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Niczyporuk J.S.,National Veterinary Research Institute
Archives of Virology | Year: 2016

Fowl adenoviruses (FAdVs) are widely distributed in chickens in Poland and throughout the world. FAdV infections have been reported in the United States, Australia, Europe, and the Mediterranean basin. Detection of FAdVs strains is very important from the epidemiological point of view and for monitoring disease outbreaks and developing strategies for vaccine development. Several molecular epidemiology and phylogenetic studies have been performed, but the results obtained are still limited, because FAdV strains, even of the same serotype, have very diverse characteristics. Some strains are pathogenic and some are nonpathogenic. This report describes the successful isolation of 96 FAdV field strains from chickens in Poland. A PCR assay specific for the L1 loop region of the hexon gene was conducted, and the products were subjected to sequence analysis. The sequences were analysed using BLAST and Geneious 6.0 software and compared to adenovirus field and reference strain sequences from different parts of the world that are accessible in the NCBI GenBank database. The sequences of the adenovirus strains indicated that they belonged to five species, Fowl aviadenovirus A-E, represented by eight serotypes FAdV-1, FAdV-4, FAdV-5, FAdV-7, FAdV-8a, FAdV-8b, and FAdV-2/11 (FAdV-D). The relationships between FAdVs isolated in Poland and isolates from other regions of the world were determined. © 2015, Springer-Verlag Wien. Source


Wasinski B.,National Veterinary Research Institute | Dutkiewicz J.,Institute of Rural Health
Annals of Agricultural and Environmental Medicine | Year: 2013

Leptospirosis is a widespread although recently neglected zoonosis recognized worldwide. The disease seems to be underestimated, especially in countries located in the temperate climatic zone. The presented article concerns the main characteristics of leptospirosis and describes formerly known and recently observed environmental, occupational and recreational risk factors significant in the spreading and pathogenesis of the disease. The aspects of epidemiology significant in the temperate climatic zone are emphasized. The majority of cited articles present cases of the disease reported from Europe or North America. Climatic changes (warming) and extreme weather events such as foods are potential risk factors of leptospirosis. Also, some socio-economic phenomena, such as the intensive migration of people resulting in the transfer of the infections acquired in tropical countries, or worsening of economic status in the cities, increase the probability of disease. Apart from the danger connected with rodents, which are the main vectors of leptospires, occurrence of the disease in dogs and cats can generate a higher risk of infection for humans. Infections may also be acquired during various types of agricultural work and during recreational activities, such as swimming. The results of recent investigations show that ticks are also potential vectors of leptospires. The more frequent emergence of leptospirosis in countries located in the temperate climatic zone emphasize the need to verify knowledge related to the risk of its appearance, and to consider this disease during diagnostic processes. Source


Kehl T.,German Cancer Research Center | Tan J.,Nankai University | Materniak M.,National Veterinary Research Institute
Viruses | Year: 2013

Within the field of retrovirus, our knowledge of foamy viruses (FV) is still limited. Their unique replication strategy and mechanism of viral persistency needs further research to gain understanding of the virus-host interactions, especially in the light of the recent findings suggesting their ancient origin and long co-evolution with their nonhuman hosts. Unquestionably, the most studied member is the primate/prototype foamy virus (PFV) which was originally isolated from a human (designated as human foamy virus, HFV), but later identified as chimpanzee origin; phylogenetic analysis clearly places it among other Old World primates. Additionally, the study of non-simian animal FVs can contribute to a deeper understanding of FV-host interactions and development of other animal models. The review aims at highlighting areas of special interest regarding the structure, biology, virus-host interactions and interspecies transmission potential of primate as well as non-primate foamy viruses for gaining new insights into FV biology. © 2013 by the authors; licensee MDPI, Basel, Switzerland. Source


The background of quinolone resistance was characterized in ciprofloxacin-resistant commensal Escherichia coli selected out of 3,551 isolates from slaughtered animals in Poland between 2009 and 2012. Plasmid-mediated determinants were suspected in 6.2% of the study group, ranging from 1.1% in cattle to 9.7% in turkeys. Polymerase chain reaction and sequencing identified up to four quinolone resistance-determining substitutions in gyrA (Ser83, Asp87) and parC (Ala56, Ser80). Plasmid-mediated mechanisms were identified as qnrS1 (or qnrS3, n=70, including six isolates with chromosomal mutations), qnrB19 (or qnrB10, n=19), and qnrB17 (n=1). All tested isolates were negative for qnrA, qnrC, qnrD, qepA, and aac(6′)-Ib-cr. Still, there were several E. coli suspected for both plasmid-and chromosome-mediated resistance with unrevealed genetic background of the phenomenon. Since all tested isolates showed diverse XbaI-PFGE profiles, chromosome-encoded quinolone resistance does not result from the spread of a single resistant clone, however, it is rather due to antimicrobial pressure leading to the selection of random gyr and par mutants. It also favors the selection and spread of plasmids carrying predominant qnr genes, since the same determinants were found in Salmonella, isolated from similar sources. The identification of carrier plasmids and mitigation of their spread might be essential for sustainable quinolone usage in animal husbandry and efficient protection of human health. © 2014 Mary Ann Liebert, Inc. Source


Wasyl D.,National Veterinary Research Institute | Hoszowski A.,National Veterinary Research Institute
Food Research International | Year: 2012

The first CTX-M-producing Salmonella was described in primary animal production in Poland, due to the antimicrobial resistance monitoring and control program introduced in turkeys. It was associated with the outbreak of multiresistant Salmonella Kentucky in non-diseased turkeys, foods and food production environment, but found also in municipal sewage sludge. The emergence along the food chain of clonally related strains resistant to critically important antimicrobial agents, including cephalosporins, quinolones, sulfonamides, aminoglycosides, phenicols, and tetracycline, which are used against foodborne pathogens, poses a serious public health threat. © 2011 Elsevier Ltd. Source

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