Figure 3

Transmission electron micrographs of Eustrongylides-infected Perca fluviatilis L. muscle. (a) Low magnification of the macrophages aggregates (MAs) in association with the Eustrongylides sp. larvae. The MAs appeared as group of large oval to round shaped cells (arrows) with a vacuolated and foamy appearance to their cytoplasm; scale bar = 3.3 μm. (b) Micrograph shows a macrophage aggregate with an eccentric polar nucleus (arrow) with marginal accumulations of chromatin. There are also cytoplasmic inclusions of various differing electron-densities, scale bar = 0.7 μm. (c) Two fibroblasts within the thickness of the capsule enclosing the larvae of the Eustrongylides sp., which are characterised by possessing elongated nuclei (arrows) and narrow cytoplasm, scale bar = 2.2 μm. (d) High magnification of a satellite cell beneath the basal lamina of the myofibres (asterisk) which possesses an elongated nucleus (arrow) and scarce-narrow cytoplasm; scale bar = 0.9 μm.