An evaluation of lesions in the livers of Black and White cattle, aged 4 to 7, naturally infested with Fasciola hepatica was performed. The studies included a comprehensive analysis of histological lesions and liver enzyme activities determined with histochemical methods depending on the degree of natural Fasciola hepatica infestation. The studies revealed increased number of reticular fibres, ...

The context of an operational description is given by the distinction between what we consider as relevant and what as irrelevant for a particular experiment or observation. A rigorous description of a context in terms of a mathematically formulated context-independent fundamental theory is possible by the restriction of the domain of the basic theory and the introduction of a new coarser topol...