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.
PPDB-specific responses in naturally infected SICCT-negative/IFN-γ-positive reactor cattle (grouped into those with visible lesions [VL] and nonvisible lesions [NVL] at postmortem) and TB-free controls. Each spot represents a single animal. The 0.1-OD cutoff for optimal sensitivity/specificity (from ROC analysis of IL-2 data in Fig. 1) is shown.
