Table 1.

A list of ssDNA viruses prevalent in pigs

Family	Genus	Species	Nucleotide substitutions per site per year	Typical prevalence	Pathogenicity in pigs	Vaccine in pigs	Detection in human cell lines or clinical samples
Anelloviriade	Iotatorquevirus	TTSuV 1a	10−4 a	60%126	Inconclusive	No	Human PBMCs49, 50
		TTSuV 1b			Inconclusive	No
	Kappatorquevirus	TTSuV k2a		77%126	Inconclusive	No	No information
		TTSuV k2b			Inconclusive	No	No information
Parvoviridae	Ungulate protoparvovirus 1	PPV1	10−4	67%72	Pathogenic	Available	Does not infect cell lines or exposed humans74, 76
	Ungulate tetraparvovirus 2	PPV3	Unknown	39%72	Inconclusive	No	No information
	Ungulate tetraparvovirus 3	PPV2	Unknown	58%72	Inconclusive	No	No information
	Ungulate copiparvovirus 2	PPV4	Unknown	33%72	Inconclusive	No	No information
		PPV5	Unknown	3%71	Inconclusive	No	No information
		PPV6	Unknown	6.1%73	Inconclusive	No	No information
	Ungulate bocaparvovirus 2	PBoV1	Unknown	29%127	Inconclusive	No	No information
		PBoV2	Unknown	7%127	Inconclusive	No	No information
		PBoV6	Unknown	16%128	Inconclusive	No	No information
	Ungulate bocaparvovirus 3	PBoV5	Unknown	16%128	Inconclusive	No	Acute respiratory tract infection in a child129
	Ungulate bocaparvovirus 4	PBoV7	Unknown	55%72	Inconclusive	No	No information
	Ungulate bocaparvovirus 5	PBoV3	Unknown	9%127	Inconclusive	No	No information
		PBoV4‐1	Unknown	22%127	Inconclusive	No	No information
		PBoV4‐2	Unknown	31%127	Inconclusive	No	No information
Circoviridae	Circovirus	PCV1	10−5	2.4%94	Not pathogenic	No	HEK 293 cells, HeLa cells, Chang liver cells, Huh‐7 cells102, 104Exposed children did not develop antibodies103
		PCV2	10−3	82%94	Pathogenic	Available	Rd cells102
		PCV3	Unknown	34.4%92	Inconclusive	No	No information

TTSuV, Torque teno sus virus; PPV, porcine parvovirus; PBoV, porcine bocavirus; PCV, porcine circovirus; PBMC, peripheral blood monocytes.

^aEstimate from Anelloviridae infecting plants.