Table 4.

Comparative scores of histopathological lesions of gill and liver tissues of infected fish by bacteria S. iniae

Tissue	Lesions	Treatments
Control-	Control+	A. vera 0.5%	A. vera1%	A. vera 1.5%	S. officinalis 0.5%	S. officinalis 1%	S. officinalis 1.5%	Erythromycin
Gill	Epithelial separation from the lamellas membrane	-	+++	++	++	+	-	-	+	+
	Necrosis of lamella	-	+++	++	-	-	++	++	-	-
	Atrophy of gill filaments	-	+	+	-	-	+	+	+	+
	Hyperemia in the filaments	-	++	+	-	-	++	-	-	-
	Inflammatory and clubbed secondary lamellas	-	++	-	++	-	-	++	++	-
Liver	Influence of lipid vacuoles in hepatocytes	-	+++	++	++	+	++	++	++	++
	Nucleus pyknosis	-	++	+	+	+	++	++	+	+

Key to scores: -: No lesions, +: Mild, focal lesions, ++: Mild, multifocal lesions, Severe lesions +++