Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Serum titers of PRRSV, expressed as the logarithm of the median tissue culture infective dose (TCID50), in the same 3 groups of pigs. The asterisks indicate that the group mean titers were significantly different (P ≤ 0.05) only on days 18 and 22 PI.
