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.
Crop biopsies of about 12 × 8 mm should be collected along a prominent blood vessel. Following fixation in formalin, the biopsy should be carefully sliced perpendicular to its long axis. At least 5 thin slices should be prepared and placed on edge in a histologic cassette. An additional small piece should be frozen (fresh, without fixation) for potential RT-PCR testing.
