FIG. 7.
(A) Subepicardial hemorrhages (arrow) in the heart muscle of salmon infected with the wt A. salmonicida subsp. achromogenes strain (Keldur265-87) (magnification, ×10). Black box, bacterial colony. (B) Enlarged view of a bacterial colony (inside the circle) from panel A (magnification, ×40). (C) Massive accumulation of bacterial colonies in the heart muscle of salmon infected with the ΔasaP1 mutant A. salmonicida subsp. achromogenes strain (Keldur265-87-2) (magnification, ×10). (D) Enlarged view of bacterial colonies from panel C (magnification, ×40).