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Mass mortality was observed in a flock of reproductive turkeys. Due to the clinical picture and the sudden onset of the symptoms, poisoning with coccidiostats was suspected. In order to confirm the diagnosis, samples of feed, tissues and digestive tract content of the birds were sent to the Department of Pharmacology and Toxicology of the National Veterinary Research Institute to be tested for the presence of ionophore coccidiostats. The feed sent for analysis was found to contain narasin, salinomycin and monensin. The clinical signs of the poisoning, the presence of narasin in feed at a concentration of 26 mg/kg, together with the known toxicity of salinomycin and narasin to turkeys, suggested that the identified compounds were probably the cause of the fatal poisoning in the turkeys.
Six species of Eimeria were found in sheep from the mountain region of Poland: E. parva, E. pallida, E. nina-kohl-yakimovi, E. faurei, E. intricata and E. arloingi. E. parva (36.1%), E. nina-kohl-yakimovi (33.5%) and E. Faurei (30.2%) were frequently found. Seasonal dynamie of coccidiosis in lambs nontreated and treated with Lasalocid (20 mg/kg fodder) was obserwed. The maximum extensity and intensity in nontreated animals were found in the period from July to October (85-90% infected lambs). In lambs treated with Lasalocid the extensity was very low, i.e. only in 5-10% of treated animals single oocysts were found. Final weight was higher by about 5.4 kg and wool piroductivity by about 0.32 kg in the Lasalocid treated, compared with the control, nontreated group.
The aim of the study was to determine the effect of selected in-feed coccidiostats (ionophore coccidiostat monensin and plant coccidiostat) on the histological profile and physicochemical properties of breast muscles in fast and slow-growing chickens. The experiment was carried out with 480 fast-growing Hubbard Flex chickens kept until 42 days of age, and 480 slow-growing Hubbard JA 957 chickens raised until 63 days, which were divided into 3 feeding groups. The control group (K) received standard feed mixtures without additives. The mixtures for experimental groups also contained a complementary feed in the form of plant coccidiostat (A) or ionophore coccidiostat monensin (M). The highest body weight at 42 and 63 days was found in the group of birds receiving the plant coccidiostat (2548 and 3582 g, respectively). There was a tendency for higher feed consumption in group A birds characterized by the highest body weight at the end of rearing. Statistical analysis showed significant differences in the mortality of fast and slow-growing chickens. Mortality ranged from 1.82 to 5.72% in fast-growing chickens, and from 2.60 to 4.33% in slow-growing chickens. The use of different coccidiostat additives in the diet of chickens that were raised until 42 and 63 days of age had no significant effect on dressing percentage. The results of histochemical examination showed that slow-growing chickens were characterized by a greater diameter of breast muscle fibers compared to fast-growing chickens. The greater proportion of large-diameter fibers had a significant effect on increasing water holding capacity. The best water holding capacity was observed in the control group and in birds receiving the plant coccidiostat in their diets. Owing to the fact that active substances of plant origin do not require a waiting period, unlike the ionophore coccidiostats, they may be applied during the entire rearing period. In particular, these additives play a significant role in the maintenance of health status and welfare of chickens at a time when consumers expect food products free of pharmacological preparations.
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