Veterinary ionophore antibiotics used for prevention and treatment of coccidiosis in poultry. They enter the environment with the use of contaminated manure on agricultural land. Despite their extensive use, the effects of monensin and lasalocid on non-target soil organisms are poorly explored. We used classical subleathal ecotoxicity tests to assess their effects on earthworms (Eisenia andrei) and isopods (Porcellio scaber) and compared the results with tests using avoidance behaviour as the endpoint. The results showed that avoidance is a much more sensitive endpoint. Using the avoidance test results for calculating the predicted no-effect concentration (PNEC) of lasalocid to soil invertebrates, the value is close to the predicted environmental concentration (PEC). This indicates that the use of ionophore-contaminated manure could impair the habitat function of agricultural soils.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 3540090Proceedings of Congress (http://www2.vf.uni-lj.si/isacp-esvcp/), comprising 183 pages include a presentation of the winners, biographies of the 38 invited speakers, 50 invited lectures, 46 abstracts of oral presentations of scientific work and 80 abstracts of poster presentations. Proceedings of the Congress is included in the bibliographic database for area of expertise Biotechnology (CAB - Abstracts)
C.01 Editorial board of a foreign/international collection of papers/book
COBISS.SI-ID: 262333952Immunosuppression causes in intensive poultry production important health problems and high economic losses. Immunosupressive diseases could be divided into two categories; diseases caused by specific pathogenic microorganisms, and diseases which are provoked by intoxication with mycotoxins and stress factors. Beside higher mortality which is caused mainly by specific immunosuppressive viruses, the dysfunction of the immune competent organs leads to high susceptibility to secondary infections, sub-optimal response to vaccinations and poor production results. In the paper the importance of highly infectious and economical very important viral diseases is discussed.
B.04 Guest lecture
COBISS.SI-ID: 3530106In the pre-accession period to the EU Slovenia has adopted a number of changes regarding veterinary legislation, infrastructure and institution building to get in line with the EU standards and norms. One of these changes was cessation of vaccination against CSF in domestic pig population. Upon cessation of vaccination, regular monitoring program has been established in order to obtain the exact epizootiological situation in pig population. Swill feeding as an important source of possible CSF infection was banned in October 2003. In autumn 2003 Slovenia was included in the list of countries from which export of live pigs, fresh pig meat and pig meat products to the EU was allowed. The last outbreak of classical swine fever (CSF) in Slovenia was recorded in 1996. CSF virus has never been detected in wild boar population and vaccination against CSF in wild boar population has never been practiced. In case of an outbreak measures in line with the Council Directive 2001/89/EC would be implemented. Although the CSF situation in Slovenia and in the majority of other EU Member States and neighbouring countries is rather favourable, CSF remains a serious threat in the region.
B.04 Guest lecture
COBISS.SI-ID: 3544698The knowledge about stability of the residues of veterinary drugs and their metabolites in food is important for the consumer and laboratories. Surveillance of residues will be easier if at the appropriate storage of samples, storage time would not affect the measured value. In any case the laboratory must know the reasonable time of sample storage. The stability was checked in samples containing veterinary drugs as result of animal treatment or consumption of contaminated feed. We tested the food in which residues of veterinary drugs were most often found. We were interested in the behaviour of coccidiostats in eggs and sulphonamides in honey. The variations between bound and unbound forms of one of the metabolite of nitrofuran in eggs were observed. As samples must be retained to the end of the administration process, the test period was longer then the expired date. The results show that the stability of chemically similar substances in the same food is similar. The concentrations of six coccidiostats remained unchanged for nine months. The same could be said for bound and unbound forms of semicarbazide in eggs. The minimal change in the concentration of sulfamonomethoxine in honey was detected not earlier than after twelve months.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 3531130