. 2023 Jan;87(1):41–50.

Table II.

Pathology data of 6 pigs in each of 10 groups at 21 d post-inoculation (dpi).

Groups	Microscopic lymphoid lzesion scores	Microscopic lung lesion scores	Number of PCV-2 antigen- positive cells
Single-infection
PCV-2a	1.50 ± 0.35^a	0.80 ± 0.30^a	16.67 ± 2.00^a
PCV-2b	1.50 ± 0.35^a	1.00 ± 0.15^a	18.44 ± 3.53^a
PCV-2d	1.70 ± 0.35^a	1.00 ± 0.30^a	17.89 ± 4.17^a
PCV-2e	1.20 ± 0.15^a	0.90 ± 0.20^a	12.39 ± 1.41^b
Negative control	0.00 ± 0.00^b	0.00 ± 0.00^b	0.00 ± 0.00^c
Dual-infection
PCV-2a/PRRSV	3.20 ± 0.45^a	2.60 ± 1.00^a,b	31.17 ± 3.42^a
PCV-2b/PRRSV	3.30 ± 0.35^a	2.90 ± 0.20^a	30.17 ± 7.43^a
PCV-2d/PRRSV	3.60 ± 0.15^b	3.30 ± 0.65^a	41.72 ± 5.20^b
PCV-2e/PRRSV	2.70 ± 0.20^a	2.60 ± 0.15^b	14.17 ± 4.04^c
PRRSV	1.00 ± 0.45^c	2.20 ± 0.45^b	0.00 ± 0.00^d
Negative control	0.00 ± 0.00^d	0.00 ± 0.00^c	0.00 ± 0.00^d

Different superscripts (a, b, c, and d) indicate significant (P < 0.05) difference among either single-infected or dual-infected groups. Microscopic lymphoid and lung lesion scores: median ± interquartile range (IQR) and number of PCV-2 antigen-positive cells: mean ± standard deviation (SD).