Abstract:
The article presents data of the level of infestation of adult cattle (4-6 years) and bulls (23-25 months) with Fasciola
hepatica in different periods of time and in households with different maintenance technologies. The results of
parasitological research carried out in households with various maintenance technologies of the Republic, during the
years 1986-1987, as well as after a large number of animals were redeployed from complexes and farms to private
households (2001-2002) demonstrated that adult cattle were infested with fasciola in 66.4% of cases, or by 35.8% more
than in the period of 1986-1987, and bulls - in 46.1% of cases, respectively by 30, 4% more. In order to establish the
nutritional value of muscle tissue and liver in cattle infested with fasciola, the content of vitamins A, E, B1, B2, C,
micro- and macroelements Ca, Mg, Na, K, Fe, P was determined and deviations were determined major in the content
of these indices. In the body of animals infested with fasciola, associations of highly pathogenic colibacilli,
staphylococci, streptococci, aerobic and anaerobic bacilli are formed, the synergistic pathogenic action of which causes
major modifications in the host's body, and in some cases even lethal conditions. Thus, in the primary infestation with
fasciolae metacercariae, the highest level of infection of the liver with aerobic bacteria (colibacilli, staphylococci,
streptococci) was established on the 60th day (the acute stage of the disease, young fasciolae actively migrate into the
liver parenchyma). Then the number of bacteria in the liver and bile gradually decreases, which is explained by the
immunological transformations that take place in the animal's body (the bactericidal activity of bile and the phagocytic
activity of neutrophils increases, as well as the concentration of specific antibodies against bacteria) and the significant
decrease in the rate of destruction of liver parenchyma by adult trematodes.
