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

Figure 29

Cross-section of a balsam fir larva at a late stage of NeabNPV infection. Viral occlusion bodies (OBs) lie in the ectoperitrophic space between the peritrophic membrane (PM) and the midgut epithelium (ME). Tissues visible in the hemocoel include circular (CM) and longitudinal (LM) muscle, fat body (FB), and larger muscle masses (Mu) beneath the cuticle (C). Paraplast section, photomicrograph. Scale bar = 50 μm.