Scoring System for Lesions Induced by Different Strains of Newcastle Disease Virus in Chicken

Table 3

Lesions scoring (0-3) induced by vNDV in HE stained caecal tonsil, brain, liver, and lung tissues on days 3, 6, and 7 pi.

	Caecal Tonsil	Brain	Liver	Lung
Day 3 pi	3.00 ± 0.00 (3)	0.00 ± 0.00 (3)	0.73 ± 0.07 (3)	0.87± 0.07 (3)
Day 6^∗ pi (one mortality case)	3.00 (1)	0.20 (1)	1.60 (1)	2.20 (1)
Day 7 pi	3.00 ± 0.00 (2)	1.30 ± 0.10 (2)	1.70 ± 0.10 (2)	2.60 ± 0.00 (2)

Note. Scoring was expressed as mean ± SE. Values in brackets indicate the number of chickens. ^∗One chicken died on day 6 pi. Tissues collected from the control group scored 0.