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The aim of the study was to evaluate the efficiency of various methods of antiparasitic prophylaxis using a conventional chemical agent and a formulation containing plant essential oils. The animal material consisted of 139 mother ewes of two synthetic prolific meat lines: BCP and SCP. During the entire experiment the animals were kept in an indoor management system with uniform environmental conditions. The experiment included ewes lambing within the period of 12 consecutive days. Using the results of coproscopic tests performed after lambing, the animals were randomised into three study groups: Group A – wormed with an albendazolecontaining preparation (50 sheep); Group L – receiving a lick with antiparasitic essential oils (48 sheep); and Group C – control group, not wormed (41 sheep). Two antiparasitic agents were used. A chemical agent containing albendazole. The procedure was performed on day 35 after lambing, and the dose administered was 5 mg of the active substance per kg bw, which corresponded to 0.5 ml orally, per 10 kg bw. A natural worming agent was administered in the form of licks containing essential oils of Thymus vulgaris, Allium sativum, Artemisia absinthium, Dryopteris filixmax, Tanacetum vulgare, Cucurbita pepo, Chenopodium ambrosioide, Inula helenium, Peumus boldo and Corallina rubens. The licks were made available to animals on day 21 after lambing. The experiment involved parasitologic tests aimed at the determination of estimated intensity (based on OPG and EPG data) and prevalence of invasions of gastrointestinal parasites in mother ewes. The study material was faeces collected from the rectum on the following dates: after lambing, and on day 28, 42, 56, 70 and 100 of a lamb’s life. The observations proved that the formulation based on natural plant ingredients had a beneficial influence on the reduction of prevalence of Eimeria and Capillaria. It was also shown that the albendazole-containing chemical preparation is highly efficient in reducing the prevalence of Trichostrongylidae, Nematodirus, as well as Capillaria.
Our objective was to compare the effects of a conventional antiparasitic chemical drug and a lick block containing plant-based compounds on the economic value of lambs. Ewes and their new-born offspring were allocated among three treatments: a group receiving standard drenching with an albendazole-containing drug, a group supplied with a lick block containing essential oils from 10 plant species having antiparasitic properties, and a control group that was not dewormed. During the experiment, all lambs were given periodic birth weighings at 28, 56, 70 and 100 days of age. The results obtained were the basis for the estimation of the economic value of lambs reared in particular experimental groups of the observed animals. The average price earned for slaughter material in each weight standard was used to calculate the differences between the groups. The current prices were made available by the Regional Association of Sheep and Goat Breeders in Lublin. All lambs (live at 56, 70, 100 and 120 days) were included in calculations of the average value of the animals. In the case of lambs falling within the standard 0 to 12 kg, a value for 0 PLN per kilogram was assumed because of the lack of sales potential. At 56 days, the value of the lambs in the group receiving feed with the addition of essential oils was 11.90% higher than that of the lambs from control group. At 70, 100 and 120 days, the value of those lambs was higher than that of the lambs from control group by 21.13%, 4.99% and 5.51%, respectively. The value of the lambs from the group receiving standard drenching with an albendazole-containing drug was similar to that of the lambs from the undewormed group. The results of the research indicate that it is beneficial to use natural substances in the prevention of parasitic invasion. The use of natural methods to reduce parasitic infestations will reduce the application of chemicals, which is extremely important due to the increasing resistance of parasites and the preferences of consumers, who search for products free of harmful residues of medicinal substances.
The aim of the study was to evaluate the influence of preventive activities involving the use of a coccidiostatic product containing Origanum vulgare and Citrus spp. extracts on the slaughter value of lambs from a confined management system. The study material was a group of 222 mother ewes and 276 lambs of the Polish Lowland breed. During the whole experiment the animals were kept in a confined management system, indoors, with uniform environmental conditions. On the basis of the parasitological analysis the flock was divided into three groups similar in both the intensity and the extensity of parasitic infections: Group 1: a control group, whose diet was not supplemented (74 mother ewes, 87 lambs); Group 2: diet supplemented with OILIS SD, a product with coccidiostatic effect, from the third month of pregnancy to lambing the lambs were fed like the control group (73 mother ewes, 105 lambs); Group 3: diet supplemented with OILIS SD, a product with coccidiostatic effect, from the third month of pregnancy to lambing, the lambs receiving feed with OILIS SD starting from the 14th day of life (75 mother ewes, 84 lambs). Out of 276 lambs included in the experiment, 18 rams and 18 ewes representing all the observed groups were chosen for slaughter. The lambs were slaughtered around day 100 of their life (± 6 days). The observations showed that the animals from Group 3, in which the feed of both mother ewes and lambs was supplemented with a coccidiostatic product, were characterized by a higher slaughter weight: 30.80 kg, in comparison to 27.80 kg in Group 1 and 26.90 kg in Group 2, which has been confirmed as statistically significant (p ≤ 0.05). This corresponded to the achieved carcass weight. The highest average hot carcass weight (13.36 kg) was noted in Group 3, while the parameters for Group 1 (11.88 kg) and Group 2 (11.28 kg) were significantly lower (p ≤ 0.05). The conducted post-slaughter analysis clearly showed that the coccidiosis prevention measure consisting in a product containing the ether oils of Origanum vulgare (Lamiacea) and Citrus spp. (Citraceae) has a beneficial influence on the slaughter value of lambs, and results both in a higher carcass weight and the weights of specific cuts and tissues.
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