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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.


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.


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.


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.


Grant
Agency: Cordis | Branch: FP7 | Program: CP-SICA | Phase: KBBE-2007-1-3-09 | Award Amount: 7.62M | Year: 2009

This project aims at Improving Human Health and Animal Production in developing countries through Integrated Control of Neglected Zoonoses in animals, based on Scientific Innovation and Public Engagement. Neglected zoonoses, such as anthrax, rabies, brucellosis, bovine TB, zoonotic trypanosomiasis, echinococcosis, cysticercosis and leishmaniasis, are major causes of ill-health in developing countries in Africa, Asia and Latin America. Production animals and companion animals of significant societal value act as reservoirs for transmission to man, and the burden of these diseases on affected communities is compounded by the adverse effects many diseases have on the productivity of livestock and hence the livelihoods of the poor. Control of these diseases in animals represents an opportunity to address the constraints they pose to both human health and animal productivity, thereby contributing to poverty reduction and the MDGs. Effective control in animals will require scientific innovation to identify and (where necessary) develop tools for diagnosis, for quantification of disease burdens, and for control. Public engagement at all stakeholder levels will be needed to ensure that strategies are appropriate for use in affected communities and are adopted within the policy framework of affected countries. The project will: (i) map and review research activities at a global level, (ii) survey and assess the burden of zoonoses in communities, (iii) improve or develop disease control tools as appropriate for conditions in affected countries, with private sector inputs where appropriate, (iv) develop cost-effective control and prevention strategies taking into account economic, sociological and cultural factors as well as traditional knowledge, (v) build capacity in ICPCs through technology transfer and training and (vi) empower communities and policy makers to utilise control and prevention strategies appropriately and effectively.

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