Table 1. Comparative data base of ELISA and proposed SPR biosensor in low, mid and high positive patient samples of dengue virus.

		ELISA results			Biosensor results (ΔθSPR)
Type of sample (HI)	Patient serum	P/N ratio	NS1	IgM	S.T. 1	S.T. 2	S.T. 3	S.T. 4
Low positive (Antibody titre 10–160)	AH01	2.48	−	+	1.0110	0.7454	0.5808	0.5923
	AH02	2.67	−	+	1.0570	0.7186	0.5845	0.6344
	AH03	2.59	+	+	1.0688	0.7211	0.5785	0.6369
	AH04	2.47	+	+	1.0013	0.6498	0.5499	0.5957
	AH05	2.81	+	+	1.0102	0.6694	0.5162	0.5572
	AH06	2.47	+	+	1.0060	0.6560	0.5080	0.5467
	AH07	2.79	+	+	0.9665	0.6910	0.5548	0.6105
	AH08	2.14	+	+	1.0019	0.7015	0.5002	0.5844
	AH09	2.93	−	+	1.1015	0.7528	0.5775	0.6512
	AH10	2.58	−	+	1.0104	0.7501	0.5771	0.6081
Mid positive (Antibody titre 160–640)	AH11	3.01	+	+	0.9983	0.8863	0.6866	0.7051
	AH12	3.93	+	+	1.0574	0.9095	0.5849	0.8077
	AH13	3.45	−	+	1.1691	0.7965	0.5987	0.7498
	AH14	3.75	+	+	0.9862	0.9380	0.6720	0.7899
	AH15	3.34	−	+	1.1001	0.8754	0.6972	0.7386
	AH16	4.59	−	+	1.1124	0.9566	0.7399	0.8211
	AH17	4.5	+	+	1.1092	0.9487	0.7410	0.8222
	AH18	4.96	+	+	1.1978	0.9637	0.7405	0.8230
	AH19	4.34	−	+	1.0543	0.7688	0.7337	0.6968
	AH20	4.63	+	+	1.1733	0.9598	0.7234	0.8176
High positive (Antibody titre 1280–10240)	AH21	5.25	+	+	1.1255	1.0114	0.7154	0.9045
	AH22	5.69	+	+	1.1469	0.9778	0.7740	0.8304
	AH23	5.12	+	+	1.1344	0.9463	0.7595	0.7983
	AH24	5.6	+	+	1.1226	0.9462	0.7519	0.8084
	AH25	6.53	−	+	1.1215	0.9084	0.7585	0.7845
	AH26	7.13	−	+	1.1987	1.0695	0.7021	0.8793
	AH27	7.32	+	+	1.2731	1.1128	0.8676	0.9519
	AH28	6.06	+	+	1.1996	0.9954	0.7567	0.8922
	AH29	7.02	−	+	1.2453	1.0532	0.8063	0.9476
	AH30	7.38	−	+	1.2782	0.9869	0.7631	0.8541