Table 1. List of primer pairs for detection of each target used in this study.

Target specificity	Primer names	Nucleotide sequences	References
EcPV1 L1	EPV-F	5′-TGCGTTCGCCCCAATAGTCATCTT-3′	[17]
	EPV-R	5′-ACCGCCCGCCTCACCCTTGTC-3′
EcPV2 L1	EcPV2 f	5′-CAGACTTGTCTGGGCTCTCC-3′	[11]
	EcPV2 r	5′-TCCCGCCTAGCATAGAAGAA-3′
EcPV3 L1	EcPV3-For	5′-CGTTAAGCGGCCTTCCCCCTC-3′	[6]
	EcPV3-Rev	5′-GCTTTAGCACGCAAGCCCGC-3′
EcPV4 L1	EcPV4-For	5′-AGCTGACGTCCCATTAGACTTGGT-3′	[6]
	EcPV4-Rev	5′-GCAGGTGCGCCACTGTCTCA-3′
consensus EcPV L1	EcPVF	5′-CCDGCHHTBGGNGAGTAYTGG-3′	[3]
	EcPVR	5′-TGCCAGCANARNCCATTGTT-3′
animal and human PV L1	FAP59	5′-TAACWGTIGGICAYCCWTATT-3′	[5]
	FAP64	5′-CCWATATCWVHCATITCICCATC-3′
equine β-actin	β-actin For	5′-CATTGTCCACCTTCCAGCAGATGT-3′	[6]
	β-actin Rev	5′-CTAGAAGCATTTGCGGTGGACGAT-3′

EcPV: Equus caballus papillomavirus 2. For, forward; Rev, reverse.