Research Article
Scoring System for Lesions Induced by Different Strains of Newcastle Disease Virus in Chicken
Table 1
Lesions scoring (0-5) induced by vNDV in HE stained trachea, bursa of Fabricius, and spleen tissues on days 3, 6, and 7 pi.
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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. |