Figure 4: A. Transmission electron micrograph of a 5y old dog control duodenal epithelium showing an intact brush border and unremarkable enterocytes, and goblet cells (GC). TEM x 7290 4B. TEM from a 4y old MCMA dog showing a disrupted epithelium with gaps between cells (GAP), wide spaces occupied by cell debris (DEBRI) and enlarged basal cell nuclei (NUCLEI). Goblet cells are marked GC. TEM x 7290 C. TEM from a 5.4 y old MCMA dog showing ample gaps between epithelial cells (GAP) with swollen cytoplasm and vacuolization of basal cells (*).Goblet cells are marked GC TEM x 7290

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