title: [The effect of monensin on performance and selected biochemical and hematological parameters in the blood of calves].
abstract: The aim of this study was to find out the influence of monensin, a ionophore antibiotic, on calf performance and selected physiological parameters. Monensin is a product of Streptomyces cinnamonensis. It has effects on all Gram-negative microbes, such as Escherichia coli, salmonellas, pseudomonads and vibria. It has a small effect on Gram-positive microbes. At the beginning of the experiment eight young crossbred bulls (C x N) at the age of three weeks were weighted and divided into two groups, experimental and control ones. Calves were kept in individual boxes and fed acidified whole milk (2 ml of 85% formic acid per 1 litre of milk). They had a free access to concentrates (COT), hay and drinking water. The calves received 3 lt. of whole milk twice a day until the age of eight weeks. 0.5 mg of monensin per 1 kg live weight were served orally to calves of the experimental group every day. Monensin was made by the Spofa Corporation, Prague. Daily intake of feed was recorded and the calves were weighted once a week. Blood samples were taken from the jugular vein before the beginning of the experiment, and in the period from the fifth to the tenth week of age, always before morning feeding. The average daily live weight gain was 0.452 kg and 0.471 kg for the control and experimental group, respectively, during the milk feeding period, the index being 104.2 (Tab. I). Tab. II shows the average feed intake per 1 kg live weight gain.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Výzkumný ústav zivocisné výroby, Praha-Uhrínĕves.
authors.forename: V
authors.initials: V
authors.lastname: Skrivanová
authors.forename: L
authors.initials: L
authors.lastname: Machanová
authors.forename: T
authors.initials: T
authors.lastname: Svoboda
mesh_terms: D000821:Animal Feed; D000818:Animals; D002417:Cattle / Q000097:blood*; D008297:Male; D008985:Monensin / Q000494:pharmacology*; D015430:Weight Gain / Q000187:drug effects
chemical_list: D008985:Monensin
vernacular_title: Vliv monensinu na uzitkovost a vybrané biochemické a hematologické parametry krve telat.