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

Table 6

Lesion scoring (0-5) induced by vNDV in HE stained tissues of the trachea, bursa of Fabricius, spleen, and kidney collected from hr 2 pi till day 5 pi.

	Hr 2 pi	Hr 4 pi	Hr 6 pi	Hr 12 pi	Day 1 pi	Day 2 pi	Day 4 pi	Day 5 pi
Trachea	0.20± 0.12(3)	1.13± 0.07(3)	1.13± 0.07(3)	1.27± 0.07(3)	1.40± 0.12(3)	1.80± 0.12(3)	2.30± 0.18(3)	2.47± 0.18(3)
Bursa of Fabricius	00± 00(3)	0.00± 0.00(3)	0.07± 0.07(3)	0.13± 0.13(3)	0.33± 0.18(3)	1.67± 0.87(3)	1.73± 0.84(3)	1.93± 0.07(3)
Spleen	00± 00(3)	0.13± 0.13(3)	0.20± 0.20(3)	0.20± 0.20(3)	1.07± 0.18(3)	1.67± 0.18(3)	2.53± 0.07(3)	2.73± 0.07(3)
Kidney	00± 00(3)	00± 00(3)	00± 00(3)	0.20± 0.20(3)	0.27± 0.27(3)	0.93± 0.13(3)	2.20± 0.12(3)	2.33± 0.07(3)

Note. Values in brackets represent the number of chickens. Hr indicates hour.pi indicates postinoculation of the virus. Control group tissues scored 0.