Fig. 5

Photographs showing infected muscle tissues with T. spiralis larvae in two groups treated with MCS only (groups IBc and IIBc). Staining: H&E; magnification: ×50. Blue arrows indicate inflammatory cells, red arrows show vacuolation or/and hyaline wall. a, b Non-sensitized mice treated with MCS (group IBc); some larvae are intact and some show features of degeneration, such as vacuolation or/and hyaline appearance with very few inflammatory cells. c, d Sensitized mice (group IIBc) with a few cystic lesions, with intact larva (c) and those showing absence of cystic lesions with a few inflammatory cells (d)