Pulmonary

Inflammation and fibrosis of the bronchial epithelia;

Loss of epithelial cilia;

Thickening of the lung parenchyma;

Presence of thick mucus and lesions in the bronchial sacs.

(Tarwid et al. 1985; Blagburn et al. 1987)

Gastric

Non-specific lesions and oedema;

Hyperplasia of the epithelial cells;

Inflammation of the lamina propria.

(Rivasi et al. 1999; Taylor et al. 1999; Masuno et al. 2006)

Intestinal

Loss of mature enterocytes;

Villius atrophy;

Lengthening of crypts (hyperplasia);

Oedema;

Loss of membrane-bound digestive enzymes;

Diminished absorptive surface of the intestine.

(Inman and Takeuchi, 1979; Tzipori et al. 1981; Pearson and Logan 1983)

Pancreatic

Dilation of the pancreatic duct;

Formation of hyperplasic lesions;

Thickening of the epithelium.

(Cappell and Hassan 1993)