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The aim of the study was to compare the course and dynamics of strongyles invasions in a year-long cycle in primitive Polish horses of different ages and sexes from one breeding farm. Studies were carried out on 15 mares, 5 stallions, 6 geldings, 17 young mares (1.5-2 years old) and 14 colts (the same age as the mares). All the animals were treated twice with anthelminthics: first in December 2003 with Equimax and second in May 2004 with Abamitel Plus. Samples of faeces were taken at monthly intervals and examined using the flotation method according to Fulleborn and McMaster. All the horses had been infected before treatment with strongyles. The intensity of invasion ranged from 40 to 980 eggs per gram of faeces. The extent of invasion did not change significantly in the horses after the first or second treatment - only its intensity diminished. The intensity of invasion in stallions was very minor, whereas there was no considerable elimination of strongyles in mares remaining at pasture from May to October. The only decrease in the number of eggs in faeces was ascertained in January and then in July. In August, however, there was a considerable increase in the invasion which peaked in November. A significant decrease in the strongyles invasion occurred after the first treatment in colts and it completely waned in the young mares, but then its intensity increased slowly in the latter group and peaked in May. The invasion significantly decreased following the next treatment, but only for the month of July, whereas it began increasing from August and was the highest in young mares in October and in the colts in November. In the case of geldings the intensity of strongyles invasion was minor until July and only increased in August and September with its peak occurring in December. The results of both the study as well as those of authors quoted in the article suggest that in order to attain a significant decrease of strongyles invasions horses should be treated not only during autumn-winter (November-December) and before the grazing season (May), but also at the turn of July-August.
The aim of the study was to compare the course and dynamics of strongyles invasion in treated and untreated primitive Polish horses. Grovermina paste (ivermectin) was used in September for treating horses from a group of stables. One month following the treatment the extensiveness of strongyles invasion in the mares decreased to 19% and the following month it had increased to 71%. From December the eggs of the nematodes were observed in the faeces of all the mares. The lowest intensity of invasion was in October, following which it slowly increased. In March it was similar to its state prior treatment. In stallions from the same group, the eggs of strongyles were not found in all months except October. In horses from forest breeding, the eggs of the nematodes were found during the whole period of the study. In September, October and November their number in mares' faeces was considerably higher than in mares from alcove breeding, while in stallions it was elevated only in November. Based on the data obtained it was ascertained that the strongyles invasion reappeared after 2-3 months in horses during their period when they were kept in stables
The aim of the study was to assess strongylus invasions in mares during the first three months of pregnancy. Studies were carried out on 11 mares naturally infected with strongyles and divided into 3 groups: I - mares following 1-2 deliveries, II - 3-6 deliveries, and III - 9-10 deliveries. Each group was additionally subdivided into 2 subgroups: A included mares which had bred mare foals and B - mares which had bred stallion foals. Samples of excrement were collected during the following periods: 7 days before delivery and next at weekly intervals up to day 63, and then every two weeks up to day 115 following the delivery date. The intensity of strongyles invasions in the mares was directly related to the postnatal period, number of deliveries and even the sex of the foals. Analyzing the course of the strongyles invasion indicated that the greatest number of eggs were contained in the excrement on day 21 post delivery in the all the groups of mares breeding mare foals whereas a significant decrease in the amount of eggs was noted in mares breeding stallion foals on that day, and it only significantly increased on day 28. During the following gestations the intensity of the strongyles invasion was reduced up to day 42 in group A of the mares and day 49 in group B. A gradual increase in the number of eggs was observed up until day 77 e.g. there were 1000 eggs in group A on day 115 following delivery, and 796 in group B. Hormones produced in the estrus period and early pregnancy seem to affect the progress of Strongylidae invasions in mares.
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