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The authors describe an individual of the female Ascaris suum Goeze with a unique genital system. A female with such an anomaly was found during laboratory classes of Invertebrate Zoology at the Faculty of Biology and Environmental Protection, NCU. The specimen was about 200 mm long, and the total length of the reproductive system was 1970 mm. Further comparative analysis between unchanged and changed individuals revealed differences in the length of individual sections of the studied system, as well as in the diameter of the uterus. The described case is extremely interesting because of the phenomenon of eutely occurring in nematodes. The exact cause and mechanism of abnormalities described in Ascaris suum are not known and difficult to explain experimentally because of the extremely small number of these anomalies. Moreover, the interpretation of the anomaly is difficult because of the specific behavior and complex morphogenesis of this endoparasite.
The endoparasites of horses and donkeys of different ages from the Konya region in Turkey, between May 2003 and June 2005 were determined. The samples of fresh faeces were collected from 111 horses and 81 donkeys and sent to diagnostic laboratories for the examination by floatation, sedimentation, and Baermann-Wetzel methods. In addition, faecal cultures were prepared for the differentiation of larvae of Strongylidae. Parasites were encountered in 100% of horses and donkeys. Among the parasites determined in horses, the prevalence of Strongylidae, Parascaris equorum, Strongyloides westeri, Fasciola sp., Anoplocephalidae, Oxyuris equi, Trichuris sp., Dicrocoelium dendriticum, Eimeria leucarti, and Eimeria sp. was 100%, 10.81%, 7.2%, 3.6%, 2.7%, 1.8%, 0.9%, 0.9%, 4.5%, and 12.61%, respectively. In donkeys, the prevalence of Strongylidae, S. westeri, P. equorum, Fasciola sp., Anoplocephalidae, Oxyuris equi, Dicrocoelium dendriticum, Eimeria leucarti, and other Eimeria sp. was 100%, 12.34%, 9.8%, 6.17%, 6.17%, 1.23%, 1.23%, 3.7%, and 22.22%, respectively. According to faecal cultures, the prevalence of Strongylus vulgaris, Strongylus edentatus, Trichonema sp., Triodontophorus sp., and Poteriostomum sp. was 31.53%, 17.11%, 58.55%, 6.3%, and 5.40% in horses, respectively, and 23.45%, 14.81%, 74.07%, 4.93%, and 2.46% in donkeys, respectively.
Research into the determination of intestinal parasitic levels in free-living animals can provide knowledge enabling action to be taken to improve their health status. The aim of the study was to determine the relationship between the carcass weight of wild boars and the degree of endoparasite infection. The research was performed on 165 culled wild boars, from which a representative group (n = 50) was separated and divided according to sex (males n = 24, females n = 26) and age (2-3 years). Separate weight groups were defined for males (< 70 kg, n = 6; 70-80 kg, n = 9; > 80 kg, n = 9) and females (< 45 kg, n = 10; 45-60 kg, n = 10; > 60 kg, n = 6). Oesophagostomum spp., Ascaris suum, Trichuris suis, Eimeria spp. and Strongyloides ransomi were observed and defined in the study population. A statistically significant effect of the overall infection on carcass weight was obtained (F = 9.96; P ≤ 0.01). In the case of overall infection, a more than 7 kg lower carcass weight was observed in infected males. A carcass weight over 15 kg lower was noted for overall infection of females (F = 38.47; P ≤ 0.01), for which average EPG was 2946.67 ± 6485.31 with a median of 400 (50-25 300). Correlations were proven between sex and the average number of Eimeria spp. oocysts, and carcass weight for males (r = –0.84, P ≤ 0.05). In the case of females, correlations were noted between carcass weight and infection by nematodes (r = –0.63, P ≤ 0.05). Studies have shown that there is a need to monitor the environment in order to improve the condition of free-living animals.
