Table 1.

The transmission of BCoV.

Sample Source	Time Sequence	Continent	Country	Positive Rate	References
Intestinal tract	Before 2000	America	USA	16.4–84%	[21,22]
			Canada	6.5–70%	[9,19,23]
			Argentina	2.41–10.52%	[20,46]
		Europe	Britain	14%	[24]
			Belgium	8%	[25]
		Asia	Japan	14.5–62.5%	[10,26]
	2000–2009	America	Brazil	14.91–68.6%	[35,36]
			Uruguay	1.5–11.8%	[47]
		Europe	Netherlands	2.8%	[7]
			Italy	46.74%	[33]
		Asia	Korea	5.6–58.2%	[27,30,31,32]
			Turkey	10.8–28.1%	[28,29]
	2010–2019	Oceania	Australia	21.6%	[39]
			New Zealand	14%	[38]
		Africa	Algeria	20.73%	[40]
			Ghana	0.3%	[8]
		Asia	Iran	7.2%	[41]
			China	12.20–69.05%	[11,45]
			Thailand	12%	[42]
			India	8.88–16%	[43]
			Vietnam	6.9%	[44]
Respiratory tract	Before 2000	America	USA	8.1–96%	[6,48]
			Canada	57.89–66.67%	[23,49]
	2000–2009	Europe	Italy	9.6–65.85%	[50]
	2010–2019	America	Brazil	22–67%	[35,37]
		Europe	Ireland	22.9–60.7%	[51]
			France	17–70.1%	[52,53]
		Asia	Japan	21.2%	[54]
			Turkey	1%	[28]
		Oceania	Australia	13–33.33%	[55]
	After 2020	Asia	China	21.53%	[45]
Serum antibody		America	USA	11–91%	[22]
			Canada	7–100%	[56,57]
		Europe	Sweden	23.8–100.0%	[58]
			Norway	16–72.2%	[59,60,61]
			France	16.5%	[62]
			Belgium	30%	[63]
		Africa	Ghana	55.8%	[8]