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1
Content available remote Wpływ parametrów niezawodności elementów pompowni na jej wskaźniki systemowe
100%
Bajer A.
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2011
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tom nr 11
63-68
PL
W artykule przedstawiono wyniki analizy niezawodności pompowni wodociągowej o wybranej przykładowo strukturze technicznej, która ogólnie określana jest przez liczbę podstawowych i rezerwowych agregatów pompowych oraz sposób rozwiązania części ssawnej i tłocznej. Analizę ukierunkowano na ocenę wpływu wartości parametrów niezawodności głównych elementów tego obiektu technicznego (agregatów pompowych, klap zwrotnych, zasuw odcinających) na osiągane przez niego wartości systemowych wskaźników niezawodności.
EN
This paper presents the reliability analysis of a water pumping system defined through the number of operating and back up pumps as well as through the technical construction of the design of suction and pressure pump sides. The analysis focuses on the impact of the values of reliability parameters of the main elements (pump sets, backflow valves, shutoff valves) on the obtained system reliability indexes.
2
Content available Helminty jelitowe wilkow [Canis lupus] z poludniowej czesci Pojezierza Mazurskiego: badanie koproskopowe
63%
Kloch A. , Bajer A.
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nr 3
301-305
3
Zarazenia Cryptosporidium spp. i Giardia spp. u psow zaprzegowych
63%
Bajer A. , Bednarska M.
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nr 06
681-687
EN
The aim of this study was to evaluate the distribution of intestinal protozoa Cryptosporidium spp. and Giardia spp. among the sled dogs taking part in an international competition during the Dryland World Championship IFSS, in Lubliniec, Poland, April 2005. Fecal samples (n = 80) were collected during the race and during two time periods: 2-4 weeks and 6-8 weeks after the race. The immunofluorescent assay (IFA) MerIFluor Cryptosporidium/Giardia was used for the detection of parasite dispersal stages in condensed samples. The influence of a range of factors on the prevalence and the intensity of cyst/oocyst production was estimated. Giardia spp. infections were identified in four studied countries with overall prevalence of 36%. Cryptosporidium oocysts were detected in samples from 2 of 4 countries with an overall prevalence of 12.5%. For both intestinal protozoa an identical dynamics of infection was noted, with the peak in prevalence and cyst/ oocyst production 2-4 weeks after WC, which supports the hypothesis of the enhanced risk of parasite transmission during the race. The number of dogs in kennels, dog sex, and age affected the Giardia infections in sled dogs. The prevalence or intensity of cyst production were higher in kennels with more than 10 dogs, in males compared to females, and in young (<2 years old) dogs. Cryptosporidium infections were more common among males and young dogs, and the prevalence was low among Husky breeds. The co-infections with both parasites were common and the presence of Giardia or Cryptosporidium infection was significantly connected with the presence of diarrhea in dogs. Consequently, it seems that protozoan infections may affect the physical condition and performance of sled dogs and contribute to zoonotic diseases in dog owners.
4
Content available Molecular study of transovarial transmission of Babesia canis in the Dermacentor reticulatus tick
51%
Mierzejewska E. J. , Dwuznik D. , Bajer A.
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nr 4
5
Content available Contribution of tick-borne diseases to mortality in juvenile free-living cervids
51%
Dwuznik-Szarek D. , Kowalec M. , Alsarraf M. , Bajer A.
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2022
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tom 29
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nr 2
6
Content available Diversity of Babesia microti in ticks Ixodes ricinus from North-Eastern Poland
51%
Welc-Falenciak R. , Bajer A. , Sinski E.
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tom 53
7
Molekularne badania inwazji Cryptosporidium spp.
51%
Bajer A. , Bednarska M. , Sinski E.
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nr 05
543-547
8
Content available Helmintofauna wolno zyjacych gryzoni a hormony sterydowe
51%
Kulis K. , Bajer A. , Sinski E.
