We recently received two similar cases of lambs with granulomatous lesions in the liver.

In both cases the lesions were superficial and had adhesions to other serous membranes. Histologically granulomatous inflammatory changes were observed: extensive central necrosis surrounded by abundant epitheloid macrophages, some multinucleate giant cells and presence of eosinophilic polymorphonuclear leukocytes.

The lesions are suggestive of a parasitic etiology and its location is compatible with a degenerate Cysticercus tenuicollis cyst . In case 2 the presence of mycobacteria was ruled out using Ziehl Neelsen, PCR and mycobacteria culture since the samples was submitted as suspected TB case, a disease to which sheep are also susceptible.

Case 1: Granulomatous lesion in the liver of a three months old lamb.

Case 1: Granulomatous lesion in the liver of a three months old lamb.

Case 2: very similar, superficial, granulomatous lesion in another lambs' liver.

Case 2: very similar, superficial, granulomatous lesion in another lambs’ liver.