The present study reports the levels of mercury and selenium in Sarpa salpa and Balistes capriscus collected along the coast of Mahdia and Sfax (Tunisia). The systems constituted by S. salpa and Robphildollfusium fractum and by B. capriscus and Neoapocreadium chabaudi were tested as potential bioindicators to monitor environmental Hg pollution in marine ecosystems. Mercury and selenium concentrations were assessed in kidney, liver and muscle of 51 S. salpa and of 45 B. capriscus as well as in their respective endoparasites R. fractum and N. chabaudi. The Se:Hg molar ratios were evaluated for both species across the study areas. Surprisingly, the Se:Hg molar ratio in B. capriscus muscle from Mahdia is significantly lower than in Sfax. Our results indicate that some parasites may also be implicated in the amount of Se and Hg available in tissues and therefore contribute to oscillations of the Se:Hg molar ratios. In the model involving the carnivorous species (B. capriscus), the 5.1-times higher levels of mercury in N. chabaudi than in B. capriscus muscle in Sfax enable this fluke to be a sensitive biomonitoring tool for Hg pollution. The present results confirm that the habitual consumption of S. salpa should not suppose any potential health risk for Tunisian people. On the other hand, the consumption of B. capriscus may be of concern and further monitoring is advisable, since the Hg average concentration in Mahdia was above the maximum allowed Hg concentration in the edible portion of fish fixed by the European Union.
Parasites in dogs – prevention and control according to the questionnaire analysis. The aim of the study was to determine the extent of knowledge of dog owners on the incidence of parasitic diseases, their negative consequences and preventive measures. The research material was based on data from 162 anonymous questionnaires. The study was conducted in the period between July and October 2015, among owners of dogs living in different regions of Poland. Analysis of the results showed that most respondents were aware of the dangers posed by the development of parasitic diseases in their animals, however the extent of their knowledge was insufficient and required further deepening. Unfortunately, 6% of owners do not use any form of antiparasitic prophylaxis. Less than half of the respondents declared that they regularly pick up their dog’s waste. More than half of the surveyed owners were not aware of the type and programme of antiparasitic prevention used by the vets, or the necessary changes in the dog's pharmacological treatment. The largest group of owners (32% of respondents) used the prevention of ectoparasites twice a year. Nearly half of the respondents used antiparasitic drops as a precaution against ectoparasitic diseases, while 33% used antiparasitic collars. 40% of respondents seeking to increase the effectiveness of protection against parasitic infestations applied two different forms of treatment simultaneously. The results of the questionnaire surveys indicated, according to specialists recommendations, that there was insufficient frequency of using antiparasitic treatment against endoparasites. Single deworming was performed by 41% of respondents while the smallest group of respondents (12%) did it three times.
The aim of the present study was to detect the alterations of Pseudoplatystoma corruscans parasite infracommunity structure, after the construction of the Porto Primavera dam on the high Paraná River floodplain. The execution of this research was based on 119 host specimens collected between March 2011 and September 2012, and the results were compared to studies performed on periods before the reservoir’s construction, when 110 fishes were collected between March 1992 and February 1993. Five parasite species still remain on the environment, despite the environmental modifications: Choanoscolex abscissus, Spasskyelina spinulifera, Nomimoscolex pertierrae, Harriscolex kaparari and Contracaecum sp 2. The Berger-Parker dominance index, calculated to the parasite fauna of 1992, did not show the dominance of any species, while, on the present days, this same index accused the dominance of Nomimoscolex pertierrae (49%) and Choanoscolex abscissus (50%). The present study reports the disappearance of Megathylacus travassosi, Contracaecum sp. 1, Contracaecum sp. 3, Procamallanus (Spirocamallanus) sp. and Cucullanus pseudoplatystomae, suggesting the possibility of a local extinction or a host switch of these species. It has also been registered an Acanthocephala specimen, a genus not observed on this host yet. The results here presented show that the antropic influences on natural systems alter the environmental conditions, what is reflected on the richness and diversity parasite levels.
The present distribution of the Alpine marmot Marmota m. marmota (Linnaeus, 1758) in Austria, the historical range during the Pleistocene, and recent efforts of re-introduction were documented. Autochthonous populations inhabit a continuous range extending over the western part of the Austrian Alps. Non-autochthonous populations occur in a more fragmented area of partly isolated massifs in the east. The non-autochthonous populations were generated by the release of only a few founder individuals (median = 5). The impact of founder effects and migration barriers on the structure of the disjunct non-autochthonous populations is confirmed by the genetic analysis of allozymes and VNTR-loci. Whereas autochthonous populations are characterized by high genetic similarity and common polymorphisms, the non-auto- chthonous populations exhibit a more patchy pattern of variation caused by founder effects and subsequent drift. From the relationships indicated by the VNTR-patterns it appears possible to infer the putative origin of the founder individuals. In previous allozyme studies the genetic variability was found to be reduced with the exception of two widespread polymorphisms at the loci Pep-1 and Sod-1. A parasitological survey shows that Pep-1 genotypes differ in their degree of infestation by endoparasites (Citellina alpina and Ctenotaenia marmotae) indicating that this polymorphism may be maintained by selective forces.
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