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nr 3
615-622
9
Wskaźniki kontynentalizmu dla Łysogór według danych ze Satcji Meteorologicznej Swięty Krzyż w latach 1955-1990
51%
Olszewski J. L. , Szalach G. , Bajer A.
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tom 25
10
Content available Intestinal macro- and microparasites in wolves [Canis lupus L.] from North-Eastern Poland recovered by coprological study
51%
Kloch A. , Bednarska M. , Bajer A.
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nr 2
237-245
EN
Wolf scats collected during ecological studies in Mazury lake district in NE Poland were analysed for intestinal micro- and macroparasites. Five nematode species were identified: Ancylostoma caninum (Ercolani, 1859), Uncinaria stenocephala (Railliet, 1884), Trichuris vulpis (Froelich, 1789), Toxocara canis (Werner, 1782) and Toxascaris leonina (von Linstow, 1902). Among cestode species there were identified infections with Dipylidium caninum (Linnaeus, 1785). The overall helminth prevalence was 63.5% and average intensity was 15.4 ± 8.0 eggs /1g of sample. The most prevalent parasite was T. vulpis (38.5%) and the most abundant infections were by T. canis. Almost 55% of samples (28/51) were positive for C. parvum oocysts and 46.7% (14/30) for Giardia spp. cysts. The pack factor affected the distribution of some of macro- and microparasites. The identified parasite fauna of wolves in Mazury lake district consists of several micro- and macroparasites of interest for public health.
11
Content available Problem pasozytow jelitowych u psow zaprzegowych w Polsce
51%
Bajer A. , Bednarska M. , Rodo A.
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nr 3
199
12
Content available Modulacyjny wplyw inwazji Heligmosomoides polygyrus na przebieg zarazenia Cryptosporidium parvum u myszy C57BL-6
51%
Bednarska M. , Bajer A. , Sinski E.
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tom 53
85
13
Content available Environmental survey for Cryptosporidium sp. of wild rodents in the District of Mazury Lakes, Poland
51%
Sinski E. , Bednarska M. , Grygierczyk D. , Bajer A.
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nr 3
14
Wildlife rodents from different habitats as a reservoir for Cryptosporidium parvum
51%
Bajer A. , Bednarska M. , Sinski E.
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tom 42
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nr 4
EN
A variety of domestic and wild animals are considered to be potential sources of cryptosporidiosis in humans. However, despite considerable information available on Cryptosporidium spp. in humans and ruminants, a paucity of information exists for many species of wildlife rodents. The current study reports the prevalence of Cryptosporidium infection among rodent populations from different habitats in northern Poland. In autumn 1996, spring and summer 1997, a total of 287 animals (8 species of rodents from three different habitats: Clethrionomys glareolus and Apodemus flavicollis and A. sylvaticus from forest; A. agrarius, Microtus arvalis and M. oeconomus from field/meadow; Castor fiber and Ondatra zibethicus from semi-aquatic habitat) were examined for Cryptosporidium oocysts. Direct wet smears from unconcentrated faecal specimens were stained using a modified Ziehl-Neelsen method and/or direct immunofluorescent (MerIFluor Cryptosporidium/Giardia) assay. Faecal examination revealed that 41 of 132 (31%) C. glareolus, 26 of 96 (27%) Apodemus sp., 19 of 28 (68%) Microtus sp., 1 A. agrarius, 2 of 19 (10.5% colonies*) of C. fiber and 5 of 12 (42%) O. zibethicus were infected with Cryptosporidium oocysts. The intensity of infection was generally low, with <5 oocysts/slide film in most of the samples studied. The morphological characteristics and measurements of the oocysts (mean size 4.8 x 4.5 µm) conformed with those of C. parvum. This study indicates, for the first time in Poland, that semi-aquatic rodents, mostly O. zibethicus, and possibly rodents from other habitats may be involved as reservoirs of infection for C. parvum.
