Table 1.

The origin and location of 735 non-O157 STEC isolates used in this study.

Source	Location	Year	No. of isolates	No. of eae-positive (%)
Cattle	Shandong, Sichuan, Heilongjiang	2009, 2012, 2015, 2017	154	41 (26.6)
Goat	Henan, Sichuan, Shandong	2009, 2017	156	0 (0)
Pig	Chongqing, Beijing, Guizhou, Shandong, Heilongjiang	2011, 2012, 2013, 2015	135	0 (0)
Yak	Qinghai	2012	128	2 (1.6)
Plateau Pika	Qinghai	2012, 2012, 2015	22	0 (0)
Marmot	Qinghai	2012, 2013	8	0 (0)
Tibetan antelope	Qinghai	2014	5	0 (0)
Raw meats	Beijing, Sichuan	2013, 2014	60	4 (6.7)
Diarrheal patient	Henan, Shenzhen, Shanghai, Sichuan, Beijing	2010, 2012, 2013, 2014, 2016, 2018	31	9 (29.0)
Healthy carrier	Qinghai, Shenzhen	2013, 2014	4	0 (0)
Water	Shandong	2017	1	0 (0)
Unknown	Heilongjiang, Guangxi, others	2014	31	14 (45.2)
Total			735	70 (9.5)