Comparative Serological Study for the Prevalence of Anti-MERS Coronavirus Antibodies in High- and Low-Risk Groups in Qatar

Table 5

Cross-reactivity of reactive samples with rS1-ELISA and other human coronaviruses.

	Sample identifier	Whole-virus IIFT IgG titer		rS1-ELISA titer IgG	rS1-IIFT titer IgG
		229E	SARS	HKU1	229E	OC43	SARS	NL63	HKU1
Reactive BD	BD 2014/597	≥320	0	≥100	320	320	0	3200	3200
	BD 2015/1303	320	0	≥101	3200	3200	0	3200	320
	BD 2015/3004	≥1000	0	≥101	320	3200	0	3200	3200
	BD 2015/3119	≥320	0	≥101	320	320	0	320	320
	BD 2015/3380	320	0	≥101	3200	3200	0	320	320
	BD 2015/3513	≥1000	0	≥101	3200	3200	0	3200	3200
	BD 2015/4435	≥320	0	≥101	320	3200	0	3200	3200
Borderline BD	BD 2012/2644	≥1000	0	≥101	320	320	0	320	320
	BD 2015/1816	≥320	0	≥101	3200	3200	0	3200	3200
	BD 2015/4708	ND	ND	≥101	3200	3200	0	320	3200
Selected negative BD (showing 3/13)	BD 2015/2859	ND	ND	ND	3200	3200	0	3200	3200
	BD 2015/2988	ND	ND	ND	320	320	0	0	320
	BD 2015/3379	320 (IgM = 0)	0 (IgM = 0)	≥101	3200	3200	0	320	320
Reactive CP	CP Mar.2015	100	0	≥101	3200	320	320	320	320
	CP May.2015	1000	0	≥101	3200	3200	0	320	3200
	CP Feb.2016	0	1000	≥101	3200	>10000	3200	0	0

Positive samples are shown in italic. ND: not determined.