Hypothalamus-pituitary-adrenal axis involves in anti-viral ability through regulation of immune response in piglets infected by highly pathogenic porcine reproductive and respiratory syndrome virus

Table 1 Detection of viremia and amounts of virus at different DPIs

DPI	Group A		Group B		Group C
DPI	Viremia^a	PRRSV amount^b	Viremia	PRRSV amount	Viremia	PRRSV amount
0	0/5	0	0/5	0	5/5	0
3	5/5	10^{5.69 ± 0.2}	5/5	10^{5.13 ± 0.2}	5/5	10^{5.14 ± 0.1}
6	5/5	10^{7.65 ± 0.2}	2/2^d	10^{9.86 ± 0.4}	5/5	10^{6.64 ± 0.4}
10	3/3^c	10^{8.8 ± 0.3}	–	–	4/4^e	10^{7.31 ± 0.3}

^aViremia was detected by TaqMan fluorescent quantitative PCR (Liu al., 2010);
^b Each number represents the average amount of virus (copies/mL) generated from the blood of all PRRSV-positive piglets at each DPI;
^c Two piglets died from HP-PRRS at 10 DPI;
^d One piglet died from HP-PRRS at 4 DPI and two piglets died from PRRS at 5 DPI;
^eOne piglet died from HP-PRRS at 9 DPI

ISSN: 1746-6148