Research Article

Pathology of a Gammabaculovirus in Its Natural Balsam Fir Sawfly (Neodiprion abietis) Host

Figure 26

Cross-section of midgut epithelium at 120 hpi. One cell has detached (DC) from the midgut epithelium. This process results in gaps in the epithelium layer where there are no cells lying adjacent to circular (CM) and longitudinal (LM) muscles. Masses of bacteria (B) lie, in the gut lumen, adjacent to an epithelial cell with an enlarged nucleus containing virogenic stroma (VS) and occlusion bodies (OBs). There appears to be a disruption in the cytoplasm (between arrows) of the epithelial cell to the left of the gap in the epithelium. Microvilli (MV) are evident in this and the adjoining epithelial cell. Epoxy section, photomicrograph. Scale bar = 20 μm.
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