Comparison of serum pools and oral fluid samples for detection of porcine circovirus type 2 by quantitative real-time PCR in finisher pigs

Table 3 Summary statistics of PCV2 viral loads and estimated Spearman’s correlation coefficients (ρ) between oral fluid and serum pools from two finishing herds

PCV2 viral load	Sampling no.	Sample type	Mean	Median	Standard deviation	Min	Max	Wilcoxon (p-value)^c	Spearman’s correlation
									ρ	p-value^c
Herd 1	1	Serum^a	4.82	5.86	2.47	0	6.97	<0.001	0.69	<0.001
(n = 50)		OF^b	6.92	8.13	2.92	0	8.99
Herd 2	1	Serum	3.89	4.99	2.96	0	8.29	<0.001	0.39	0.001
(n = 65)		OF	7.09	7.37	1.07	4.1	8.89
	2	Serum	6.43	6.51	0.86	3.96	8.76	<0.001	0.14	0.278
		OF	7.98	8.03	0.73	4.80	9.26
	3	Serum	5.69	5.79	0.96	0	7.43	<0.001	0.04	0.725
		OF	6.97	7.03	0.51	5.56	8.13
	4	Serum	5.09	5.19	0.56	3.74	7.28	<0.001	0.08	0.524
		OF	6.37	6.37	0.51	4.67	7.43

^aSerum = serum pool, ^bOF = oral fluid, ^csignificance level is 0.005 due to Bonferroni correction

ISSN: 2055-5660