Abstract
The cellular components of the hepatic inflammatory infiltrate in cattle and buffaloes infected with a single dose of 1000 Fasciola gigantica were analysed by immunohistochemistry and histology. T and B lymphocytes, plasma cells, eosinophils and mast cells were present in the hepatic lesions. It is proposed that both cellular and humoral immune responses were induced in the liver of cattle and buffaloes during infection with F. gigantica probably by antigens released by the developing flukes and by damage caused by the flukes during their migration in the liver. The local T cell response differed between these animals, with the response decreasing after 3 weeks post-infection in cattle in contrast to a gradually increasing response in buffaloes. Difference in the T cell response between cattle and buffaloes may be related to their differences in resistance and resilience to infection with F. gigantica.
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