Fresh tissues / materials
a. Most important
i. Feces from the small colon placed in a red top tube.
ii. Ligated loop of ileum placed into a whirl pack or equivalent bag.
b. Less important
i. Liver, spleen, lung, kidney and mesenteric lymph node placed together in a whirl pack or equivalent bag.
a. Gastrointestinal track (all segments opened lengthwise prior to immersion in formalin).
i. Rumen, reticulum, omasum, abomasums, duodenum, jejunum (several pieces from different areas – pick the most red areas), ileum (most important of all), cecum and spiral colon.
b. Other tissues (no sample more than ¼ inch thick).
i. Most important – lung, heart, liver and kidney.
ii. Less important – thyroid, adrenal gland, mesenteric lymph node, urinary bladder, adrenal gland and portions of the brain.