[Diseases of the fallow deer in northeastern Bulgaria and their prevention].

Stated are the values of the basic microelements in fallow deer in the region of Northeast Bulgaria as established through biogeochemical analysis. In unfavourable years metabolism is disturbed resulting in lowering the defense mechanism of the body. A number of bacterial species, and, more specifically, Escherichia coli increase their virulence and cause gastrointestinal disorders and diseases.

[Effect of dextrofer 100 and dextrofer 100 with B12 on the growth and fertility of mink].

The effect was followed up of dextrofer-100 and dextrofer-100 with B12 on the growth and fertility of minks. It was found that the i/m injection of dextrofer-100 at the rate of 0.5 cm3 per head (50 mg Fe3+), twice, at the interval of 45 days to a total of 45-day-old minks did not effect essentially their growth.

[Nutritive action of flavophospholipol and virginiamycin on broiler pullets].

Studied were some of the aspects of the antibiotic treatment with flavophospholipol (moenomycin) as the preparation flavomycin, and virginiamycin (staphylomycin) as the preparation escalin in a premix form as an animal formula. It was found that the antibiotics tested acted as nutrients: they had a positive effect on the growth and feed conversion. They raised the production of meat and improved the quality of the meat product in terms of higher protein and mineral contents.