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

Table 9

Lesions scoring (0-5) induced by velogenic and lentogenic NDV strains in HE stained trachea, bursa of Fabricius, and spleen tissues on day 5 pi.

	vNDV	lNDV	Control
Trachea	5.00 ± 00 (5)	1.40 ± 0.15 (5); 0.20 ± 0.1	00 ± 00 (5)
Bursa of Fabricius	4.84 ± 0.09 (5); 5.00^∗∗	2.28 ± 0.12(5); 2.3	00 ± 00 (5)
Spleen	5.00 ± 00 (5); 4.00^∗∗	1.80 ± 0.13 (5); 1.3	00 ± 00 (5)

Values between brackets indicate the number of examined tissues.
scoring of tissues inoculated with LaSota 1 and 2 when chickens were 21 days old and 31 days old, respectively. Lesions were recorded when chickens were 40 days old [5].
scoring of tissues inoculated with LaSota (GenBank accession numberAF077761). Lesions were recorded 4 days pi [6]. ^∗∗Lesion scoring of tissues infected by Quail2006 isolate, velogenic strain, lesions were recorded 4 days postinoculation, chicken embryo mean death time (MDT) = 47.0, intracerebral pathogenicity index (ICPI) = 1.94, GenBank accession number EU518684 [9].