Biosafety steps in the manufacturing process of spray-dried plasma: a review with emphasis on the use of ultraviolet irradiation as a redundant biosafety procedure

Table 2 Studies that demonstrated lack of transmission of different swine viruses when PCR genome copies were present in SDP

Virus	PCR genome copies	SDP inclusion level in feed	Feeding duration	Results	Reference
PCV-2	2.47 × 10^5.0	8%	45 days	Not infective	[36]
PCV-2	10^6.7	4%	42 days	Not infective	[37]
PCV-2	7.56 × 10^5.0	8%	32 days	Not infective	[38]
HEV	Positive	8%	28 days	Not infective	[39]
PEDV	Positive (Ct: 30.1)	5%	14 days	Not infective	[40]
PEDV	Positive	3–8%	7 to 14 days	Not infective	[41]
PRRSV	Positive	3–8%	7 to 21 days	Not infective	[42]

ISSN: 2055-5660