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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Histopathologic and immunohistochemical lesions in liver of mink infected with Aleutian disease virus

100%
Valdovska A., Pilmane M.
Polish Journal of Veterinary Sciences
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2011
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tom 14
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nr 1
Parvovirus of Aleutian disease causes mainly damage to kidneys, but immune complexes deposition and damage may occur also in other organs. In mink farms of Latvia the liver dystrophy or hepatic lipidosis of mink is widely distributed. The goal of this study was to examine probability of liver damage and regeneration of mink infected with Aleutian disease virus. Liver injury was assessed histologically. The mink liver demonstrated inflammation of liver parenchyma and foci of fatty liver. In immunohistochemistry, during liver regeneration the matrix metalloproteinases MMP-9, vascular endothelial growth factor and β-defensin 2 expressions were lower, but MMP-2 and nerve growth factor receptor p75 expression was increased.
2
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Alternative for improving gut microbiota: use of Jerusalem artichoke and probiotics in diet of weaned piglets

61%
Valdovska A., Jemieljanovs A., Pilmane M., Zitare I., Konosonoka I. H., Lazdins M.
Polish Journal of Veterinary Sciences
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2014
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tom 17
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nr 1
The aim of the study was to determine the effect of Jerusalem artichoke and probiotics on defence activity of intestinal cells of weaning pigs. One hundred eighty piglets (7 weeks old) were fed with basal feed supplemented with Jerusalem artichoke, Lactobacillus reuteri and Pediococcus pentosaceus. After 5 weeks, the piglets were slaughtered and the gastrointestinal contents and intestine samples were taken for analysis. Results demonstrated that in pigs fed basal diet with both probiotics and Jerusalem artichoke (5% of basal diet) (T3 group) had less (P<0.05) faecal Enterobacteriaceae microorganisms and coliforms and had more (P<0,05) faecal Lactobacillus than in pigs from other groups. Increase by 2% of Enterobacteriaceae and E.coli levels were seen only in control piglets (T1 group). E.coli O157 was found at the closing stage in the piglets fed basal diet with only Jerusalem artichoke powder (T2 group), but Salmonella enteritidis - only in T1 group. In jejunum of T2 group piglets, large deterioration of crypts, a moderate inflammation process and plasmocytes were seen, but in jejunum of T3 group piglets - branching of apical surface of villi, moderate degeneration and mitosis of enterocytes were observed. A moderate number of apoptotic cells in T2 group was found mainly in colon inflammation cells and plasmocytes, but for T3 group piglets - both in jejunum enterocytes and migrating cells. Our study indicated that β-defensin 2 and 3 expression in jejunum and colon segments were incresed in T1 and T2 groups. Findings suggest that feeding with probiotics and Jerusalem artichoke significantly improves the microbial contents, defence and regeneration processes in the intestine of pigs.
3

MRSA in pig population

61%
Ivbule M., Miklasevics E., Cupane L., Berzina L., Balins A., Valdovska A.
Polish Journal of Microbiology
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2017
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tom 66
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nr 3
Methicillin resistant Staphylococcus aureus (MRSA) is widespread worldwide in different types of animal species and as a zoonosis takesa great risk for human health not only as a food toxicoinfection, but also as a highly resistant pathogen causing serious soft tissue infectious, septicaemia and even death. One of the most affected food-producing animal species is swine in the production of which new antibiotics in big amounts are used more and more continuously, increasing antimicrobial resistance. In this study several commercial pig farms and pigs with different age groups as well as farm workers and samples from environment were examined with the purpose of detecting MRSA prevalence and evaluating antimicrobial resistance. A total of 85 isolated MRSA strains were characterised by conventional microbial and molecular methods. MRSA was found in all farms. MRSA prevalence in different pig age groups and farms varied from none to 79.2% reaching higher values among 3–3.5 (26.6%) and 4–4.5 (31.9%) old pigs. The 98.7% of 74 further investigated MRSA isolates were resistant to penicillin, 94.9% to tetracycline, 45.6% to cephalexin and 10 different spa types were found among which spa type t011 was the most widespread. To the best of our knowledge, this is the first time MRSA was researched in sow milk and the first description of the presence of MRSA in several age groups of pigs in Latvia.
4

Presence of methicillin-resistant Staphylococcus aureus in slaughterhouse environment, pigs, carcasses, and workers

61%
Ivbule M., Miklasevics E., Cupane L., Berzina L., Balins A., Valdovska A.
Journal of Veterinary Research
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2017
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tom 61
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nr 3
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