15
Content available Abundance of wild rodents, ticks and environmental risk of Lyme borreliosis: a longitudinal study in an area of Mazury Lakes District of Poland
51%
Sinski E. , Pawelczyk A. , Bajer A. , Behnke J. M.
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nr 2
EN
The results of a longitudinal epidemiological survey in two contrasting habitats in an area of the Mazury Lakes district of Poland indicate that both host and vector (Ixodes ricinus) densities, may be the most important risk factors for the tick-transmitted spirochetes of Borrelia burgdirferi s.l. However, the results also highlight that even related host species, such as the wild rodents Apodemus flavicollis and Clethrionomys glareolus that share the same habitat, can show quite different dynamics of tick infestation. We provide evidence that the woodland populations of A. flavicollis and C. glareolus are more frequently infested with larvae than nymphs, and more frequently with both stages than M. arvalis in the neighbouring open fallow lands. The prevalence of infestation with larvae varied from 92% for A. flavicollis, and 76% for C. glareolus to 37% for M. arvalis. Other factors, such as population age structure and sex, were also shown to impact on tick densities on hosts at particular times of the year and hence on the zoonotic risk. Moreover, particular species of rodents from different habitats, A. flavicollis (woodlands) and Microtus arvalis (fallow lands) carry infected immature I. ricinus ticks more frequently than C. glareolus voles (woodlands). Thus, the relative contribution of each species to the cumulative reservoir competence differs among species living in the woodland habitats and in relation to voles living in the fallow lands. It follows, therefore, that any factor which reduces the relative density of A. flavicollis in comparison to other hosts in the wild rodent community, will reduce also the risk of human exposure to Lyme borreliosis spirochetes.
16
Experimental transmission of Cryptosporidium parvum isolates from wild rodents and calves to laboratory bred common voles [Microtus arvalis]
51%
Donskow K. , Bajer A. , Bednarska M. , Sinski E.
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nr 1
EN
The oocysts of Cryptosporidium parvum isolated from Microtus arvalis, Clethrionomys glareolus and calves were used in laboratory experiments carried out on 35 M. arvalis. Oocysts were detected in 43% of 14 voles infected with C. parvum derived from calves and in 54% of 13 voles infected with C. parvum isolates from C. glareolus. All voles inoculated with oocysts from M. arvalis (MA-voles) developed infection. There were observed differences in courses of infection between the three groups of voles with MA-voles demonstrating the most typical curve with an acute phase of infection in the first 4 weeks and a 2-week- long phase of self-curing. The infections with 'heterologous' C. parvum isolates (C. glareolus and calf isolates) transformed into chronic infections with lower oocyst productions. A strong host age effect was observed on prevalence of C. parvum among voles of different ages. Eight-month-old voles did not become infected and in older animals the infections were milder. The successful cross-transmission of two C. parvum isolates to M. arvalis suggests that this species should be considered as reservoir host for this important parasite of humans and animals.
17
Content available Cryptosporidium spp. infections in hospitalized patients in Poland
45%
Bajer A. , Bednarska M. , Caccio S. , Kusierz-Wolska B. , Sinski E.
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tom 53
18
Content available Zwierzeta ziemnowodne jako zrodlo zanieczyszczenia wody Cryptosporidium i Giardia
45%
Bajer A. , Bednarska M. , Paziewska A. , Romanowski J. , Sinski E.
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tom 54
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nr 4
315-318
19
May parasitic invasions have a negative impact on sled dogs achievements?
45%
Bajer A. , Bednarska M. , Mierzejewska E. J. , Rodo A. , Welc-Faleciak R.
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nr Suppl.
20
Content available Wspolwystepownie Cryptosporidium parvum, Giardia spp. i helmintow w populacjach drobnych gryzoni
45%
Bajer A. , Behnke J. M. , Bednarska M. , Kulis K. , Sinski E.
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2004
|
tom 50
|
nr 2
307-315
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