Serological Evidence of SARS-CoV-2 Exposure in Domestic Dogs and Cats, Thailand: Detection of SARS-CoV-2 Omicron Variant in Dogs Living in COVID-19-Positive Households

Table 1

Detail of serum collected from dogs and cats and serological test for SARS-CoV-2 antibodies by ELISA and sVNT.

Month	Sample	Dog				Cat
		ELISA positive (suspected)/test	(%)	sVNT	(%)	ELISA positive (suspected)/test	(%)	sVNT	(%)
Jan-21	190	2(1)/103	1.94	0/3	0	1/87	1.15	0/1	0
Feb-21	165	3(1)/101	2.97	0/4	0	0/64	0	0	0
Mar-21	181	3/101	2.97	0/3	0	0/80	0	0	0
Apr-21	140	0/89	0	0/0	0	0/51	0	0	0
May-21	171	3/92	3.26	0/3	0	0/79	0	0	0
Jun-21	198	3/108	2.78	0/3	0	0/90	0	0	0
Jul-21	224	1/130	0.77	0/1	0	0/94	0	0	0
Aug-21	192	3(1)/116	2.59	0/4	0	1/76	1.32	1/1	1.32
Sep-21	96	1/49	2.04	0/1	0	2(2)/47	4.26	3/4	6.38
Oct-21	106	0(1)/55	0	0/1	0	2/51	3.92	1/2	1.96
Nov-21	100	0(1)/50	0	0/1	0	0/50	0	0/0	0
Dec-21	97	0/50	0	0/0	0	2/47	4.26	2/2	4.26
Jan-22	98	1/46	2.17	0/1	0	1(1)/52	1.92	1/2	1.92
Feb-22	102	1/48	2.08	0/1	0	2/54	3.70	2/2	3.70
Mar-22	101	4/55	7.27	1/4	1.82	1/46	2.17	1/1	2.17
Apr-22	104	3/54	5.56	1/3	1.85	1/50	2.00	1/1	2.00
May-22	94	3/49	6.12	0/3	0	5/45	11.11	4/5	8.89
Jun-22	96	1/47	2.13	0/1	0	0/49	0	0/0	0
Jul-22	104	1/51	1.96	0/1	0	1/53	1.89	1/1	1.89
Aug-22	105	0/52	0	0/0	0	3/53	5.66	2/3	3.77
Total	2,664	33(5)/1,446	2.28	2/38	0.14	22(3)/1,218	1.81	19/25	1.56