Gastrointestinal Pathogenesis in Aquatic Animals - Aquaculture Nutrition: Gut Health, Probiotics and Prebiotics - page 58

M

Va

L

*

Mv

M

NE

5 μ m

Fig. 3.2 Transmission electron microscopy micrograph of the anterior intestine (midgut) of rainbow trout
exposed to V. anguillarum (Va) in an ex vivo challenge. Clear signs of tissue damage are characterized by
necrotic enterocytes (NE) and disorganized microvilli (star). Key: L, lumen; M, mitochondria; Mv, microvilli;
arrow, tight junctional complexes. Scale bar = 5 μ m. (Source: Harper et al . 2011.)

F

10 n

Fig. 3.3 Scanning electron microscopy of the proximal intestine of Atlantic salmon exposed to V.
anguillarum . Note several detached or detaching enterocytes (arrows) lacking uniform microvilli at the
epithelial surface. Scale bar = 10 μ m. (Source: Ringø et al . 2007.)