Table 1.

Different swinecoronaviruses, tropism, and their receptors.

Genus	Virus species	Tropism	Receptor/Co-receptor	References
Alpha	TGEV	Respiratory and gastrointestinal system	Aminopeptidase N (APN), Sialic acid	Turlewicz-Podbielska and Pomorska-Mól (2021)
	PRCV	Respiratory system	Aminopeptidase N (APN)	Peng et al. (2020)
	PEDV	Gastrointestinal system	N acetyl neuraminic acid	Liu et al. (2015)
	SADS- CoV	Gastrointestinal system	Not identified	Li et al. (2018b)
Beta	PHEV	Respiratory, gastrointestinal and nervous systems	5-N-acetyl-9-O acetyl neuraminic acid (Neu5, 9Ac2), Neural cell adhesion molecule (NCAM)	Dong et al. (2015); Alluwaimi et al. (2020)
Delta	PDCoV	Gastrointestinal system	Aminopeptidase N (APN)	Wang et al. (2018)