Epidemiology of dicroceliosis and changes in some chemical indices of muscular tissue and liver of cattle in the Republic of Moldova.
The study of the parasitological invasions and Dicrocoelium lanceolatum as of 8,000 cattle has been carried out in different time periods (1981-1982, 2001-2002) in private farms, family household and specialized in milk and beef production farming sectors with different maintenance technologies from the Republic of Moldova. The results of the parasitological research carried out in 1981-1982 have revealed the 22.3-33.5% incidence of dicrocoeliosis in adult cattle from farming sectors, 42.6-51.4% incidence in farms and 63.5-68.3% in cattle from family household; the incidence figures related to bull-calves population (as of 23-25 months) were 10.5-17.2%, 23.5-30.4% and 35.6-44.7% correspondingly. During 2001-2002 (a period just after the crucial changes that took place in the zoo technical sector) the carried investigations show that 78.6% of adult cattle and 74.5% of bull-calves populations have been found infested. Comparatively to the situation researched in 1981-1982, the level of invasion has increased by 31.0% in adult cattle and by 47.1% in bull-calves. Also, the study reveals the existence of the diversified parasitological agents definitive and complementary hosts as a result of the irregular dehelmintisation or its absence. It was determined that the cattle infested with dicrocoeliosis produce less meat and eatable by-products. Moreover, the content of some vitamins (A, E, B1, B2, C), micro-, macroelements (Ca, Mg, Na, K, Fe, P), chemical indicies (humidity, dry solid matter, proteins, fat, ashes) in muscular and liver tissues proved to be considerably changed considerably influencing the animal products' nutritional value.