Table-4.

The score of pathological lesions for all groups in experiment 1.

Organ	Group	Age of birds
		7 days			14 days
		S1	S2	S3	S1	S2	S3
Kidney	1	+++	++	+++	+++	++	+++
	2	+	-	+	+	+	-
	3	-	-	-	-	-	-
	4	-	-	-	-	-	-
Trachea	1	++	++	++	++	+++	++
	2	-	-	-	+	+	+
	3	+	+	-	-	-	-
	4	-	-	-	-	-	-
Spleen	1	+	++	+	+++	+++	+++
	2	+	+	+	+	-	+
	3	-	-	-	-	-	-
	4	-	-	-	-	-	-

S1, S2, and S3: Number of tissue samples examined. (+): Mild/(++): Moderated/(+++): Severe