/16 (20)|
|B, central animal market workers||Qatar||1/8||0||NT|
|C, barn workers at international camel racing track||Qatar||4/22||3/4 (40, 40, 20)||NT|
|D, camel farm workers
||3/8 (40, 40, 20)
|No dromedary contact||0/204||NA||0/48|
|E, construction workers||Qatar||0/56||NA||0/48|
|F, sheep farmers||Qatar||0/10||NA||NT|
|G, specificity controls|
|G1, recent infection with a common hCoV||GER, NL||0/66||NA||NT|
|G2, suspected infection with Bordetella pertussis||NL||0/72||NA||NT|
*GER, Germany; hCoV, human coronavirus; MERS-CoV, Middle East respiratory syndrome coronavirus; NA, not applicable; NL, the Netherlands; NT, not tested; PRNT90, 90% plaque-reduction neutralization test; S1, MERS-CoV S1 antigen.
†Nos. in parentheses are reciprocal antibody titers in PRNT90.
1These first authors contributed equally to this article.