Table 2.

Scores of each disease parameter from Studies A, B and C.

Parameter	Study A	Study B	Study C
Disease severity	+++	+	+
Number of affected tissues	+++	+	++
Degree of tissue tropism a	+++	+	++
Peak viremia titer	+++	+	++
Onset of anti-PCV3 antibody b	+++	−/+	+

Study A [18]; Study B [17]; Study C [19]; Score, ranged from + = lowest value, to +++ = highest value among the three studies. ^a Tropism was determined by immunohistochemistry targeting PCV3 antigen (Study A) or in situ ybridization targeting PCV3 ORF1 mRNA (Study B and C). ^b + = shortest duration, +++ = longest duration.