Уточнить поиск
Результаты 1-3 из 3
Nutritional and pathophysiologic effects of clinically apparent and subclinical infections of Ostertagia ostertagi in calves
1992
Xiao, L. | Gibbs, H.C.
Nutritional and physiologic effects of clinically apparent and subclinical Ostertagia ostertagi infections were studied in 3 groups of 5 calves each. Group-1 calves were inoculated with 100,000 Ostertagia ostertagi third-stage larvae (L3)/calf/wk for 14 weeks. Group-2 calves were inoculated with 10,000 L3/calf/wk for 14 weeks, and group-3 calves were not inoculated. Calves in group 1 had decreased dry matter intake and feed utilization from 4 weeks after initial inoculation. Group-2 calves had no changes in dry matter intake, but had decreased feed utilization at 12 and 14 weeks. Calves with clinically apparent infections (group 1) lost a mean weight of 11.8 kg, whereas calves with subclinical infections (group 2) lost a mean of 46.6 kg, and control calves lost a mean of 60.7 kg. Calves with O. ostertagi infections (groups 1 and 2) also had decreased carcass quality at slaughtering, which was reflected in decreased dressing weights and increased water-holding capacity of the rib-eye muscle. Calves in groups 1 and 2 also had lower carcass yield and rib-eye muscle weight, and group-1 calves had decreased protein content. Results of hematologic, pathologic, parasitologic, and clinical examinations mirrored nutritional changes.
Показать больше [+] Меньше [-]Indices for nutritional condition and thresholds for winter survival in sika deer in Hokkaido, Japan
2000
Yokoyama, M. (Hokkaido Univ., Sapporo (Japan)) | Uno, H. | Suzuki, M. | Kaji, K. | Ohtaishi, N.
Медико-биологическая роль селена
2009
Voloshin, D.B. | Zavodnik, L.B. | Pechinskaya, E.S., Grodno State Agrarian Univ. (Belarus)
This article is devoted to a problem of biochemical interaction of selenium and antioxidational system of animals and people organism. The problem we have touched is about the efficiency of influence of organic and inorganic taking place on subcellular level. The advantages of organic selenium are proved, the degree of its bjochemical influence on an antioxidationi status of health are indicated.
Показать больше [+] Меньше [-]