TABLE 5.

Microscopic liver lesions in control, oronasal, and i.v. group chickens^a

Group	No. of chickens with lesions (mean score) at indicated dpi
	1	3	5	7	10	13	16	20	24	28	35	42	56
Control	2 (1.5)	2 (3.5)	2 (1.5)	1 (1.5)	1 (1.0)	1 (3.0)b	2 (2.0)	1 (1.0)	2 (1.5)	1 (0.5)	1 (1.0)	2 (2.0)	4 (2.25)
Oronasal	2 (2.5)	2 (3.0)	2 (3.0)	2 (3.0)	2 (2.5)	2 (3.0)	2 (3.0)	2 (3.0)	2 (2.5)	2 (3.0)	2 (2.0)	2 (2.5)	4 (1.5)
i.v.	2 (2.5)	2 (2.5)	2 (2.5)	2 (2.0)	2 (4.0)	2 (3.0)	2 (3.5)	2 (2.5)	1 (2.0)b	2 (1.5)	2 (2.5)	2 (2.5)	5 (2.2)

^aTwo chickens were necropsied on each dpi from 1 to 42 dpi, and the remaining chickens (five, four, and four chickens from the i.v., oronasal, and control groups, respectively) were necropsied at 56 dpi. No chickens were necropsied at 49 dpi. The liver lesions included lymphoplasmacytic periphlebitis, phlebitis, and necrotic lesions.

^bOnly one chicken sample was available.